A molecular phylogeny of Hemiptera inferred from mitochondrial genome sequences.

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Nan Song

Full Text Available Classically, Hemiptera is comprised of two suborders: Homoptera and Heteroptera. Homoptera includes Cicadomorpha, Fulgoromorpha and Sternorrhyncha. However, according to previous molecular phylogenetic studies based on 18S rDNA, Fulgoromorpha has a closer relationship to Heteroptera than to other hemipterans, leaving Homoptera as paraphyletic. Therefore, the position of Fulgoromorpha is important for studying phylogenetic structure of Hemiptera. We inferred the evolutionary affiliations of twenty-five superfamilies of Hemiptera using mitochondrial protein-coding genes and rRNAs. We sequenced three mitogenomes, from Pyrops candelaria, Lycorma delicatula and Ricania marginalis, representing two additional families in Fulgoromorpha. Pyrops and Lycorma are representatives of an additional major family Fulgoridae in Fulgoromorpha, whereas Ricania is a second representative of the highly derived clade Ricaniidae. The organization and size of these mitogenomes are similar to those of the sequenced fulgoroid species. Our consensus phylogeny of Hemiptera largely supported the relationships (((Fulgoromorpha,Sternorrhyncha,Cicadomorpha,Heteroptera, and thus supported the classic phylogeny of Hemiptera. Selection of optimal evolutionary models (exclusion and inclusion of two rRNA genes or of third codon positions of protein-coding genes demonstrated that rapidly evolving and saturated sites should be removed from the analyses.

Phylogenetic relationships of Hemiptera inferred from mitochondrial and nuclear genes.

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Song, Nan; Li, Hu; Cai, Wanzhi; Yan, Fengming; Wang, Jianyun; Song, Fan

2016-11-01

Here, we reconstructed the Hemiptera phylogeny based on the expanded mitochondrial protein-coding genes and the nuclear 18S rRNA gene, separately. The differential rates of change across lineages may associate with long-branch attraction (LBA) effect and result in conflicting estimates of phylogeny from different types of data. To reduce the potential effects of systematic biases on inferences of topology, various data coding schemes, site removal method, and different algorithms were utilized in phylogenetic reconstruction. We show that the outgroups Phthiraptera, Thysanoptera, and the ingroup Sternorrhyncha share similar base composition, and exhibit "long branches" relative to other hemipterans. Thus, the long-branch attraction between these groups is suspected to cause the failure of recovering Hemiptera under the homogeneous model. In contrast, a monophyletic Hemiptera is supported when heterogeneous model is utilized in the analysis. Although higher level phylogenetic relationships within Hemiptera remain to be answered, consensus between analyses is beginning to converge on a stable phylogeny.

Saproxylic Hemiptera Habitat Associations

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Michael D. Ulyshen; James L. Hanula; Robert L. Blinn; Gene. Kritsky

2012-01-01

Understanding the habitat requirements of organisms associated with dead wood is important in order to conserve them in managed forests. Unfortunately, many of the less diverse saproxylic taxa, including Hemiptera, remain largely unstudied. An effort to rear insects from dead wood taken from two forest types (an upland pine-dominated and a bottomland mixed hardwood),...

Fungal flora of the digestive tract of Triatoma infestans (Hemiptera: Reduviidae from Argentina Flora fúngica de tractos digestivos en Triatoma infestans (Hemiptera: Reduviidae en Argentina

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G. A. Marti

Full Text Available A survey of the fungal microbiota of the digestive tract of Triatoma infestans (Klug (Hemiptera: Reduviidae adults was carried out. Insects captured in the field from different provinces in Argentina, as well as individuals reared in artificial colonies, were used for dissection. Axenic cultures of the fungal species were identified and were deposited with mycological collections at La Plata , Argentina. A total of 33 fungal species, with the exception of three that were mycelia sterilia, belonging to 11 genera were identified. Thirty two species belonged to Ascomycota (Eurotiomycetes and Sordariomycetes and one to Zygomycota (Zygomycetes. The genera with the greatest number of species were Penicillium (15, Aspergillus (5, and Cladosporium (2. Among the isolated fungi, some of the species were entomopathogenic or pathogens of humans and other animals.En el presente estudio se realizó un relevamiento de la flora fúngica microbiana en tractos digestivos de adultos de Triatoma infestans (Klug (Hemiptera: Reduviidae. Se disecaron insectos capturados del campo en diferentes provincias Argentinas, así como también se utilizaron individuos de una colonia artificial. Fueron realizados cultivos axénicos de las especies fúngicas aisladas, los que fueron identificados y luego depositados en las colecciones de hongos entomopatógenos del CEPAVE La Plata , Argentina. Fueron identificadas 33 especies fúngicas perteneciente a 11 géneros. Treinta y dos especies pertenecen a Ascomycota (Eurotiomycetes y Sordariomycetes y una a Zygomycota (Zygomycetes. Los géneros con mayor número de especies fueron Penicillium (15, Aspergillus (5, y Cladosporium (2. Entre los aislamientos fúngicos, algunas de las especies encontradas son entomopatogénicas o patógenas de humanos y otros animales.

The complete mitochondrial genome of a spiraling whitefly, Aleurodicus dispersus Russell (Hemiptera: Aleyrodidae).

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Ming-Xing, Lu; Zhi-Teng, Chen; Wei-Wei, Yu; Yu-Zhou, Du

2017-03-01

We report the complete mitochondrial genome (mitogenome) of a spiraling whitefly, Aleurodicus dispersus (Hemiptera: Aleyrodidae). The 16 170 bp long genome consists of 13 protein-coding genes, 20 transfer RNAs, 2 ribosomal RNAs, and a control region. The A. dispersus mitogenome also includes a cytb-like non-coding region and shows several variations relative to the typical insect mitogenome. A phylogenetic tree has been constructed using the 13 protein-coding genes of 12 related species from Hemiptera. Our results would contribute to further study of phylogeny in Aleyrodidae and Hemiptera.

Diaspidídeos e parasitoides associados ao cultivo da videira no Rio Grande do Sul, Brasil

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Vera Regina dos Santos Wolff

2014-12-01

Full Text Available As cochonilhas-com-escudo (Hemiptera, Diaspididae têm causado prejuízos significativos à cultura da videira no Rio Grande do Sul, principalmente em Vitis labrusca L. da cv. Niágara. No período de setembro de 2009 a outubro de 2011, foi realizado um inventário das espécies de Diaspididae ocorrentes no tronco das videiras e dos parasitoides associados. Foram avaliadas 32 propriedades localizadas nos municípios de Bento Gonçalves, Caxias do Sul, Flores da Cunha e Sarandi-RS. A espécie mais frequente e abundante foi Hemiberlesia lataniae (Signoret, 1869. Melanaspis arnaldoi (Costa Lima, 1924 e Pseudaonidia marquesi Costa Lima, 1924 foram registradas pela primeira vez em V. labrusca. Todas as espécies de cochonilhas apresentaram perfurações nos escudos indicando níveis de parasitismo natural que variaram de 11,3 a 76,5% para H. lataniae, de 9 a 58,8% para M. arnaldoi e de 3,4 a 22,2% para P. marquesi. As seguintes associações entre parasitoides e cochonilhas foram encontradas: Encarsia sp. (Aphelinidae, Plagiomerus sp. (Encyrtidae, Amitus sp. (Platygastridae e o hiperparasitoide Chartocerus sp. (Signiphoridae a H. lataniae; Homalopoda sp. (Encyrtidae a P. marquesi e Chartocerus sp. a M. arnaldoi. Amitus sp., Homalopoda sp. e Chartocerus sp. foram associados pela primeira vez com estes diaspidídeos.

Description of the immature stages of the planthopper Lacertinella australis (Hemiptera: Delphacidae)

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Batiz, M. F. Rossi; Marino de Remes Lenicov, A. M.; Hagedorn, Henry

2014-01-01

Abstract The five immature stages of the planthopper Lacertinella australis (Remes Lenicov and Rossi Batiz) (Hemiptera: Delphacidae: Saccharosydnini) are described and illustrated. The main characters that allowed us to distinguish the various stages were body size, number of tarsomeres and metatibial spines, and number of teeth on the spur. New biological data based on laboratory rearing and field observations showed that L. australis can carry out its biological cycle successfully on the graminaceous pampas grass ( Cortaderia spp. Stapf (Poales: Poaceae)). In addition, the efficient rearing in captivity, the high survivorship registered, and overwintering only on this host plant suggests that L. australis is a potential biocontrol agent of this invasive graminaceous weed. This study provides information about the immature stages , including a key for their identification, based on laboratory reared specimens and field observations. Resumen Se describen e ilustran las cinco etapas inmaduras de la especie de Saccharisydnini Lacertinella australis (Remes Lenicov and Rossi Batiz) (Hemiptera: Delphacidae). Los principales caracteres que permitieron distinguir las diferentes etapas fueron: tamaño corporal, número de espinas en los tarsómeros y metatibia y número de dientes en el espolón tibial. Nuevos datos biológicos, basados en la cría de laboratorio y observaciones de campo, mostraron que L. australis puede realizar su ciclo biológico exitosamente en la graminácea cortadera ( Cortaderia spp. Stapf (Poales: Poaceae)). Además, la eficiente crianza en cautive-rio y la alta supervivencia registrada en esta planta hospedera, sugieren que L. australis podría ser usada como un potencial agente de control biológico de esta maleza invasora. Este estudio proporciona informa-ción sobre las etapas inmaduras, incluyendo una clave para su identificación, basada en individuos provenientes de la cría de laboratorio y de campo. PMID:25199992

Registro de Thaumastocoris peregrinus (Hemiptera, Thaumastocoridae) no Estado do Paraná

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Barbosa, Leonardo Rodrigues; Santos, Franciele; Wilcken, Carlos F.; Soliman, Everton P.

2010-01-01

It is recorded the occurrence of Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera, Thaumastocoridae) in eucalyptus trees in the State of Parana, Brazil. The insect was observed in June at 2009, in Curitiba region.

doi: 10.4336/2010.pfb.30.61.75

É registrada a ocorrência de Thaumastocoris peregrinus Carpintero & Dellapé, 2006 (Hemiptera, Thaumastocoridae) em árvores de eucalipto no Estado do Paraná. Infestações foram o...

Rediscovering digitules in Aphidomorpha and the question of homology among Sternorrhyncha (Insecta, Hemiptera

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Mark A. Metz

2017-07-01

Full Text Available We explore and expand on the morphological term digitule. The term was originally proposed for toe-like setae on a species of Phylloxera Boyer de Fonscolombe, 1834 (Hemiptera, Sternorrhyncha, Aphidomorpha by Henry Shimer, an American naturalist. While it is standard terminology in scale systematics (Hemiptera, Sternorrhyncha, Coccidomorpha, the term digitule was ignored by aphid specialists despite being the original taxon for which the term was described. Similar setae occur on many arthropod groups, so the homology is poorly understood even within any superfamily of Hemiptera. We provide the etymology of the term, a proposed explanation for why it was used among scale taxonomists and not aphid taxonomists, and discuss briefly options to progress beyond the confusion between terminology for morphology and homology in Sternorrhyncha.

Galls and gall makers in plants from the Pé-de-Gigante Cerrado Reserve, Santa Rita do Passa Quatro, SP, Brazil.

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Urso-Guimarães, M V; Scareli-Santos, C

2006-02-01

Thirty-six morphologically different types of galls were obtained in leaves, leaflets, veins, petioles, stems, tendrils and flower buds from twenty-five species of plants in the Pé-de-Gigante Reserve, municipality of Santa Rita do Passa Quatro, state of São Paulo, Brazil. The host plant species belong to the closely related families Anacardiaceae, Annonaceae, Asteraceae, Bignoniaceae, Caryocaraceae, Erythroxylaceae, Fabaceae, Malpighiaceae, Melastomataceae, Myrtaceae, Ochnaceae, Polygalaceae, Sapindaceae, Sapotaceae, and Smilacaceae. The most common gall makers included Cecidomyiidae (Diptera), Pteromalidae (Hymenoptera) and Diaspididae (Sternorrhyncha-Hemiptera). This is the first report of galls found in the following plant genera: Gochnatia (Asteraceae), Distictela (Bignoniaceae), Banisteriopsis (Malpighiaceae), Ouratea (Ochnaceae), and Bredemeyera (Polygalaceae). The results of this work contribute to the body of knowledge about the relationship among host plants, gall makers, and the gall morphology of Pé-de-Gigante Cerrado Reserve.

Galls and gall makers in plants from the Pé-de-Gigante Cerrado Reserve, Santa Rita do Passa Quatro, SP, Brazil

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M. V. Urso-Guimarães

Full Text Available Thirty-six morphologically different types of galls were obtained in leaves, leaflets, veins, petioles, stems, tendrils and flower buds from twenty-five species of plants in the Pé-de-Gigante Reserve, municipality of Santa Rita do Passa Quatro, state of São Paulo, Brazil. The host plant species belong to the closely related families Anacardiaceae, Annonaceae, Asteraceae, Bignoniaceae, Caryocaraceae, Erythroxylaceae, Fabaceae, Malpighiaceae, Melastomataceae, Myrtaceae, Ochnaceae, Polygalaceae, Sapindaceae, Sapotaceae, and Smilacaceae. The most common gall makers included Cecidomyiidae (Diptera, Pteromalidae (Hymenoptera and Diaspididae (Sternorrhyncha-Hemiptera. This is the first report of galls found in the following plant genera: Gochnatia (Asteraceae, Distictela (Bignoniaceae, Banisteriopsis (Malpighiaceae, Ouratea (Ochnaceae, and Bredemeyera (Polygalaceae. The results of this work contribute to the body of knowledge about the relationship among host plants, gall makers, and the gall morphology of Pé-de-Gigante Cerrado Reserve.

A mutualism without honeydew: what benefits for Melissotarsus emeryi ants and armored scale insects (Diaspididae?

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Christian Peeters

2017-07-01

Full Text Available Mutualisms between ants and sap-sucking insects generally involve clear benefits for both partners: the ants provide protection in exchange for honeydew. However, a single ant genus associates with armoured scale insects (Diaspididae that do not excrete honeydew. We studied three colonies of Melissotarsus emeryi ants from two localities in Mozambique. Vast numbers of the diaspidid Morganella conspicua occupied galleries dug by the ants under the bark of living trees. Unlike free-living M. conspicua and other diaspidids, M. conspicua living with ants are known to lack shields, likely because they gain protection against enemies and desiccation. Nevertheless, we documented the occurrence of rare individuals with shields inside ant galleries, indicating that their glands continue to secrete wax and proteins as building material. This is likely to constitute a significant portion of the ants’ diet, in addition to diaspidid exuviae and excretions from the Malpighian tubules. Indeed, Melissotarsus workers cannot walk outside the galleries due to modified middle legs, forcing them to obtain all nourishment within the tree. Melissotarsus founding queens, however, must locate a suitable host tree while flying, and acquire diaspidid crawlers. This mutualism involves ants that are highly specialised to chew through living wood, and diaspidids that can also live freely outside the bark. It is extremely widespread in Africa and Madagascar, recorded from 20 tree families, and harmful effects on plant hosts require rapid study.

Host Range Specificity of Scymnus camptodromus (Coleoptera: Coccinellidae), A Predator of Hemlock Woolly Adelgid (Hemiptera: Adelgidae).

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Limbu, Samita; Cassidy, Katie; Keena, Melody; Tobin, Patrick; Hoover, Kelli

2016-02-01

Scymnus (Neopullus) camptodromus Yu and Liu (Coleoptera: Coccinellidae) was brought to the United States from China as a potential biological control agent for hemlock woolly adelgid (Adelges tsugae Annand) (Hemiptera: Adelgidae). Scymnus camptodromus phenology is closely synchronized with that of A. tsugae and has several characteristics of a promising biological control agent. As a prerequisite to field release, S. camptodromus was evaluated for potential nontarget impacts. In host range studies, the predator was given the choice of sympatric adelgid and nonadelgid prey items. Nontarget testing showed that S. camptodromus will feed to some degree on other adelgid species, but highly prefers A. tsugae. We also evaluated larval development of S. camptodromus on pine bark adelgid (Pineus strobi (Hartig)) (Hemiptera: Adelgidae) and larch adelgid (Adelges laricis Vallot) (Hemiptera: Adelgidae); a small proportion of predator larvae was able to develop to adulthood on P. strobi or A. laricis alone. Scymnus camptodromus showed no interest in feeding on woolly alder aphid (Paraprociphilus tessellatus Fitch) (Hemiptera: Aphididae) or woolly apple aphid (Eriosoma lanigerum (Hausmann)) (Hemiptera: Aphididae), and minimal interest in cotton aphid (Aphis gossypii Glover) (Hemiptera: Aphididae) in choice and no-choice experiments. Scymnus camptodromus females did not oviposit on any host material other than A. tsugae-infested hemlock. Under the circumstances of the study, S. camptodromus appears to be a specific predator of A. tsugae, with minimal risk to nontarget species. Although the predator can develop on P. strobi, the likelihood that S. camptodromus would oviposit on pine hosts of this adelgid is small.

Application of RNA-seq for mitogenome reconstruction, and reconsideration of long-branch artifacts in Hemiptera phylogeny

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Song, Nan; An, Shiheng; Yin, Xinming; Cai, Wanzhi; Li, Hu

2016-01-01

Hemiptera make up the largest nonholometabolan insect assemblage. Despite previous efforts to elucidate phylogeny within this group, relationships among the major sub-lineages remain uncertain. In particular, mitochondrial genome (mitogenome) data are still sparse for many important hemipteran insect groups. Recent mitogenomic analyses of Hemiptera have usually included no more than 50 species, with conflicting hypotheses presented. Here, we determined the nearly complete nucleotide sequence of the mitogenome for the aphid species of Rhopalosiphum padi using RNA-seq plus gap filling. The 15,205 bp mitogenome included all mitochondrial genes except for trnF. The mitogenome organization and size for R. padi are similar to previously reported aphid species. In addition, the phylogenetic relationships for Hemiptera were examined using a mitogenomic dataset which included sequences from 103 ingroup species and 19 outgroup species. Our results showed that the seven species representing the Aleyrodidae exhibit extremely long branches, and always cluster with long-branched outgroups. This lead to the failure of recovering a monophyletic Hemiptera in most analyses. The data treatment of Degen-coding for protein-coding genes and the site-heterogeneous CAT model show improved suppression of the long-branch effect. Under these conditions, the Sternorrhyncha was often recovered as the most basal clade in Hemiptera. PMID:27633117

Parasitoidism Rate and Life Table Parameters of Aphytis diaspidis (Howard (Hymenoptera: Aphelinidae and Hemiberlesia lataniae (Signoret (Hemiptera: Diaspididae Tasa de Parasitoidismo y Parámetros de Tabla de Vida de Aphytis diaspidis (Howard (Hymenoptera: Aphelinidae y Hemiberlesia lataniae (Signoret (Hemiptera: Diaspididae

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Dennis Navea O

2012-09-01

Full Text Available Latania scale, Hemiberlesia lataniae (Signoret, has become a major pest of avocado (Persea americana Mill. in Chile and has reached high populations in the fruit because of limited natural control. The objective of this study was to identify the biological parameters of the parasitoid Aphytis diaspidis (Howard as a control agent of latania scale. Postembryonic development, parasitoidism rate, and life table parameters of the parasitoid and scale were determined under laboratory conditions. Aphytis diaspidis postembryonic development and parasitoidism rate varied significantly when evaluated on distinct latania scale stages with the highest survival (56% occurring at the third scale stage, it also had the shortest development time between egg and adult (19.14 d and the highest parasitoidism rate (66%. The intrinsic growth rate (r m was higher for A. diaspidis (r m = 0.099 than latania scale (r m = 0.068. These laboratory results demonstrated that A. diaspidis is an effective parasitoid for decreasing H. lataniae populations, especially in the third stage.La escama latania, Hemiberlesia lataniae (Signoret, se ha transformado en Chile en una plaga de importancia primaria en palto (Persea americana Mill., donde alcanza altas poblaciones en la fruta debido al escaso control natural existente. El objetivo del presente estudio fue conocer parámetros biológicos del parasitoide Aphytis diaspidis (Howard, como agente de control de la escama latania. Es asi como se determinó en laboratorio el desarrollo postembrionario, tasa de parasitoidismo, y parámetros de tabla de vida del parasitoide y la escama. El desarrollo postembrionario y la tasa de parasitoidismo de A. diaspidis varió significativamente al ser evaluado sobre distintos estadios de la escama latania, alcanzando el mayor porcentaje de supervivencia (56% sobre el tercer estadio de la escama, asi como el menor tiempo de desarrollo entre huevo y adulto (19,14 d y la máxima tasa de

Preliminary Observations on Zelus obscuridorsis (Stål (Hemiptera: Reduviidae as Predator of the Corn Leafhopper (Hemiptera: Cicadellidae in Argentina

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Eduardo G. Virla

2015-06-01

Full Text Available The corn leafhopper Dalbulus maidis (Hemiptera: Cicadellidae, is an important corn pest in most of tropical and subtropical America. This leafhopper has a rich natural enemy complex of which parasitoids and pathogens are the most studied; knowledge on its predators is limited. We noted the presence of the native assassin bug Zelus obscuridorsis (Hemiptera: Reduviidae predating diverse motile insects, including the corn leafhopper, on corn plants cultivated in household vegetable gardens in San Miguel de Tucumán (Argentina; in order to verify its predatory actions, we exposed lab-bred individuals of D. maidis to adults of Z. obscuridorsis. The predators were starved for 24 h before trials in which the corn leafhopper in different developmental stages were exposed. Zelus obscuridorsis is highly skilled in catching specimens in motion, but it was not able to prey on eggs. The predator was capable to catch and prey on nymphs and adults.

Essential oils as fumigants for bed bugs (Hemiptera: Cimicidae)

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In Petri dish assays, fumigation of a pyrethroid-susceptible strain of bed bugs Cimex lectularius L. (Hemiptera: Cimicidae) with various essential oils resulted in mortality that approached or equaled 100%, after 5 days. However, when bed bugs were exposed to the same essential oils in sealed, comme...

Sobre o gênero Diaspidistis (Hemiptera, Diaspididae, com a descrição de duas espécies novas About Diaspidistis (Hemiptera, Diaspididae with description of two new species

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Vera R. S Wolff

2010-09-01

Full Text Available O gênero Diaspidistis Hempel, 1900 foi estudado. Foram redescritas Diaspidistis multilobis Hempel, 1900 e D. squamosa Hempel, 1937. Novas combinações são propostas: D. gomescostai (Lepage & Giannotti, 1946, D. memorabilis (Ferris, 1941, D. multipunctata (Lepage & Giannotti, 1946 e D. petasata (Ferris, 1942. São descritas e ilustradas duas espécies novas: Diaspidistis fonsecai sp. nov. e Diaspidistis tucumanensis sp. nov. Uma chave para identificação das espécies é apresentada baseada em fêmeas adultas.The genus Diaspidistis Hempel, 1900 was studied. Diaspidistis multilobis Hempel, 1900 and D. squamosa Hempel, 1937 were redescribed. New combinations are proposed: D. gomescostai (Lepage & Giannotti, 1946, D. memorabilis (Ferris, 1941, D. multipunctata (Lepage & Giannotti, 1946 and D. petasata (Ferris, 1942. Two new species are described and illustrated: Diaspidistis fonsecai sp. nov. and Diaspidistis tucumanensis sp. nov. A key to the species is presented based on adult females.

Verde plant bug, Creontiades signatus (Hemiptera: Miridae) effects of insect density and bloom period of infestation on cotton damage and yield

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The verde plant bug, Creontiades signatus Distant (Hemiptera: Miridae), has emerged as a threat to cotton in South Texas, causing boll damage similar to boll-feeding stink bugs (Hemiptera: Pentatomidae). Verde plant bugs were released into caged cotton for a one-week period to characterize the effec...

Development of DNA barcodes of genus Lygus Hahn (Hemiptera: Miridae)

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The genus Lygus (Hemiptera: Miridae) is an important group of insects that contains 43 known species worldwide. Some species within this genus are important agricultural pests in North America. Annual economic impacts in cotton, Gossypium hirsutum L., from Lygus spp. due to yield losses and control ...

Preparing soft-bodied arthropods for microscope examination: Whiteflies (Insecta: Hemiptera: Alyrodidae)

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Proper identification of whiteflies (Hemiptera:Alyrodidae) requires preparation of the specimen on a microscope slide. This training video provides visual instruction on how to prepare whitefly specimens on microscope slides for examination and identification. Steps ranging from collection, specimen...

Preparing soft-bodied arthropods for microscope examination: Aphids (Insecta: Hemiptera: Aphididae)

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Proper identification of aphids (Hemiptera: Aphididae) require preparation of the specimen on a microscope slide. This training video provides visual instruction on how to prepare aphid specimens on microscope slides for examination and indentification. Steps ranging from collection, specimen clear...

Catalog of the adelgids of the world (Hemiptera, Adelgidae)

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Colin Favret; Nathan P. Havill; Gary L. Miller; Masakazu Sano; Benjamin Victor

2015-01-01

A taxonomic and nomenclatural Catalogue of the adelgids (Hemiptera: Adelgidae) is presented. Six family-group names are listed, five being synonyms of Adelgidae. Twenty-two genus-group names, of which nine are subjectively valid and in use, are presented with their type species, etymology, and grammatical gender. One hundred and six species-group names are listed, of...

The complete mitochondrial genome sequence of Diaphorina citri (Hemiptera: Psyllidae)

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The first complete mitochondrial genome (mitogenome) sequence of Asian citrus psyllid, Diaphorina citri (Hemiptera: Psyllidae), from Guangzhou, China is presented. The circular mitogenome is 14,996 bp in length with an A+T content of 74.5%, and contains 13 protein-coding genes (PCGs), 22 tRNA genes ...

“Candidatus Phytoplasma pyri” affects behavior of Cacopsylla pyricola (Hemiptera: Psyllidae)

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Pear psylla, Cacopsylla pyricola (Hemiptera: Psyllidae), is a key pest of pear and is a vector of "Candidatus Phytoplasma pyri", the pathogen associated with pear decline disease. Although commercial pear trees are grafted to Phytoplasma-resistant rootstock, a recent report indicated that many C. p...

Observations on some species of the genus Lyramorpha Westw. (Hemiptera Heteroptera)

NARCIS (Netherlands)

Schouteden, H.

1908-01-01

1. Lyramorpha pallida Westwood and L. rosea Westwood. In his »Catalogue of Hemiptera in the Collection of the Rev. W. F. Hope”, part I, London 1837, Westwood founded the genus Lyramorpha, with two species, L. rosea and L. pallida, both from New Holland.

First report and morphological redescription of Teleonemia morio (Stål (Hemiptera, Tingidae in Annona squamosa L. (Annonaceae in Brazil

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Sônia M. F. Broglio

2012-03-01

Full Text Available First report and morphological redescription of Teleonemia morio (Stål (Hemiptera, Tingidae in Annona squamosa L. (Annonaceae in Brazil. This is the first report of a severe attack of Teleonemia morio (Stål, 1855 (Hemiptera, Heteroptera, Tingidae on Annona squamosa L. (custard apple, causing up to 80% of losses of infested trees. In order to facilitate the identification of this insect pest, the adult female of T. morio is redescribed based on specimens collected in Palmeira dos Índios, Alagoas, Brazil.Primeiro registro e redescrição morfológica de Teleonemia morio (Stål (Hemiptera, Tingidae em Annona squamosa L. (Annonaceae no Brazil. Este é o primeiro registro de um ataque severo de Teleonemia morio (Stål, 1855 (Hemiptera, Heteroptera, Tingidae em árvores de Annona squamosa L. (pinheira ou fruta-do-conde, resultando em perdas de aproximadamente 80% das plantas infestadas. Com o objetivo de facilitar a identificação deste inseto-praga, foi feita a redescrição da fêmea adulta de T. morio com base em espécimes coletados em Palmeira dos Índios, Alagoas, Brasil.

Spruce aphid (Elatobium abietinum Walker) (Hemiptera: Aphididae) [Chapter XXIV

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Ann M. Lynch

2014-01-01

Elatobium abietinum Walker is a spruce-feeding aphid that in Europe is referred to as the green spruce aphid (Day et al., 1998a) (Fig. 1). However, in North America E. abietinum is known simply as the spruce aphid, while the common name "green spruce aphid" refers to a different species, Cinara fornacula Hottes (Hemiptera: Aphididae) (http://www.entsoc.org/...

Rhizoecus colombiensis Ramos & Caballero, a new species of hypogeal mealybug (Hemiptera: Coccomor.

Science.gov (United States)

Ramos-Portilla, Andrea Amalia; Caballero, Alejandro

2016-03-14

A new species belonging to Rhizoecus Künckel d'Herculais (Hemiptera: Coccomorpha: Rhizoecidae) is described, with hosts and distribution data in the New World. A dichotomous and illustrated key for the twelve species of Rhizoecus recorded from Colombia is presented.

Preparing soft-bodied arthropods for microscope examination: Soft Scales (Insecta: Hemiptera: Coccidae)

Science.gov (United States)

Proper identification of soft scales (Hemiptera:Coccidae) requires preparation of the specimen on a microscope slide. This training video provides visual instruction on how to prepare soft scale specimens on microscope slides for examination and identification. Steps ranging from collection, speci...

Instar- and stage-specific photoperiodic diapause response of Lygus hesperus (Hemiptera: Miridae)

Science.gov (United States)

The western tarnished plant bug (Lygus hesperus Knight)(Hemiptera:Miridae) is a polyphagous pest of numerous western crops. This pest overwinters in a relatively short duration adult diapause, but many details regarding diapause induction and maintenance remain unstudied. Instar-specific responses t...

Preparing sternorrhynchous insects (Insecta: Hemiptera: Sternorrhyncha) for microscope examination: Hoyer’s mounting medium

Science.gov (United States)

Proper identification of aphids, scale insects, psyllids, and whitefles (Hemiptera: Sternorrhyncha) require preparation of the specimen on a microscope slide. This training video provides visual instruction on how to prepare sternorrhynchous specimens on microscope slides for examination and identi...

Preparing soft-bodied arthropods for arthropods for microscope examination: Mealybugs (Insects: Hemiptera: Pseudococcidae)

Science.gov (United States)

Proper identification of mealybugs (Hemiptera: Pseudococcidae) require preparation of the specimen on a microscope slide. This training video provides visual instruction on how to prepare mealybug specimens on microscope slides for examination and identification. Steps ranging from collection, spec...

Hemiptera Mitochondrial Control Region: New Sights into the Structural Organization, Phylogenetic Utility, and Roles of Tandem Repetitions of the Noncoding Segment

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Kui Li

2018-04-01

Full Text Available As a major noncoding fragment, the control region (CR of mtDNA is responsible for the initiation of mitogenome transcription and replication. Several structural features of CR sequences have been reported in many insects. However, comprehensive analyses on the structural organization and phylogenetic utility, as well as the role of tandem replications (TRs on length variation, high A+T content, and shift of base skew of CR sequences are poorly investigated in hemipteran insects. In this study, we conducted a series of comparative analyses, using 116 samples covering all 11 infraorders of the five currently recognized monophyletic groups in the Hemiptera. Several structural elements (mononucleotide stretches containing conserved sequence blocks (CSBs, TRs, and GA-rich region were identified in the mitochondrial control region in hemipteran insects, without showing a consistent location. The presence and absence of certain specific structural elements in CR sequences show the various structural organizations of that segment among the five monophyletic groups, which indicates the diversification of the control region’s structural organization in Hemiptera. Among the many groups within Hemiptera, eight monophyletic groups and three consistent phylogenetic trees were recovered, using CSBs datasets by maximum likelihood and Bayesian methods, which suggests the possible utility of CR sequences for phylogenetic reconstruction in certain groups of Hemiptera. Statistical analyses showed that TRs may contribute to the length variation, high AT content, and the shift of base skewing of CR sequences toward high AT content in the Hemiptera. Our findings enrich the knowledge of structural organization, phylogenetic utility, and roles of tandem replication of hemipteran CR, and provide a possible framework for mitochondrial control region analyses in hemimetabolous insects.

Scymnus camptodromus (Coleoptera: Coccinellidae) larval development and predation of hemlock woolly adelgid (Hemiptera: Adelgidae)

Science.gov (United States)

Samita Limbu; Melody A. Keena; David Long; Nancy Ostiguy; Kelli. Hoover

2015-01-01

Development time and prey consumption of Scymnus (Neopullus) camptodromus Yu and Liu (Coleoptera: Coccinellidae) larvae by instar, strain, and temperature were evaluated. S. camptodromus, a specialist predator of hemlock woolly adelgid Adelges tsugae (Annand) (Hemiptera:...

New species of Braggia (Hemiptera: Aphididae) on buckwheat in western North America

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K. S. Pike; G. Graf; R. G. Foottit; H. E. L. Maw; P. Stary; R. Hammon; D. G. Miller

2009-01-01

Species of Braggia Gillette and Palmer (Hemiptera: Aphididae: Aphidinae: Aphidini) feed on various buckwheat, Eriogonum Michx. (Polygonaceae), species in western North America. Two new species, Braggia columbiana Pike n. sp. from Washington and Oregon and Braggia longicauda Pike n. sp. from Washington, Oregon, and northern California, are proposed. Descriptions,...

Gut content analysis of a phloem-feeding insect, Bactericera cockerelli (Sulc) (Hemiptera: Triozidae)

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Potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae) is a key pest of potato (Solanum tuberosum L., Solanales: Solanaceae) and a vector of "Candidatus Liberibacter solanacearum," the pathogen associated with zebra chip disease. In addition to its presence on cultivated crops, the p...

Distribution and Abundance of Adelges tsugae (Hemiptera: Adelgidae) Within Hemlock Trees

Science.gov (United States)

S.V. Joseph; J.L. Hanula; S.K. Braman

2011-01-01

We studied the distribution of hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), within hemlock trees for three summer (progrediens) and two winter (sistens) generations in northern Georgia. Eastern hemlock, Tsuga canadensis (L.) Carrie` re, trees were treated with 0, 10, or 25% of 1.5 g of imidacloprid per 2.5 cm of tree diameter at breast height...

Effects of fertilizer and low rates of Imidacloprid on Adelges tsugae (Hemiptera: Adelgidae).

Science.gov (United States)

S. V. Joseph; James Hanula; S. K. Braman; F. J. Byrne

2011-01-01

Healthy hemlock trees, Tsuga canadensis (L.) Carriere, and hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), populations should favor retention and population growth of adelgid predators such as Laricobius nigrinus Fender (Coleoptera: Derodontidae) and Sasajiscymnus tsugae (Sasaji&McClure) (Coleoptera: Coccinellidae). Eastern hemlock trees...

Revisional notes on the genus Melucha (Hemiptera, Heteroptera, Coreidae

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Harry Brailovsky

2014-05-01

Full Text Available Melucha grandicula sp. n. and M. perampla sp. n., (Hemiptera: Heteroptera: Coreidae: Coreinae: Nematopodini are described from Bolivia, Colombia, Paraguay and Peru. Melucha quadrivittis Stål, 1862, stat. restit., is resurrected from synonymy under M. phyllocnemis (Burmeister, 1835. Melucha ruficornis Breddin, 1903, syn. n., is synonymized under M. lineatella (Fabricius, 1803. An identification key for the known species of Melucha Amyot & Serville, 1843 is given. New distributional records for some previously known species are added.

First report and morphological redescription of Teleonemia morio (Stål (Hemiptera, Tingidae in Annona squamosa L. (Annonaceae in Brazil

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Sônia M. F. Broglio

2012-03-01

Full Text Available First report and morphological redescription of Teleonemia morio (Stål (Hemiptera, Tingidae in Annona squamosa L. (Annonaceae in Brazil. This is the first report of a severe attack of Teleonemia morio (Stål, 1855 (Hemiptera, Heteroptera, Tingidae on Annona squamosa L. (custard apple, causing up to 80% of losses of infested trees. In order to facilitate the identification of this insect pest, the adult female of T. morio is redescribed based on specimens collected in Palmeira dos Índios, Alagoas, Brazil.

Identification of a new species of Aphis (Hemiptera: Aphididae) based on distinct morphology

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Aphis elena Lagos-Kutz and Voegtlin, sp. nov. (Hemiptera: Aphididae), is described from specimens collected in Illinois, USA, on the North American native plant, Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald (Family: Lamiaceae). Both apterous and alate viviparae are desc...

Descriptions of two new species of Sphenorhina (Hemiptera, Cercopidae, Tomaspidinae from the Neotropical region

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Andressa Paladini

2013-06-01

Full Text Available Description of two new species of Sphenorhina (Hemiptera, Cercopidae, Tomaspidinae from the Neotropical region. Two new species of Sphenorhina Amyot & Serville, S. pseudoboliviana SP. NOV: from Bolivia and S. plata SP. NOV: from Argentina are described and illustrated.

Mitochondrial phylogenomics of Hemiptera reveals adaptive innovations driving the diversification of true bugs

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Li, Hu; Leavengood, John M.; Chapman, Eric G.; Burkhardt, Daniel; Song, Fan; Jiang, Pei; Liu, Jinpeng; Cai, Wanzhi

2017-01-01

Hemiptera, the largest non-holometabolous order of insects, represents approximately 7% of metazoan diversity. With extraordinary life histories and highly specialized morphological adaptations, hemipterans have exploited diverse habitats and food sources through approximately 300 Myr of evolution. To elucidate the phylogeny and evolutionary history of Hemiptera, we carried out the most comprehensive mitogenomics analysis on the richest taxon sampling to date covering all the suborders and infraorders, including 34 newly sequenced and 94 published mitogenomes. With optimized branch length and sequence heterogeneity, Bayesian analyses using a site-heterogeneous mixture model resolved the higher-level hemipteran phylogeny as (Sternorrhyncha, (Auchenorrhyncha, (Coleorrhyncha, Heteroptera))). Ancestral character state reconstruction and divergence time estimation suggest that the success of true bugs (Heteroptera) is probably due to angiosperm coevolution, but key adaptive innovations (e.g. prognathous mouthpart, predatory behaviour, and haemelytron) facilitated multiple independent shifts among diverse feeding habits and multiple independent colonizations of aquatic habitats. PMID:28878063

Hemiptera community and species responses to grassland sward islets

OpenAIRE

Helden, Alvin J.; Dittrich, Alex D. K.

2016-01-01

Sward islet is a term that has been used to describe a patch of longer vegetation in a pasture produced by a reduction in cattle grazing around their dung. They are known to affect the abundance and distribution of grassland arthropods. Hemiptera, like other groups, are found in higher densities within islets than the surrounding sward. Does this modify the community composition or is there just a density effect? Evidence from a paired (islets, non-islets) study at an Irish cattle-grazed site...

Morphometrics of the Southern Green Stink Bug [Nezara viridula (L.) (Hemiptera: Pentatomidae)] Stylet Bundle

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The southern green stink bug, Nezara viridula (L.) (Hemiptera: Pentatomidae), is a cosmopolitan pest of high-value cash crops, including cotton (Gossypium hirsutum L.; Malvales: Malvaceae). The pest can ingest and transmit disease-causing bacterial and fungal pathogens of cotton. We hypothesized t...

Fooling the harlequin bug (Hemiptera: Pentatomidae) using synthetic volatiles to alter host plant choice

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Harlequin bug, Murgantia histrionica (Hahn) (Hemiptera: Pentatomidae), is a widespread invasive pest that feeds on a variety of brassicaceous crops and other plants. To understand olfactory cues which mediate host-finding, and possible utility in pest management, we deployed aggregation pheromone (m...

Attraction of stink bug (Hemiptera: Pentatomidae) nymphs to Euschistus aggregation pheromone in the field

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Phytophagous stink bugs (Hemiptera: Pentatomidae) are primary pests in most fruit, vegetable, grain, and row crops worldwide. Pheromones have been identified and synthesized for several species of economically important stink bug pests. When yellow pyramid traps are baited with lures containing thes...

Phylogenetic divergences of the true bugs (Insecta: Hemiptera: Heteroptera), with emphasis on the aquatic lineages

DEFF Research Database (Denmark)

Wang, Yan-hui; Cui, Ying; Rédei, Dávid

2016-01-01

Heteroptera are among the most diverse hemimetabolous insects. Seven infraorders have been recognized within this suborder of Hemiptera. Apart from the well-established sister-group relationship between Cimicomorpha and Pentatomomorpha (= Terheteroptera), the two terminal lineages, the relationsh...

Association of Verde plant bug, Creontiades signatus (Hemiptera: Miridae), with cotton boll rot

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Cotton along the Gulf Coast of south Texas has experienced loss from cotton boll rot especially during the last 10 to 15 years, and stink bugs and plant bugs (Hemiptera: Pentatomidae and Miridae) that feed on cotton bolls have been suspected in introducing the disease. A replicated grower field surv...

Stylet bundle morphology and trophically related enzymes of the hemlock woolly adelgid (Hemiptera: Adelgidae)

Science.gov (United States)

Kelly L.F. Oten; Allen C. Cohen; Fred P. Hain

2014-01-01

The hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), is a pest of eastern and Carolina hemlocks (Tsuga canadensis (L.) Carriere and Tsuga caroliniana Engelmann, respectively) in the eastern United States and has already caused catastrophic changes to eastern forests. As one of the significant...

An overview on the ecology of Triatominae (Hemiptera:Reduviidae).

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Galvão, Cleber; Justi, Silvia A

2015-11-01

Chagas disease, the American trypanosomiasis, is an important neglected tropical illness caused by the flagellate protozoan Trypanosoma cruzi (Kinetoplastida, Trypanosomatidae) and transmitted by insects of the subfamily Triatominae (Hemiptera: Reduviidae). Here we provide an overview on the current knowledge about Triatominae ecology, its association with human, T. cruzi infection and the immediate consequences of habitat fragmentation. We also discuss the geographic distribution of the species and the importance of predicting their distributions to control programs. Copyright © 2015 Elsevier B.V. All rights reserved.

Relative Abundance of Carsonella ruddii (Gamma Proteobacterium) in Females and Males of Cacopsylla pyricola (Hemiptera: Psyllidae) and Bactericera cockerelli (Hemiptera: Triozidae)

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Cooper, W. Rodney; Garczynski, Stephen F.; Horton, David R.

2015-01-01

Carsonella ruddii (Gamma Proteobacterium) is an obligate bacterial endosymbiont of psyllids that produces essential amino acids that are lacking in the insect’s diet. Accurate estimations of Carsonella populations are important to studies of Carsonella-psyllid interactions and to developing ways to target Carsonella for control of psyllid pests including pear psylla, Cacopsylla pyricola (Förster) (Hemiptera: Psyllidae) and potato psyllid, Bactericera cockerelli (Šulc) (Hemiptera: Triozidae). We used two methods, namely fluorescence in situ hybridization and quantitative polymerase chain reaction (qPCR), to estimate relative abundance of Carsonella in bacteriocytes and whole bodies of psyllids, respectively. Using these two methods, we compared Carsonella populations between female and male insects. Estimations using fluorescence in situ hybridization indicated that Carsonella was more abundant in bacteriocytes of female C. pyricola than in those of males, but Carsonella abundance in bacteriocytes did not differ between sexes of B. cockerelli. Analyses by qPCR using whole-body specimens indicated Carsonella was more abundant in females than in males of both psyllids. Neither fluorescence in situ hybridization nor qPCR indicated that Carsonella populations differed in abundance among adults of different ages (0–3 wk after adult eclosion). Using fluorescence in situ hybridization, Carsonella was observed in ovarioles of newly emerged females and formed an aggregation in the posterior end of mature oocytes. Results of our study indicate that female psyllids harbor greater populations of Carsonella than do males and that sex should be controlled for in studies which require estimations of Carsonella populations. PMID:26056318

Allozyme Variation in Hemlock Woolly Adelgid (Hemiptera: Adelgidae) from the United States and China

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V. S& #225; nchez; M.A. Keena; M.A. Keena

2009-01-01

The hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), is a major introduced pest of eastern hemlock, Tsuga canadensis (L.) Carriere. Hemlock woolly adelgid in the United States is anholocyclic and an obligate parthenogen, because no suitable primary host (on which sexual reproduction occurs in Asia) is...

First record of Acizzia jamatonica (Hemiptera: Psyllidae) in North America: friend or foe?

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Michael D. Ulyshen; Douglass Miller

2007-01-01

Acizzia jamatonica (Kuwayama) (Hemiptera: Sternorrhyncha: Psyllidae) is reported for the first time in North America. Because the species is thought to feed exclusively on Albizia, it may prove to be an effective biocontrol agent against the invasive Albizia julibrissin Durazzini in the southeastern United States. Because A. julibrissin is also an ornamental plant of...

Effects of founder population size on the performance of Orius laevigatus (Hemiptera: Anthocoridae) colonies

NARCIS (Netherlands)

Castañe, C.; Bueno, V.H.P.; Carvalho, L.M.; Lenteren, van J.C.

2014-01-01

Orius laevigatus (Hemiptera: Anthocoridae) is a key predator of thrips and is mass reared in large numbers for use in biological control. The aim of this study was to evaluate the effect of founder population size on the biological and behavioral performance of O. laevigatus over time. Laboratory

The genus Alphocoris in the Indomalaya (Hemiptera: Heteroptera: Scutelleridae).

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RÉdei, DÁvid; Tsai, Jing-Fu; Jindra, ZdenĚk

2018-02-21

The Indomalayan species of the genus Alphocoris Germar, 1839 (Hemiptera: Heteroptera: Scutelleridae: Odontotarsinae: Odontotarsini) are revised. Three species, A. caudatus Rédei, Tsai Jindra, sp. nov. (India: Maharashtra), A. naso Rédei Tsai, sp. nov. (India: Goa), and A. asper Rédei, Tsai Jindra, sp. nov. (India: Goa and Maharashtra), are recognized. The type material of A. lixoides Germar, 1839 (type locality: Senegal) is documented; previous records of this species from India and Pakistan are considered as based on misidentifications, the species is restricted to the Afrotropical Region.

Mating disruption of Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae) by playback of vibrational signals in vineyard trellis

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BACKGROUND: Glassy-winged sharpshooter (GWSS), Homalodisca vitripennis (Germar) (Hemiptera: Cicadellidae), is an important vector of the bacterium Xylella fastidiosa, the causal agent of Pierce’s disease of grapevine. Area-wide applications of neonicotinoid insecticides have suppressed GWSS populati...

The cicada genus Karenia Distant, 1888 (Hemiptera: Cicadidae), with description of a new species.

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Pham, Hong-Thai; Constant, Jerome

2014-08-19

The cicadas of the genus Karenia are reviewed, and Karenia tibetensis sp.nov. (Hemiptera: Cicadidae) is described from Tibet, China. Pictures of the male adult and illustrations of the male genitalia are provided. A key to the species of Karenia is presented and the distribution of the Karenia species is discussed.

Cycad Aulacaspis Scale, a Newly Introduced Insect Pest in Indonesia

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RANGASWAMY MUNIAPPAN

2012-09-01

Full Text Available Cycad aulacaspis scale (Aulacaspis yasumatsui Takagi (Hemiptera: Diaspididae is native to Thailand and Vietnam. Since the early 1990s it has been spreading around the world due to the trade in cycad plants for ornamental use. Infestation by this scale can kill cycads in only a few months. Its accidental introduction to Florida endangered the ornamental cycad-growing industry; and in Guam and Taiwan, endemic cycads (Cycas micronesica and C. taitungensis, respectively are currently threatened with extinction by cycad aulacaspis scale. In November 2011, an introduced scale was discovered damaging cycads in the Bogor Botanic Garden. Samples from Bogor were taken for identification of the scale, and the material was kept for some time to rear out any insect parasitoids that were present. Both the scale insects and parasitoids were prepared on microscope slides and studied microscopically for authoritative identification. The scale was confirmed as A. yasumatsui. The parasitoid Arrhenophagus chionaspidis Aurivillius (Hymenoptera: Encyrtidae and the hyperparasitoid Signiphora bifasciata Ashmead (Hymenoptera: Signiphoridae were identified from the samples. Unless immediate remedial measures are taken, several endemic species of cycad in Indonesia may be endangered by infestation by cycad aulacaspis scale.

Field evaluation of potential pheromone lures for Lygus lineolaris (Hemiptera: Miridae) in the Mid-South

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Plant bugs (Hemiptera: Miridae) are phytophagous pests of cultivated plants around the world. In the mid-South region of the United States, Lygus lineolaris is a primary pest of cotton, and causes economic damage. Previously published research about the volatiles produced by members of the genus Lyg...

Two pests overlap: Drosophila suzukii (Diptera: Drosophilidae) use of fruit exposed to Halyomorpha halys (Hemiptera: Pentatomidae)

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Spotted wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae), and brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) are global economic pests. Both pests may co-occur on small fruits, and we investigated whether fruit recently exposed to H. halys woul...

Molecular and morphological identification of the mealybug pest species, Phenacoccus solani Ferris (Hemiptera: Pseudococcidae), in Egypt

Science.gov (United States)

During the summer and autumn of 2016, heavy infestations of the mealybug, Phenacoccus solani Ferris (Hemiptera: Pseudococcidae), were observed on pumpkins, Cucurbita spp. (Cucurbitaceae). This was the first record of the species in Egypt. Several populations have been collected in various pumpkin fr...

Effects of atmospheric pressure trends on calling, mate-seeking, and phototaxis of Diaphorina citri (Hemiptera: Liviidae)

Science.gov (United States)

Insects and other animals sometimes modify behavior in response to changes in atmospheric pressure, an environmental cue that can provide warning of potentially injurious windy and rainy weather. To determine if Diaphorina citri (Hemiptera: Liviidae) calling, mate-seeking, and phototaxis behaviors w...

Two new planthopper species (Hemiptera, Fulgoroidea, Caliscelidae) collected in pitfall traps in Zambia.

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Chmurova, Lucia; Webb, Michael D

2016-08-22

Two new species of planthoppers in the family Caliscelidae (Hemiptera: Fulgoroidea) are described from Zambia, i.e., Afronaso spinosa sp. n. and Calampocus zambiaensis sp. n. All specimens are flightless males and nearly all were collected from baited pitfall traps (except for one specimen collected from a yellow pan trap), suggesting that they live near to or on the ground.

Complete DNA sequence of the mitochondrial genome of the treehopper Leptobelus gazella (Membracoidea: Hemiptera).

Science.gov (United States)

Zhao, Xing; Liang, Ai-Ping

2016-09-01

The first complete DNA sequence of the mitochondrial genome (mitogenome) of Leptobelus gazelle (Membracoidea: Hemiptera) is determined in this study. The circular molecule is 16,007 bp in its full length, which encodes a set of 37 genes, including 13 proteins, 2 ribosomal RNAs, 22 transfer RNAs, and contains an A + T-rich region (CR). The gene numbers, content, and organization of L. gazelle are similar to other typical metazoan mitogenomes. Twelve of the 13 PCGs are initiated with ATR methionine or ATT isoleucine codons, except the atp8 gene that uses the ATC isoleucine as start signal. Ten of the 13 PCGs have complete termination codons, either TAA (nine genes) or TAG (cytb). The remaining 3 PCGs (cox1, cox2 and nad5) have incomplete termination codons T (AA). All of the 22 tRNAs can be folded in the form of a typical clover-leaf structure. The complete mitogenome sequence data of L. gazelle is useful for the phylogenetic and biogeographic studies of the Membracoidea and Hemiptera.

Time course study of feeding damage to pin head cotton squares by Lygus hesperus (Hemiptera: Miridae)

Science.gov (United States)

Lygus hesperus (Hemiptera: Miridae) is an economically important pest affecting cotton crops in California. Lygus feeding causes abscission of cotton squares, with damage severity dependent on size of the square and life stage of the insect. Fifth instar nymphs are the most damaging stage; however, ...

REPRODUÇÃO DE Edessa meditabunda (HEMIPTERA: PENTATOMIDAE EM ALGODOEIRO

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Rosalia Azambuja

2015-05-01

Full Text Available O percevejo-asa-preta-da-soja Edessa meditabunda (Fabricius (Hemiptera: Pentatomidae no final do ciclo da soja dispersa para algodoeiro e utiliza essa planta como hospedeiro alternativo. Visando conhecer o potencial desta espécie como praga em algodoais e auxiliar na tomada decisão quanto ao manejo deste inseto, hipotetizou-se nesse trabalho que o algodoeiro é nutricionalmente adequado para a reprodução e desenvolvimento de E. meditabunda. Os tratamentos testados foram: 1 folhas e maçã de algodoeiro e 2 dieta padrão, recomendada para criação de pentatomídeos fitófagos em laboratório, utilizada como testemunha. As características biológicas avaliadas foram: período de desenvolvimento ninfal, duração de cada ínstar, porcentagem de sobrevivência, peso dos adultos na emergência, longevidade de machos e de fêmeas, período de pré-oviposição e de oviposição, número total de ovos por fêmea e fecundidade das fêmeas. Observou-se que, apesar do prolongamento do período de desenvolvimento ninfal, as ninfas alimentadas com algodoeiro sobreviveram, atingiram a fase adulta e os adultos se reproduziram, o que nos permite sugerir que o algodoeiro seja uma planta nutricionalmente adequada para o desenvolvimento e reprodução de E. meditabunda, permitindo a manutenção do inseto em campo após a colheita da soja.  RESUMO El chinche Edessa meditabunda (Fabricius (Hemiptera: Pentatomidae al final del ciclo de la soja emigra al cultivo de algodón y utiliza esta planta como un huésped alternativo. Con el objetivo de conocer el potencial de esta especie como una plaga en los algodonales y ayudar en la toma de decisiones con respecto al manejo de este insecto, se planteó la hipótesis en este estudio que el algodón y nutritiva, adecuada para la reproducción y el desarrollo de E. meditabunda. Los tratamientos fueron:1 las hojas y el fruto del algodón 2 dieta estándar recomendada para la cría de pentatomidos fitófagos en el

Biology of Leptoypha hospita (Hemiptera: Tingidae), a Potential Biological Control Agent of Chinese Privet

Science.gov (United States)

Yanzhuo Zhang; James L. Hanula; Scott Horn; Kristine Braman; Jianghua Sun

2011-01-01

The biology of Leptoypha hospita Drake et Poor (Hemiptera: Tingidae), a potential biological control agent from China for Chinese privet, Ligustrum sinense Lour., was studied in quarantine in the United States. Both nymphs and adults feed on Chinese privet mesophyll cells that lead to a bleached appearance of leaves and dieback of branch tips. L. hospita has five...

Contributions to the knowledge of Banasa Stål (Hemiptera, Heteroptera, Pentatomidae: Banasa chaca Thomas

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Thereza de Almeida Garbelotto

2011-09-01

Full Text Available Contributions to the knowledge of Banasa Stål (Hemiptera, Heteroptera, Pentatomidae: Banasa chaca Thomas. The male of Banasa chaca Thomas is described with emphasis on external and internal genitalia and the female internal genitalia is described. Banasa chaca is newly recorded from Buenos Aires Province (Argentina.

A NEW SPECIES OF BEAMERANA YOUNG, 1952 (HEMIPTERA: CICADELLIDAE: TYPHLOCYBINAE FROM SOUTHEASTERN BRAZIL

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Luci Boa Nova Coelho

2014-05-01

Full Text Available A new species of the Neotropical leafhopper genus Beamerana Young, 1952 (Hemiptera: Cicadellidae: Typhlocybinae is described and illustrated based on the specimens from Minas Gerais, southeastern Brazil. Beamerana boomerang sp. nov. differs from its congeners by the fore wing venation and the male genitalia. A key to the species of Beamerana is provided. The genus is recorded for Brazil for the first time.

Primeiro registro de ocorrência do parasitóide Brasema sp. (hymenoptera: eupelmidae em ovos de Leptoglossus zonatus (Dallas, 1852 (hemiptera: coreidae no Brasil First record of occurrence of the parasitoid Brasema sp. (hymenoptera: eupelmidae in eggs of Leptoglossus zonatus (Dallas, 1852 (hemiptera: coreidae in Brazil

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Carlos Henrique Marchiori

2002-12-01

Full Text Available Este trabalho registra a primeira ocorrência do parasitóide Brasema sp. (Hymenoptera: Eupelmidae parasitando ovos de Leptoglossus zonatus (Hemiptera: Coreidae em cultivar de milho em Itumbiara, GO. A porcentagem de parasitismo foi de 4,8%. Brasema sp. constitue-se em ectoparasitóide de larvas de coleópteros e de outros hospedeiros no interior de tecidos de plantas.This work reports, for the first time, of parasitoid Brasema sp. (Hymenoptera: Eupelmidae parasitizinf eggs of Leptoglossus zonatus (Hemiptera: Coreidae in maize cultivate in Itumbiara, GO, Brazil. The percentage of parasitizing was 4,8%. Brasema sp. constitutes ectoparasitoid of beetle larvae and other hosts concealed in plant tissue.

First record in Argentina of Drepanosiphum oregonense Granovsky (Hemiptera: Aphididae) found on maples (Sapindaceae)

OpenAIRE

Ortego, Jaime; Olave, Anabel; Mier Durante, Milagros Pilar

2014-01-01

Se informa del hallazgo del áfido Drepanosiphum oregonense Granovsky (Hemiptera: Aphididae) sobre árboles de Acer pseudoplatanus y A. campestre (Sapindaceae) en Argentina lo que constituye el primer registro de la especie y del género Drepanosiphum Koch en Argentina y el segundo en Sudamérica. The finding in Argentina of the aphid Drepanosiphum oregonense on "maple tree" Acer pseudoplatanus ...

Occurrence of lace bug Vatiga illudens and Vatiga manihotae (Hemiptera: Tingidae in Mato Grosso do Sul, midwestern Brazil

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Patrícia P. Bellon

2012-09-01

Full Text Available Nymphs and adults of the lace bug (Hemiptera: Tingidae have been found in cassava crops (Manihot esculenta in Mato Grosso do Sul State, Brazil. The insects were collected in the field and taken to the laboratory where they were identified based on some morphological traits of the species Vatiga manihotae (Drake and V. illudens (Drake, which are first reported in the aforementioned state.Ninfas e adultos do percevejo-de-renda (Hemiptera: Tingidae foram encontrados em lavouras de mandioca (Manihot esculenta no Estado do Mato Grosso do Sul, Brasil. Os insetos foram coletados em campo e levados ao laboratório, onde foram identificados com base em algumas características morfológicas nas espécies Vatiga manihotae (Drake e V. illudens (Drake, os quais são registrados pela primeira vez no Estado mencionado.

Corixidae (Hemiptera, Heteroptera en el lago urbano del parque Tezozomoc, Azcapotzalco, México, D. F.

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G. Contreras-Rivero

2005-01-01

Full Text Available Los estudios ecológicos sobre la familia Corixidae (Hemiptera en México son escasos y fragmentados, por lo que se analiza su variación espacial y temporal en un lago urbano con algunas variables ambientales. Los muestreos se realizaron mensualmente, de julio de 2000 a junio de 2001, ubicando tres estaciones litorales de muestreo; en cada una se determinó: profundidad, transparencia, temperatura, oxígeno, pH, conductividad, dureza y alcalinidad. Los coríxidos se capturaron con red de cuchara de forma rectangular. Se efectuó un análisis de correlación simple entre la abundancia total de los coríxidos y las variables físicas y químicas registradas. Se registraron tres especies: Graptocorixa abdominalis (Say, 1832, con 53% de abundancia; Corisella edulis (Champion, 1901 con 43% y Krizousacorixa femorata (Guérin, 1857 con 1%. De un total de 2423 organismos capturados, la mayor abundancia se registró en marzo, junto con los valores más altos de profundidad y oxígeno. La menor abundancia se presentó en junio, con los valores más bajos de alcalinidad. La correlación de variables y abundancia total fue positiva y significativa con profundidad, oxígeno y conductividad. La Estación I presentó la mayor abundancia de coríxidos y la estación III la menor abundancia. Las variaciones registradas en la abundancia se deben al aporte de agua y a la ubicación de las estaciones de muestreo.

Predation of Apiomerus pilipes (Fabricius (Hemiptera, Reduviidae, Harpactorinae, Apiomerini over Meliponinae bees (Hymenoptera, Apidae, in the State of Amazonas, Brazil

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Alexandre Coletto da Silva

2004-12-01

Full Text Available The present work shows the occurrence of an intense predatory activity on adults working Meliponinae bees (Hymenoptera, Apidae, by Apiomerus pilipes (Fabricius, 1787 (Hemiptera, Reduviidae, Harpactorinae, Apiomerini at a meliponary in the Instituto Nacional de Pesquisas da Amazônia (INPA, Manaus, Amazonas State, Brazil.O presente trabalho registra a ocorrência de intensa atividade predatória de Apiomerus pilipes (Fabricius, 1787 (Hemiptera, Reduviidae, Harpactorini, Apiomerini sobre operárias adultas de meliponíneos (Hymenoptera, Apidae, no meliponário experimental do Instituto Nacional de Pesquisas da Amazônia (INPA, Manaus, Estado do Amazonas, Brasil. O meliponário se encontra num fragmento de vegetação secundária no próprio INPA.

Evaluation of hemlock (Tsuga) species and hybrids for resistance to Adelges tsugae (Hemiptera: Adelgidae) using artificial infestation

Science.gov (United States)

Michael E. Montgomery; S.E. Bentz; Richard T. Olsen

2009-01-01

Hemlock (Tsuga) species and hybrids were evaluated for resistance to the hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae). The adelgid was accidentally introduced from Asia to the eastern United States, where it is causing widespread mortality of the native hemlocks, Tsuga canadensis (L.)...

Pheromone of the banana-spotting bug, amblypelta lutescens lutescens Distant (Hemiptera: Coreidae): identification, synthesis and field bioassay

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The banana spotting bug Amblypelta lutescens lutescens Distant (Hemiptera: Coreidae) is one of the principal pests of tree fruits and nuts across northern and eastern Australia. Apart from damage assessments in orchards, there are currently no other methods for monitoring bug activity to aid manage...

Potential transmission of Pantoea spp. and Serratia marcescens (Enterobacteriales: Enterobacteriaceae) to plants by Lygus hesperus (Hemiptera: Miridae)

Science.gov (United States)

Lygus hesperus Knight (Hemiptera: Miridae) is a key agricultural pest in the western United States. In a recent study, proteins from Pantoea ananatis and Serratia marcescens (Enterobacteriales: Enterobacteriaceae) were identified in diet that was stylet-probed and fed upon by L. hesperus adults. P...

First record of Sesbania punicea (Fabales: Fabaceae) as a host plant for Chinavia hilaris (Hemiptera: Pentatomidae)

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The green stink bug, Chinavia hilaris (Say) (Hemiptera: Pentatomidae), is an economic pest of cotton, Gossypium hirsutum L. Numerous known non-crop hosts of C. hilaris that exist in field edges bordering cotton are sources of this stink bug in this crop. Sesbania punicea plants in a field border su...

Populations of predators and parasitoids of Bemisia tabaci (Hemiptera: Aleyrodidae) after the application of eight biorational insecticides in vegetable crops.

Science.gov (United States)

Simmons, Alvin M; Shaaban, Abd-Rabou

2011-08-01

The sweetpotato whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), is an important pest of vegetables and many other crops worldwide. Eight biorational insecticides (based on oil, plant derivatives, insect growth regulator and fungus) were evaluated in the field for their influence on populations of six natural enemies of B. tabaci. Natural populations of two predators [Chrysoperla carnea Stephen (Neuroptera: Chrysopidae) and Orius spp. (Hemiptera: Anthocoridae)] and two genera of parasitoids [Encarsia spp. and Eretmocerus spp. (Hymenoptera: Aphelinidae)] were evaluated in eggplant (Solanum melongena L.). Also, augmented field populations of three predators [C. carnea, Coccinella undecimpunctata L. (Coleoptera: Coccinellidae) and Macrolophus caliginosus (Wagner) (Hemiptera: Miridae)] were evaluated in cabbage (Brassica oleracea var. capitata L.), cucumber (Cucumis sativus L.) and squash (Cucurbita pepo L.). Regardless of natural enemy or crop, jojoba oil, Biovar and Neemix had the least effect on abundance of the natural enemies in comparison with the other insecticides during a 14 day evaluation period. Conversely, Admiral, KZ oil, Mesrona oil, Mesrona oil + sulfur and natural oil had a high detrimental effect on abundance of the natural enemies. These results demonstrate the differential effects of biorational insecticides for whitefly control on predators and parasitoids in the field. This article is a US Government work and is in the public domain in the USA. Published 2011 by John Wiley & Sons, Ltd.

Comparison of fecundity and survival of hemlock woolly adelgid (Hemiptera: Adelgidae) in northern and southern populations

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Artemis Roehrig; Joseph. Elkinton

2011-01-01

The hemlock woolly adelgid (HWA), Adelges tsugae Annand (Hemiptera: Adelgidae), is an introduced species first reported in the eastern United States in 1951. The infestation has since spread in all directions from its initial sighting in Virginia, to its current range from northern Georgia, to southern Maine, and westward into Tennessee, causing...

Mitigating trans-boundary movement of Bemisia tabaci (Hemiptera: Aleyrodidae) on Mentha sp. by pre-shipping treaments of biopesticides

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Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a major pest of several important crops including vegetables, cereals, fruits, and ornamentals grown worldwide. One important mode of its dispersal is through the trans-boundary movement of infested plant materials. In order to prevent the sprea...

CHEMICAL COMPOSITION AND TOXICITY OF CITRUS ESSENTIAL OILS ON Dysmicoccus brevipes (HEMIPTERA: PSEUDOCOCCIDAE)

OpenAIRE

MARTINS, GISELE DOS SANTOS OLIVEIRA; ZAGO, HUGO BOLSONI; COSTA, ADILSON VIDAL; ARAUJO JUNIOR, LUIS MOREIRA DE; CARVALHO, JOSÉ ROMÁRIO DE

2017-01-01

ABSTRACT The insect Dysmicoccus brevipes (Hemiptera: Pseudococcidae) has been reported as an important pest for several crops, especially coffee. The citrus essential oils can be obtained as by-products of the citrus-processing industry and have been tested as an alternative to control different insect groups. Therefore, the objective of this work was to determine the chemical composition and evaluate the toxicity of commercial sweet orange (Citrus sinensis), bitter orange (Citrus aurantium) ...

Estudios Experimentales 2 Parte: Estudios Cuasi-Experimentales

OpenAIRE

Manterola, Carlos; Otzen, Tamara

2015-01-01

Los estudios experimentales, se caracterizan por la valoración del efecto de una o más intervenciones, habitualmente de forma comparativa con otra intervención, o un placebo; y el carácter prospectivo, de la recolección de datos y seguimiento. Agrupados bajo esta denominación, existe una diversidad de diseños, entre los que se encuentran los estudios cuasi-experimentales (ECE), que se caracterizan especialmente por la ausencia de asignación aleatoria. El objetivo de este manuscrito, es report...

Description of a new coccid (Hemiptera, Coccidae on avocado (Persea americana Mill. from Colombia, South America

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Takumasa Kondo

2010-04-01

Full Text Available A new soft scale insect, Bombacoccus aguacatae Kondo, gen. n. and sp. n. (Hemiptera: Coccidae collected on the branches and twigs of avocado, Persea americana Mill. (Lauraceae in Colombia, is described and illustrated based on the adult female. An updated taxonomic key to closely related genera of the Toumeyella-group is provided.

Asociaciones áfido-parasitoide (Hemiptera: Aphididae; Hymenoptera: Braconidae, Aphidiinae en cultivos hortícolas orgánicos en Los Cardales, Buenos Aires, Argentina Aphid-parasitoid associations (Hemiptera: Aphididae; Hymenoptera: Braconidae, Aphidiinae on organic vegetable crops in Los Cardales, Buenos Aires, Argentina

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Andrea V. Andorno

2007-07-01

Full Text Available Diez especies de áfidos (Hemiptera: Aphididae se hallaron parasitados por siete especies de parasitoides (Hymenoptera: Braconidae, Aphidiinae en cultivos hortícolas orgánicos. Myzus persicae (Sulzer fue el áfido más frecuentemente encontrado sobre una amplia variedad de cultivos, y con mayor diversidad de parasitoides asociados. Aphidius colemani Viereck fue el afidiino más usual, que ataca varias especies de áfidos. Ocho asociaciones tritróficas, involucrando Aphidius matricariae Haliday, han sido registradas por primera vez para la Argentina.Ten aphid species (Hemiptera: Aphididae were found parasitized by seven aphid parasitoid species (Hymenoptera: Braconidae, Aphidiinae on organic vegetable crops. Myzus persicae (Sulzer was the most frequent aphid found on a wide variety of crops, with the largest parasitoid diversity associated. Aphidius colemani Viereck was the most frequent aphidiine attacking several species of aphids. Eight tritrophic associations involving Aphidius matricariae Haliday are reported for the first time for Argentina.

Influence of trap color on collection of the recently introduced Bean Plataspid, Megacopta cribraria (Hemiptera: Plataspidae).

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Scott Horn; James Hanula

2011-01-01

Large numbers of the exotic bean plataspid, Megacopta cribraria (F.) (Hemiptera: Plataspidae). were first collected from several northeast Georgia counties beginning in October 2009 (Suiter and Ames 2009, Statewide Pest Alert). How this insect arrived in the United States and where it came from is still not known. The native range of M. cribraria is reported to be...

Spotted alfalfa aphid, Therioaphis trifolii (Monell) (Hemiptera: Aphididae): Pest on alfalfa in Serbia

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Jovičić, Ivana; Radonjić, Anđa; Petrović-Obradović, Olivera

2017-01-01

Spotted alfalfa aphid Therioaphis trifolii (Monell) (Hemiptera, Aphididae) is one of the most important alfalfa pest on the world. Also, it is the most abundant alfalfa aphid in Serbia. This aphid cause damage to alfalfa directly by feeding and indirectly by vectoring plant-pathogenic viruses. Some notes of morphology, host plants, damage, biology, vector role and distribution of spotted alfalfa aphid are given. Abundance of this aphid on alfalfa, influence of climates changes on its abundanc...

Estudio de las principales plagas de insectos chupadores en áreas verdes urbanas de la ciudad de València

OpenAIRE

CASTRO ARELLANO, EDISON MANUEL

2016-01-01

[ES] Las plagas de insectos chupadores que provocan más daños a las especies vegetales empleadas en áreas verdes urbanas en Valencia son los pulgones (Hemiptera, Aphidoidea) y las psilas (Hemiptera, Psylloidea). Estos insectos provocan daños directos e indirectos en las plantas. Los daños directos son debidos a las picaduras nutricionales que realizan para succionar savia de la planta de la que se alimenta, que provocan un debilitamiento general del árbol afectado. Los daños indirectos se de...

Pengaruh Jenis Mangsa dan Suhu pada Perkembangan Menochilus sexmaculatus Fabricius (Coleoptera: Coccinellidae dan Peranannya dalam Pengendalian Diaphorina citri Kuwayama (Hemiptera: Psyllidae

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Tris Haris Ramadhan

2008-07-01

Full Text Available Diaphorina citri Kuwayama (Hemiptera: Psyllidae is the vector of citrus greening (Huanglongbing bacterium and the most serious impediment to citrus culture. Classical biological control of this psyllid vector should contribute to suppress their population. This research was conducted to determine the performance of Menochilus sexmaculatus Fabricius (Coleoptera: Coccinellidae when they were fed with D. citri. The larval performance index of M. sexmaculatus on D. citri compared with Aphis craccivora Koch (Hemiptera: Aphididae diet was 1.3.M. sexmaculatus fed with D. citri had lower fitness than those fed with A. craccivora as shown by longer larval stadium, lower adult dry weight, less number of egg produced and lower percentage of egg hatched. M. sexmaculatus grew best at the temperature of 27oC. Employing the exclusion procedure under field condition,M. sexmaculatus could reduce the population of D. citri up to 90%. These findings showed that theM. sexmaculatus could be a potential predator in reducing D. citri, particularly when the more preferred prey A. craccivora was not present.   Diaphorina citri Kuwayama (Hemiptera: Psyllidae merupakan kelompok Psyllid yang menularkan penyebab penyakit Huanglongbing yang sangat berbahaya pada tanaman jeruk. Pengendalian hayati klasik telah banyak memberikan kontribusi dalam pengendalian di lapangan. Penelitian ini dilakukan untuk melihat penampilan Menochilus sexmaculatus Fabricius (Coleoptera: Coccinellidae dengan pakan D. citri. Indeks penampilan larva M. sexmaculatus dengan pakan D. citri dibandingkan dengan Aphis craccivora Koch (Hemiptera: Aphididae adalah 1,3. M. sexmaculatus yang diberi pakan D. citri menunjukkan penurunan kebugaran dibandingkan jika diberi pakan A. craccivora seperti yang ditunjukkan dengan stadium larva lebih lama, penurunan berat kering serangga dewasa, telur yang dihasilkan lebih sedikit, dan penurunan jumlah telur yang menetas. Menggunakan metode eksklusi pada kondisi

Host range of the exotic brown marmorated stink bug, Halyomorpha halys, (Hemiptera: Pentatomidae), implications for future distribution

Science.gov (United States)

Gary Bernon; Karen M. Bernhard; Anne L. Nielsen; James F. Stimmel; E. Richard Hoebeke; Maureen E. Carter

2007-01-01

Halyomorpha halys, (Hemiptera: Pentatomidae), is a pest in eastern Asia on soybeans and woody plants, including broadleaved trees and fruit trees. A population was discovered in Allentown, PA in 2001. H. halys is also a nuisance pest as it overwinters in homes and other buildings. Based on earlier reports to the Lehigh County...

Population Dynamics of Empoasca fabae (Hemiptera: Cicadellidae) in Central Iowa Alfalfa Fields

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Weiser Erlandson, L. A.; Obrycki, J. J.

2015-01-01

Adults and nymphs of Empoasca fabae Harris (Hemiptera: Cicadellidae) and adults of predatory species in the families Coccinellidae, Anthocoridae, Nabidae, Chrysopidae, and Hemerobiidae were sampled in Iowa alfalfa fields from June to September in 1999 and 2000. The relationship between each predatory taxa and E. fabae was examined using regression analysis. In 2000, all predators were found to be positively correlated with the presence of E. fabae during all periods sampled and most likely contributed to mortality. Orius insidiosus (Say) (Hemiptera: Anthoridae) was the most numerous insect predatory species; population numbers ranged from 0 to 1 and 0.1 to 3.7 adults per 0.25 m2 in 1999 and 2000, respectively. Partial life tables were constructed for E. fabae nymphs for two alfalfa-growing periods. Nymphs were grouped into three age intervals: first and second, third and fourth, and fifth instars. For the first alfalfa growing period examined, E. fabae nymphal mortality was 70% in 1999 and 49% in 2000. During the last growing period of each season (August–September), total nymphal mortality was relatively low (<25%). Adult E. fabae density ranged from 5.4 to 25.6 and 1.4–9.2 per 0.25 m2 in 1999 and 2000, respectively. E. fabae population peaks were similar for each age interval in all growing periods. This study provides further information on the population dynamics of E. fabae and its relationship with select predatory species in Iowa alfalfa fields. PMID:26320260

Prey suitability and phenology of Leucopis spp. (Diptera: Chamaemyiidae) associated with hemlock woolly adelgid (Hemiptera: Adelgidae) in the Pacific Northwest

Science.gov (United States)

Sarah M. Grubin; Darrell W. Ross; Kimberly F. Wallin

2011-01-01

Leucopis spp. (Diptera: Chamaemyiidae) from the Pacific Northwest previously were identified as potential biological control agents for the hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae), in the eastern United States. We collected Leucopis spp. larvae from A. tsugae...

Monitoring of brown stink bug (Hemiptera: Pentatomidae) population dynamics in corn to predict its abundance using weather data

Science.gov (United States)

The brown stink bug (BSB), Euschistus servus (Say) (Hemiptera: Pentatomidae), is a serious economic pest of corn production in the Southeastern U. S. The BSB population dynamics was monitored for 17 wks from tasseling to pre-harvest of corn plants (i.e., late May to mid-September) using pheromone ...

Identification of a sex pheromone of the chrysanthemum lace bug Corythucha marmorata (Hemiptera: Tingidae)

OpenAIRE

Watanabe, Kisaki; Shimizu, Nobuhiro

2017-01-01

Although the nymphs of Corythucha marmorata form clusters on the undersides of host plant leaves, as frequently observed for Hemiptera, the adults are scattered in the vicinity of the nymph population. By investigating the biological activities of volatile secretions from the adult, we found that the secretions activated male mounting behaviour. A chemical analysis revealed that borneol was a common component of the secretions from both sexes. The absolute configuration of the natural product...

Biological parameters and thermal requirements of the parasitoid Praon volucre (Hymenoptera: Braconidae) with Macrosiphum euphorbiae (Hemiptera: Aphididae) as host

NARCIS (Netherlands)

Conti, De B.F.; Bueno, V.H.P.; Sampaio, M.V.; Lenteren, van J.C.

2011-01-01

The effect of temperature on the biology of Praon volucre (Haliday, 1833) (Hymenoptera: Braconidae) in Macrosiphum euphorbiae (Thomas, 1878) (Hemiptera: Aphididae) hosts was studied and the thermal requirements of the parasitoid were determined. Experiments were carried out at 16, 19, 22, 25, and 28

Brochosome influence on parasitisation efficiency of Homalodisca coagulata (Say) (Hemiptera: Cicadellidae) egg masses by Gonatocerus ashmeadi Girault (Hymenoptera : Mymaridae)

NARCIS (Netherlands)

Velema, H.P.; Hemerik, L.; Hoddle, M.S.; Luck, R.F.

2005-01-01

1. Many cicadellid females in the tribe Proconiini (Hemiptera: Cicadellidae) cover their egg masses with specialised, usually rod-shaped, brochosomes as the eggs are being laid. The brochosomes are produced in Golgi complexes in the Malpighian tubules of Cicadellidae. In contrast to the gravid

Occurrence of the Tamarix Leafhopper, Opsius stactogalus Fieber (Hemiptera: Cicadellidae), in Argentina.

Science.gov (United States)

Virla, Eduardo G; Logarzo, Guillermo A; Paradell, Susana L

2010-01-01

The paleartic tamarix leafhopper, Opsius stactogalus Fieber (Hemiptera: Cicadellidae), can reduce the growth of tamarisk due to the aggregate feeding imposed by their populations. The species was mentioned for Argentina in Metcalf's catalogue (1967) without locality or region reference, and the contributions on Cicadellidae published by many authors after Metcalf omitted this distributional data. Populations of O. stactogalus on Tamarix sp. were found in 12 sites between 28 degrees 48' to 39 degrees 17' S and 64 degrees 06' to 70 degrees 04' W, located in both the Neotropical and Andean biogeographic regions.

A review of Chinese tribe Achilini (Hemiptera: Fulgoromorpha: Achilidae), with descriptions of Paracatonidia webbeda gen. & sp. nov.

Science.gov (United States)

Long, Jian-Kun; Yang, Lin; Chen, Xiang-Sheng

2015-12-02

Planthoppers of the tribe Achilini (Hemiptera: Fulgoromorpha: Achilidae) from China, are reviewed. A key to the three genera of Chinese Achilini is given. A new genus and species of the tribe from southwestern China: Paracatonidia webbeda gen. & sp. nov., is described. A new genus and species record for China, Cixidia kasparyani Anufriev, is also given.

Complex of primary and secondary parasitoids (Hymenoptera: Encyrtidae and Signiphoridae) of Hypogeoccoccus spp. mealybugs (Hemiptera: Pseudococcidae) in the New World

Science.gov (United States)

Parasitoids, both primary and secondary (hyperparasitoids), of Hypogeococcus spp. mealybugs (Hemiptera: Pseudococcidae) are reviewed to report results of the surveys in the New World conducted during 2009–2017 for perspective natural enemies of the Harrisia cactus mealybug, Hypogeococcus sp., which ...

Population fluctuation of Empoasca sp. (Hemiptera: Cicadellidae in a physic nut crop in Mato Grosso do Sul

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Denisar Paggioli de Carvalho

2016-01-01

Full Text Available Physic nut (Jatropha curcas L. is an oilseed, semi-evergreen shrub or small tree of the Euphorbiaceae family, whose seeds contain oil that can be processed into a high quality biofuel. However, there have been reports of arthropods feeding from its leaves, including the green leafhopper Empoasca sp. (Hemiptera: Cicadellidae. The large numbers of this insect, observed in certain periods of the year in many regions of Brazil, are causing damage to the oilseed crops. This study aims at evaluating the fluctuation in green leafhopper population in a physic nut crop in Dourados, Mato Grosso do Sul, to assess possible correlations with rainfall, maximum, average and minimum temperatures. This evaluation was conducted between March 2011 and July 2012. The largest Empoasca sp. populations were recorded in May and June, 2011, and between February and May, 2012. No significant correlation was observed between the weather parameters analyzed and the fluctuation in the Hemiptera population, but there was a trend toward higher population density during the warmer and rainier months.

Effects of fertilization of four hemlock species on Adelges tsugae (Hemiptera: Adelgidae) growth and feeding preference of predators.

Science.gov (United States)

S.V. Joseph; James Hanula

2011-01-01

Understanding how fertilization affects host resistance to hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera:Adelgidae), is important because fertilizers are often used to grow resistant selections to a suitable size for testing. We evaluated four hemlock species (Tsuga) under three different fertilizer regimes to assess whether fertility affected resistance to...

A new species of Tamarixia Mercet (Hymenoptera, Eulophidae, parasitoid of Trioza aguacate Hollis & Martin (Hemiptera, Triozidae in Mexico

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Zoya Yefremova

2014-01-01

Full Text Available Tamarixia aguacatensis Yefremova, sp. n. (Hymenoptera: Eulophidae: Tetrastichinae is described from Mexico as a parasitoid of the avocado psyllid, Trioza aguacate Hollis & Martin (Hemiptera: Triozidae. Trioza aguacate is a serious pest of avocado, Persea americana Miller. A key to the species of Tamarixia Mercet in Mexico is given.

Limited predation potential by adult and larval lady beetles (Coleoptera: Coccinellidae) on Nezara viridula (Hemiptera: Pentatomidae) eggs and nymphs

Science.gov (United States)

The Coccinellidae (Coleoptera) co-occur in many habitats with many arthropods that are of suitable size as prey. The Pentatomidae (Hemiptera) are one such group of insects with eggs and early instars that could be susceptible to predation by Coccinellidae. The objective of this laboratory study wa...

Rapid Communication. Tamarixia monesus (Walker (Hym.: Eulophidae parasitoid of Bactericera tremblayi (Wagner, 1961 (Hemiptera: Triozidae in Iran

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Lotfalizadeh Hossein

2016-08-01

Full Text Available Bactericera tremblayi (Wagner, 1961 (Hemiptera: Triozidae is reported on Brassica oleracea var. capitata (Brassicaceae in northwestern Iran. Tamarixia monesus (Walker (Hymenoptera: Chalcidoidea, Eulophidae was reared for the first time on B. tremblayi, and compared with Tamarixia tremblayi, another parasitoid of B. tremblayi. This is a new record of T. monesus from the Middle East.

An unusual new species of Hallodapomimus Herczek, 2000 from the Eocene Baltic amber (Hemiptera, Heteroptera, Miridae, Phylinae

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Aleksander Herczek

2015-03-01

Full Text Available Hallodapomimus antennatus sp. n. (Hemiptera: Heteroptera, Miridae, Phylinae, Hallodapini is described from a macropterous female found in Eocene Baltic amber. The new species can be recognized readily from the other species of the genus, mainly due to its unusual second antennal segment. A key for the identification of all known fossil Hallodapini is presented.

Portanus Ball: descrição de uma espécie nova (Hemiptera, Cicadellidae, Xestocephalinae

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Adenomar Neves de Carvalho

2004-01-01

Full Text Available Portanus dubius sp. nov. é descrita e ilustrada a partir de espécimens que foram coletados com armadilha Malaise durante um levantamento entomológico no Estado do Paraná, Brasil (PROFAUPAR.Portanus Ball: description of a new species (Hemiptera, Cicadellidae, Xestocephalinae. Portanus dubius sp. nov. is described and illustrated. The specimens were collected with Malaise trap during an entomological inventory in Paraná State, Brazil (PROFAUPAR.

Thlastocoris laetus Mayr, 1866 (hemiptera: coreidae: acanthocerini) nueva plaga de la piña

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Couturier,G.; Brailovsky,H.; Zucchi,R.A.

1993-01-01

Thlastocoris laetus (Hemiptera: Coreidae) es por primera vez señalado como plaga de la piña para la Amazonia brasileña y peruana comentando los daños que ocasiona. Se presenta la caracterización morfológica de esta especie, comparandola con Lybindus dichrous que también es reconocido como plaga de la piña en el Brasil. La distribución geográfica de ambas especies es citada.

First report of Idiopterus nephrelepidis Davis, 1909 (Hemiptera: Aphididae from Bulgaria

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Elena Tasheva-Terzieva

2011-11-01

Full Text Available Idiopterus nephrelepidis (Hemiptera: Aphididae is reported for the first time in Bulgaria on ornamental ferns in four greenhouses in Sofia and Varna. Dense colonies of apterous viviparous females and larvae were observed. The established host plants are Nephrolepis exaltata, Asplenium nidus and Pteris cretica. Infested ferns exhibit leaf deformation. The aphids were reared in laboratory conditions for four months. A morphometric study of apterae was carried out. Taking into account the presence of host plants of I. nephrelepidis in Bulgaria which are native to the local flora and the reports of the aphid from the Balkan area, it may spread in the country outdoors.

Flight Muscle Dimorphism and Heterogeneity in Flight Initiation of Field-Collected Triatoma infestans (Hemiptera: Reduviidae)

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Gurevitz, Juan M.; Kitron, Uriel; Gürtler, Ricardo E.

2007-01-01

Recent experiments demonstrated that most field-collected Triatoma infestans (Klug) (Hemiptera: Reduviidae) adults from northern Argentina either never initiated flight or did so repeatedly in both sexes. This pattern could not be explained by sex, adult age, weight, weight-to-length ratio (W/L), or chance. We examined whether bugs that never initiated flight possessed developed flight muscles, and whether flight muscle mass relative to total body mass (FMR) was related to the probability of ...

A new species in the genus Crisicoccus Ferris (Hemiptera: Coccomorpha: Pseudococcidae), with a key to Chinese species.

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Zhang, Jiang-Tao; Wu, San-An

2016-06-01

A new mealybug, Crisicoccus ziziphus sp. nov. (Hemiptera: Coccomorpha: Pseudococcidae), collected on the leaves and twigs of Ziziphus jujuba (Rhamnaceae), is described from China. All the female developmental stages (adult, third-instar, second-instar and first-instar nymphs) are described and illustrated. Keys are provided to separate the female instars and to identify adult females of Crisicoccus species from China.

Review of the genus Neotetricodes Zhang et Chen (Hemiptera: Fulgoromorpha: Issidae) with description of two new species.

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Chang, Zhi-Min; Yang, Lin; Zhang, Zheng-Guang; Chen, Xiang-Sheng

2015-12-11

Two new species of the issid genus Neotetricodes Zhang et Chen (Hemiptera: Fulgoromorpha: Issidae): Neotetricodes longispinus Chang et Chen sp. nov. (China: Yunnan) and Neotetricodes xiphoideus Chang et Chen sp. nov. (China: Yunnan) are described and illustrated. The generic characteristic is redefined. A checklist and key to the species of the genus are provided. The female genitalia of the genus are firstly described.

Rearing and Release of Megamelus scutellaris Berg (Hemiptera: Delphacidae) for Biological Control of Water hyacinth in 2015

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2017-06-01

Hemiptera: Delphacidae) for Biological Control of Waterhyacinth in 2015 by Jan Freedman and Nathan Harms PURPOSE: Waterhyacinth biological control ... control agents. Three insects were released in the United States for biological control of waterhyacinth during the 1970s; two weevils, Neochetina...content) and competitive interactions with other biological control agents (e.g., Neochetina spp.), though their consideration in other biological

Occurrence of the Tamarix Leafhopper, Opsius stactogalus Fieber (Hemiptera: Cicadellidae), in Argentina

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Virla, Eduardo G.; Logarzo, Guillermo A.; Paradell, Susana L.

2010-01-01

The paleartic tamarix leafhopper, Opsius stactogalus Fieber (Hemiptera: Cicadellidae), can reduce the growth of tamarisk due to the aggregate feeding imposed by their populations. The species was mentioned for Argentina in Metcalf's catalogue (1967) without locality or region reference, and the contributions on Cicadellidae published by many authors after Metcalf omitted this distributional data. Populations of O. stactogalus on Tamarix sp. were found in 12 sites between 28° 48′ to 39° 17′ S and 64° 06′ to 70° 04′ W, located in both the Neotropical and Andean biogeographic regions. PMID:20578887

PRIMER REPORTE DE LA PRESENCIA DE Diaphorina citri (HEMIPTERA: LIVIIDAE EN MANABÍ

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José Bernardo Navarrete Cedeño

2016-12-01

Full Text Available Diaphorina citri (Hemiptera: Liviidae, conocido como el psílido asiático de los cítricos, es considerada una plaga clave de la citricultura mundial, debido a que es vector de la bacteria “Candidatus Liberibacter”, agente causal de la enfermedad “Huanglongbing”, que tiene efectos letales sobre vegetales dentro de la familia Rutaceae. En este documento se reporta la presencia de D. citri infestando Murraya spp., un arbusto de la familia Rutaceae, en la zona urbana del cantón Portoviejo. Este es el primer reporte de la plaga en la provincia de Manabí-Ecuador

Dopluise (Hemiptera: Coccoidea geassosieer met die wipstertmier, Crematogaster peringueyi Emery (Hymenoptera: Formicidae

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Johannes H. Giliomee

2015-02-01

Full Text Available Neste van die wipstertmier, Crematogaster peringueyi (Hymenoptera: Formicidae, is op verskeie plekke langs die kus van die Wes-Kaap versamel. Die doel was om vas te stel watter dopluisagtiges (Hemiptera: Coccoidea in die neste in assosiasie met hierdie miere leef. Dopluise van drie families, naamlik die Pseudococcidae (witluise, Coccidae (sagtedopluise en Kerriidae (lakdopluise is in die neste gevind, almal bekend daarvoor dat hulle heuningdou afskei. Hierdie mutualistiese verhouding tussen die miere en dopluise, bekend as mirmekofilie, is fakultatief van aard. Die wipstertmier blyk ook nie spesifiek te wees wat betref die plant waarop hulle nes maak nie.

Description of a new genus, Galgoria gen. nov. (Hemiptera: Cicadidae: Cicadinae: Leptopsaltriini: Leptopsaltriina).

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Lee, Young June

2016-05-10

A new cicada genus, Galgoria gen. nov., is described with Tanna herzbergi Schmidt, 1932 (from southern China) as its type species, which is placed in the subtribe Leptopsaltriina Moulton, 1923 of the tribe Leptopsaltriini Moulton, 1923 in the subfamily Cicadinae Latreille, 1802 (Hemiptera: Cicadidae). Tanna herzbergi Schmidt, 1932 is transferred from Tanna Distant, 1905 to Galgoria gen. nov. to become Galgoria herzbergi (Schmidt, 1932) comb. nov. Tanna apicalis Chen, 1940 syn. nov. and Tanna pseudocalis Lei & Chou, 1997 syn. nov. are synonymized here with Galgoria herzbergi (Schmidt, 1932) comb. nov.

ESTUDIOS TRANSCULTURALES DEL BURNOUT: LOS ESTUDIOS TRANSCULTURALES BRASIL-ESPAÑA

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Macarena Gálvez Herrer

2003-07-01

Full Text Available Los estudios transculturales no son un ejercicio secundario y complementario en el estudio de la psicología; un modelo antropológico de la conducta humana obliga a plantear que las variables culturales no son secundarias sino primarias. Por estas razones el estudio del “burnout†o desgaste profesional puede profundizarse mediante la utilización de los métodos transculturales. No es suficiente con la simple comparación de resultados, sino que es necesario buscar instrumentos propios de cada cultura y establecer la comparación no sólo del síndrome de desgaste profesional sino de todos los diferentes elementos del proceso. El trabajo presentado establece las bases teóricas de este planteamiento, y expone, mediante un ejemplo, algunas de las vías posibles para una psicología transcultural del burnout.

Scale Insects (Hemiptera: Coccoidea) on Myrciaria dubia (Myrtaceae) in Brazil.

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Wolff, V R S; Kondo, T; Peronti, A L B G; Noronha, A C S

2016-06-01

Commercial cultivation of the fruit tree Myrciaria dubia (Myrtaceae) is being developed in Brazil but phytophagous insects, including scale insects (Hemiptera: Coccoidea), can become pests in plantations. The coccids Ceroplastes jamaicensis White, Coccus viridis (Green), Parasaissetia nigra (Nietner), Pseudokermes vitreus (Cockerell) (Coccidae), and the diaspidid Pseudaonidia trilobitiformis (Green) were collected on M. dubia in the municipality of Belém and Tomé-Açu, state of Pará (PA), metropolitan and Northeast Pará mesoregions, Brazil. A key to species of Coccoidea recorded on M. dubia, based on adult females, is provided. Photographs for all scale insects reported on M. dubia are provided. Ceroplastes jamaicensis is recorded for the first time for Brazil and is herein reported for the first time associated with this host.

Estudios sobre postmodernidad y estudios culturales: ¿sinónimos?

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Dr. Roberto A. Follari

2000-01-01

Full Text Available La postmodernidad exige para ser comprendida una dimensión sociohistórica y otra filosófica que le resulta irrenunciables. También hay una serie de fenómenos propiamente culturales, que son los que los denominados "estudios culturales" (G. Canclini. M. Barbero, etc. han asumido en Latinoamérica. Tales estudios han aportado una descripción de fenómenos nuevos, que no son analizados por ningún otro discurso teórico (tribus urbanas, identidades lábiles, influencia de los medios en los nuevos estilos de consumo, etc.. Con ello se da cuenta de parte de la cuestión postmodernidad, pero sin dudase deja fuera otras: lo filosófico y aún lo social y lo político quedan fuera de esa especie de antropología del presente. Por lo tanto, un enfoque integral de lo postmoderno incluye los estudios culturales, pero está lejos de limitarse a ellos.

New corological and biological data of the Red Gum Lerp Psyllid, Glycaspis brimblecombei Moore, 1964 in Italy (Hemiptera, Psyllidae

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Ricardo Jiménez-Peydró

2011-03-01

Full Text Available Glycaspis brimblecombei Moore, 1964 is a psyllid (Hemiptera: Psyllidae pest of Eucalyptus, native toAustralia and first recorded in Europe: Spain in 2008 and more recently (2010 in Italy. The present paper dealswith recent research, carried out in central Italy, with new data on the distribution and biology of this species.

Embryology of Triatoma infestans (KLUG, (Hemiptera, Reduviidae, a Chagas' disease vector Embriología del Triatoma infestans, vector de la enfermedad de Chagas

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Laura E. Fichera

1992-06-01

Full Text Available This study reports the embryogenesis of T. infestans (Hemiptera, Reduviidae. Morphological parameters of growth sequences from oviposition until hatching (12-14 d 28ºC were established. Five periods, as percent of time of development (TD, were characterized from oviposition until hatching. The most important morphological features were: 1 formation of blastoderm within 7% of TD; 2 germ band and gastrulation within 30% of TD; 3 nerve cord, limb budding, thoracic and abdominal segmentation and formation of body cavity within 50% of TD; 4 nervous system and blastokinesis end, and development of embryonic cuticle within 65% of TD; 5 differentiation of the mouth parts, fat body, and Malphigian tubules during final stage and completion of embryo at day 12 to day 14 around hatching. These signals were chosen as appropriate morphological parameters which should enable the evaluation of embryologic modifications due to the action/s of different insecticidesEn este estudio se caracterizó el desarrollo embrionario del T. infestans (Hemiptera Reduviidae. Se establecieron parámetros morfológicos secuenciales de crecimiento desde la oviposición hasta la eclosión, (12-14 d 28ºC. Cinco períodos de crecimiento fueron determinados y expresados como fracciones porcentuales del tiempo total del desarrollo (TD hasta la eclosión. Los eventos morfológicos mas importantes fueron: 1 La formación del blastodermo hasta el 7% del TD; 2 La aparición de la banda germinativa y su gastrulación transcurridos un 30% del TD; 3 El comienzo de la formación del cordón nervioso, de las extremidades, la segmentación torácica y abdominal y la formación del mixocele cuando la embriogénesis alcanzó el 50% del TD; 4 La terminación de la blastoquinesis, el desarrollo completo del sistema nervioso y la aparición de la cutícula embrionaria hasta el 65% del TD; 5 En la etapa final de la embriogenesis se observó la diferenciación del aparato mandibular, el cuerpo graso

Characterization of a recombinant Cathepsin B-Like cysteine peptidase from Diaphorina citri Kuwayama (Hemiptera: Liviidae): A putative target control of citrus huanglongbing

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Huanglongbing (HLB) is one of the most destructive disease affecting citrus plants. The causal agent is associated with the phloem-limited bacterium Candidatus Liberibacter asiaticus (CLas) spread by the Asian citrus psyllid, Diaphorina citri (Hemiptera: Liviidae). Among the control strategies for H...

Occurrence of lace bug Vatiga illudens and Vatiga manihotae (Hemiptera: Tingidae) in Mato Grosso do Sul, midwestern Brazil.

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Bellon, Patrícia P; Wengrat, Ana P G S; Kassab, Samir O; Pietrowski, Vanda; Loureiro, Elisângela S

2012-09-01

Nymphs and adults of the lace bug (Hemiptera: Tingidae) have been found in cassava crops (Manihot esculenta) in Mato Grosso do Sul State, Brazil. The insects were collected in the field and taken to the laboratory where they were identified based on some morphological traits of the species Vatiga manihotae (Drake) and V. illudens (Drake), which are first reported in the aforementioned state.

Rodolia cardinalis (Mulsant) (Coleoptera: Coccinellidae), a new predator of Crypticerya multicicatrices Kondo and Unruh (Hemiptera: Monophlebidae)

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Pinchao, Ever Camilo; Kondo, Takumasa; González F., Guillermo

2016-01-01

The Colombian fluted scale (CFS), Crypticerya multicicatrices Kondo & Unruh (Hemiptera: Monophlebidae) is a polyphagous scale insect which affects about 100 species of plants. Between 2010–2013, the species was reported as an invasive pest on the islands of San Andres and Old Providence, Colombian territory in the Caribbean sea. Currently, populations of the CFS also have increased in the city of Cali, Valle del Cauca State, mainland Colombia, affecting different host plants, especially l...

PCR-based gut content analysis to detect predation of Eriococcus ironsidei (Hemiptera: Eriococcidae) by Coccinellidae species in macadamia nut orchards in Hawaii

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Macadamia felted coccid, Eriococcus ironsidei (Williams) (Hemiptera: Eriococcidae) was first found infesting macadamia trees in the island of Hawaii in 2005. Macadamia felted coccid infests all above-ground parts of trees to feed and reproduce. Their feeding activity distorts and stunts new growth w...

A new species of Dysmicoccus damaging lavender in French Provence (Hemiptera, Sternorrhyncha, Pseudococcidae).

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Germain, J-F; Matile-Ferrero, D; Kaydan, M B; Malausa, T; Williams, D J

2015-07-01

Une nouvelle espèce de Dysmicoccus nuisible à la lavande en Provence (France) (Hemiptera, Sternorrhyncha, Pseudococcidae). Dysmicoccus lavandulae Germain, Matile-Ferrero & Williams n. sp. est décrite et illustrée. Ses séquences ADN sont présentées. L'espèce vit sur Lavandula x intermedia cultivée pour la production d'essence de lavande en Provence. La liste des espèces de pseudococcines vivant sur les lavandes spontanées en France est dressée. Le statut des 2 genres voisins Trionymus Berg et Dysmicoccus Ferris est discuté.

Estudios transculturales del burnout: Los estudios transculturales Brasil-España

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Bernardo Moreno Jiménez

2003-01-01

Full Text Available Los estudios transculturales no son un ejercicio secundario y complementario en el estudio de la psicología; un modelo antropológico de la conducta humana obliga a plantear que las variables culturales no son secundarias sino primarias. Por estas razones el estudio del “burnout” o desgaste profesional puede profundizarse mediante la utilización de los métodos transculturales. No es suficiente con la simple comparación de resultados, sino que es necesario buscar instrumentos propios de cada cultura y establecer la comparación no sólo del síndrome de desgaste profesional sino de todos los diferentes elementos del proceso. El trabajo presentado establece las bases teóricas de este planteamiento, y expone, mediante un ejemplo, algunas de las vías posibles para una psicología transcultural del burnout

Primer registro de Triatoma infestans (Klug (Hemiptera: Reduviidae asociado a nidos de loros barranqueros (Cyanoliseus patagonus (Aves: Psittacidae

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María L. HERNÁNDEZ

2015-01-01

Full Text Available Triatoma infestans es el vector más importante de la enfermedad de Chagas de la Argentina. Se cita por primera vez la presencia de T. infestans (Klug (Hemiptera: Reduviidae asociado a nidos de loro barranquero Cyanoliseus patagonus (Psittasiformes: Psittacidae construidos en viviendas de adobe abandonadas. Se discuten las posibles implicancias de este hallazgo para la vigilancia entomológica del vector.

Microarray analysis of kiwifruit (Actinidia chinensis bark following challenge by the sucking insect Hemiberlesia lataniae (Hemiptera: Diaspididae

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M. Garry Hill

2016-03-01

Full Text Available Both commercial and experimental genotypes of kiwifruit (Actinidia spp. exhibit large differences in response to insect pests. An understanding of the vine's physiological response to insect feeding and its genetic basis will be important in assisting the development of varieties with acceptable levels of pest resistance. This experiment describes transcriptome changes observed in the bark of kiwifruit 2 and 7 days after the commencement of feeding by the armored scale insect pest, Hemiberlesia lataniae. Using a cDNA microarray consisting of 17,512 unigenes, we measured transcriptome changes and analyzed these into functional ontology categories using MapMan. Results are available in the GEO database GSE73922 and are described fully in Ref. Hill et al. (2015 [1]. After 7 days, transcripts associated with photosynthesis were down-regulated and secondary metabolism was up-regulated. Differential expression of transcripts associated with stress response was consistent with a defense response involving both effector and herbivore-triggered immunities, with predominant involvement of the salicylic acid phytohormonal pathway. This hypothesis was supported by the results of two laboratory experiments. The methods described here could be further adapted and applied to the study of plant responses to a wide range of sessile sucking pests.

Cultivation of Aschersonia placenta Berkeley and Broom and its efficacy for controlling Parlatoria ziziphi (Lucas (Hemiptera: Diaspididae

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Dokgluaymai Homrahud

2016-05-01

Full Text Available The entomopathogenic fungus genus Aschersonia (Deuteromycotina: Hyphomycetes is host specific to some aleyrodids and scale insects. In search of the Thai endemic species, fungus samples were isolated from cadavers of citrus whiteflies (Aleyrodes tabaci Gennadius found in citrus orchards in Trat province, Thailand. After morphological analysis and scanning electron microscopic examination, it was identified as Aschersonia placenta Berkeley and Broom. Seven synthetic media, namely: potato dextrose agar (PDA, PDA with pasteurized milk (Foremost® (PDA + M, Sabouraud dextrose agar with yeast extract (SDAY, SDA with pasteurized milk (Foremost® (SDA + M, corn meal agar (CMA, water agar with juice of eight vegetable species (V8® (WA + V8 and WA were explored as appropriate media for fungal cultivation. SDAY and SDA + M gave the best colony radial growth, producing 2.04 ± 0.13 cm and 2.09 ± 0.10 cm in 21 d, respectively. However, based on the ability of A. placenta to produce conidia, PDA and SDAY which produced 2.59 × 108 conidia/mL and 2.69 × 108 conidia/mL, respectively, were considered as the most suitable media for this fungal species. The efficiency assessment of A. placenta for controlling black parlatoria (Parlatoria ziziphi (Lucas, indicated that a conidial suspension at 1 × 109 conidia/mL gave 23.73% and 27.42% mortality at 14 and 21 d post inoculation, respectively.

Population growth and within-plant distribution of the striped mealybug Ferrisia virgata (Cockerell (Hemiptera, Pseudococcidae on cotton

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Martin D. Oliveira

2014-03-01

Full Text Available Population growth and within-plant distribution of the striped mealybug Ferrisia virgata (Cockerell (Hemiptera, Pseudococcidae on cotton. The striped mealybug, Ferrisia virgata (Cockerell (Hemiptera, Pseudococcidae, is a widely distributed and polyphagous pest species, which naturally occurs on cotton plants in Brazil. This study evaluated the establishment and population growth as well as the within-plant distribution of F. virgata on four cotton cultivars: CNPA 7H (white fibers, BRS Verde, BRS Safira, and BRS Rubi (colored fibers. The experiment was conducted in a complete randomized design with four treatments (cultivars and 18 replications of each. Thus, cotton plants of each cultivar were infested with 100 newly hatched nymphs of F. virgata. The number of adult female mealybugs and the total number of mealybugs per plant were quantified, respectively, at 25 and 50 days after infestation. The developmental and pre-reproductive periods were also determined. Furthermore, we verified the distribution of F. virgata on the plant parts at 25 and 50 days after infestation. Ferrisia virgata showed similar growth of 412-fold in the four cotton cultivars studied. Also, the nymphs were spread on infested leaves; the secondgeneration nymphs were spread and established in all plant parts. Our results characterize F. virgata as having much potential as an important cotton pest in Brazil.

A severity rating system for evaluating stand-level balsam woolly adelgid (Hemiptera: Adelgidae) damage in two Abies species in western North America

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Kathryn H. Hrinkevich; Robert A. Progar; David C. Shaw

2016-01-01

Severity rating systems are fundamental to understanding the impacts of disturbance agents in forest stands. The balsam woolly adelgid (BWA), Adelges piceae (Ratzeburg) (Hemiptera: Adelgidae), is an invasive forest pest in North America that infests and causes mortality in true fir, Abies spp. There is currently no single...

Primeiro Registro de Afídeos (Hemiptera: Aphidoidea) em Carambola (Averrhoa carambola L.) no Brasil

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Cunha, Suzan Beatriz Zambon da; Sousa e Silva, Carlos Roberto

2016-01-01

A carambola (Averrhoa carambola L.) árvore de origem Asiática foi introduzida no Brasil em 1817, desde então vem aumentando sua área de cultivo no país. A planta é atacada por poucos insetos como as moscas e percevejos. Este trabalho relata a presença de Aphis gossypii Glover em A. carambola pela primeira vez no Brasil. First Record of Aphids (Hemiptera: Aphididae) on Starfruit (Averrhoa carambola L.) in Brazil Abstract. The starfruit (Averrhoa carambola L.) has origin Asiatic an...

Four new species of the genus Mongoliana Distant (Hemiptera: Fulgoromorpha: Issidae) from southern China.

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Meng, Rui; Wang, Yinglun; Qin, Daozheng

2016-01-05

Four new species in the planthopper genus Mongoliana Distant from southern China (Hemiptera: Fulgoromorpha: Issidae) are reported. Three of them, M. bistriata sp. nov., M. latistriata sp. nov. and M. albimaculata sp. nov., are described and illustrated; the fourth new one, M. arcuata sp. nov., is briefly described for M. triangularis Chen, Zhang & Chang which was a misidentification of M. triangularis Che, Wang & Chou. M. recurrens (Butler, 1875) is re-described and remarks for its current status is given. A key to all known species of Mongoliana is provided. The distribution and morphological peculiarities of the genus are briefly discussed.

Studies on idiocerine leafhoppers with descriptions of Chinaocerus gen. nov. and three new species from China (Hemiptera: Cicadomorpha: Cicadellidae).

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Dang, Li-Hong; Zhang, Bin; Li, Zi-Zhong

2016-03-08

A new leafhopper genus of the tribe Idiocerini (Hemiptera: Cicadomorpha: Cicadellidae), Chinaocerus, is described from the southwest China together with three new species, C. kangdingensis Zhang & Li sp. nov. (Sichuan Province), C. bispinatus Zhang & Li sp. nov. (Yunnan Province) and C. shii Zhang & Li sp. nov. (Sichuan Province). Descriptions and illustrations of these three new species are provided, and a key for their separation is also given.

Do Scaphoideus titanus (Hemiptera: Cicadellidae) nymphs use vibrational communication?

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Chuche, Julien; Thiéry, Denis; Mazzoni, Valerio

2011-07-01

Small Auchenorrhyncha use substrate-borne vibrations to communicate. Although this behaviour is well known in adult leafhoppers, so far no studies have been published on nymphs. Here we checked the occurrence of vibrational communication in Scaphoideus titanus (Hemiptera: Cicadellidae) nymphs as a possible explanation of their aggregative distributions on host plants. We studied possible vibratory emissions of isolated and grouped nymphs, as well as their behavioural responses to vibration stimuli that simulated presence of conspecifics, to disturbance noise, white noise and predator spiders. None of our synthetic stimuli or pre-recorded substrate vibrations from nymphs elicited specific vibration responses and only those due to grooming or mechanical contacts of the insect with the leaf were recorded. Thus, S. titanus nymphs showed to not use species-specific vibrations neither for intra- nor interspecific communication and also did not produce alarm vibrations when facing potential predators. We conclude that their aggregative behaviour is independent from a vibrational communication.

Inheritance of sterility in Dysdercus koenigii F. (Hemiptera: Pyrrhocoridae)

International Nuclear Information System (INIS)

Harwalkar, M.R.; Rahalkar, G.W.

1979-01-01

It has been suggested that for the control of Lepidopterous populations, release of fully competitive partially sterile males would be more advantageous than the release of completely sterile males. This suggestion is based on the fact, elucidated in many studies, that partially sterilized males mated to normal females produce totally sterile or partially sterile progeny. In Hemiptera too, F 1 progeny of partially sterile males has been shown to inherit sterility. Individual impact of sterility inherited by either sex of the F 1 progeny on population growth has been studied in an hemipteran insect Dysdercus koenigii. A dose of 7 krad induces near-complete sterility in males. When males irradiated with substerilizing doses of 1,2 and 3 krad were crossed with normal females, F 1 progeny of both sexes was partially sterile : the female being more sterile than the males. When the F 1 progeny was intercrossed, there was enhanced reduction in progeny production. (auth.)

A new species of Klabonosa Bouček (Hymenoptera: Pteromalidae) reared from eggs of Endochus sp. (Hemiptera: Reduviidae) from India.

Science.gov (United States)

Gupta, Ankita; Yeshwanth, H M; Sureshan, P M

2018-04-23

The genus Klabonosa Bouček (Hymenoptera: Pteromalidae) is recorded for the first time from the Oriental region, with both sexes of K. indica Gupta, Sureshan Yeshwanth sp. n. reared from eggs of the assassin bug Endochus sp. (Hemiptera: Reduviidae) on Artocarpus heterophyllus Lam. (Moraceae). The male is formally described and illustrated for the first time for the genus.

Use of the entomopathogenic fungi Metarhizium anisopliae, Cordyceps bassiana and Isaria fumosorosea to control Diaphorina citri (Hemiptera: Psylidae) in Persian lime under field conditions

Science.gov (United States)

The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae), is a destructive insect pest in the citriculture, because it is an efficient vector of the proteobacteria, ‘Candidatus Liberibacter asiaticus’ (Las), ‘Ca. L. Africanus’ (Laf), and ‘Ca. L. Americanus’ (Lam). These bacteria c...

A new species in the indigenous New Zealand soft scale insect genus Kalasiris Henderson & Hodgson (Hemiptera: Sternorrhyncha: Coccomorpha: Coccidae) on Gahnia setifolia (Cyperaceae).

Science.gov (United States)

Hodgson, Chris J; Gunawardana, D N; Richmond, J E

2016-03-14

The genus Kalasiris Henderson & Hodgson (Hemiptera: Sternorrhyncha: Coccomorpha: Coccidae) is currently only known from New Zealand. The adult female and pupa of a new species, K. martini Hodgson & Richmond are described and illustrated below and the possible taxonomic relationships of the genus to other New Zealand genera are discussed.

Potential use of the fungus Beauveria bassiana against the western flower thrips Frankliniella occidentalis without reducing the effectiveness of its natural predator Orius sauteri (Hemiptera: Anthocoridae)

Science.gov (United States)

Orius sauteri (Poppius) (Hemiptera: Anthocoridae) is an important predator of western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Orius sauteri would be directly exposed to the entomopathogenic fungus Beauveria bassiana (Bals.) Vuillemin in the field should the fu...

Assessment of Feeding Acceptance and Injury of Kerman Pistachios, Pistacia vera, by Brown Marmorated Stink Bug (Hemiptera: Pentatomidae)

OpenAIRE

Lara, Jesús R; Kamiyama, Matthew T; Hernandez, Gabriel; Nay, Justin; Hoddle, Mark S

2017-01-01

Abstract In the United States, California (CA) is the primary commercial producer of pistachio nuts, Pistacia vera L. (Anacardiaceae). The brown marmorated stink bug (BMSB), Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), an invasive and polyphagous insect pest from Asia, has established in urban areas in several pistachio-growing counties in CA. Breeding BMSB populations have not been detected in commercial pistachio acreage. However, the detection of BMSB in Kern and Fresno counties, ma...

Nano-formulation enhances insecticidal activity of natural pyrethrins against Aphis gossypii (Hemiptera: Aphididae) and retains their harmless effect to non-target predators.

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Papanikolaou, Nikos E; Kalaitzaki, Argyro; Karamaouna, Filitsa; Michaelakis, Antonios; Papadimitriou, Vassiliki; Dourtoglou, Vassilis; Papachristos, Dimitrios P

2018-04-01

The insecticidal activity of a new nano-formulated natural pyrethrin was examined on the cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), and the predators Coccinella septempunctata L. (Coleoptera: Coccinellidae) and Macrolophus pygmaeus Rambur (Hemiptera: Miridae), in respect with the nano-scale potential to create more effective and environmentally responsible pesticides. Pyrethrin was nano-formulated in two water-in-oil micro-emulsions based on safe biocompatible materials, i.e., lemon oil terpenes as dispersant, polysorbates as stabilizers, and mixtures of water with glycerol as the dispersed aqueous phase. Laboratory bioassays showed a superior insecticidal effect of the pyrethrin micro-emulsions compared to two commercial suspension concentrates of natural pyrethrins against the aphid. The nano-formulated pyrethrins were harmless, in terms of caused mortality and survival time, to L3 larvae and four-instar nymphs of the predators C. septempunctata and M. pygmaeus, respectively. We expect that these results can contribute to the application of nano-technology in optimization of pesticide formulation, with further opportunities in the development of effective plant protection products compatible with integrated pest management practices.

Mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking Hibiscus rosa-sinensis L. in Malaysia, with two new country records

Science.gov (United States)

Sartiami, Dewi; Watson, Gillian W.; Mohamad Roff, M. N.; Idris, A. B.

2016-11-01

A survey of mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) attacking the national flower of Malaysia, Hibiscus rosa-sisnensis L. and Hibiscus spp. (Malvaceae) was conducted in Selangor and Kuala Lumpur, Malaysia, from January to March 2016. Adult females were mounted on microscope slides in Canada balsam. The five species identified were Ferrisia dasylirii (Cockerell), Maconellicoccus hirsutus (Green), Paracoccus marginatus Williams and Granara de Willink, Phenacoccus solenopsis (Tinsley) and Pseudococcus jackbeardsleyi Gimpel & Miller. Two of these, the invasive species Ferrisia dasylirii and P. solenopsis were introduced and first recorded in Malaysia.

Mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) with oral rim ducts; description of a new genus and species from Turkey, and discussion of their higher classification within the Pseudococcidae.

Science.gov (United States)

Kaydan, Mehmet Bora; Szita, Éva

2017-02-03

A new monotypic mealybug genus with oral rim ducts, Bromusicoccus Kaydan gen. n. (Hemiptera: Pseudococcidae: Pseudococcinae), is described from Turkey. The higher classification of mealybug genera with oral rim tubular ducts worldwide is discussed and a key is provided to separate them.

Stylet biogenesis in Bactericera cockerelli (Hemiptera: Triozidae).

Science.gov (United States)

Cicero, Joseph M

2017-07-01

The discovery of 'Ca. Liberibacter solanacearum', causal agent of certain solanaceous and apiaceous crop diseases, inside the functional (intrastadial) and pharate stylet anatomy of the potato psyllid prompted elucidation of the mechanism of stylet replacement as a novel exit portal in the transmission pathway. In Hemiptera, presumptive (formative) stylets, secreted during consecutive pharate instars, replace functional stylets lost with the exuviae. In potato psyllids, each functional stylet has a hollow core filled with a cytology that extends out of the core to form a hemispherical aggregate of cells, the 'end-cap', somewhat resembling a golf ball on a tee. A tightly folded mass of extremely thin cells, the 'matrix', occurs inside the end-cap. Micrograph interpretations indicate that during the pharate stage, the end-cap apolyses from the core and 'deconstructs' to release and expand the matrix into a long, coiled tube, the 'atrium'. Cells that were in contact with the inner walls of the functional stylet core maintain their position at the apex of the tube, and secrete a new stylet, apex first, the growing length of which descends into the tube until completed. They then despool from the coils into their functional position as the exuviae is shed. Copyright © 2016 Elsevier Ltd. All rights reserved.

Responses of Neomegalotomus parvus (Hemiptera: Alydidae to color and male-lured traps

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Maurício Ursi Ventura

2004-08-01

Full Text Available In 1998, the relative responses of Neomegalotomus parvus (Westwood (Hemiptera: Alydidae to colors in traps were assessed in the field. Colors were printed in white alkaline paper and covered with transparent plastic. Printed colors were black, green, yellow, red and blue. Treatments also included white paper and aluminum foil. Green traps captured more bugs than the other traps (except yellow. Yellow traps caught significantly more N. parvus males than blue, black and aluminum traps. White, red and blue traps captured significantly more N. parvus males than black traps. In 1999, the same treatments were used and additionally included the factor presence (X absence of males in cages in the traps. Four males were confined in the cages together with pigeon pea seeds and water. Control traps received only pigeon pea seeds and water. No responses were found for color comparisons. Male-lured traps captured significantly more males than control traps.Em 1998, as respostas relativas de Neomegalotomus parvus (Westwood (Hemiptera: Alydidae a cores em armadilhas foram avaliadas no campo. As cores foram impressas (preto, verde, amarelo, vermelho e azul, em papel alcalino branco e coberto com plástico transparente. Também se incluiu papel branco e folha de alumínio, como tratamentos. Armadilhas verdes capturaram mais insetos que outras armadilhas (exceto amarelo. Armadilhas amarelas capturaram significativamente mais machos de N. parvus do que armadilhas azuis, pretas e alumínio. Armadilhas brancas, vermelhas e azuis capturaram significativamente mais machos de N. parvus do que armadilhas pretas. Em 1999, os mesmos tratamentos foram usados e também se incluiu fator presença (X ausência de machos em gaiolas nas armadilhas. Quatro machos foram confinados nas gaiolas junto com sementes de guandu e água. Testemunhas receberam somente sementes de guandu e água. Não foram obtidas respostas significativas à cores. Armadilhas com machos capturaram

Eficacia de acetamiprid, fosmet, clorpirifós y pyriproxyfen sobre ninfas de Diaspidiotus perniciosus (Hemiptera: Diaspididae en manzanas

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LUIS SAZO

2016-01-01

Full Text Available Se estudió el efecto de acetamiprid (Mospilan 20 PS® a 0,5 g/L, fos - met (Imidan 70 WP® a 1 g/L, clorpirifós (Lorsban 75 WG® a 0,8 g/L y pyripro - xyfen (Admiral 10 EC® a 0,6 ml/L, sobre la fijación y desarrollo de ninfas de Dias - pidiotus perniciosus Comstock, “Escama de San José”, en manzanas var. Fuji. La aspersión se realizó en condiciones de campo, en un huerto comercial empleando el equivalente a 2500 L/ha. Se recolectaron seis manzanas por tratamiento a los 0, 5, 10, 15 y 20 días después de la aplicación (DDA, y se infestaron con cien ninfas/manzana en laboratorio, luego el material se mantuvo a 24 ± 1°C, 70% HR y fotoperiodo 16:8, por 20 días hasta su evaluación final. Se utilizó un diseño com - pletamente al azar con cinco tratamientos, seis repeticiones y una manzana como unidad experimental. Se determinó el porcentaje de ninfas fijadas vivas y de ninfas del segundo estadio. Se concluyó que acetamiprid afecta directamente la fijación y el desarrollo posterior durante 20 DDA y clorpirifós, durante 15 DDA. Fosmet re - dujo parcialmente la fijación y desarrollo durante 15 DDA. Pyriproxyfen no impidió significativamente la fijación de ninfas, sin embargo una vez establecidas por un periodo de 20 DDA, limitó su desarrollo.

Biology of Maconellicoccus hirsutus (Hemiptera: Pseudococcidae on Hibiscus rosa-sinensis = Biologia de Maconellicoccus hirsutus (Hemiptera: Pseudococcidae em Hibiscus rosa-sinensis

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Marcelo Negrini

2017-10-01

Full Text Available Maconellicoccus hirsutus Green, 1908 (Hemiptera: Pseudococcidae is an introduced pest that threatens fruit and ornamental plant production in Brazil. Reported in Brazil for the first time in 2010, in the state of Roraima, M. hirsutus, has spread rapidly to other regions of the country. The objective of this study was to investigate the biology of M. hirsutus on Hibiscus rosa-sinensis L. (Malvaceae leaves in laboratory conditions with climatic parameters similar to those of the Brazilian North and Northeast (27 ± 1 °C, 60 ± 10% relative humidity and 12 hours light and 12 hours dark. Eighty M. hirsutus nymphs were individualized on rooted H. rosa-sinensis leaves and their survival, mortality, sex ratio, and egg numbers per female emerged were recorded. Maconellicoccus hirsutus can have up to nine generations per year, taking 6.5 days to double its population size. The female numbers of this pest are about three times higher than those for its male counterparts, with 98 eggs per female and 97% viability. The survival curve of the species is type I, that is, mortality rates are higher in adulthood. Maconellicoccus hirsutus, especially, a pest of fruit trees and ornamental plants, presents great potential for population growth in Brazilian tropical conditions. = Maconellicoccus hirsutus Green, 1908 (Hemiptera: Pseudococcidae é uma praga introduzida que ameaça a produção de frutas e plantas ornamentais no Brasil. Registrada no Brasil pela primeira vez em 2010, no estado de Roraima, M. hirsutus se espalhou rapidamente para outras regiões do país. O objetivo deste estudo foi investigar a biologia de M. hirsutus em folhas de Hibiscus rosa-sinensis L. (Malvaceae, em condições de laboratório com parâmetros climáticos semelhantes aos das regiões Norte e Nordeste do Brasil (27 ± 1 °C, 60 ± 10 % de umidade relativa e 12 h de luz e 12 h de escuro. Oitenta ninfas de M. hirsutus foram individualizadas em folhas enraizadas de H. rosa-sinensis e

Does the aggressiveness of the prey modify the attack behavior of the predator Supputius cincticeps (Stål (Hemiptera, Pentatomidae? A agressividade da presa altera o comportamento de ataque do predador Supputius cincticeps (Stål (Hemiptera, Pentatomidae?

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Rafael Braga da Silva

2012-06-01

Full Text Available Does the aggressiveness of the prey modify the attack behavior of the predator Supputius cincticeps (Stål (Hemiptera, Pentatomidae? The stink bug Supputius cincticeps (Stål (Hemiptera, Pentatomidae is a predator found in several Brazilian regions, which possesses desirable attributes as a natural control agent and in biological control programs. The aim of this study was to test if the attack behavior and predation success of S. cincticeps were affected by prey species. Larvae of Tenebrio molitor (L. (Coleoptera, Tenebrionidae, Spodoptera frugiperda (J. E. Smith (Lepidoptera, Noctuidae, and Thyrinteina arnobia (Stoll (Lepidoptera, Geometridae were offered to S. cincticeps in laboratory bioassays where predatory attack and prey defensive behaviors were observed for 2-hour periods. The attack behavior of S. cincticeps changed with the prey species offered. More than 25% of T. molitor and S. frugiperda larvae were immediately attacked, but T. arnobia was not immediately attacked by S. cincticeps. Successful attack (i.e., successful insertion of the predator stylets into the prey depends on the region of the body attacked, with a greater proportion of successful attacks in the anterior than in the median or posterior regions. Larvae of T. arnobia and S. frugiperda displayed a sequence of abrupt head and body movements in response to S. cincticeps attack. Attempts of predation were more successful on T. molitor and S. frugiperda than on T. arnobia. Information about the differential attack behavior of S. cincticeps on different prey species is important for designing successful biological control programs using this hemipteran predator.A agressividade da presa altera o comportamento de ataque do predador Supputius cincticeps (Stål (Hemiptera, Pentatomidae? O percevejo Supputius cincticeps (Stål (Hemiptera, Pentatomidae é um predador encontrado em várias regiões brasileiras, que possui atributos desejáveis como agente de controle natural ou em

Los estudios culturales en Centroamérica.

OpenAIRE

Fumero, Patricia

2012-01-01

En el presente artículo se considerará el inicio de los estudios culturales en Centroamérica y las diversas corrientes que influyeron en este cambio. Posteriormente, se analizará la problemática que supone el estudio del istmo, en términos de su diversidad y del desarrollo de adecuadas perspectivas comparativas. Por último, se revisarán los avances logrados por los estudios literarios y los desafíos planteados en el futuro inmediato.

Pre shipping dip treatments using soap, natural oils, and Isaria fumosorosea: potential biopesticides for mitigating the spread of whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) invasive insects on ornamental plants

Science.gov (United States)

The whitefly Bemisia tabaci (Hemiptera: Aleyodidae) is an invasive insect pest affecting different crops including vegetables, fruits, cereals, and ornamentals. The efficacy of some products such as commercial soap, natural oils and Preferal® (based on the entomopathogenic fungus Isaria fumosorosea ...

Identification of defensive compounds in metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae)

Energy Technology Data Exchange (ETDEWEB)

Marques, Francisco A.; Wendler, Edison P.; Maia, Beatriz Helena L.N. Sales [Universidade Federal do Parana (UFPR), Curitiba, PR (Brazil). Dept. de Quimica]. E-mail: francisco.marques@pesquisador.cnpq.br; Ventura, Mauricio U.; Arruda-Gatti, Iara Cintra [Universidade Estadual de Londrina (UEL), PR (Brazil). Centro de Ciencias Agrarias. Dept. de Agronomia

2007-07-01

The contents of metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae) were analyzed. Compounds were identified by gas chromatography (GC), coupled GC-mass spectrometry and matching retention indices and mass spectra with those of authentic samples. Tridecane was the major component followed by lesser and approximately equal amounts of (E)-4-oxo-2-hexenal and (E)-2-octenal. Other compounds identified include (E)-2-hexenal, decane, (E)-2-hexenyl acetate, undecane, (E)-4-oxo-2-octenal, dodecane, (E)-2-octenyl acetate, 1-tridecene, tetradecane and pentadecane. (author)

Identification of defensive compounds in metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae)

International Nuclear Information System (INIS)

Marques, Francisco A.; Wendler, Edison P.; Maia, Beatriz Helena L.N. Sales; Ventura, Mauricio U.; Arruda-Gatti, Iara Cintra

2007-01-01

The contents of metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae) were analyzed. Compounds were identified by gas chromatography (GC), coupled GC-mass spectrometry and matching retention indices and mass spectra with those of authentic samples. Tridecane was the major component followed by lesser and approximately equal amounts of (E)-4-oxo-2-hexenal and (E)-2-octenal. Other compounds identified include (E)-2-hexenal, decane, (E)-2-hexenyl acetate, undecane, (E)-4-oxo-2-octenal, dodecane, (E)-2-octenyl acetate, 1-tridecene, tetradecane and pentadecane. (author)

First occurrence of Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) preying on defoliating caterpillars of oil palm in the state of Para, Brazil; Primeira ocorrencia de Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) predando lagartas desfolhadoras do dendezeiro no estado do Para, Brasil

Energy Technology Data Exchange (ETDEWEB)

Ribeiro, Rafael C.; Lemos, Walkymario P.; Muller, Antonio A. [EMBRAPA Amazonia Oriental, Belem, PA (Brazil). Lab. de Entomologia], e-mail: rafaufra@yahoo.com.br, e-mail: wplemos@cpatu.embrapa.br; Muller, Antonio A. [Embrapa Amazonia Oriental, Belem, PA (Brazil). Lab. de Entomologia; Bernardino, Aline S.; Buecke, Joel [Grupo Agropalma S/A., Tailandia, PA (Brazil)

2010-01-15

The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hubner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Para, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. (author)

First Record of Diaphorina citri (Hemiptera: Psyllidae) in Ecuador Infesting Urban Citrus and Orange Jasmine Trees

Science.gov (United States)

Cornejo, J.F.; Chica, E.J.

2014-01-01

Abstract Adults and nymphs of the Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae), were collected in the Guayaquil, Samborondón, and Durán cantons in coastal Ecuador. Psyllids were found in high numbers in citrus ( Citrus spp., Sapindales: Rutaceae) and orange jasmine ( Murraya exotica [L.] Jack, Sapindales: Rutaceae) trees within the Guayaquil-Samborondon-Duran conurbation; however, none was found during scoutings in the main citrus producing areas in coastal Ecuador. To the best of our knowledge, this is the first report of D. citri in Ecuador and the Pacific coastal plain of South America. PMID:25527601

Data on the scale insect (Hemiptera: Coccomorpha) fauna of Greece, with description of two new species.

Science.gov (United States)

Szita, Éva; Fetykó, Kinga Gabriela; Benedicty, Zsuzsanna Konczné; Kozár, Ferenc; Partsinevelos, Georgios; Milonas, Panagiotis; Kaydan, Mehmet Bora

2017-10-09

Surveys of the scale insect (Hemiptera: Coccomorpha) fauna of Greece were carried out in 2013 and 2014. Altogether 93 scale insect species were collected, belonging to 11 families. Thirty-eight species (41%) proved to be new to the Greek fauna, including two species new to science (Anophococcus hellenicus Kaydan & Szita sp. n. (Acanthococcidae) and Iberococcus attikus Szita & Fetykó sp. n. (Pseudococcidae)), and two introduced invasive species (Phenacoccus graminicola Leonardi and Pseudococcus comstocki (Kuwana), both Pseudococcidae). The rest of the species seem to be native to the Greek fauna. The total number of scale insect species recorded from Greece is increased to 253.

Escala de Metas de Estudio para Estudiantes Universitarios

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María Victoria Pérez Villalobos

2009-01-01

Full Text Available Actualmente disponemos de gran cantidad de trabajos que muestran la implicación de las metas de estudio en la motivación por estudiar y aprender. Este trabajo analiza la motivación académica y, especialmente, la variable "metas de estudio". El principal propósito de esta investigación es conocer las características psicométricas de la adaptación de la Escala de Metas de Estudio a la población universitaria chilena. Los participantes son 542 estudiantes chilenos, de distintas facultades universitarias. Los resultados del análisis factorial y de consistencia interna son aceptables en las tres subescalas. Estos resultados fundamentan el uso de la Escala de Metas de Estudio para evaluar la motivación al estudio de alumnas y alumnos universitarios en Chile (CL.

Ocorrência de Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986(Hemiptera: Homoptera, Psyllidae em plantios experimentais de camu-camu Myrciaria dubia (H.B.K. Mc Vaugh em Manaus (Amazonas, Brasil Occurrence of Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986 (Hemiptera: Homoptera, Psyllidae in experimental plantations of camu-camu Myrciaria dubia (H.B.K. Mc Vaugh in Manaus (Amazonas, Brazil

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Márcio Luís Leitão Barbosa

2004-01-01

Full Text Available O cultivo de camu-camu Myrciaria dubia (H.B.K. Mc Vaugh tem apresentado inúmeros problemas fitossanitários, dentre os quais, Tuthillia cognata Hodkinson et al. (Hemiptera: Homoptera, Psyllidae, que constantemente é citada como praga secundária. Os objetivos deste estudo foram determinar o nível e a intensidade de infestação (% por T. cognata e estudar aspectos do ciclo biológico e do comportamento de T. cognata, em plantios experimentais de camu-camu. Foram selecionados, de forma aleatória, 17 e 14 exemplares nos plantios I e II, respectivamente. Para cada uma das variáveis estudadas, foram calculados a média aritmética, o desviopadrão, a variância e a amplitude de variação. Foi verificado um nível de infestação de 82% (plantio I e 57% (plantio II, uma intensidade de infestação de 94% (plantio I e 75% (plantio II e uma média de seis ninfas/folha em cada plantio, o que indica que T. cognata representa uma das pragas-chave dessa cultura. Foram observados adultos de Chrysoperla sp. (Neuroptera: Chrysopidae e ninfas de Reduviidae (Hemiptera: Heteroptera, que podem atuar como prováveis agentes de controle biológico de T. cognata.The cultivation of camu-camu Myrciaria dubia (H.B.K. Mc Vaugh has presented countless phytosanitary problems, among them, Tuthillia cognata Hodkinson et al. (Hemiptera: Homoptera, Psyllidae, which often is noticed as a secondary pest. This study aimed to determine the level and the intensity of infestation (% for T. cognata, as well as to study the biological cycle and behavioural aspects of T. cognata, in experimental plantation of camu-camu. 17 and 14 specimens from plantation I and II, respectively, were randomly selected. The arithmetic average, the standard deviation, the variance and the total amplitude were calculated for each studied variable. A level of infestation of 82% (plantation I and 57% (plantation II, an intensity of infestation of 94% (plantation I and 75% (plantation II and an

DNA Barcodes for Nearctic Auchenorrhyncha (Insecta: Hemiptera)

Science.gov (United States)

Foottit, Robert G.; Maw, Eric; Hebert, P. D. N.

2014-01-01

Background Many studies have shown the suitability of sequence variation in the 5′ region of the mitochondrial cytochrome c oxidase I (COI) gene as a DNA barcode for the identification of species in a wide range of animal groups. We examined 471 species in 147 genera of Hemiptera: Auchenorrhyncha drawn from specimens in the Canadian National Collection of Insects to assess the effectiveness of DNA barcoding in this group. Methodology/Principal Findings Analysis of the COI gene revealed less than 2% intra-specific divergence in 93% of the taxa examined, while minimum interspecific distances exceeded 2% in 70% of congeneric species pairs. Although most species are characterized by a distinct sequence cluster, sequences for members of many groups of closely related species either shared sequences or showed close similarity, with 25% of species separated from their nearest neighbor by less than 1%. Conclusions/Significance This study, although preliminary, provides DNA barcodes for about 8% of the species of this hemipteran suborder found in North America north of Mexico. Barcodes can enable the identification of many species of Auchenorrhyncha, but members of some species groups cannot be discriminated. Future use of DNA barcodes in regulatory, pest management, and environmental applications will be possible as the barcode library for Auchenorrhyncha expands to include more species and broader geographic coverage. PMID:25004106

Morphology of the mouthparts of the spittlebug Philagra albinotata Uhler (Hemiptera: Cercopoidea: Aphrophoridae).

Science.gov (United States)

Wang, Tingting; Pan, Liuxing; Zhang, Yalin; Dai, Wu

2015-03-01

Mouthparts associated with feeding behavior and feeding habits are important sensory and feeding structures in insects. To obtain a better understanding of feeding in Cercopoidea, the morphology of mouthparts of the spittlebug, Philagra albinotata Uhler was examined using scanning electron microscopy. The mouthparts of P. albinotata are of the typical piercing-sucking type found in Hemiptera, comprising a cone-shaped labrum, a tube-like, three-segmented labium with a deep groove on the anterior side, and a stylet fascicle consisting of two mandibular and two maxillary stylets. The mandibles consist of a dorsal smooth region and a ventral serrate region near the apical half of the external convex region, and bear five nodules or teeth on the dorsal external convex region on the distal extremity; these are regarded as unique features that distinguish spittlebugs from other groups of Hemiptera. The externally smooth maxillary stylets, interlocked to form a larger food canal and a smaller salivary canal, are asymmetrical only in the internal position of longitudinal carinae and grooves. One dendritic canal is found in each maxilla and one in each mandible. Two types of sensilla trichodea, three types of sensilla basiconica and groups of multi-peg structures occur in different locations on the labium, specifically the labial tip with two lateral lobes divided into anterior sensory fields with ten small peg sensilla arranged in a 5+4+1 pattern and one big peg sensillum, and posterior sensory fields with four sensilla trichodea. Compared with those of previously studied Auchenorrhyncha, the mouthparts of P. albinotata may be distinguished by the shape of the mandibles, the multi-peg structures and a tooth between the salivary canal and the food canal on the extreme end of the stylets. The mouthpart morphology is illustrated using scanning electron micrographs, and the taxonomic and putative functional significance of the different structures is briefly discussed

Planthopper (Hemiptera: Flatidae) Parasitized by Larval Erythraeid Mite (Trombidiformes: Erythraeidae)—A Description of Two New Species From Western Madagascar

Science.gov (United States)

Mąkol, Joanna; Moniuszko, Hanna; Świerczewski, Dariusz; Stroiński, Adam

2014-01-01

Abstract Descriptions of Dambullaeus adonis Mąkol et Moniuszko sp. nov. (Trombidiformes: Erythraeidae, Callidosomatinae) and Latois nigrolineata Świerczewski et Stroiński sp. nov. (Hemiptera: Fulgoromorpha, Flatidae) from Madagascar are provided. The first host record for ectoparasitic larvae of Dambullaeus Haitlinger, 2001 and the first evidence on host–parasite association between flatid adult and erythraeid larvae are given. Genus Dambullaeus , known exclusively from larvae and now comprising two species of Gondwanan distribution, is critically reappraised. PMID:25434029

Toxicities of Selected Essential Oils, Silicone Oils, and Paraffin Oil against the Common Bed Bug (Hemiptera: Cimicidae).

Science.gov (United States)

Zha, Chen; Wang, Changlu; Li, Andrew

2018-02-09

The common bed bug [Cimex lectularius L. (Hemiptera: Cimicidae)] and tropical bed bug [Cimex hemipterus F. (Hemiptera: Cimicidae)] resurged in the United States and many other countries over the past decades. The need for safe and effective bed bug control products propelled the development of numerous 'green insecticides', mostly with essential oils listed as active ingredients. Various inorganic and organic oils also were used for bed bug management. However, there are no published studies on their toxicities against bed bugs. In this study, we screened 18 essential oils, three silicone oils, and paraffin oil (C5-20 paraffins) for their toxicities against bed bugs. All the oils exhibited insecticidal activity in topical assays. Their toxicities varied significantly; all of the evaluated essential oils were less effective than silicone oils and paraffin oil. The LD50 values of the most effective essential oil (blood orange), paraffin oil, and the most effective silicone oil (dodecamethylpentasiloxane) are 0.184 ± 0.018, 0.069 ± 0.012, and 0.036 ± 0.005 mg per bug, respectively. Direct spray of 1% water solution of 3-[hydroxy (polyethyleneoxy) propyl] heptamethyltrisiloxane, the only silicone oil that mixes well with water, resulted in 92% bed bug mortality after 1 d. Results of this study indicate silicone oils and paraffin oil have the potential to be used as safer alternative bed bug control materials. © The Author(s) 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Casos de Estudio de Distribuciones de Probabilidad para Turismo

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Fernández Morales, Antonio

2016-01-01

Este trabajo propone diversos casos de estudio para el estudio de las distribuciones de probabilidad aplicadas a la investigación y la práctica profesional en el ámbito del turismo. Se afronta el estudio de distribuciones de probabilidad, tanto de variables aleatorias discretas como continuas.

Identifikasi kutukebul (Hemiptera: Aleyrodidae dari beberapa tanaman inang dan perkembangan populasinya

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Purnama Hidayat

2017-02-01

Full Text Available Whiteflies (Hemiptera: Aleyrodidae can cause direct and indirect damages on plants, especially vegetables. There is only limited information regarding taxonomy and population dynamic of whiteflies attacking vegetables in Indonesia. This research is conducted to identify species of whitefly collected from chili pepper, tomato, and soybean, and to study their population dynamic. The information gathered from these studies will be useful to support whitefly management in the field. Based on morphology identification of the puparium collected directly from the host plants, there were four species of whitefly identified from chili pepper, tomato, and soybean in Bogor, Cianjur, and Sukabumi, i.e. Bemisia tabaci, Aleurodicus dispersus, Trialeurodes vaporariorum, and Dialeurodes sp. The presence of B. tabaci on chili pepper and tomato was associated with virus infection that causes yellowing and leaf curl disease. This population of B. tabaci tended to increase along with plant growth and generally reached the highest population when the plant was 60-70 days after planting.

Estudio de la legislación ambiental en licencias de dragados de puertos en Brasil y España. Estudio de caso

OpenAIRE

VIÑES BERNARDO, MARGARITA

2011-01-01

Este TFC consistirá en la realización de un estudio de la legislación ambiental existente en relación al dragado de puertos en Brasil y en España, en el análisis de los procesos de licenciamiento y de la metodología de la monitorización del dragado aplicada en un estudio de caso. Viñes Bernardo, M. (2011). Estudio de la legislación ambiental en licencias de dragados de puertos en Brasil y España. Estudio de caso. http://hdl.handle.net/10251/10344. Archivo delegado

Estudios Experimentales 1 Parte: El Ensayo Clínico

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Manterola, Carlos; Otzen, Tamara

2015-01-01

Los estudios experimentales, se caracterizan por la valoración del efecto de una o más intervenciones, habitualmente de forma comparativa con otra intervención, o un placebo; y el carácter prospectivo, de la recolección de los datos y el seguimiento de los grupos en estudio. Bajo la denominación de estudios experimentales, existe una diversidad de diseños, desde los ensayos clínicos (EC) y sus variantes, hasta los estudios cuasi-experimentales y los experientos naturales. El objetivo de este ...

A two-in-one superhydrophobic and anti-reflective nanodevice in the grey cicada Cicada orni (Hemiptera)

Energy Technology Data Exchange (ETDEWEB)

Dellieu, Louis, E-mail: louis.dellieu@unamur.be; Sarrazin, Michaël, E-mail: michael.sarrazin@unamur.be; Simonis, Priscilla; Deparis, Olivier; Vigneron, Jean Pol [Research Center in Physics of Matter and Radiation (PMR), Department of Physics, University of Namur (FUNDP), 61 rue de Bruxelles, B-5000 Namur (Belgium)

2014-07-14

Two separated levels of functionality are identified in the nanostructure which covers the wings of the grey cicada Cicada orni (Hemiptera). The upper level is responsible for superhydrophobic character of the wing, while the lower level enhances its anti-reflective behavior. Extensive wetting experiments with various chemical species and optical measurements were performed in order to assess the bi-functionality. Scanning electron microscopy imaging was used to identify the nanostructure morphology. Numerical optical simulations and analytical wetting models were used to prove the roles of both levels of the nanostructure. In addition, the complex refractive index of the chitinous material of the wing was determined from measurements.

A two-in-one superhydrophobic and anti-reflective nanodevice in the grey cicada Cicada orni (Hemiptera)

Science.gov (United States)

Dellieu, Louis; Sarrazin, Michaël; Simonis, Priscilla; Deparis, Olivier; Vigneron, Jean Pol

2014-07-01

Two separated levels of functionality are identified in the nanostructure which covers the wings of the grey cicada Cicada orni (Hemiptera). The upper level is responsible for superhydrophobic character of the wing, while the lower level enhances its anti-reflective behavior. Extensive wetting experiments with various chemical species and optical measurements were performed in order to assess the bi-functionality. Scanning electron microscopy imaging was used to identify the nanostructure morphology. Numerical optical simulations and analytical wetting models were used to prove the roles of both levels of the nanostructure. In addition, the complex refractive index of the chitinous material of the wing was determined from measurements.

A two-in-one superhydrophobic and anti-reflective nanodevice in the grey cicada Cicada orni (Hemiptera)

International Nuclear Information System (INIS)

Dellieu, Louis; Sarrazin, Michaël; Simonis, Priscilla; Deparis, Olivier; Vigneron, Jean Pol

2014-01-01

Two separated levels of functionality are identified in the nanostructure which covers the wings of the grey cicada Cicada orni (Hemiptera). The upper level is responsible for superhydrophobic character of the wing, while the lower level enhances its anti-reflective behavior. Extensive wetting experiments with various chemical species and optical measurements were performed in order to assess the bi-functionality. Scanning electron microscopy imaging was used to identify the nanostructure morphology. Numerical optical simulations and analytical wetting models were used to prove the roles of both levels of the nanostructure. In addition, the complex refractive index of the chitinous material of the wing was determined from measurements.

Primer registro de Conidiobolus coronatus (Zygomycetes: Entomophthorales en crías experimentales de dos especies plaga del maíz: Delphacodes kuscheli y D. haywardi (Hemiptera: Delphacidae en la Argentina First record of Conidiobolus coronatus (Zygomycetes: Entomophthorales in experimental breeding of two pest species of corn: Delphacodes kuscheli and D. haywardi Muir (Hemiptera: Delphacidae in Argentine

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A. V. Toledo

Full Text Available Se investigó la ocurrencia natural del hongo entomopatógeno Conidiobolus coronatus (Costantin Batko (Zygomycetes: Entomophthorales en adultos de Delphacodes kuscheli Fennah y D. haywardi Muir (Hemiptera: Delphacidae, criados sobre Hordeum vulgare L. bajo condiciones de invernadero. Los insectos muertos, por una sospechada infección fúngica, fueron recolectados, esterilizados superficialmente, y examinados en el laboratorio. Conidiobolus coronatus fue aislado en cultivos puros, descrito morfológicamente y depositado en colecciones micológicas. Este trabajo presenta el primer registro de C. coronatus contra insectos perjudiciales en la Argentina.The natural occurrence of the entomopathogenic fungus Conidiobolus coronatus (Costantin Batko (Zygomycetes: Entomophthorales in adults of Delphacodes kuscheli Fennah and D. haywardi Muir (Hemiptera: Delphacidae, reared on Hordeum vulgare L. under greenhouse conditions, was investigated. Dead insects, suspected of fungal infection, were collected, surface sterilized, and examined in the laboratory. Conidiobolus coronatus was isolated in pure cultures, described morphologically, and deposited in mycological collections. This paper presents the first record of C. coronatus against harmful insects in Argentina.

Organization of the mitochondrial genomes of whiteflies, aphids, and psyllids (Hemiptera, Sternorrhyncha

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Baumann Paul

2004-08-01

Full Text Available Abstract Background With some exceptions, mitochondria within the class Insecta have the same gene content, and generally, a similar gene order allowing the proposal of an ancestral gene order. The principal exceptions are several orders within the Hemipteroid assemblage including the order Thysanoptera, a sister group of the order Hemiptera. Within the Hemiptera, there are available a number of completely sequenced mitochondrial genomes that have a gene order similar to that of the proposed ancestor. None, however, are available from the suborder Sternorryncha that includes whiteflies, psyllids and aphids. Results We have determined the complete nucleotide sequence of the mitochondrial genomes of six species of whiteflies, one psyllid and one aphid. Two species of whiteflies, one psyllid and one aphid have mitochondrial genomes with a gene order very similar to that of the proposed insect ancestor. The remaining four species of whiteflies had variations in the gene order. In all cases, there was the excision of a DNA fragment encoding for cytochrome oxidase subunit III(COIII-tRNAgly-NADH dehydrogenase subunit 3(ND3-tRNAala-tRNAarg-tRNAasn from the ancestral position between genes for ATP synthase subunit 6 and NADH dehydrogenase subunit 5. Based on the position in which all or part of this fragment was inserted, the mitochondria could be subdivided into four different gene arrangement types. PCR amplification spanning from COIII to genes outside the inserted region and sequence determination of the resulting fragments, indicated that different whitefly species could be placed into one of these arrangement types. A phylogenetic analysis of 19 whitefly species based on genes for mitochondrial cytochrome b, NADH dehydrogenase subunit 1, and 16S ribosomal DNA as well as cospeciating endosymbiont 16S and 23S ribosomal DNA indicated a clustering of species that corresponded to the gene arrangement types. Conclusions In whiteflies, the region of the

Are Phenacoccus solani Ferris and P. defectus Ferris (Hemiptera: Pseudococcidae) distinct species?

Science.gov (United States)

Chatzidimitriou, Evangelia; Simonato, Mauro; Watson, Gillian W; Martinez-Sañudo, Isabel; Tanaka, Hirotaka; Zhao, Jing; Pellizzari, Giuseppina

2016-03-24

Among the Nearctic species of Phenacoccus (Hemiptera: Pseudococcidae), Phenacoccus solani Ferris and P. defectus Ferris are morphologically similar and it can be difficult to separate them on the basis of microscopic morphological characters of the adult female alone. In order to resolve their identity, a canonical variates morphological analysis of 199 specimens from different geographical origins and host plants and a molecular analysis of the COI and 28S genes were performed. The morphological analysis supported synonymy of the two species, as although the type specimens of the "species" are widely separated from each other in the canonical variates plot, they are all part of a continuous range of variation. The molecular analysis showed that P. solani and P. defectus are grouped in the same clade. On the basis of the morphological and molecular analyses, P. defectus is synonymized under the senior name P. solani, syn. n.

Evaluasi Sifat Ovisidal dan Nimfasidal Insektisida Buprofezin 100 g/l terhadap Telur dan Nimfa Wereng Coklat, Nilaparvata lugens (Stal.) (Hemiptera: Delphacidae)

OpenAIRE

BAEHAKI SUHERLAN EFFENDI; EKO HARI ISWANTO; AMIR HAMZAH

2016-01-01

Evaluation of ovicidal and nymphcidal properties of buprofezin 100 g/linsecticide to eggs and nymphs of brown planthopper, Nilaparvata lugens(Stal.) (Hemiptera: Delphacidae). Research was carried out in screen house ofSukamandi, Indonesian Center for Rice Research (ICRR) in the wet season of 2013. Theresearch used randomized block design with 5 doses levels insecticide treatment of buprofezin100 g/l and four replications. The buprofezin treatments were 250, 500, 750, 1000, and 1500ml/ha compa...

Estudio de estabilidad de tabletas de propiltiouracilo 50 mg

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María Olga Valdés Bendoyro

Full Text Available Se desarrolló el estudio de estabilidad de las tabletas de propiltiouracilo 50 mg y se determinó su fecha de vencimiento. Este estudio se realizó por los métodos de vida de estante y de estabilidad acelerada mediante cromatografía líquida de alta eficiencia, validados en el Centro de Investigación y Desarrollo de Medicamentos. El estudio de vida de estante se desarrolló por un periodo de 24 meses a temperatura ambiente; mientras que el estudio de estabilidad acelerada se efectuó sometiendo el producto a la influencia de la luz, la humedad y la temperatura; se realizó el análisis durante 3 meses, para los 2 primeros y durante 6 meses para el estudio de la temperatura. La formulación de propiltiouracilo tabletas 50 mg cumplió con las especificaciones de calidad descritas en la farmacopea. Los resultados del estudio de estabilidad por vida de estante después de transcurridos los 24 meses indicaron que el producto mantenía los parámetros que determinan su calidad durante ese tiempo, y en los estudios acelerados no se observó degradación significativa del producto. Se estableció 2 años como fecha de vencimiento en las condiciones señaladas.

Levantamento da fauna de Triatominae (Hemiptera: Reduviidae em ambiente domiciliar e infecção natural por Trypanosomatidae no Estado de Mato Grosso do Sul Survey of Triatominae (Hemiptera: Reduviidae fauna in domestic environments and natural infection by Trypanosomatidae in the State of Mato Grosso do Sul

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Paulo Silva de Almeida

2008-08-01

Full Text Available Entre 2000 a 2004, foi realizado levantamento da fauna de Triatominae (Hemiptera: Reduviidae e exame de infecção natural por Trypanosomatidae, no Estado de Mato Grosso do Sul. Um total de 13.671 espécimes foram capturados. Na análise faunística das espécies capturadas, Triatoma sordida foi caracterizada como muito abundante, muito freqüente, constante e dominante. Os índices de infecção natural para Trypanosoma cruzi apresentaram os valores de 3,2% para Panstrongylus geniculatus, 0,6% para Rhodnius neglectus e 0,1% para Triatoma sordida, apesar do Estado de Mato Grosso do Sul apresentar-se livre da transmissão vetorial endêmica.Between 2000 and 2004, a survey of Triatominae fauna (Hemiptera: Reduviidae and examination of natural infection caused by Trypanosomatidae in the State of Mato Grosso do Sul, Brazil, was conducted. A total of 13,671 specimens were collected. Through fauna analysis on the insects that were caught, Triatoma sordida was characterized as very abundant, very frequent, constant and dominant. The rates of natural infection with Trypanosoma cruzi were 3.2% for Panstrongylus geniculatus, 0.6% for Rhodnius neglectus and 0.1% for Triatoma sordida. Nevertheless, the State of Mato Grosso do Sul is free from endemic vector transmission.

un estudio comparativo

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Federico Varona

2007-01-01

Full Text Available La comunicación efectiva es uno de los mayores retos que tienen hoy las organizaciones y empresas tanto a nivel nacional como internacional (global. Este artículo presenta los resultados de la investigación realizada por un equipo internacional de investigadores interesados en descubrir y comparar las conductas comunicativas o estilos de comunicación de los empleados finlandeses y mexicanos cuando interactúan con sus superiores. Para ello presentamos: primero, un breve marco teórico del estudio; segundo, la metodología; tercero, los resultados del análisis estadístico comparativo entre los empleados de Finlandia y México; cuarto, las conclusiones generales y su explicación cultural; y quinto, las implicaciones teóricas y prácticas de este estudio con respecto a las competencias comunicativas necesarias para la comunicación efectiva entre empleados y superiores tanto en organizaciones nacionales como internacionales (globales.

Estudio comparativo entre SIG propietario y SIG libre

OpenAIRE

Mesa Díaz, Juan Ramón

2008-01-01

Estudio comparativo entre SIG propietario y SIG libre, focalizado en los casos particulares de Geomedia Pro (SIG Propietario) y gvSIG (SIG Libre). En el estudio se procede a determinar cuáles son los aspectos destacables de un SIG, para poder evaluarlos, posteriormente, en los dos SIG objeto del estudio y obtener una ponderación definitoria de cada SIG. A continuación, algunos de los aspectos evaluados en cada SIG: interoperabilidad, conexión a bases de datos espaciales, aspectos económ...

Insects found in birds' nests from Argentina. Pseudoseisura lophotes Reichenbach, 1853 and Anumbius annumbi (Vieillot, 1817) (Aves: Furnariidae), hosts of Triatoma platensis Neiva, 1913 (Hemiptera: Reduviidae: Triatominae).

Science.gov (United States)

Paola, Turienzo

2014-02-24

The insect fauna of the nests of Pseudoseisura lophotes (Reichenbach, 1853) (Aves: Furnariidae) from Argentina was investigated. A total of 110 species (68 identified to species, 22 identified to genus, 20 identified to family) in 40 families of 10 orders of insects was found in these nests. Triatoma platensis Neiva, 1913 (Hemiptera: Reduviidae) was found again in nests of P. lophotes, corroborating after 73 years the first observations made by Mazza in 1936. The occurrence of the insects in nests of P. lophotes is compared with the previously known insect fauna in nests of A. annumbi, Furnarius rufus (Furnariidae), and Myiopsitta monachus (Psittacidae). The insect fauna in additional nests of Anumbius annumbi from the same and/or different localities is given, and used in comparisons. The first occurrence of Cuterebridae (Diptera) in birds' nests, their pupae as the overwintering stage, and the second simultaneous infestation by two species of Philornis (Diptera: Muscidae) on the same nestlings are presented. Other simultaneous infestations of different hematophagous arthropods (Hemiptera: Cimidae; Reduviidae: Triatominae, and Acari: Argasidae) are remarked and discussed.

ESTUDIOS (INTERCULTURALES EN CLAVE DE-COLONIAL

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Catherine Walsh

2010-01-01

Full Text Available Los «estudios culturales» en América Latina forman parte de una política de nombrar inscrita en legados y cartografiados frecuentemente como totalidad, ocultando o dejando pasar por alto las diferencias a su interior. Este articula examina desde dónde nacen los estudios culturales en América Latina en general y en la Universidad Andina Simón Bolívar en Quito en particular, con qué política de nombramiento, qué proyecto(s y qué bases y perspectivas de conocimiento. Considera qué implica concebir y construir los estudios culturales como proyecto político-intelectual, inter-cultural, inter-epistémico y de orientación de-colonial y los desafíos y obstáculos al respecto, incluyendo dentro de la problemática misma de la «uni»-versidad.

de estudios observacionales

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Erik von Elm

2008-01-01

un documento de explicación y elaboración al que puede accederse libremente en los sitios web de PLoS Medicine, Annals of Internal Medicine y Epidemiology. Esperamos que la declaración STROBE contribuya a mejorar la calidad de la publicación de los estudios observacionales.

A new Anagyrus (Hymenoptera: Encyrtidae) from Argentina, parasitoid of Hypogeococcus sp. (Hemiptera: Pseudococcidae) on Harrisia pomanensis (Cactaceae).

Science.gov (United States)

Triapitsyn, Serguei V; Aguirre, María B; Logarzo, Guillermo A

2016-05-26

A new species of Anagyrus Howard (Hymenoptera: Encyrtidae), A. lapachosus sp. n., is described from Salta Province of Argentina as a parasitoid of Hypogeococcus sp. (Hemiptera: Pseudococcidae) on Harrisia pomanensis cactus (Cactaceae). It is a candidate "new association" biological control agent for quarantine evaluation and possible following introduction to Puerto Rico (USA) against another Hypogeococcus sp., commonly called the Harrisia cactus mealybug and often misidentified as H. pungens Granara de Willink (according to our unpublished data the latter attacks only Amaranthaceae), which devastates or threatens the native cacti there and also in some other Caribbean islands (Triapitsyn, Aguirre et al. 2014; Carrera-Martínez et al. 2015).

Megamelus bellicus (Hemiptera: Delphacidae: immature stages and biology

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Roxana MARIANI

2007-01-01

Full Text Available Se describen e ilustran los estados inmaduros de Megamelus bellicus Remes Lenicov & Sosa (Hemiptera: Delphacidae y se presenta una clave para identificarlos. La descripción de cada estadio se realizó sobre la base de ninfas extraidas 24 horas posteriores a la eclosión, de colonias de laboratorio y criadas sobre trozos de hojas de camalote Eichhornia crassipes (Martius Solms Laubach. Los principales caracteres para distinguir los distintos estadios son: tamaño del cuerpo, color, número de tarsómeros, espinulación de la metatibia y número de dientes del calcar y presencia de sensorios en el pedicelo antenal. Datos biológicos basados en observaciones en el laboratorio y en el campo, muestran que M. bellicus realiza su ciclo biológico exitosamente sobre Pontederiaceae. Los huevos, dispuestos de 1 a 9 por postura, son colocados profundamente en el aerénquima del pecíolo; son más frecuentes de 3-4, menos frecuentes 5, 2 y 6, y raramente 1, 7 y 9. Se registra el porcentaje de parasitoidismo de un Hymenoptera oófilo de la familia Eulophidae, Aprostocetus (Ootetrastichus sp. Debido a que M. bellicus ocupa el mismo hábitat ecológico que M. scutellaris Berg, se resaltan las principales diferencias morfológicas y de comportamiento entre las mismas.

ANÁLISIS DEL CONTRATO DE LECTURA DE DOS PUBLICACIONES PERIÓDICAS DE CIENCIAS SOCIALES DE ARGENTINA: ESTUDIOS. REVISTA DEL CENTRO DE ESTUDIOS AVANZADOS (UNC Y ESTUDIOS SOCIALES (UNL

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Florencia María Páez

2012-01-01

Full Text Available Pretendemos con este trabajo efectuar un análisis del contrato de lectura de dos publicaciones periódicas de Argentina que se inscriben en el campo de estudios de las ciencias sociales. Partimos de las ideas de Eliseo Verón, esbozadas en “Cuando leer es hacer: la enunciación en el discurso de la prensa gráfica” (1984, y realizamos una apropiación de las categorías del autor teniendo en cuenta las particularidades propias de las revistas científicas y el modo de funcionamiento del subcampo de publicaciones de ciencias sociales del país, en íntima relación con los capitales en juego en el campo científico en general. Hemos escogido uno de los últimos números de cada una de las revistas Estudios del Centro de Estudios Avanzados de la UNC, y Estudios Sociales, de la Universidad Nacional del Litoral. Los criterios que fueron atendidos al momento de la elección de estas revistas apuntaron a la factibilidad de efectuar una comparación entre los contratos de lectura de ambas, según la propuesta de Verón en torno a este tipo de análisis. Este estudio nos permite profundizar nuestra comprensión del funcionamiento de la comunicación científica gráfica, puntualmente posibilita conocer las estrategias que las publicaciones despliegan para captar a los académicos (potenciales lectores y autores en las revistas y para convencer de la calidad científica de su trabajo editorial a los encargados de elaborar índices y catálogos de publicación.

Razonamiento covariacional en el estudio de funciones cuadráticas

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Jhony Alexander Villa-Ochoa

2012-10-01

Full Text Available En este artículo se usa el marco conceptual de Carlson et al. (2003 para discutir los resultados de un estudio de caso, el cual describe la forma como un estudiante razona covariacionalmente al enfrentarse a situaciones de variación asociadas a funciones cuadráticas. El estudio se ideó para desarrollar una línea convergente de indagación (Yin, 2009, la cual se centró en las descripciones que el estudiante realizaba a medida que abordaba las situaciones diseñadas para el estudio; dichas descripciones fueron trianguladas con las producciones escritas y los elementos teóricos. Desde las acciones que el estudiante evidenció, se pudo observar que el proceso de razonamiento covariacional no es un proceso lineal pero sí recursivo. Así mismo, este estudio de caso pone en evidencia el hecho de que existen estudiantes que pueden aproximarse a una interpretación variacional de las concavidades de una gráfica, sin que ello exija un estudio previo del cálculo diferencial. Del estudio se desprenden algunas implicaciones tanto para el marco conceptual abordado en este estudio como para el diseño de situaciones orientadas al aula de clase.

El creciente campo de los Estudios Sensoriales

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David Howes

2014-09-01

Full Text Available Este ensayo presenta una breve descripción acerca del giro sensorial en la investigación contemporánea, y propone algunas perspectivas de trabajo para futuras investigaciones. Esta labor no pretende ser exhaustiva y, más bien, busca indicar las principales tendencias en este campo. El ensayo, en su primera parte, ofrece una mirada general sobre la aparición y el desarrollo de la historia y la antropología de los sentidos. En la segunda parte, la atención se concentra en cómo el campo de los estudios sensoriales puede ser, de otro lado, conceptualizado como compuesto de cultura visual, cultura auditiva (o estudios del sonido, cultura del olfato, cultura del gusto y cultura del tacto. Se ofrece una explicación acerca de la génesis de estas divisiones. Posteriormente, se presenta una visión general de algunas cuestiones claves en los estudios sensoriales, como la pregunta por el número de los sentidos y la relación entre orden sensorial y orden social. El ensayo concluye con ocho proposiciones para los estudios sensoriales.

El creciente campo de los Estudios Sensoriales

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David Howes

2014-08-01

Full Text Available Este ensayo presenta una breve descripción acerca del giro sensorial en la investigación contemporánea, y propone algunas perspectivas de trabajo para futurasinvestigaciones. Esta labor no pretende ser exhaustiva y, más bien, busca indicar las principales tendencias en este campo. El ensayo, en su primera parte, ofrece una mirada general sobre la aparición y el desarrollo de la historia y la antropología de los sentidos. En la segunda parte, la atención se concentra en cómo el campo de los estudios sensoriales puede ser, de otro lado, conceptualizado como compuesto de cultura visual, cultura auditiva (o estudios del sonido, cultura del olfato, cultura del gusto y cultura del tacto. Se ofrece una explicación acerca de la génesis de estas divisiones. Posteriormente,se presenta una visión general de algunas cuestiones claves en los estudios sensoriales, como la pregunta por el número de los sentidos y la relación entre orden sensorial y orden social. El ensayo concluye con ocho proposiciones para los estudios sensoriales.

Spectral Detection of Soybean Aphid (Hemiptera: Aphididae) and Confounding Insecticide Effects in Soybean

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Alves, Tavvs Micael

Soybean aphid, Aphis glycines (Hemiptera: Aphididae) is the primary insect pest of soybean in the northcentral United States. Soybean aphid may cause stunted plants, leaf discoloration, plant death, and decrease soybean yield by 40%. Sampling plans have been developed for supporting soybean aphid management. However, growers' perception about time involved in direct insect counts has been contributing to a lower adoption of traditional pest scouting methods and may be associated with the use of prophylactic insecticide applications in soybean. Remote sensing of plant spectral (light-derived) responses to soybean aphid feeding is a promising alternative to estimate injury without direct insect counts and, thus, increase adoption and efficiency of scouting programs. This research explored the use of remote sensing of soybean reflectance for detection of soybean aphids and showed that foliar insecticides may have implications for subsequent use of soybean spectral reflectance for pest detection. (Abstract shortened by ProQuest.).

Efeito de extratos de plantas do Cerrado em Dipetalogaster maxima (Uhler (Hemiptera, Reduviidae Effect of Cerrado plant extracts on Dipetalogaster maxima (Uhler (Hemiptera, Reduviidae

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André A. M. Coelho

2009-01-01

Full Text Available A transmissão da doença de Chagas ocorre, principalmente, por meio de fezes de hemípteros hematófagos (Triatominae, os quais ingerem o Trypanosoma cruzi ao se alimentarem do sangue de pessoas ou outros mamíferos infectados. Para o controle dos triatomíneos, os piretróides são os principais inseticidas utilizados. Entretanto, algumas populações de insetos demonstraram resistência a determinados piretróides, indicando a necessidade do desenvolvimento de novos inseticidas eficazes no controle desses vetores. Assim, foi avaliada a atividade inseticida de 83 extratos vegetais, pertencentes a 35 espécies diferentes, em ninfas do primeiro estádio de Dipetalogaster maxima (Uhler, 1894 (Hemiptera: Reduviidae, triatomíneo encontrado no México. Para o teste tópico, foram aplicados 50 ìg de cada extrato nos tergitos abdominais de dez ninfas, em duplicata. Como controles, foram utilizados insetos tratados com etanol, acetona ou sem nenhum tipo de tratamento. Os triatomíneos foram observados durante 28 dias. Nenhum extrato apresentou atividade inseticida significativa, entretanto, o extrato hexânico do fruto e o etanólico da casca do caule de Simarouba versicolor (Simaroubaceae inibiram a taxa de ecdise em D. maxima (40% e 25%, respectivamente. Sugere-se que estes extratos sejam quimicamente investigados e monitorados por ensaios biológicos a fim de determinar os componentes, para que estes possam ser utilizados como modelos moleculares ou como compostos biorracionais nos programas de controle de insetos.Chagas disease, also known as American Trypanosomiasis, is chiefly transmitted by faeces of haematophagous bugs (Triatominae that ingested Trypanosoma cruzi from blood of infected people or other mammals. Pyrethroids have been the main insecticides used against these insects. However, some populations of insects have shown significant levels of resistance to several pyrethroids, indicating the need of new insecticides for the control of

Population Dynamics and Temperature-Dependent Development of Chrysomphalus aonidum (L.) to Aid Sustainable Pest Management Decisions.

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Campolo, O; Malacrinò, A; Laudani, F; Maione, V; Zappalà, L; Palmeri, V

2014-10-01

The increasing worldwide trades progressively led to decreased impact of natural barriers on wild species movement. The exotic scale Chrysomphalus aonidum (L.) (Hemiptera: Diaspididae), recently reported on citrus in southern Italy, may represent a new threat to Mediterranean citriculture. We studied C. aonidum population dynamics under field conditions and documented its development under various temperatures. To enable describing temperature-dependent development through the use of linear and non-linear models, low temperature thresholds and thermal constants for each developmental stage were estimated. Chrysomphalus aonidum was able to perform four generations on green parts (leaves, sprouts) of citrus trees and three on fruits. In addition, an overall higher population density was observed on samples collected in the southern part of the tree canopy. Temperature had a significant effect on the developmental rate; female needed 625 degree days (DD) to complete its development, while male needed 833 DD. The low threshold temperatures, together with data from population dynamics, demonstrated that C. aonidum is able to overwinter as second instar and as an adult. The results obtained, validated by those collected in the field, revealed few differences between predicted and observed dates of first occurrence of each C. aonidum instar in citrus orchards. Data on C. aonidum phenology and the definition of the thermal parameters (lower and upper threshold temperatures, optimum temperature, and the thermal constant) by non-linear models could allow the estimation of the occurrence in the field of each life stage and would be helpful in developing effective integrated control strategies.

Los estudios longitudinales en la prevención de las enfermedades cardiovasculares

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Ignacio Balaguer Vintró

2004-01-01

Full Text Available Los estudios longitudinales de cohortes bien definidas han contribuido a la identificación de los factores de riesgo de la cardiopatía coronaria y otras complicaciones clínicas de la aterosclerosis. Después de comentar las conclusiones de los estudios de la aterosclerosis experimental y los factores de riesgo sugeridos por el estudio de una serie de infartos de miocardio en adultos jóvenes en comparación con controles apareados, se expone la metodología, el desarrollo y los resultados de los estudios longitudinales realizados en Estados Unidos desde 1949: Twin Cities, Framingham, Pooling Project, Western Collaborative, Puerto Rico, Evans County, NI-HONSAN, San Francisco, Harvard, Bogalusa y CARDIA. Se presta especial atención a las hipótesis propuestas al inicio del estudio de Framingham y a los obstáculos y cambios para continuar el proyecto después de los primeros veinticuatro años. A continuación se expone el Seven Countries Study, ideado y dirigido por Ancel Keys y primer estudio realizado con metodología centralizada en varios países, y los estudios longitudinales realizados en diversos países de Europa: Whitehall, Manresa, París, British Regional, Northwick Park, Caerphilly, Speedwell, PROCAM. Se analiza el papel de los estudios longitudinales en la metodología de los estudios posteriores: hijos e hijas de los participantes en Framingham, estudios longitudinales basados en cuestionarios, estudios de otros posibles factores de riesgo, prevalencia de factores de riesgo en estudios retrospectivos, ensayos de intervención primaria (MRFT, WHO European Collaborative Trial y el de Goteburgo y la participación de los equipos entrenados en el Proyecto MONICA. Se señalan los temas todavía en debate en relación con la metodología y los resultados de los estudios longitudinales: exámenes periódicos de los participantes en las cohortes de los estudios epidemiológicos, cambios en la definición de nuevos casos de accidentes

Three new species of mealybug (Hemiptera, Coccomorpha, Pseudococcidae) on persimmon fruit trees (Diospyros kaki) in southern Brazil.

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Pacheco da Silva, Vitor C; Kaydan, Mehmet Bora; Germain, Jean-François; Malausa, Thibaut; Botton, Marcos

2016-01-01

Brazil has the greatest insect diversity in the world; however, little is known about its scale insect species (Hemiptera: Coccomorpha). Mealybugs (Pseudococcidae) have been found in at least 50% of persimmon orchards Diospyros kaki L. in the southern part of the country. In this study three new mealybug species on persimmon trees located in the Serra Gaúcha Region, RS, Brazil, namely, Anisococcus granarae Pacheco da Silva & Kaydan, sp. n., Ferrisia kaki Kaydan & Pacheco da Silva, sp. n. and Pseudococcus rosangelae Pacheco da Silva & Kaydan, sp. n. are described. In addition, an identification key for the genera occurring on fruit orchards and vineyards in Brazil is provided, together with illustrations and molecular data for the new species.

First occurrence of Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae) preying on defoliating caterpillars of oil palm in the state of Para, Brazil

International Nuclear Information System (INIS)

Ribeiro, Rafael C.; Lemos, Walkymario P.; Muller, Antonio A.

2010-01-01

The oil palm Elaeis guineensis is usually attacked by pests, particularly, defoliating caterpillars. Between 2004 and 2006 a stinkbug predator (Asopinae) was registered preying on caterpillars of Brassolis sophorae L., Opsiphanes invirae Hubner (Lepidoptera: Nymphalidae) and Sibine spp. (Lepidoptera: Limacodidae), reducing their populations in commercial oil palm plantations in the State of Para, Brazil. Specimens of the natural enemy were collected, mounted, and identified as Alcaeorrhynchus grandis (Dallas) (Hemiptera: Pentatomidae), corresponding to the first report of the occurrence of this stinkbug attacking defoliating caterpillars of oil palm in Brazil. (author)

Recursos bibliográgicos sobre los estudios en italiano

OpenAIRE

Caprara, Giovanni

2009-01-01

Este artículo bibliográfico busca ofrecer una visión panorámica actualizada (y representativa) de los Estudios de Traducción en lengua italiana. En ella se clasifican por temas objeto de estudio toda una serie de obras (libros, monografías colectivas, etc.) que inciden sobre el estudio de la Traducción e Interpretación desde la perspectiva de la lengua y la cultura italianas o que, aunque hayan sido realizados por autores extranjeros, su publicación utiliza como lengua vehicular de comunic...

Compuestos volátiles de brotes de limón persa y limón mexicano asociados a síntomas del HLB (Huanglongbing).

OpenAIRE

Mendoza Peña, Estrella

2014-01-01

El Huanglongbing (HLB) es una enfermedad de los cítricos que se caracteriza por causar áreas moteadas en hojas, generar frutos deformes y decolorados, semillas abortivas, causar pérdida paulatina de la producción y provocar que la muerte de los árboles infectados sea inevitable. El agente asociado a esta enfermedad es la bacteria Candidatus Liberibacter ssp., y en México es dispersada por el vector Diaphorina citri Kuwayama (Hemiptera: Liviidae). En el presente estudio, mediante el método de ...

Does the aggressiveness of the prey modify the attack behavior of the predator Supputius cincticeps (Stål (Hemiptera, Pentatomidae?

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Rafael Braga da Silva

2012-06-01

Full Text Available Does the aggressiveness of the prey modify the attack behavior of the predator Supputius cincticeps (Stål (Hemiptera, Pentatomidae? The stink bug Supputius cincticeps (Stål (Hemiptera, Pentatomidae is a predator found in several Brazilian regions, which possesses desirable attributes as a natural control agent and in biological control programs. The aim of this study was to test if the attack behavior and predation success of S. cincticeps were affected by prey species. Larvae of Tenebrio molitor (L. (Coleoptera, Tenebrionidae, Spodoptera frugiperda (J. E. Smith (Lepidoptera, Noctuidae, and Thyrinteina arnobia (Stoll (Lepidoptera, Geometridae were offered to S. cincticeps in laboratory bioassays where predatory attack and prey defensive behaviors were observed for 2-hour periods. The attack behavior of S. cincticeps changed with the prey species offered. More than 25% of T. molitor and S. frugiperda larvae were immediately attacked, but T. arnobia was not immediately attacked by S. cincticeps. Successful attack (i.e., successful insertion of the predator stylets into the prey depends on the region of the body attacked, with a greater proportion of successful attacks in the anterior than in the median or posterior regions. Larvae of T. arnobia and S. frugiperda displayed a sequence of abrupt head and body movements in response to S. cincticeps attack. Attempts of predation were more successful on T. molitor and S. frugiperda than on T. arnobia. Information about the differential attack behavior of S. cincticeps on different prey species is important for designing successful biological control programs using this hemipteran predator.

Probing behaviors of Sitobion avenae (Hemiptera: Aphididae on enhanced UV-B irradiated plants

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Hu Zu-Qing

2013-01-01

Full Text Available UV-B induced changes in plants can influence sap-feeding insects through mechanisms that have not been studied. Herein the grain aphid, Sitobion avenae (Fabricius (Hemiptera: Aphididae, was monitored on barley plants under the treatments of control [0 kJ/ (m2.d], ambient UV-B [60 kJ/ (m2.d], and enhanced UV-B [120 kJ/ (m2.d] irradiation. Electrical penetration graph (EPG techniques were used to record aphid probing behaviors. Enhanced UV-B irradiated plants negatively affected probing behaviors of S. avenae compared with control plants. In particular, phloem factors that could diminish sieve element acceptance appeared to be involved, as reflected by smaller number of phloem phase, shorter phloem ingestion, and fewer aphids reaching the sustained phloem ingestion phase (E2>10min. On the other hand, factors from leaf surface, epidermis, and mesophyll cannot be excluded, as reflected by higher number of non-probing, longer non-probing and pathway phase, and later the time to first probe.

A new genus and species of tettigarctid cicada from the early Miocene of New Zealand: Paratettigarcta zealandica (Hemiptera, Auchenorrhyncha, Tettigarctidae)

Science.gov (United States)

Kaulfuss, Uwe; Moulds, Max

2015-01-01

Abstract A new genus and species of primitive cicada (Hemiptera: Tettigarctidae) is described from the early Miocene of southern New Zealand. Paratettigarcta zealandica gen. et sp. n. is the first cicada (Cicadoidea) fossil from New Zealand and exhibits wing venation patterns typical for the subfamily Tettigarctinae. It differs from other fossil taxa and the extant genus Tettigarcta in the early divergence of CuA2 from the nodal line in the forewing, its parallel-sided subcostal cell, the early bifurcation of vein M and long apical cells of the hindwing, and in wing pigmentation patterns. PMID:25829843

Nymphal and adult performance of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae), as a potential alternative host for egg parasitoids multiplication

International Nuclear Information System (INIS)

Peres, Wilsimar A.A.; Correa-Ferreira, Beatriz S.

2001-01-01

This research aimed to evaluate the potential of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) as host for multiplication of egg parasitoids, by determining the nymphal and adult performance of E. heros from laboratory and the field, comparing with Nezara viridula (L.) (Hemiptera: Pentatomidae), under mass conditions. One hundred eggs of E. heros and N. viridula were placed among the leaves of soybean plants contained in cages (50x50x70 cm) and observation were made until adult emergence. The nymphs fed on soybean pods, dry soybean and peanuts seeds. The number of nymphs that reached adulthood and the development time were calculated. The survivorship and reproduction performance of laboratory and field populations of E. heros and N. viridula were evaluated during 13 weeks in February-May 1999. The number of eggs produced by 100 pairs of stink bugs per cage containing the same diet was recorded. Nymphal development time of E. heros and N. viridula was 33.0 and 34.0 days and 65.0% and 71.3% of nymphs reached adulthood, respectively. Adults of E. heros reared under laboratory conditions produced 2.5 times more eggs (5547.0 eggs/cage) than those collected in the field (2262.7 eggs/cage). The adult field population of E. heros had reduced reproduction and longevity due to parasitism by Hexacladia smithii Ash. (Hymenoptera: Encyrtidae). The N. viridula adults collected in the field produced 1.7 times more eggs (6304.9 eggs/cage) than those reared in the laboratory (3609.2 eggs/cage). E. heros laboratory reared is a promising host for egg parasitoids multiplication when compared with N. viridula collected in the field. (author)

Nymphal and adult performance of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae), as a potential alternative host for egg parasitoids multiplication

Energy Technology Data Exchange (ETDEWEB)

Peres, Wilsimar A.A. [Universidade Federal do Parana, Curitiba, PR (Brazil). Dept. de Zoologia; Correa-Ferreira, Beatriz S. [EMBRAPA, Londrina, PR (Brazil). Centro Nacional de Pesquisa de Soja

2001-12-15

This research aimed to evaluate the potential of Euschistus heros (Fabr.) (Hemiptera: Pentatomidae) as host for multiplication of egg parasitoids, by determining the nymphal and adult performance of E. heros from laboratory and the field, comparing with Nezara viridula (L.) (Hemiptera: Pentatomidae), under mass conditions. One hundred eggs of E. heros and N. viridula were placed among the leaves of soybean plants contained in cages (50x50x70 cm) and observation were made until adult emergence. The nymphs fed on soybean pods, dry soybean and peanuts seeds. The number of nymphs that reached adulthood and the development time were calculated. The survivorship and reproduction performance of laboratory and field populations of E. heros and N. viridula were evaluated during 13 weeks in February-May 1999. The number of eggs produced by 100 pairs of stink bugs per cage containing the same diet was recorded. Nymphal development time of E. heros and N. viridula was 33.0 and 34.0 days and 65.0% and 71.3% of nymphs reached adulthood, respectively. Adults of E. heros reared under laboratory conditions produced 2.5 times more eggs (5547.0 eggs/cage) than those collected in the field (2262.7 eggs/cage). The adult field population of E. heros had reduced reproduction and longevity due to parasitism by Hexacladia smithii Ash. (Hymenoptera: Encyrtidae). The N. viridula adults collected in the field produced 1.7 times more eggs (6304.9 eggs/cage) than those reared in the laboratory (3609.2 eggs/cage). E. heros laboratory reared is a promising host for egg parasitoids multiplication when compared with N. viridula collected in the field. (author)

Estudios sobre plantas andinas,- V

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Cuatrecasas José

1943-12-01

Full Text Available Desde hace diez años, he venido interesándome por el conocimiento y clasificación del género Diplostephium, distribuido abundantemente en las zonas frías de los Andes, desde Venezuela al norte de Chile con un enclave en Costa Rica. Las excursiones realizadas en 1932 me permitieron descubrir dos nuevas especies colombianas (1 y el estudio de la colección Isern me dio oportunidad de conocer otras especies ecuatorianas y peruanas (2. A raíz del abundante material recogido en mis excursiones por Colombia desde el año 1938, decidí llevar a cabo el estudio monográfico del género; para ella diversos centros de los Estados Unidos pusieron a mi disposición sus coIecciones: Smithsonian Institution (United States National Herbarium, Field Museum of Natural History de Chicago y New York Botanical Garden, los cuales me remitieron el material para este fin al Instituto de Ciencias Naturales de Bogotá; el trabajo fue iniciado en este centro, pero al trasladarme a la Escuela Superior de Agricultura Tropical de Cali, la dirección del Instituto me permitió llevar para el Valle todos los ejemplares, incluso los del Herbario Nacional Colombiano, y así pude concluir el estudio provisional, en mi nuevo lugar de trabajo.

An annotated checklist of scale insects (Hemiptera: Coccoidea) of Saint Lucia, Lesser Antilles .

Science.gov (United States)

Malumphy, Chris

2014-07-31

An annotated list of 83 scale insect species (Hemiptera: Sterorrhyncha: Coccoidea) recorded from Saint Lucia is presented, based on data gathered from UK quarantine interceptions, samples collected in an urban coastal habitat in the North West of the Island in 2013, and published records. Thirty-three species (40%) are recorded for the first time for the country, including Dysmicoccus joannesiae (Costa Lima), a South American mealybug, and Poliaspoides formosana (Takahashi), an Asian armoured scale insect pest of bamboo, which are new for the Caribbean region. The economic, environmental and social impacts caused by introduced exotic species of scale insect are discussed. Two predatory midges Diadiplosis ?coccidivora (Felt) and Diadiplosis multifila (Felt) (Diptera: Cecidomyiidae) are recorded for the first time from Saint Lucia. The latter species was observed causing 90% mortality of a large infestation of passion vine mealybug Planococcus minor (Maskell) on soursop fruit. 

Situación de los Estudios Clínicos en Colombia

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Alexander Carreño Dueñas

2013-06-01

Full Text Available Antecedentes: Los estudios clínicos son un tipo de investigación que ayudan a la ciencia médica a encontrar nuevas formas de prevenir, detectar, diagnosticar o tratar enfermedades y hoy en día son los estudios que aportan la mayor evidencia científica frente al uso de nuevas terapias farmacológicas. Objetivo: Describir la situación actual de los estudios clínicos en Colombia. Métodos: Se consultaron las bases de datos de registro de estudios clínicos, se realizó una revisión de los aspectos regulatorios y la normatividad relacionada. Resultados: no es posible determinar la cantidad exacta de estudios clínicos registrados en Colombia debido a que no se cuenta con un sistema de registro. Los estudios clínicos registrados difieren en las bases de datos consultadas. Desde 1995 a 2013 se identificaron 738 ensayos únicos, el 90% de ellos fueron patrocinados por industrias farmacéuticas, 62% fueron fase III y se han desarrollado principalmente en enfermedades crónicas como el cáncer, las enfermedades cardiovasculares y las degenerativas. Conclusiones: Colombia carece de un sistema de registro de estudios clínicos que permita realizar un seguimiento adecuado por parte de la comunidad y los profesionales de la salud. Debido a que el mayor porcentaje de estos estudios han sido patrocinados por la Industria Farmacéutica, se hace necesario fomentar y desarrollar estrategias que permitan el desarrollo de investigación propia

A new iranian species of Uroleucon Mordvilko, 1914 (Hemiptera, Aphididae from specimens in the Natural History Museum collection

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Nieto Nafría, Juan M.

2014-06-01

Full Text Available Uroleucon (Uromelan helichrysi sp. n. (Hemiptera, Aphididae, Aphidinae: Macrosiphini is established from Iranian apterous and alate viviparous females caught on Helichrysum sp. (Asteraceae and preserved in the collection of the Natural History Museum (BMNH in London. The number of setae on the first tarsal segments (5, the number of caudal setae (20 to 28, the presence of abdominal marginal tubercles on abdominal segments 2 to 4, and the size of the cells of the siphuncular reticulation (relatively small allow the new species to be distinguished from other Palaeartic species of the subgenus Uromelan. Blackman and Eastop’s key to apterae on Helichrysum is modified to include the new species. urn:lsid:zoobank.org:pub:E2B89D59-05FD-4A9E-AD78-B3C302219A10Se establece la especie Uroleucon helichrysi n. sp. (Hemiptera: Aphididae: Aphidinae: Macrosiphini con la descripción de sus hembras vivíparas ápteras y aladas recogidas en Irán sobre Helichrysum sp. (Asteraceae, conservadas en la colección del Natural History Museum de Londres. La nueva especie se diferencia de otras especies paleárticas del subgénero Uromelan por la cantidad de setas en el primer segmento tarsal (5, la cantidad de setas caudales (20 a 28, por el tamaño de las celdillas de la reticulación cornicular (que son relativamente pequeñas y por la presencia de papilas marginales (presentes en los segmentos abdominales 2 a 4 Se incluye una modificación a la clave de Blackman and Eastop para las ápteras que viven sobre Helichrysum. urn:lsid:zoobank.org:pub:E2B89D59-05FD-4A9E-AD78-B3C302219A10

Comparison of Relative Bias, Precision, and Efficiency of Sampling Methods for Natural Enemies of Soybean Aphid (Hemiptera: Aphididae).

Science.gov (United States)

Bannerman, J A; Costamagna, A C; McCornack, B P; Ragsdale, D W

2015-06-01

Generalist natural enemies play an important role in controlling soybean aphid, Aphis glycines (Hemiptera: Aphididae), in North America. Several sampling methods are used to monitor natural enemy populations in soybean, but there has been little work investigating their relative bias, precision, and efficiency. We compare five sampling methods: quadrats, whole-plant counts, sweep-netting, walking transects, and yellow sticky cards to determine the most practical methods for sampling the three most prominent species, which included Harmonia axyridis (Pallas), Coccinella septempunctata L. (Coleoptera: Coccinellidae), and Orius insidiosus (Say) (Hemiptera: Anthocoridae). We show an important time by sampling method interaction indicated by diverging community similarities within and between sampling methods as the growing season progressed. Similarly, correlations between sampling methods for the three most abundant species over multiple time periods indicated differences in relative bias between sampling methods and suggests that bias is not consistent throughout the growing season, particularly for sticky cards and whole-plant samples. Furthermore, we show that sticky cards produce strongly biased capture rates relative to the other four sampling methods. Precision and efficiency differed between sampling methods and sticky cards produced the most precise (but highly biased) results for adult natural enemies, while walking transects and whole-plant counts were the most efficient methods for detecting coccinellids and O. insidiosus, respectively. Based on bias, precision, and efficiency considerations, the most practical sampling methods for monitoring in soybean include walking transects for coccinellid detection and whole-plant counts for detection of small predators like O. insidiosus. Sweep-netting and quadrat samples are also useful for some applications, when efficiency is not paramount. © The Authors 2015. Published by Oxford University Press on behalf of

Estrategia organizacional: una propuesta de estudio

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Ángela Lucía Noguera Hidalgo

2014-01-01

Full Text Available El concepto de estrategia en el contexto de las organizaciones empresariales es uno de los temas que genera gran interés en los asuntos del management. Sin embargo, la proposición de nuevos enfoques no ha aportado significativamente al avance en el estudio de este concepto. El estancamiento se hace evidente, razón por la cual el presente documento esboza una propuesta que reúne algunos de los retos para el estudio de la estrategia. En él se presenta una revisión que deja por sentados los posibles caminos a seguir, los cuales contribuyen a la perdurabilidad de las organizaciones.

Triatoma ryckmani (Hemiptera: Reduviidae) in the epiphyte Tillandsia xerographica (Bromeliaceae) in the semiarid region of Guatemala.

Science.gov (United States)

Marroquín, Ricardo; Monroy, Carlota; Jaenson, Thomas G T

2004-05-01

For the first time, the reduviid bug Triatoma ryckmani Zeledón and Ponce (Hemiptera; Reduviidae) was recorded to inhabit the epiphyte Tillandsia xerographica Rohweder (Bromeliaceae) in the semiarid region of Guatemala. These bromeliads grow mainly in drought-resistant trees with rough bark such as Pereskia lychnidiflora (Cactaceae). In our study site, we investigated 30 T. xerographica, and 53 specimens of T. ryckmani were found. Most T. ryckmani (68.5%) were unfed. Ants (Formicidae) were the predominant (92.2%) insect taxon in T. xerographica. Other insects such as Blattidae (3.0%), Reduviidae (T. ryckmani: 2.5%), Blaberidae (2.2%), Gryllidae (0.1%), and Acrididae (0.1%) were recorded in the bromeliads. T. xerographica is illegally commercialized without previous inspection. This may cause accidental introduction of T. ryckmani to houses and to other countries.

ESTUDIOS DE PERIODISMO EN ARGENTINA: ANTECEDENTES E INTERROGANTES

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Adriana Amado Suárez

2014-06-01

Full Text Available Este artículo presenta de forma resumida una revisión de antecedentes de los estudios empíricos de periodismo en Argentina. En las publicaciones de los últimos años los investigadores coincidían en señalar falta de datos de la profesión y el escaso desarrollo de los marcos teóricos afines a los estudios de periodismo. La investigación local priorizó abordajes y métodos que no se ocupan del conjunto de los periodistas. Antes bien, buena parte de la investigación confunde análisis de los medios y los mensajes con el estudio del periodismo y sigue sin brindar datos que permitan conocer las condiciones de trabajo y el perfil profesional de los periodistas argentinos.

doméstico. Discusiones y estudios recientes

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Patricia Arias

2013-01-01

Full Text Available Con base en la revisión de algunos estudios recientes que se han llevado a cabo en diver- sas comunidades rurales de las nuevas regiones migratorias, en este artículo se revisan, de manera crítica, dos interpretaciones de los estudios sobre la familia rural: la economía campesina como unidad de producción-consumo y el ciclo de desarrollo de la unidad doméstica. En las condiciones actuales la migración, interna e internacional, desem- peña un papel decisivo en las comunidades rurales. Muchos estudios han constatado la voluntad de las mujeres de salir de los grupos domésticos y sumarse a los flujos migra- torios por motivos particulares, por situaciones y demandas específicas de ellas; su salida ha contribuido al resquebrajamiento de los sistemas tradicionales de organización y re- producción de la familia campesina. Las feministas, y más tarde los estudios con la perspectiva de género, criticaron la visión de que las familias rurales constituían unidades de producción-consumo donde las decisiones correspondían a un modelo de estrategias familiares de sobrevivencia y reproducción (Hondagneu-Sotelo, 2007; Wolf, 1990. Ese modelo privilegiaba la homo- geneidad, la colectividad, la solidaridad y el consenso, es decir, suponía que en los hogares no había conflictos ni tensiones a la hora de tomar decisiones que a todos com- prometían (Ariza, 2007. La familia era una “unidad económica moral” que se susten- taba en los principios de “reciprocidad, consenso y altruismo” (Grasmuck y Pessar, 1991. Los estudios desde el enfoque de género señalaron que en las familias había relacio- nes de poder basadas en una distribución jerárquica y desigual de los derechos, recursos y autoridad que afectaban especialmente a las mujeres (Ariza, 2007; González Montes, 2002; Hondagneu-Sotelo, 2007; Wolf, 1990. Las críticas alcanzaron a los estudios migratorios: la migración no era un fenómeno exclusivamente de los hombres, las mi

El estudio de la cadena productiva del fique

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Maria Eugenia Morales Rubiano

2002-09-01

Full Text Available El estudio recopila los resultados más importantes obtenidos en el trabajo de grado denominado "Estudio de factibilidad de la cadena productiva del fique cultivado en Colombia", el cual tomo como punto de referencia el sector fiquero para estimas la factibilidad de aplicar un esquema de cadena productiva, a través de la estructura y análisis estratégico del sistema.

Milkweed (Gentianales: Apocynaceae): a farmscape resource for increasing parasitism of stink bugs (Hemiptera: Pentatomidae) and providing nectar to insect pollinators and monarch butterflies.

Science.gov (United States)

Tillman, P G; Carpenter, J E

2014-04-01

In peanut-cotton farmscapes in Georgia, the stink bugs Nezara viridula (L.) and Chinavia hilaris (Say) (Hemiptera: Pentatomidae) and the leaffooted bug, Leptoglossus phyllopus (L.) (Hemiptera: Coreidae), disperse at crop-to-crop interfaces to feed on bolls in cotton. The main objective of this study was to determine whether insecticide-free tropical milkweed (Asclepias curassavica L.), a nectar-producing plant, can increase parasitism of these bugs by Trichopoda pennipes (F.) (Diptera: Tachinidae) and provide nectar to monarch butterflies and insect pollinators in these farmscapes. Peanut-cotton plots with and without flowering milkweed plants were established in 2009 and 2010. Adult T. pennipes, monarch butterflies, honey bees, and native insect pollinators readily fed on floral nectar of milkweed. Monarch larvae feeding on milkweed vegetation successfully developed into pupae. In 2009, N. viridula was the primary host of T. pennipes in cotton, and parasitism of this pest by the parasitoid was significantly higher in milkweed cotton (61.6%) than in control cotton (13.3%). In 2010, parasitism of N. viridula, C. hilaris, and L. phyllopus by T. pennipes was significantly higher in milkweed cotton (24.0%) than in control cotton (1.1%). For both years of the study, these treatment differences were not owing to a response by the parasitoid to differences in host density, because density of hosts was not significantly different between treatments. In conclusion, incorporation of milkweed in peanut-cotton plots increased stink bug parasitism in cotton and provided nectar to insect pollinators and monarch butterflies.

HÁBITOS DE ESTUDIO VS. FRACASO ACADÉMICO

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Martha Rocío Torres Narváez

2009-01-01

Full Text Available El objetivo del artículo es exponer algunas estrategias de apoyo pedagógico que, articuladas con la estructura curricular del Programa de Fisioterapia de la Universidad del Rosario, apoyan el proceso de aprendizaje de los estudiantes a partir de las categorías analizadas con la aplicación del instrumento "Inventario de hábitos de estudio" a los estudiantes que cursaron una de las asignaturas de mayor fracaso académico. Los hábitos de estudio tienen una implicación en el rendimiento académico y esto influye en cómo se enfrenta el reto de asumir las responsabilidades de ser universitario. Como parte de la metodología, se realizó un análisis de los resultados de la aplicación del inventario antes nombrado, en aras de identificar y replantear las estrategias pedagógicas. Para esto se revisaron los planes de asignaturas y se determinaron las actividades extracurriculares que se diseñaron para abordar la problemática de la deserción estudiantil relacionada con el fracaso académico. El estudio realizado determinó la importancia del desarrollo de habilidades o hábitos de estudio apropiados para el buen desempeño del estudiante universitario. Además, comprobó que deben considerarse en el entorno universitario la cultura de aprendizaje en el proceso de formación, las habilidades de trabajo en equipo, la apropiación y el desarrollo de conocimiento, así como las buenas relaciones interpersonales, para disminuir el fracaso académico y mejorar los hábitos de estudio.

Efeito da cobertura vegetal sobre a pérola-da-terra (Hemiptera: Margarodidae na cultura da videira = Effect of cover crops on brazilian ground pearl (Hemiptera: Margarodidae in vineyards

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Marcos Botton

2010-10-01

Full Text Available O uso da cobertura vegetal em vinhedos é uma prática empregada paraminimizar a erosão e melhorar as qualidades químicas e físicas do solo. Neste trabalho, foi avaliado o efeito de coberturas vegetais sobre a população da pérola-da-terra Eurhizococcus brasiliensis (Hemiptera: Margarodidae na cultura da videira. No primeiro experimento, o vinhedo foi mantido sem cobertura vegetal por meio da aplicação trimestral do herbicida glifosato comparado com o uso de vegetação espontânea, durante o ano, de vegetação espontânea, no verão, e de aveia preta no inverno. No segundo experimento foi avaliado o efeito da mucuna-preta (Stizolobium aterrimum cultivada no vinhedo durante o verão comparado com a vegetação espontânea. No primeiro experimento, a população da pérolada-terra nas raízes de plantas de videira foi maior em áreas mantidas sem cobertura vegetal emostrou-se semelhante em áreas onde se manteve a vegetação espontânea, ao longo do ano, e com aveia preta no inverno e vegetação espontânea no verão. A infestação das plantas de videira em áreas onde foi empregada a mucuna-preta durante o verão foi equivalente à da vegetação espontânea. S. aterrimum foi registrada pela primeira vez como hospedeira de E. brasiliensis. The use of cover crops is an important strategy to reduce erosion and improve chemical and physical soil properties. In this work, we evaluate the effect of cover crops to reduce Brazilian ground pearl Eurhizococcus brasiliensis (Hemiptera: Margarodidae infestation in vineyards. In the first experiment, glyphosate was sprayed each three months to avoid cover crops. This treatment was compared with naturally occurring vegetation during the year and the use of Avena sativa in the winter. In a second experiment, Stizolobium aterrimum was cultivated during the summer compared with naturally occurringvegetation. Brazilian ground pearl population was higher in glyphosate sprayed areas than where cover

Razonamiento covariacional en el estudio de funciones cuadráticas

OpenAIRE

Jhony Alexander Villa-Ochoa

2012-01-01

En este artículo se usa el marco conceptual de Carlson et al. (2003) para discutir los resultados de un estudio de caso, el cual describe la forma como un estudiante razona covariacionalmente al enfrentarse a situaciones de variación asociadas a funciones cuadráticas. El estudio se ideó para desarrollar una línea convergente de indagación (Yin, 2009), la cual se centró en las descripciones que el estudiante realizaba a medida que abordaba las situaciones diseñadas para el estudio; dichas ...

El estudio de las psicopatologías en Puerto Rico

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Alfonso Martínez Taboas

1995-01-01

El estudio de las psicopatologías en Puerto Rico fue un campo poco productivo durante las primeras siete décadas de este siglo. Durante este término de tiempo las publicaciones profesionales fueron exiguas y mayormente anecdóticas. Sin embargo, la década de los años ochenta fue una muy productiva en términos de publicaciones profesionales y estudios de corte empírico. Principalmente se destacan una serie programática de estudios epidemiológicos que abarcan poblaciones de niñ...

Estudio epidemiológico de salud oral en adultos. Comunidad Valenciana, 2006

OpenAIRE

Eustaquio Raga, Mª Vicenta

2008-01-01

RESUMEN En las últimas dos décadas se han venido realizando estudios epidemiológicos de salud oral en adultos en las diferentes comunidades autónomas españolas. Así la ausencia de dicho estudio de ámbito autonómico valenciano justifica plenamente su realización. En la realización del presente estudio nos hemos propuesto como objetivo general el evaluar el estado de salud bucodental de la población adulta y mayor de la Comunidad Valenciana. Se ha diseñado un estudio transversal o de p...

Hallazgo de Triatoma platensis Neiva, 1913 (Hemiptera, Triatominae en el estado brasileño de "Rio Grande do Sul" Finding of Triatoma platensis Neiva, 1913 (Hemiptera, Triatominae in the Brazilian State of "Rio Grande do Sul"

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Roberto Salvatella

1991-02-01

Full Text Available Triatoma platensis Neiva 1913 (Hemiptera, Triatominae, especie ornitófila, con área de dispersión conocida en Argentina, Bolivia, Paraguay y Uruguay es notificada en un primer registro para Brasil. Hallada en el municipio de Uruguaiana (Río Grande do Sul en nidos de Anumbius annumbi (Vieillot, 1817 (Passeriformes, Furnariidae donde cohabitaba con cricétidos de la especie Orizomys flavescens. Ningún ejemplar de los siete colectados se presentó infectado por Trypanosoma cruzi.Triatoma platensis, an ornitophilic species, found in Argentina, Bolivia, Paraguay and Uruguay is reported for the first time in Brazil. It was found in the county of Uruguaiana (Rio Grande do Sul in nests of Anumbius annumbi (Vieillot, 1817 (Passeriformes, Furnariidae where it cohabited with cricetids belonging to the species Orizomys flavescens. None of the seven individuals collected were infected by Trypanosoma cruzi.

La auditoria sociolaboral y los estudios de relaciones laborales

OpenAIRE

Benito Bermejo, José Luis

2016-01-01

Se analizan los estudios de Relaciones Laborales en relación al perfil profesional de auditor sociolaboral, haciendo un repaso de la historia de ambos, así como comparando la titulación con otras titulaciones. Se concluye con una propuesta de futuro para los estudios de Relaciones Laborales. Grado en Relaciones Laborales y Recursos Humanos (Segovia)

A new species of the genus Mahanarva Distant, 1909 (Hemiptera: Cercopoidea: Cercopidae, with a key to the species from Central America and Mexico

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Ulises Castro–Valderrama

2018-02-01

Full Text Available The genus Mahanarva Distant, 1909 (Hemiptera: Cercopoidea: Cercopidae currently includes two subgenera: Mahanarva Distant, 1909 with 38 species and six subspecies, and Ipiranga Fennah, 1968 with nine species. The Manaharva species are all from the Americas, and a few species are important pests in pasture grasses and sugarcane. There are no reports of any Manaharva species from North America, including Mexico and areas to the north. Here, a new species is described from Mexico and a key to the species of Mahanarva from Central America and Mexico is proposed.

Author Details

African Journals Online (AJOL)

Bendifallah, L. Vol 9, No 1 (2017) - Articles Study of genitalia morphometric variability of the two Species Helix aperta and Helix aspersa (gasteropoda, pulmonata) Abstract PDF · Vol 9, No 1 (2017) - Articles Study of trophic relationships between diaspididae family species -host plants -predators and parasitoids in Algeria

First report of Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Lecanodiaspididae and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae in Brazil

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A. L. Marsaro Júnior

Full Text Available Abstract Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Coccoidea: Lecanodiaspididae and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae are reported for the first time in Brazil. Specimens of this scale insect were collected on branches and stems of Acacia mangium Willd., Leucaena leucocephala (Lam. de Wit (Fabaceae, Morus nigra L. (Moraceae, Citrus reticulata Blanco (Rutaceae, Tectona grandis L. f. (Verbenaceae, Anacardium occidentale (Anacardiaceae, Annona squamosa L. and Xylopia aromatica (Lam. Mart. (Annonaceae, in three municipalities of the Roraima state. All plants here mentioned are recorded for the first time as a host for L. dendrobii. Morphological characters of L. dendrobii and symptoms presented by the host plants infested by this pest are included in this work.

First report of Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Lecanodiaspididae) and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae) in Brazil.

Science.gov (United States)

Marsaro Júnior, A L; Peronti, A L B G; Costa, V A; Morais, E G F; Pereira, P R V S

2016-02-01

Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Coccoidea: Lecanodiaspididae) and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae) are reported for the first time in Brazil. Specimens of this scale insect were collected on branches and stems of Acacia mangium Willd., Leucaena leucocephala (Lam.) de Wit (Fabaceae), Morus nigra L. (Moraceae), Citrus reticulata Blanco (Rutaceae), Tectona grandis L. f. (Verbenaceae), Anacardium occidentale (Anacardiaceae), Annona squamosa L. and Xylopia aromatica (Lam.) Mart. (Annonaceae), in three municipalities of the Roraima state. All plants here mentioned are recorded for the first time as a host for L. dendrobii. Morphological characters of L. dendrobii and symptoms presented by the host plants infested by this pest are included in this work.

Apoyo a Estudios Geodinamicos con GPS en Guatemala

Science.gov (United States)

Robles, V. R.

2013-05-01

El Instituto Geografico Nacional de Guatemala implemento 17 estaciones GNSS en el año 2009, como un proyecto de credito mixto de donacion de equipamiento del Gobierno de Suiza, el cual, este equipamiento de estaciones CORS GNSS es un sistema de recepción y transmisión de datos crudos GPS RInex que utiliza la tecnologia Spider Web de Leica, asi mismo este sistema esta sirviendo para el espablecimiento de un marco geodesico nacional de coordenadas geodesicas oficiales, el cual se calculan u obtienen las velocidades en tiempos temporales programados de las 17 Estaciones CORS. La infraestructura del marco geodesico de Guatemala esta sirviendo de base para las aplicaciones de estudios geodinamicos como el monitoreo de del desplazamiento de las placas tectonicas por medio de un estudio que se inicio en el año de 1999, llamado medicion con GPS el sistema de Fallas de los rios Polochic Motagua de Guatemala, tambien para un estudio que se implemento para deformación de corteza terrestre local en un Volcan Activo de Guatemala llamado Pacaya. Para el estudio de medicion con GPS en el sistema de falla de los Rios del polochic Motagua se implementaron 16 puntos para medir con GPS de dos frecuencias en el año de 1999, el cual, tres puntos son estaciones geodesicas CORS IGS llamados GUAT, ELEN y HUEH, despues en el año de 2003 se hizo otra medicion en un total de 20 puntos, que permitió calcular las velocidades de desplazamieinto de los puntos en mención, usando como referencia el modelo NUVEL 1A de DeMets de la placa de Norteamerica. Este estudio fue en cooperación internacional por la universidad de Nice de Francia y el IGNde Francia. Para el estudio del monitoreo con GPS del volcan activo de Guatemala, se implementaron cuatro puntos al rededor del volcan, el cual, se realizan cuatro mediciones al año, que permiten determinar axialmente la distancias entre los puntos, y rebisar estadisticamente cual es el comportamiento de las distancias en funcion del tiempo, si

Estudio de factibilidad para la implantación de un restaurante de cocina en Quito

OpenAIRE

Abril Donoso, Aníbal Trosky

2007-01-01

Componentes y sustentos técnicos. Identificación y descripción de la empresa. Análisis de la industria o sector. Productos y servicos de la empresa. Datos importantes para entrar al mercado. Estudio de mercado. Objetivs del estudio de mercado. Investigación del mercado objetivo. Estudio técnico. Objetivos del estudio técnico. Localización del proyecto. Ingeniería del proyecto. Organización y administración. Estudio financiero. Objetivos de estudio financiero. Sistema contable de la empresa. C...

Estudios sobre Plantas Andinas, X

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Cuatrecasas José

1967-09-01

Full Text Available Durante la preparación del género Baccharis para Prima Flora Colombiana tuve que estudiar gran número de especies andinas, tropicales y extratropicales de fuera de Colombia; el objeto principal de tales estudios fue el de tipificar las especies íntimamente relacionadas con las colombianas y establecer su diferenciación taxonómica. La consulta de los tipos específicos y la identificación de gran número de colecciones procedentes de las regiones andinas hasta el sur del continente americano permitió precisar el concepto de bastantes especies y de su área geográfica, al mismo tiempo que el establecimiento de numerosas sinonimias.  La mayor parte de las novedades taxonómicas y de los comentarios derivados de tal estudio va incluída en el texto de las Astereae de Colombia a publicar en breve. El objeto de este artículo es dar a conocer otra parte de las novedades relativas a especies andinas de los países vecinos y describir varias entidades taxonómicas deficientemente conocidas, incorporando a su conocimiento los resultados de muchas disecciones llevadas a cabo en los mencionados estudios.  El trabajo basico para estas notas fue hecho en la Smithsonian Institution; se consultaron también las colecciones de los herbarios europeos de Londres, París, Florencia, Ginebra y Madrid en viaje hecho en otoño de 1963. National Science Foundation de Washington D.C. subvencionó los trabajos.

Effects Of Irradiation On Mealybug Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae) Infesting On Dragon Fruits

International Nuclear Information System (INIS)

Doan Thi The; Nguyen Thuy Khanh; Vo Kim Lang; Cao Van Chung; Tran Thien An; Nguyen Hoang Hanh Thi

2011-01-01

Since 2008 APHIS/USDA approved to import dragon fruit into the United States from Vietnam if fruits are treated with the minimum absorbed dose of 400 Gy to control fruit flies and mealybugs. However, a lower dose could be accepted if released data is enough to demonstrate that it is efficient to inhibit the development and stop the reproduction of adult females for three species of mealybugs (Order: Hemiptera; Family: Pseudococcidae) infesting on dragon fruit. Four development stages including 1 st , 2 nd , 3 rd instars and adult of Dymicoccus neobrevipes by isolating and rearing in the laboratory conditions were irradiated in Co-60 source gamma with dosages of 100, 200, 300 and 400 Gy. The main purposes of the study are to find the most tolerant stage and to determine the most optimal dose to control D. neobrevipes. The initial obtained results showed that the adult stage is the most radiotolerant and the dose of 200 Gy could be an effective dose to inhibit development and to control reproduction of D. neobrevipes. (author)

Effects of gamma irradiation on different stages of mealybug Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae)

Science.gov (United States)

The, Doan Thi; Khanh, Nguyen Thuy; Lang, Vo Thi Kim; Van Chung, Cao; An, Tran Thi Thien; Thi, Nguyen Hoang Hanh

2012-01-01

Utilization of phytosanitary irradiation as a potential treatment to disinfest agricultural commodities in trade has expanded rapidly in the recent years. Cobalt-60 gamma ray target doses of 100, 150, 200 and 250 Gy were used to irradiate immatures and adults of Dysmicoccus neobrevipes (Beardsley) (Hemiptera: Pseudococcidae) infesting dragon fruits to find the most tolerant stage and the most optimal dose range for quarantine treatment. In general, irradiation affected significantly all life stages of D. neobrevipes mortality and adult reproduction. The pattern of tolerance to irradiation in D. neobrevipes was 1st instars<2nd instars<3rd instars

The foraging behavior of Diaeretiella rapae (Hymenoptera: Braconidae on Diuraphis noxia (Hemiptera: Aphididae

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Tazerouni Zahra

2011-01-01

Full Text Available Host stage preference, functional response and mutual interference of Diaeretiella rapae (McIntosh (Hymenoptera: Braconidae: Aphidiinae on Diuraphis noxia (Mordvilko (Hemiptera: Aphididae were investigated under defined laboratory conditions (20±1°C; 60±5% relative humidity; 16 h light/8 h dark photoperiod. Nicholson’s model and linear regression were used to determine per capita search-efficiency and the interference coefficient, respectively. There was a significant difference between the rates of parasitism on different stages of D. noxia. The highest parasitism percentage was observed on the third instar nymphs of D. noxia in both choice and no-choice preference tests. Results of logistic regression revealed a type II functional response. The estimated values of search-efficiency (a and handling time (Th were 0.072 h-1 and 0.723 h, respectively. The maximum attack rate was calculated to be 33.22. The per capita search-efficiency decreased from 0.011 to 0.004 (h-1 as parasitoid densities increased from 1 to 8. Therefore, different host-parasitoid ratios can affect the efficacy of D. rapae.

Dose-response relationships of clothianidin, imidacloprid, and thiamethoxam to Blissus occiduus (Hemiptera: Blissidae).

Science.gov (United States)

Stamm, M D; Baxendale, F P; Heng-Moss, T M; Siegfried, B D; Blankenship, E E; Gaussoin, R E

2011-02-01

The western chinch bug, Blissus occiduus Barber (Hemiptera: Blissidae), has emerged as a serious pest of buffalograss, Buchlod dactyloides (Nuttall) Engelmann. In general, neonicotinoid insecticides effectively control a variety of turfgrass insects, particularly phloem-feeding pests. However, because of well documented inconsistencies in control, these compounds are generally not recommended for chinch bugs. This study was designed to document the contact and systemic toxicity of three neonicotinoid insecticides (clothianidin, imidacloprid, and thiamethoxam) to B. occiduus. In contact bioassays, thiamethoxam was approximately 20-fold less toxic than clothianidin or imidacloprid to B. occiduus nymphs and three-fold more toxic to adults. In adult systemic bioassays, thiamethoxam was up to five-fold more toxic than clothianidin or imidacloprid. Interestingly, thiamethoxam was significantly more toxic to adults than to nymphs in both contact and systemic bioassays. This was not observed with clothianidin or imidacloprid. Bifenthrin, used for comparative purposes, exhibited 1844-fold and 122-fold increase in toxicity to nymphs and adults, respectively. These results provide the first documentation of the relative toxicity of these neonicotinoid insecticides to B. occiduus.

Morphometric comparisons of Diaphorina citri (Hemiptera: Liviidae) populations from Iran, USA and Pakistan.

Science.gov (United States)

Lashkari, Mohammadreza; Hentz, Matthew G; Boykin, Laura M

2015-01-01

The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama (Hemiptera: Liviidae), vector of citrus greening disease pathogen, Huanglongbing (HLB), is considered the most serious pest of citrus in the world. Prior molecular based studies have hypothesized a link between the D. citri in Iran and the USA (Florida). The purpose of this study was to collect morphometric data from D. citri populations from Iran (mtCOI haplotype-1), Florida (mtCOI haplotype-1), and Pakistan (mtCOI haplotype-6), to determine whether different mtCOI haplotypes have a relationship to a specific morphometric variation. 240 samples from 6 ACP populations (Iran-Jiroft, Chabahar; Florida-Ft. Pierce, Palm Beach Gardens, Port St. Lucie; and Pakistan-Punjab) were collected for comparison. Measurements of 20 morphological characters were selected, measured and analysed using ANOVA and MANOVA. The results indicate differences among the 6 ACP populations (Wilks' lambda = 0.0376, F = 7.29, P citri species in this study, (1) Iran, (2) USA (Florida) and (3) Pakistan population. Morphometric comparisons provided further resolution to the mtCOI haplotypes and distinguished the Florida and Iranian populations.

Estudio comparativo del desarrollo de las inteligencias múltiples en alumnos que cursan o no estudios de danza en un conservatorio

OpenAIRE

Athanassopoulos-Zamorano, Néstor

2015-01-01

El objetivo de este trabajo es analizar si al comparar dos grupos de estudiantes, formados por alumnos que cursan estudios de danza en el conservatorio y alumnos que no los cursan, existen diferencias estadísticamente significativas en las Inteligencias Múltiples. La muestra total del estudio está compuesta por 175 personas, conformando dos grandes grupos, alumnos que estudian danza de manera oficial y alumnos que no estudian danza de manera oficial. Para conocer el nivel de las Inteligenc...

Biology and bionomics of dysdercus koenigii f. (hemiptera: pyrrhocoridae) under laboratory conditions

International Nuclear Information System (INIS)

Jaleel, W.; Naqqash, M.N.

2013-01-01

Red Cotton Bug, Dysdercus koenigii F., (Hemiptera: Pyrrhocoridae) is an important pest of cotton in South East Asia. Studies were carried out during 2012 to find the effect of temperature on incubation period and to explore the reproductive biology and bionomics of D. koenigii under laboratory conditions. Minimum incubation period (4.70+-0.42 days) was recorded at 35 degree C while the eggs failed to hatch at 40 degree C at 70-75% relative humidity. There were five nymphal instars which completed their development in 23.42+-2.49 days. The female lived longer (20.85+-6.12 days) than the male (16.18+-6.06 days). Each female mated three times in her life and there was statistically significant difference in mating duration (days), number of eggs laid and hatching percentage in each mating time. Number of eggs and hatching percentage was significantly higher after 1st time mating followed by 2nd and 3rd time matings. Duration of pre-oviposition, oviposition and post oviposition period recorded was 7.47+-0.86, 12.43+-0.82 and 8.77+-2.41 days, respectively. The study will help in devising pest management strategy against D. koenigii. (author)

Phenotypic variation and identification of Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) in China.

Science.gov (United States)

Zhao, Jing; Watson, Gillian W; Sun, Yang; Tan, Yongan; Xiao, Liubin; Bai, Lixin

2014-05-23

Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is an invasive mealybug that seriously damages cotton and other important crops. In previous studies in China, the presence of two submedian longitudinal lines of pigmented spots on the dorsum of adult females frequently has been used to identify this species. However, the present study records the occasional absence of pigmented spots in a sample from Guangxi province, China. Specimens without pigmented spots showed all the molecular and morphological characters that separate P. solenopsis from the similar species P. solani Ferris, especially the distribution of multilocular disc pores. In different geographic populations of P. solenopsis in China, mitochondrial COI and nuclear 28SrDNA genes are very similar (99.8-100%), indicating that they are conspecific. For COI, the genetic distance between P. solenopsis and P. solani is more than 3%. A map of the distribution of P. solenopsis in China is given. To help identify both pigmented and non-pigmented P. solenopsis accurately, an identification key to the 16 species of Phenacoccus found in China is provided. The key also identifies five potentially invasive Phenacoccus species not yet established in China, in case they get introduced there.

A new mealybug in the genus Pseudococcus Westwood (Hemiptera: Coccomorpha: Pseudococcidae) from North America, with a key to species of Pseudococcus from the New World.

Science.gov (United States)

Ellenrieder, Natalia Von; Watson, Gillian

2016-04-19

A mealybug species that feeds on Agave spp., Pseudococcus variabilis sp. n. (Hemiptera: Coccomorpha: Pseudococcidae), is described from North America. Its entry into the United States was likely via the horticultural trade on its host plants in the genus Agave (Liliales: Agavaceae). Descriptions and illustrations of the adult female and male, diagnosis from congeners in the New World, and a molecular characterization based on COI are provided, as well as a key to adult females of all Pseudococcus species recorded from the New World.

Estudios de competitividad en sistemas urbano - territoriales

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Esteban Soms García

2007-05-01

El Ministerio de Planificación y Cooperación de Chile, ha desarrollado varios estudios relacionados con la competitividad regional, destinados a pronosticar y evaluar los impactos positivos y negativos que podrían derivarse de los recientes Acuerdos de Libre Comercio suscritos por Chile con la Comunidad Europea, Estados Unidos y Corea, más los acuerdos ad portas con los Países de la APEC. En lo referente a competitividad urbana, destacan algunos estudios y proyectos relacionados con el programa gubernamental "Ciudades para el Bicentenario", impulsado el Ministerio de Vivienda y Urbanismo y los Gobiernos Regionales de Antofagasta, Bio Bio, Valparaíso y Santiago.

Duração do período ninfal e sobrevivência do predador Podisus connexivus Bergroth (Hemiptera, Pentatomidae, em três presas alternativas Ninfal period duration and survival of the predator Podisus connexivus Bergroth (Hemiptera, Pentatomidae, in three alternative preys

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José Cola Zanuncio

1993-01-01

Full Text Available Longevity and survival of the predator Podisus connexivus (Hemiptera: Pentatomidae were studied in three alternative preys: T1 - Bombyx mori (Lepidoptera, Bombycidae catterpilars; T2 - Musca domestica (Diptera, Muscidae larva and T3 - Tenebrio molitor (Coleoptera, Tenebrionidae larva. Longevity and survival were: 22,1±0,6 days and 54,3±5,3%; 25,2±1,3 days and 56,0±4,9% and 22,0±0,8 days and 34,6±8,6%, for treatments T1, T2 and T3, respectively. Comparing to other researches, a lower survival was found. This is probably because a F2 generation from field material, was used. Since the insect was not well adapted to the laboratory conditions this could have led to lower survival.

A preliminary molecular phylogeny of planthoppers (Hemiptera: Fulgoroidea based on nuclear and mitochondrial DNA sequences.

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Nan Song

Full Text Available The planthopper superfamily Fulgoroidea (Insecta: Hemiptera is one of the most dominant groups of phytophagous insects. It comprises about 20 families, containing a total of 9000 species worldwide. Despite several recent studies, the phylogeny of Fulgoroidea is not yet satisfactorily resolved and the phylogenetic positions of several key families, especially Cixiidae, Delphacidae, Tettigometridae, Nogodinidae, Acanaloniidae and Issidae, are contentious. Here, we expand upon recent phylogenetic work using additional nuclear (18S and 28S and novel mitochondrial (16S and cytb markers. Maximum likelihood and Bayesian analyses yielded robust phylogenetic trees. In these topologies, a group containing Cixiidae and Delphacidae is recovered as the sister group to the remaining taxa. Tettigometridae is placed in a more nested position and is grouped with Caliscelidae. Sister relationships are found between Flatidae and Ricaniidae, and between Dictyopharidae and Fulgoridae. Nogodinidae and Issidae are confirmed to be non-monophyletic families. For major nodes of interest, divergence date estimates are generally older than those from the fossil record.

Phytoreovirus-like sequences isolated from salivary glands of the glassy-winged sharpshooter Homolodisca vitripennis (Hemiptera: Cicadellidae)

International Nuclear Information System (INIS)

Katsar, C.S.; Hunter, W.B.; Sinisterra, X.H.

2007-01-01

The salivary glands of the Glassy-winged sharpshooter (GWSS), Homalodisca vitripennis Germar 1821, (syn. H. coagulata, Hemiptera: Cicadellidae) were collected and used to produce a cDNA library. Examination by BLASTX analyses identified 2 viral sequences, one a 610-base pair fragment and a second 839-base pair fragment, both of which had significant homology to viruses within the genus Phytoreovirus. Resequencing of the fragments confirmed sequence validities. These sequences were used for in silico protein translation and BLASTP analysis confirming the established homology. While the GWSS is the primary vector of Pierce's disease of grapes, this is the first report that GWSS may be a vector of a phytoreoviruses. Phylogenetic and homology comparisons with BLASTX, BLASTP, and PAUP analyses indicated that the viral sequences isolated from GWSS were closely related to the viruses in the Family Reoviridae, Genus Phytoreovirus, specifically Rice Dwarf Phytoreovirus (RDV). RDV is the only plant reovirus that is not limited to the phloem. Phytoreoviruses are transmitted in a propagative manner by cicadellid leafhoppers (Hemiptera: Cicadellidae), which acquire and transmit them during feeding. Phytoreoviruses have been reported from Agallian, Agalliopsis, Nephotettix, and Recilia, genera of leafhoppers, with evidence for transovarial transmission. The GWSS, although considered to feed primarily from the xylem, ingests from other plant tissues, such as the phloem and mesophyll during probing similar to other leafhoppers. The feeding behavior and wide host range of the GWSS provides an overlapping condition for these two organisms, leafhopper and virus. GWSS will feed from grasses as a transitory host, and on herbaceous and woody plants as primary hosts, which may favor the acquisition and transmission of Phytoreovirus by this leafhopper. Monitoring for an increase of Phytoreovirus spread in graminaceous crops that are in proximity to vineyards or tree crop orchards, where

Centro de Estudios para el Desarrollo Rural Sustentable y la Soberanía Alimentaria (CEDRSSA. Estudios e investigaciones: nueva ruralidad; enfoques y propuestas para América Latina

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Rosa Inés Babilonia Ballesteros

2014-01-01

Full Text Available Centro de Estudios para el Desarrollo Rural Sustentable y la Soberanía Alimentaria (CEDRSSA. Estudios e investigaciones:nueva ruralidad; enfoques y propuestas para América Latina.

Estudio de validez predictiva

OpenAIRE

Barquero-Segura, José Antonio

2003-01-01

Proyecto de investigación Este documento es un informe ejecutivo de la información obtenida de los estudios sobre la validez predictiva de los parámetros de selección de estudiantes y su relación con el rendimiento académico. En él se presenta una síntesis de información más relevante obtenida en los últimos 17 años.

DAMPAK APLIKASI INSEKTISIDA PERMETRIN TERHADAP HAMA PENGISAP BIJAIJ HELOPELTIS SPP. (HEMIPTERA: MIRIDAE DAN ARTROPODA NON-TARGET PADA PERTANAMAN KAKAO (THEOBROMA CACAO L.

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Rosma Hasibuan

2014-08-01

Full Text Available Impact of Permethrin-Insecticide Application on Mirid Pest of Cocoa Helopeltis spp. (Hemiptera: Miridae and on Non-target  Arthropods in Cocoa Plantations (Theobroma cacao L.. Cocoa mirid bugs, Helopeltis spp., (Hemiptera: Miridae are the most important pest of cocoa in Indonesia. A field study was conducted to investigate the effect of permethrin on cocoa mirids and non-target arthropods at a cocoa plantation in specific place. A randomized complete block design was used in which each of four blocks consisted of 5 treatments (4 concentrations of permethrin; 50; 100; 200; and 250 ppm and control. The results indicated that the application of permethrin significantly increased the cocoa mirids mortaliiy throughout all sprayed cocoa trees (up to 100% 72 h after application. Even at 1 h after application, the percentage of Cocoa mirids mortality 29.2% - 53.9% on cocoa trees sprayed with permethrin at concentrations of 50 - 250 ppm was significantly higher than that on control plant (3.6%. At 72 h after treatments, application of permethrin at concentrations of 200 and 250 ppm caused a complete kill (mortalty of 100% in the test mirids. Meanwhile, ground cloths caught at least 22 fanilies of abore-ground arthropods that were found killed by permethrin applications. Moreover, the number of non-target arthropods killed by permethrin at concentrations of 100 - 250 ppm (27.3 - 85.3 individuals/ground cloth were signifcantly higher than that on control trees. These results demonstrated that despite high efficacy of permethrin in controlling of cocoa mirids (Hetopeltis spp., its application also had adverse effects on non-target arthropods incocoa plantations.

Determinación de la capacidad de transmisión de fitoplasmas en dos morfoespecies de la familia Cicadellidae (Hemiptera: Auchenorryncha) de Bogotá D.C.

OpenAIRE

Perilla Henao, Laura Margarita

2013-01-01

Los fitoplasmas son bacterias fitopatógenas que carecen de pared celular, especializadas en la colonización intracelular del floema de plantas, son transmitidos por insectos vectores del suborden Auchenorryncha (Hemiptera) y están entre los seres vivos con menor tamaño. Los fitoplasmas forman un grupo monofilético en la clase Mollicutes que causan alteraciones morfológicas y fisiológicas en plantas ornamentales, hortícolas, maderables, frutales y cultivos en todo el mundo. No existen métodos...

Generalidades de los estudios de casos y controles

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Alejandro González Garay

2018-01-01

Full Text Available ANTECEDENTES: los estudios de casos y controles son de utilidad cuando se buscan factores de riesgo para enfermedades poco comunes o que tienen un periodo de latencia prologado. OBJETIVO: identificar las principales características del estudio de casos y controles (Ca-Co para favorecer la disminución de sesgos durante su evaluación o conducción. DESCRIPCIÓN: este diseño se caracteriza por la selección de sujetos con o sin el evento de interés. Éstos se comparan para identificar los factores de riesgo que favorecieron la presencia de este evento. La finalidad de este tipo de estudios es la de inferir una relación causal expresada mediante razón de momios y los intervalos de confianza al 95%. CONCLUSIONES: el diseño de Ca-CO es relativamente fácil y rápido de realizar. Sin embargo, es susceptible a múltiples fuentes de sesgo, las cuales deben de ser minimizadas para obtener mayor confiabilidad de las inferencias obtenidas.

Estudios marxistas de la cultura y los medios

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Roy Alfaro Vargas

2016-05-01

Full Text Available Este artículo introduce los Estudios Marxistas de la Cultura y los Medios (EMCM a Latinoamérica y expone los principales fundamentos teóricos y epistemológicos de los estudios marxistas de la cultura y los medios. Se analiza la relación entre la teoría de la auto-organización, la dialéctica y la teoría crítica, alrededor del estudio de la Web 2.0 y de los sitios de redes sociales. Además, se explica el rol de la teoría marxiana del valor dentro de los EMCM, como medio para establecer la crítica del trabajo digital alienado realizado por el usuario de los sitios de redes sociales. En este sentido, se expone el concepto de Web 3.0 como medio para la superación dialéctica de la Web 2.0, en cuanto proceso de participación democrática, basada en la construcción de medios alternativos.

Los estudios culturales y la construcción social del patrimonio cultural

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Rosa Elena Malavassi Aguilar

2017-01-01

Full Text Available El presente artículo forma parte una investigación más amplia, cuyo tema es la construcción social del patrimonio urbano y arquitectónico en la ciudad de San José, Costa Rica. El proyecto tiene por objetivo analizar la forma en que se ha construido el concepto de patrimonio en Costa Rica, específicamente en la ciudad de San José, su capital. En este texto se realiza una revisión de los postulados de los principales autores de la corriente de los estudios culturales, para definir un esquema de análisis aplicable al caso de estudio. El artículo se estructura en cuatro apartados: inicia con la obra de los pioneros de este tipo de estudios en Inglaterra, luego se analiza su repercusión en otras latitudes, por ejemplo, el desarrollo de los estudios poscoloniales en lugares como la India, para luego pasar a los trabajos de autores latinoamericanos, y finalmente hacer referencia a su impacto en el desarrollo de los estudios culturales en Costa Rica.

LOS ESTUDIOS DE MERCADO EN APOYO A LA EXPORTACIÓN DE SERVICIOS PROFESIONALES: ESTUDIO DE CASO DE LA INVERSIONES GAMMA S/A

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Mercedes Sánchez-Sánchez

2016-01-01

Full Text Available El trabajo refiere la importancia de los estudios de mercado (EM en la toma de decisiones en las organizaciones. Dichos estudios caracterizan el entorno: competitivo, económico, social, regulador, político etc., y determinan las amenazas y las oportunidades a que se enfrenta la organización, para comercializar sus productos y servicios. Se presenta un estudio de caso que refleja los resultados alcanzados por la aplicación de los EM por la empresa cubana Inversiones Gamma S/A, comercializadora de servicios profesionales del Ministerio de Ciencia, Tecnología y Medio Ambiente de Cuba (CITMA, en la identificación de socios comerciales y en la concertación de alianzas estratégicas, con empresas que brindan servicios medioambientales y de riesgo industrial para las industrias petroleras: PEMEX (México, PDVSA (Venezuela y Petroamazonas (Ecuador. Así como también con empresas que realizan el servicio de restauración de playas en: Cancún, Bahamas y Jamaica.

Weed hosts of cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae).

Science.gov (United States)

Vennila, S; Prasad, Y G; Prabhakar, M; Agarwal, Meenu; Sreedevi, G; Bambawale, O M

2013-03-01

The exotic cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) invaded India during 2006, and caused widespread infestation across all nine cotton growing states. P. solenopsis also infested weeds that aided its faster spread and increased severity across cotton fields. Two year survey carried out to document host plants of P. solenopsis between 2008 and 2010 revealed 27, 83, 59 and 108 weeds belonging to 8, 18, 10 and 32 families serving as alternate hosts at North, Central, South and All India cotton growing zones, respectively. Plant species of four families viz., Asteraceae, Amaranthaceae, Malvaceae and Lamiaceae constituted almost 50% of the weed hosts. While 39 weed species supported P. solenopsis multiplication during the cotton season, 37 were hosts during off season. Higher number of weeds as off season hosts (17) outnumbering cotton season (13) at Central over other zones indicated the strong carryover of the pest aided by weeds between two cotton seasons. Six, two and seven weed hosts had the extreme severity of Grade 4 during cotton, off and cotton + off seasons, respectively. Higher number of weed hosts of P. solenopsis were located at roadside: South (12) > Central (8) > North (3) zones. Commonality of weed hosts was higher between C+S zones, while no weed host was common between N+S zones. Paper furnishes the wide range of weed hosts of P. solenopsis, discusses their significance, and formulated general and specific cultural management strategies for nationwide implementation to prevent its outbreaks.

How will Mahanarva spectabilis (Hemiptera: Cercopidae) Respond to Global Warming?

Science.gov (United States)

Fonseca, M G; Auad, A M; Resende, T T; Hott, M C; Borges, C A V

2016-01-01

The aim of this study was to determine the favorable constant temperature range for Mahanarva spectabilis(Distant) (Hemiptera: Cercopidae) development as well as to generate geographic distribution maps of this insect pest for future climate scenarios. M. spectabilis eggs were reared on two host plants (Brachiaria ruziziensis(Germain and Edvard) and Pennisetum purpureum(Schumach)), with individual plants kept at temperatures of 16, 20, 24, 28, and 32 °C. Nymphal stage duration, nymphal survival, adult longevity, and egg production were recorded for each temperature*host plant combination. Using the favorable temperature ranges for M. spectabilis development, it was possible to generate geographic distribution. Nymphal survival was highest at 24.4 °C, with estimates of 44 and 8% on Pennisetum and Brachiaria, respectively. Nymphal stage duration was greater on Brachiaria than on Pennisetum at 20 and 24 °C but equal at 28 °C. Egg production was higher on Pennisetum at 24 and 28 °C than at 20 °C, and adult longevity on Pennisetum was higher at 28 °C than at 20 °C, whereas adult longevity at 24 °C did not differ from that at 20 and 28 °C. With these results, it was possible to predict a reduction in M. spectabilis densities in most regions of Brazil in future climate scenarios. © The Author 2016. Published by Oxford University Press on behalf of the Entomological Society of America.

Ecotope effect in Triatoma brasiliensis (Hemiptera: Reduviidae) suggests phenotypic plasticity rather than adaptation.

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Batista, V S P; Fernandes, F A; Cordeiro-Estrela, P; Sarquis, O; Lima, M M

2013-09-01

Triatoma brasiliensis (Hemiptera: Reduviidae) is an important vector of Chagas' disease in both sylvatic and peridomestic ecotopes. Discriminating between these populations of Triatominae has been proposed as a means of investigating re-infestation rates of human dwellings. Geometric morphometrics have been widely applied in the study of Triatominae polymorphisms at species and population levels. This study characterizes morphometric differences between sylvatic and peridomestic populations, as well as between sexes in T. brasiliensis specimens from Jaguaruana, Ceará, in northeastern Brazil. No differences in either the shape or size of the cephalic capsule were apparent between sexes or ecotopes. However, the wings showed differentiation in shape and size. Sexual dimorphism was detected, with females presenting significantly higher values and conformations. Size differentiation was also evident, with sylvatic specimens being generally larger than peridomestic examples. These results indicate that differences in the wings of T. brasiliensis may be related to the existence of phenotypic plasticity, and variations in size and shape may be associated with different ecotopes, possibly as a result of conditions in each micro-habitat, such as temperature, relative humidity, food supply and density. © 2012 The Royal Entomological Society.

First record of Pulvinaria urbicola Cockerell (Hemiptera: Coccidae) from India, with a key to the Indian species of Pulvinaria Targioni Tozzetti.

Science.gov (United States)

Joshi, Sunil

2017-02-23

The notoriously destructive and invasive soft scale, Pulvinaria urbicola Cockerell (Hemiptera: Coccidae), is recorded for the first time from India. This scale, with variable morphological appearance and similarities with other known scales of the same genus established in India, is redescribed to facilitate its identification and separation from other similar species. Information on its host range, natural enemies and distribution is provided. Management options in the event of an outbreak are discussed briefly. A key to the species of Pulvinaria Targioni Tozzetti in India is also provided. This new arrival warrants special attention in India as it is a potentially damaging plant pest and has a broad host range across many plant families.

New data on polymorphism of the meadow spittlebug Philaenus spumarius (L.) (Hemiptera: Aphrophoridae) from the island of São Miguel (Azores).

Science.gov (United States)

Borges, Paulo A V; Rodrigues, Ana S B; Silva, Sara E; Seabra, Sofia G; Paulo, OctÁvio S; Quartau, JosÉ A

2018-01-02

The meadow spittlebug, Philaenus spumarius (L.) (Hemiptera, Aphrophoridae) is a widespread insect species in the Holarctic region, exhibiting a dorsal colour balanced polymorphism. In the Azores the species is known from high elevations in Terceira and São Miguel islands. A sample of 235 individuals from Pico da Vara and Graminhais protected areas (São Miguel, Azores) (between 645 and 935 m a.s.l.), collected in 2000 and 2017, showed a remarkable high frequency of the melanic morphs flavicollis (FLA) and quadrimaculatus (QUA). In addition, a high frequency of melanics was observed in males. We explore the hypotheses for the origin of Azorean colonization and for the high proportion of melanism in the Azorean populations.

Atividade de buprofezin sobre a cigarrinha verde do feijoeiro Empoasca kraemeri (Ross & Moore, 1957) (Hemiptera, Cicadellidae) em condições de laboratório

OpenAIRE

Moreno,Paulo Rogério; Nakano,Octávio

2002-01-01

A espécie Empoasca kraemeri é uma importante praga para a cultura do feijoeiro (Phaseolus vulgaris L.) em toda a América Latina, sendo necessário recorrer ao controle químico quando a praga atinge alta população. Neste trabalho, foi estudado o efeito do inseticida buprofezin sobre ninfas de primeiro instar de Empoasca kraemeri (Hemiptera, Cicadellidae), sob condições de laboratório. Esta fase da praga mostrou-se altamente susceptível ao inseticida, sendo a CL50 estimada de 0,112 mg L-1. Em ou...

Life History of the Camelthorn Gall Leafhopper, Scenergates viridis (Vilbaste (Hemiptera, Cicadellidae

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Roman Rakitov

2012-01-01

Full Text Available The world’s only member of Hemiptera Auchenorrhyncha known to form true galls, the leafhopper Scenergates viridis (Vilbaste (Cicadellidae, transforms leaves of camelthorn (Alhagi maurorum Medikus, Fabaceae into pod-like chambers, up to 35 mm long, inside which individual leafhoppers develop, mate, and lay eggs. At the study site 40 km SE of Bukhara (Uzbekistan, two generations develop annually. First-instar nymphs cause young leaves to fold along the midrib. The subsequent development takes place inside the tightly closed growing gall, plugged at both ends with a mixture of leafhopper excrement, brochosomes, and crushed exuviae. These plugs act as mechanical barriers and sticky traps for intruders. The inner surface of the gall, lined with brochosomes and wax platelets, is hydrophobic. Adult males emerge from their galls and squeeze into female galls. Fertilized females insert an average of 146 eggs under the gall’s inner epidermis and remain inside, possibly protecting the brood, until they die. The walls of the galls containing eggs are approximately three times thicker than regular leaves. The galls are subject to predation by Gelechiidae caterpillars; the eggs of the leafhopper are parasitized by two species of Trichogrammatidae and one Mymaridae (Hymenoptera, and its larvae by one species of Pipunculidae (Diptera.

Estudio molecular de pacientes colombianos afectados por enanismo esencial

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Navarrete Vargas, Julie Viviana

2017-01-01

Los síndromes de enanismo esencial microcefálico son un grupo de enfermedades monogénicas infrecuentes que se caracterizan principalmente por talla baja extrema proporcionada de inicio prenatal y microcefalia severa. En los pacientes que formaron parte del presente estudio se investigaron variantes en el gen PCNT debido a que presentaban hallazgos clínicos compatibles con el síndrome MOPD II (enanismo esencial osteodisplásico microcefálico tipo II). Posteriormente, se amplió el estudio con...

Efeitos da temperatura e do alimento no desenvolvimento de Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae Effects of temperature and food on the development of Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae

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Fábio Souto Almeida

2007-12-01

Full Text Available Dysdercus maurus Distant, 1901 (Hemiptera, Pyrrhocoridae é uma importante praga de Gossypium spp. (algodoeiro, Citrus Sinensis Osbeck (Rutaceae (laranjeira e Citrus reticulata (Rutaceae (tangerineira, além de sementes de Chorisia speciosa St. Hil. (paineira. Este trabalho objetivou avaliar os efeitos da temperatura e do alimento no desenvolvimento de D. maurus. Foram realizados oito tratamentos, seis em que os percevejos foram alimentados com sementes de paineira e mantidos a 15, 18, 20, 25 e 30 ± 1ºC, UR 80 ± 3% e fotofase de 12 h ou em condições ambientais de laboratório (23,5 ± 2,6ºC, UR 73,3 ± 9,9 %, e dois em que foram alimentados com sementes de algodão variedade IAC-22 e mantidos a 25 e 30ºC. Em todos os tratamentos foram observados cinco estágios imaturos. O aumento da temperatura proporcionou diminuição do tempo de desenvolvimento. A temperatura de 15ºC foi letal para ovos e ninfas de D. maurus. A menor mortalidade de ninfas ocorreu quando os percevejos foram alimentados com sementes de algodão a 25ºC (24,07%. A menor temperatura base (Tb foi obtida para o 1º ínstar (11,54ºC e a maior para o 2º ínstar (15,33ºC. As fêmeas de D. maurus necessitam de maior quantidade de graus-dias (329,93 graus-dias que os machos (300,49 graus-dias para atingir o estádio adulto.Dysdercus maurus Distant, 1901 (Hemiptera, Pyrrhocoridae is an important pest on Gossypium spp. (cotton tree, Citrus sinensis Osbeck (Rutaceae and Citrus reticulata Blanco (Rutaceae crops. This insect also feeds on seeds of Chorisia speciosa St. Hil. (Bombacaceae. This work aimed to evaluate the effects of temperature and food on the development of D. maurus. Eight treatments were carried out, in six of them bugs were fed with seeds of C. speciosa and kept at 15, 18, 20, 25 and 30 ± 1ºC, 80 ± 3% RH and 12h photophase or in laboratory conditions (23.5 ± 2.6ºC, 73.3 ± 9.9 % RH, and in the other two treatments bugs were fed with seeds of cotton variety

NCG61/24: Plan de Estudios de M??ster en Biomedicina Regenerativa

OpenAIRE

Universidad de Granada

2012-01-01

Plan de Estudios de M??ster en Biomedicina Regenerativa. Resoluci??n de 5 de marzo de 2012, de la Universidad de Granada, por la que se publica el plan de estudios de M??ster en Biomedicina Regenerativa

Descriptions of the immature stages and new host plant records of Notozulia entreriana (Berg) (Hemiptera: Cercopidae) pests of grasses in subtropical areas of the Americas.

Science.gov (United States)

Foieri, Alvaro; Lenicov, Ana M Marino De Remes; Virla, Eduardo G

2016-04-11

Notozulia entreriana (Berg) (Hemiptera: Cercopidae) is one of the most common spittlebugs inhabiting the subtropical region of the America, inflicting important economic damage to grass crops. The immature stages are described and illustrated; the main characteristics that distinguish instars are the body size, color, number of flagellomeres, and number of tibial and metatarsomere spines. A key for identification of nymphs is provided as a tool to develop field studies.  Nine host plants, all belonging to Poaceae, are recorded as breeding and feeding host plants from different localities in northern Argentina.

Estudio de la variabilidad genética en camélidos bolivianos

OpenAIRE

Barreta Pinto, Julia

2013-01-01

El estudio de los camélidos sudamericanos es de gran interés en los países andinoscomo Perú, Bolivia, Chile, Argentina, debido a su importante valor económico y suimportancia en el mantenimiento y desarrollo de las poblaciones rurales en dichos países. Dada la falta de estudios genéticos centrados en las poblaciones de camélidos quehabitan en Bolivia, y la necesidad de realizar una valoración de la diversidad genética deestas poblaciones, la presente Tesis doctoral ha abordado el estudio gené...

The impact of some environmental factors on the fecundity of phenacoccus solenopsis tinsley (hemiptera: pseudococcidae): a serious pest of cotton and other crops

International Nuclear Information System (INIS)

Abbas, G.; Arif, M.J.; Aslam, M.

2010-01-01

Phenacoccus solenopsis Tinsley (Hemiptera: Sternorrhyncha: Pseudococcidae) was first recorded on cultivated cotton from Texas, USA in 1991. Since 2005, this New World species has emerged as serious pest of cotton in Pakistan and India, and is now a serious threat to cotton in China and other cotton-growing countries worldwide. The species is polyphagous and invasive, and can attack many other economic crops. So far, it has been reported from 173 species in 54 plant families, and from 26 countries in different ecological zones. The study found that host plant species and meteorological conditions had significant effects, whereas locality had no significant effect on the fecundity of the mealybug. (author)

Seasonal phenology, spatial distribution, and sampling plan for the invasive mealybug Phenacoccus peruvianus (Hemiptera: Pseudococcidae).

Science.gov (United States)

Beltrá, A; Garcia-Marí, F; Soto, A

2013-06-01

Phlenacoccus peruvianus Granara de Willink (Hemiptera: Pseudococcidae) is an invasive mealybug of Neotropical origin. In recent years it has invaded the Mediterranean Basin causing significant damages in bougainvillea and other ornamental plants. This article examines its phenology, location on the plant and spatial distribution, and presents a sampling plan to determine P. peruvianus population density for the management of this mealybug in southern Europe. Six urban green spaces with bougainvillea plants were periodically surveyed between March 2008 and September 2010 in eastern Spain, sampling bracts, leaves, and twigs. Our results show that P. peruvianus abundance was high in spring and summer, declining to almost undetectable levels in autumn and winter. The mealybugs showed a preference for settling on bracts and there were no significant migrations between plant organs. P. peruvianus showed a highly aggregated distribution on bracts, leaves, and twigs. We recommend abinomial sampling of 200 leaves and an action threshold of 55% infested leaves for integrated pest management purposes on urban landscapes and enumerative sampling for ornamental nursery management and additional biological studies.

ESTUDIO DE FRACCIONES EN CONTEXTOS SONOROS

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Alexander Conde

2016-01-01

Full Text Available En este ensayo resaltamos los vínculos cognitivos entre las matemáticas y la música, que pueden favorecer procesos de enseñanza y aprendizaje de las fracciones en la matemática escolar. Las actividades exhibidas provienen de una investigación que promueve experiencias sensoriales en el campo rítmico para favorecer la construcción de nociones matemáticas. Dichas actividades posibilitan un engranaje armónico entre las matemáticas y la música convergentes en el tiempo y el sonido como los objetos de estudio común entre éstas disciplinas. El análisis de la investigación que aquí reportamos es producto de la aplicación de las actividades en diferentes programas de formación de profesorado de México y Francia, alrededor de la enseñanza y aprendizaje de las matemáticas en contextos interdisciplinarios. Este análisis se desarrolló desde tres categorías referentes a las nociones de unidad relativa, relación parte-parte y equipartición, las cuales son nociones fundamentales para el estudio de las fracciones en la matemática escolar. Encontramos que la enseñanza con enfoque integrador requiere no solo conocimientos especializados, sino un cambio de creencias en torno a las opiniones del profesorado sobre la organización del currículo, su enseñanza y la manera en que aprende la población estudiantil. Un aporte de esta experiencia es ofrecer a docentes elementos teóricos y didácticos para el estudio de las fracciones en contextos interdisciplinarios.

Estudio por espectroscopia Raman-IR del estado de orden en materia carbonosa

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Carbajo Hijarrubia, Juan

2016-01-01

La espectroscopia Raman es una técnica analítica no destructiva y no intrusiva recientemente introducida en el estudio de la paleobiología. En esta línea se pretende emplear está técnica en el estudio de la posible vida en Marte y en el estudio de la vida en la Tierra. El empleo de la espectroscopia micro Raman nos permite analizar en detalle las muestras a la escala típica del grano mineral. La espectroscopia Raman muestra la información vibracional de los grupos moleculares y su ordenamient...

Estudio “Cumple con SAM”

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Escribá MP

2009-06-01

Full Text Available INTRODUCCIÓN Existen estudios que demuestran los beneficios de los sistemas personalizados de dosificación para aumentar la adherencia al tratamiento en pacientes polimedicados. Recientemente se puso en el mercado un sistema de administración de medicamentos (SAM, portable y de pequeño tamaño, que combina un reloj con alarmas programables y varios compartimentos en donde colocar las formas farmacéuticas de los medicamentos. Para la valoración de su utilidad se ha realizado un estudio piloto de satisfacción sobre el SAM entre los pacientes diana de estos dispositivos, solicitando, tras un breve período de uso, su opinión sobre las características del mismo. Se ha evaluando también la mejora del cumplimiento. MATERIAL Y MÉTODOS 43 farmacéuticos comunitarios voluntarios de 26 oficinas de farmacia ubicadas en 5 provincias reclutaron sobre la base de unos criterios de inclusión y exclusión 302 pacientes incumplidores para que utilizasen durante al menos 15 días el SAM y, posteriormente, rellenasen una encuesta de opinión sobre éste. RESULTADOS La opinión del 91% de los pacientes participantes en el estudio es que el SAM es útil, muy útil o imprescindible como sistema de administración de medicamentos. El incumplimiento autocomunicado pasa del 87% al 23% de pacientes. El SAM puede ser útil para los pacientes como sistema de administración de medicamentos en la mejora de la adherencia a su tratamiento farmacológico en la medida en que disminuye los olvidos. Sin embargo, también ponen de manifiesto algunos problemas de diseño mejorables como son el excesivo tamaño, dificultad de apertura e intensidad del sonido. Estos dos últimos problemas dificultan su uso entre la población de mayor edad.

Distribuição espacial de Aphis gossypii (Glover (Hemiptera, Aphididae e Bemisia tabaci (Gennadius biótipo B (Hemiptera, Aleyrodidae em algodoeiro Bt e não-Bt Spatial distribution of Aphis gossypii (Glover (Hemiptera, Aphididae and Bemisia tabaci (Gennadius biotype B (Hemiptera, Aleyrodidae on Bt and non-Bt cotton

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Tatiana Rojas Rodrigues

2010-03-01

Full Text Available Distribuição espacial de Aphis gossypii (Glover (Hemiptera, Aphididae e Bemisia tabaci (Gennadius biótipo B (Hemiptera, Aleyrodidae em algodoeiro Bt e não-Bt. O estudo da distribuição espacial de adultos de Bemisia tabaci e de Aphis gossypii nas culturas do algodoeiro Bt e não-Bt é fundamental para a otimização de técnicas de amostragens, além de revelar diferenças de comportamento de espécies não-alvo dessa tecnologia Bt entre as duas cultivares. Nesse sentido, o experimento buscou investigar o padrão da distribuição espacial dessas espécies de insetos no algodoeiro convencional não-Bt e no cultivar Bt. As avaliações ocorreram em dois campos de 5.000 m² cada, nos quais se realizou 14 avaliações com contagem de adultos da mosca-branca e colônias de pulgões. Foram calculados os índices de agregação (razão variância/média, índice de Morisita e Expoente k da Distribuição Binomial Negativa e realizados os testes ajustes das classes numéricas de indivíduos encontradas e esperadas às distribuições teóricas de freqüência (Poisson, Binomial Negativa e Binomial Positiva. Todas as análises mostraram que, em ambas as cultivares, a distribuição espacial de B. tabaci ajustou-se a distribuição binomial negativa durante todo o período analisado, indicando que a cultivar transgênica não influenciou o padrão de distribuição agregada desse inseto. Já com relação às análises para A. gossypii, os índices de agregação apontaram distribuição agregada nas duas cultivares, mas as distribuições de freqüência permitiram concluir a ocorrência de distribuição agregada apenas no algodoeiro convencional, pois não houve nenhum ajuste para os dados na cultivar Bt. Isso indica que o algodão Bt alterou o padrão normal de dispersão dos pulgões no cultivo.The study of spatial distribution of the adults of Bemisia tabaci and the colonies of Aphis gossypii on Bt and non-Bt cotton crop is fundamental for

Estudio del estado del arte y perspectivas de los metales críticos

OpenAIRE

Lluch Fruns, Nuria

2015-01-01

El presente proyecto esta centrado en el estudio del estado del arte y las perspectivas de los metales críticos, seleccionados por su estado geopolítico, riesgo que supone su escasez en el suministro y su correspondiente riesgo medioambiental. Los metales en los que se basa el siguiente estudio aparecen listados a continuación (por orden alfabético): Antimonio, Berilio, Cobalto, Galio, Indio, Metales del Grupo Platino, Niobio, Tantalio y Tungsteno. El estudio consta de una defi...

The effects of urban warming on herbivore abundance and street tree condition.

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Adam G Dale

Full Text Available Trees are essential to urban habitats because they provide services that benefit the environment and improve human health. Unfortunately, urban trees often have more herbivorous insect pests than rural trees but the mechanisms and consequences of these infestations are not well documented. Here, we examine how temperature affects the abundance of a scale insect, Melanaspis tenebricosa (Comstock (Hemiptera: Diaspididae, on one of the most commonly planted street trees in the eastern U.S. Next, we examine how both pest abundance and temperature are associated with water stress, growth, and condition of 26 urban street trees. Although trees in the warmest urban sites grew the most, they were more water stressed and in worse condition than trees in cooler sites. Our analyses indicate that visible declines in tree condition were best explained by scale-insect infestation rather than temperature. To test the broader relevance of these results, we extend our analysis to a database of more than 2700 Raleigh, US street trees. Plotting these trees on a Landsat thermal image of Raleigh, we found that warmer sites had over 70% more trees in poor condition than those in cooler sites. Our results support previous studies linking warmer urban habitats to greater pest abundance and extend this association to show its effect on street tree condition. Our results suggest that street tree condition and ecosystem services may decline as urban expansion and global warming exacerbate the urban heat island effect. Although our non-probability sampling method limits our scope of inference, our results present a gloomy outlook for urban forests and emphasize the need for management tools. Existing urban tree inventories and thermal maps could be used to identify species that would be most suitable for urban conditions.

Identification of a sex pheromone of the chrysanthemum lace bug Corythucha marmorata (Hemiptera: Tingidae).

Science.gov (United States)

Watanabe, Kisaki; Shimizu, Nobuhiro

2017-08-04

Although the nymphs of Corythucha marmorata form clusters on the undersides of host plant leaves, as frequently observed for Hemiptera, the adults are scattered in the vicinity of the nymph population. By investigating the biological activities of volatile secretions from the adult, we found that the secretions activated male mounting behaviour. A chemical analysis revealed that borneol was a common component of the secretions from both sexes. The absolute configuration of the natural product was the (+)-enantiomer of borneol and the optical isomer was undetectable. Although (+)-borneol showed significant sex pheromone activity against males, the antipode (-)-borneol also induced sex pheromone activity, albeit only slightly. Males may not have a strict identification mechanism based on stereochemistry. To verify the origin of this sex pheromone, we analysed the components of the essential oil of the leaves of Solidago canadensis L. (Compositae: Asteraceae), a host plant; bornyl acetate was detected to be a major component. The plant-produced bornyl acetate had different stereochemistry from the sex pheromone. The results suggested that the adults do not utilise the secondary metabolites of plants but biosynthesise this sex pheromone themselves. This is the first report on sex pheromone identification in Tingidae.

KEBERADAAN DYSMICOCCUS BREVIPES (COCKERELL (HEMIPTERA: PSEUDOCOCCIDAE SEBAGAI VEKTOR PINEAPPLE MEALYBUG WILT-ASSOCIATED VIRUS (PMWAV PADA TANAMAN NANAS

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Dewi Sartiami

2006-04-01

Full Text Available Mealybug can almost be found in all pineapple fields (Ananas comosus (Linnaeus. The insect is known to be a vector of Pineapple Mealybug wilt-associated Virus (PMWaV. The insect samples taken from pineapple in Bunihayu, Jalancagak, Subang, West Java, were identified in laboratory. Mealybug-ant symbionts were also taken. The ability of this ant to carry the mealybugs from colony reared on kabocha (Cucurbita maxima to pineapple was also tested at green house level. Only one spesies of mealybug was found on pineapple, i.e. Dysmicoccus brevipes (Cockerell (Hemiptera: Pseudococcidae. The mealybugs were found to colonize root, basal of stem and the leaf. Eight ant species were found to be associated with mealybug. There are four species belongs to Pseudolasius genera, two species Cardiocondyla genera, Paratrechina sp. and Dorylus sp. Paratrechina sp. showed the ability to carry D. brevipes from kabocha population to pineapple. Therefore the ants should also be controlled in the total management of PMWav.

Identification guide to Nordic aphids associated with mosses, horsetails and ferns (Bryophyta, Equisetophyta, Polypodiophyta (Insecta, Hemiptera, Aphidoidea

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Anders Christian Albrecht

2015-10-01

Full Text Available Keys and diagnoses of North European aphids (Hemiptera, Aphidoidea associated with mosses, horsetails and ferns are given, based on fresh and freeze-dried material. Numerous externally visible and thus informative characters, that are absent in cleared, slide-mounted specimens, such as body shape colours, wax coating and pattern etc., are utilized. Most of the species are illustrated by photographs of live specimens and drawings. Root-feeding species living in the moss layer or otherwise often present in moss samples are also included, even if their hosts were spermatophytes. The combination of colour images and diagnoses, utilizing easily observed characters, allows the identification of a large number of species already in the field, and many more at home with the aid of a stereo microscope. Host plant relationships and association with ants are summarised, including new records. Brief accounts on aphid life cycles, freeze-drying preparation techniques, etc. are also given to support the use of the keys.

Estudio de la viabilidad en la impresión en 3D de piezas poliméricas para elevadores

OpenAIRE

HARO MARTÍ, ALEJANDRO

2016-01-01

[ES] Se realizara el estudio de la viabilidad del uso de la impresión 3D en la sustitución de determinadas piezas utilizadas en instalaciones elevadoras. El estudio abarca desde la selección de la pieza polimérica a sustituir. Estudio de los esfuerzos a los que se ve implicada. Estudio del material empleado y su posible sustitución. Estudio del empleo del proceso de impresión 3D en los posibles materiales disponibles. Estudio económico. Haro Martí, A. (2016). Estudio de la viabilidad en la...

Estudio EPIFARM

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Martín Morales A

2010-12-01

Full Text Available INTRODUCCIÓN Los farmacéuticos comunitarios pueden ser un importante primer punto de contacto con los pacientes con disfunción eréctil (DE, pero hasta la fecha no hay ningún estudio sobre las características de los hombres que acuden a un farmacéutico solicitando consejo o tratamiento para la DE. OBJETIVO Caracterizar los perfiles de los hombres que solicitan tratamiento para la DE en la farmacia, con o sin receta de inhibidores de la fosfodiesterasa tipo 5 (iPDE5. MÉTODOS Entre septiembre y noviembre de 2008 se realizó un estudio observacional, transversal y multicéntrico en farmacias comunitarias de España. De aquellos hombres que solicitaban consejo o tratamiento para la DE, cada investigador reclutó un paciente que tenía receta médica de iPDE5 y otro que acudía sin receta médica. Los farmacéuticos del estudio completaron un cuestionario de datos demográficos, clínicos y conductuales del paciente, incluido el Cuestionario de salud sexual para varones (Sexual Health Inventory for Men. VARIABLES PRINCIPALES Características demográficas y respuestas a los cuestionarios. RESULTADOS 574 farmacéuticos seleccionaron a 1.147 pacientes, de los cuales 1.113 fueron incluidos en el análisis. No se observaron diferencias estadísticas entre los grupos en cuanto al peso, la hipertensión, la diabetes mellitus, la hipercolesterolemia, la dislipidemia, la depresión o el estrés. Tampoco se observaron diferencias estadísticas respecto a la gravedad de la DE (p = 0,7892 ni a la proporción de hombres sin DE en cada grupo (p = 0,5755. En ambos grupos, los pacientes habían presentado síntomas de DE durante una media de veintiséis meses antes de la primera consulta a un profesional sanitario. Para el 60,2% de los pacientes incluidos en el grupo sin receta, la visita a la farmacia fue la primera ocasión en la que habían hablado de su DE con un profesional sanitario, y el 50% de aquellos que habían hablado previamente de la DE lo hab

Galactosemia: Diagnóstico precoz mediante estudio enzimático

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Úrsula Carrillo Estrada

2003-09-01

Full Text Available Se presentan los resultados obtenidos del estudio realizado a un paciente masculino de 45 días de nacido, cuyo motivo de ingreso fue pérdida de peso, decaimiento, retraso psicomotor y crisis de hipoglucemia. Los síntomas comenzaron en el período neonatal y coincidieron con la introducción de la lactancia materna. En estudios realizados se constató en la orina la presencia de lactosa y galactosa. Se confirma el diagnóstico por estudio enzimático. La evolución clínica ha sido satisfactoria. El tratamiento dietético que excluía a los alimentos que contienen galactosa y lactosa fue de mucha importancia. Es el primer caso diagnosticado en Cuba mediante estudio enzimático.This paper presents the results of a study performed on a 45-day old male patient who was admitted to the hospital for weight loss, tiredness, psychomotor retardation and hypoglicemic crisis. The symptoms had begun in the neonatal period and had coincided with the introduction of breast feeding. The studies detected lactose and galactose in urine. The enzymatic study confirmed the diagnosis. The clinical recovery was satisfactory. The dietary treatment that excluded foods containing galactose and lactose was important and successful. He is the first case diagnosed on enzymatic study in Cuba.

Factors affecting water strider (Hemiptera: Gerridae) mercury concentrations in lotic systems

Energy Technology Data Exchange (ETDEWEB)

Jardine, T.D.; Kidd, K.A.; Cunjak, R.A.; Arp, P.A. [University of New Brunswick, St John, NB (Canada). Canadian Rivers Institute

2009-07-15

Water striders (Hemiptera: Gerridae) have been considered as a potential sentinel for mercury (Hg) contamination of freshwater ecosystems, yet little is known about factors that control Hg concentrations in this invertebrate. Striders were collected from 80 streams and rivers in New Brunswick, Canada, in August and September of 2004 through 2007 to assess the influence of factors such as diet, water chemistry, and proximity to point sources on Hg concentrations in this organism. Higher than average Hg concentrations were observed in the southwest and Grand Lake regions of the province, the latter being the location of a coal-fired power plant that is a source of Hg (similar to 100 kg annually), with elevated Hg concentrations in the lichen Old Man's Beard (Usnea spp.) in its immediate vicinity. Across all streams, pH and total organic carbon of water were relatively weak predictors of strider Hg concentrations. Female striders that were larger in body size than males had significantly lower Hg concentrations within sites, suggestive of growth dilution. There was no relationship between percent aquatic carbon in the diet and Hg concentrations in striders. For those striders feeding solely on terrestrial carbon, Hg concentrations were higher in animals occupying a higher trophic level. Mercury concentrations were highly variable in striders collected monthly over two growing seasons, suggesting short-term changes in Hg availability. These measurements highlight the importance of considering both deposition and postdepositional processes in assessing Hg bioaccumulation in this species.

Methodology for electrical studies in industrial networks including the study of electric arc; Metodologia para los estudios electricos en redes industriales incluyendo el estudio de arco electrico

Energy Technology Data Exchange (ETDEWEB)

Rasgado Casique, Jose Pepe; Silva Farias, Jose Luis [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)]. E-mail: jrasgado@iie.org.mx; jlsilva@iie.org.mx

2010-11-15

This article presents a methodology for conducting electrical studies in industrial networks. The methodology included the study of arc flash as a very important area of current basic electrical studies, such as power flow, short circuit and coordination. The aim of this study is to determine the Personal Protective Equipment (PPE) and flash protection boundary for personnel working with or near energized equipment, based on the IEEE Std 1584-2004 and NFPA-70E- 2004. Also included are criteria and recommendations to reduce incident energy level (cal/cm{sup 2}). At work we used a distribution network for industrial type test. The studies were carried out using a commercial program for the analysis of electrical networks. [Spanish] En este articulo se presenta una metodologia para llevar a cabo los estudios electricos en redes industriales. En la metodologia se incluye al estudio de arco electrico como un area muy importante de los estudios electricos basicos actuales, como: flujos de potencia, cortocircuito y coordinacion de protecciones. El objetivo de dicho estudio es determinar el Equipo de Proteccion Personal (EPP) apropiado y los limites de proteccion para el personal que opera con o cerca de equipo energizado, con base en las normas IEEE Std. 1584-2004 y la NFPA-70E-2004. Ademas, se incluyen criterios y recomendaciones para disminuir el nivel de energia incidente (cal/cm{sup 2}). En el trabajo se utilizo una red de distribucion tipo industrial de prueba. Los estudios se llevaron a cabo utilizando un programa comercial para el analisis de redes electricas.

Estudios de usuarios: un enfoque en información deportiva

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Salvador Vázquez-Moctezuma

2016-08-01

Full Text Available Se presenta un trabajo exploratorio relacionado con el desarrollo y análisis de investigaciones sobre el comportamiento informacional en comunidades deportivas. En la metodología se empleó un tipo de investigación descriptiva documental, que permitió una revisión de literatura, método cualitativo y se aplicó la técnica de análisis documental. Se encontró que son limitados los estudios de usuarios en la comunidad deportiva y no son considerados como objeto de estudio de alto impacto. Se concluye, que los profesores, investigadores, entrenadores y atletas tienen un comportamiento informacional que se fundamenta según el desarrollo de sus funciones y usan múltiples recursos de información a su alcance, destacándose el escaso uso de los servicios de biblioteca. Se recomienda el desarrollo de estudios de usuarios en grupos sociales deportivos, con el fin de responder asertivamente con el avance de las ciencias del deporte.

Fluctuación y distribución espacio-temporal de Tuthillia cognata (Hemiptera, Psyllidae y de Ocyptamus persimilis (Diptera, Syrphidae en el cultivo de camu-camu Myrciaria dubia (Myrtaceae en Ucayali, Perú Fluctuation and temporal-spatial distribution of Tuthillia cognata (Hemiptera, Psyllidae and Ocyptamus persimilis (Diptera, Syrphidae on camu-camu Myrciaria dubia (Myrtaceae in Ucayali, Peru

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Diana Pérez

2009-12-01

Full Text Available Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986 (Hemiptera, Psyllidae es una plaga importante en el cultivo de camu-camu, Myrciaria dubia H.B.K. Mc Vaugh (Myrtaceae en la Amazonía Peruana. El objetivo del presente estudio fue determinar la fluctuación y la distribución espacio-temporal de T. cognata y de su controlador biológico Ocyptamus persimilis (Curran, 1930 (Diptera, Syrphidae, entre enero a noviembre del 2004 en los caseríos San Juan y Padre Bernardo, Pucallpa, Ucayali, Perú. El número de ninfas y adultos de T. cognata fue mayor en la época lluviosa que en la seca, pero no en el número de huevos, ni en el número de colonias. Los huevos, ninfas y adultos prefirieron el tercio superior de la planta en comparación con el tercio medio e inferior en ambos caseríos. La excepción fue la presencia de huevos en el caserío San Juan que no mostró preferencias por ninguno de los tercios. No se observaron diferencias en el porcentaje de infestación por T. cognata entre ambos caseríos y entre la época seca y lluviosa. En O. persimilis, no se encontró diferencias en el número de huevos, larvas y pupas entre la época seca y lluviosa. Se observó que los huevos, larvas y pupas prefirieron el tercio superior de la planta en comparación con el tercio medio e inferior en ambos caseríos. Ambas especies, T. cognata y O. persimilis presentaron un patrón de distribución espacial - temporal agregado. Se encontró una relación directa entre el número de colonias de T. cognata y O. persimilis. Sin embargo, el número de huevos, ninfas y adultos de T. cognata no se encontraron correlacionados con el número de huevos, larvas y pupas de O. persimilis.Tuthillia cognata Hodkinson, Brown & Burckhardt, 1986 (Hemiptera, Psyllidae, is a main pest on camu-camu culture Myrciaria dubia H.B.K. Mc Vaugh (Myrtaceae in the Peruvian Amazon. The aim of the current research was to evaluate the fluctuation and spatial and temporal distribution of T

Estudio de las propiedades mecánicas del sistema óseo

OpenAIRE

Alvaro Mendoza G.

2011-01-01

Los estudios adelantados fueron realizados para el área de Biomecánica, tratando de que su desarrollo fuera lo más científico posible; y aplicado al estudio del sistema óseo del hombre, ya que él posee un material que tiene un comportamiento que hace posible las aplicaciones de conceptos mecánicos y físicos de la Ingenlerla para su análisis.

Los estudios sobre paisaje en Estudios Geográficos (1940-2009

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Arroyo Ilera, Fernando

2010-12-01

Full Text Available Not available.Los doscientos sesenta y nueve números editados de esta revista son un excelente banco de pruebas donde observar la evolución y los cambios experimentados por la Geografía española, en los últimos setenta años en los que Estudios Geográficos (EG se viene publicando ininterrumpidamente. La sucesión de temas, su tratamiento y enfoque, las citas bibliográficas, etc., constituyen una excelente referencia de gran interés para cualquier ciencia y, en especial para la nuestra, que ya en otras ocasiones ha sido utilizada para valorar la evolución metodológica de la Geografía.

Cicadas (Hemiptera: Cicadidae) from Camiguin of Mindanao Province and Dinagat Island in the Philippines, with a new genus and three new species.

Science.gov (United States)

Lee, Young June; Marshall, David C; Mohagan, Alma; Hill, Kathy B R

2016-03-30

This paper provides the first faunal checklist for the family Cicadidae (Hemiptera) from Camiguin of Mindanao Province and Dinagat Island in the Philippines, comprising ten species belonging to nine genera. Cryptotympana shillana Lee & Mohagan sp. nov., Orientopsaltria inermis (Stål, 1870), Purana crassinotata Lee, 2015, and Huechys parvula Haupt, 1924 are recorded for the first time from Camiguin. Platypleura dinagatensis Lee sp. nov., Chremistica kyoungheeae Lee, 2010, Dundubia vaginata (Fabricius, 1787), Oncotympana pallidiventris Stål, 1870, and Philipsalta nigrina Lee, Marshall & Hill sp. nov. are newly recorded from Dinagat Island. A new genus Philipsalta Lee, Marshall & Hill gen. nov. is erected. Huechysini Distant, 1905 syn. nov. is synonymized with Cicadettini Buckton, 1889. Information on geographic distributions of the Camiguin and Dinagat species is also provided.

The Complete Mitochondrial Genome of Mindarus keteleerifoliae (Insecta: Hemiptera: Aphididae) and Comparison with Other Aphididae Insects.

Science.gov (United States)

Wang, Yuan; Chen, Jing; Jiang, Li-Yun; Qiao, Ge-Xia

2015-12-17

The mitogenome of Mindarus keteleerifoliae Zhang (Hemiptera: Aphididae) is a 15,199 bp circular molecule. The gene order and orientation of M. keteleerifoliae is similarly arranged to that of the ancestral insect of other aphid mitogenomes, and, a tRNA isomerism event maybe identified in the mitogenome of M. keteleerifoliae. The tRNA-Trp gene is coded in the J-strand and the same sequence in the N-strand codes for the tRNA-Ser gene. A similar phenomenon was also found in the mitogenome of Eriosoma lanigerum. However, whether tRNA isomers in aphids exist requires further study. Phylogenetic analyses, using all available protein-coding genes, support Mindarinae as the basal position of Aphididae. Two tribes of Aphidinae were recovered with high statistical significance. Characteristics of the M. keteleerifoliae mitogenome revealed distinct mitogenome structures and provided abundant phylogenetic signals, thus advancing our understanding of insect mitogenomic architecture and evolution. But, because only eight complete aphid mitogenomes, including M. keteleerifoliae, were published, future studies with larger taxon sampling sizes are necessary.

Plant Essential Oils Synergize and Antagonize Toxicity of Different Conventional Insecticides against Myzus persicae (Hemiptera: Aphididae)

Science.gov (United States)

Faraone, Nicoletta; Hillier, N. Kirk; Cutler, G. Christopher

2015-01-01

Plant-derived products can play an important role in pest management programs. Essential oils from Lavandula angustifolia (lavender) and Thymus vulgaris (thyme) and their main constituents, linalool and thymol, respectively, were evaluated for insecticidal activity and synergistic action in combination with insecticides against green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae). The essential oils and their main constituents exerted similar insecticidal activity when aphids were exposed by direct sprays, but were non-toxic by exposure to treated leaf discs. In synergism experiments, the toxicity of imidacloprid was synergized 16- to 20-fold by L. angustifolia and T. vulgaris essential oils, but far less synergism occurred with linalool and thymol, indicating that secondary constituents of the oils were probably responsible for the observed synergism. In contrast to results with imidacloprid, the insecticidal activity of spirotetramat was antagonized by L. angustifolia and T. vulgaris essential oils, and linalool and thymol. Our results demonstrate the potential of plant essential oils as synergists of insecticides, but show that antagonistic action against certain insecticides may occur. PMID:26010088

Transferrin Family Genes in the Brown Planthopper, Nilaparvata lugens (Hemiptera: Delphacidae) in Response to Three Insecticides.

Science.gov (United States)

Wu, Shun-Fan; Li, Jian; Zhang, Yong; Gao, Cong-Fen

2018-02-09

Transferrins are involved in iron metabolism, immunity, xenobiotics tolerance, and development in eukaryotic organisms including insects. However, little is known about the relationship between transferrins and insecticide toxicology and resistance. Three transferrin family genes, NlTsf1, NlTsf2, and NlTsf3, of the brown planthopper, Nilaparvata lugens (Stål) (Hemiptera: Delphacidae)a major insect pest of rice field in Asia, had been identified and characterized in this study. Quantitative polymerase chain reaction results demonstrated that NlTsf1 was significantly higher than the other two genes in different tissues. All of them were expressed at higher levels in abdomen and head than in antenna, leg, stylet, and thorax. Compared with the control, the expression of three N. lugens transferrin family genes decreased dramatically 24 h after treatment with buprofezin, pymetrozine and imidacloprid. Published by Oxford University Press on behalf of Entomological Society of America 2017. This work is written by (a) US Government employee(s) and is in the public domain in the US.

Two-Spotted Ladybeetle Adalia bipunctata L. (Coleoptera: Coccinellidae): A Commercially Available Predator to Control Asian Citrus Psyllid Diaphorina citri (Hemiptera: Liviidae).

Science.gov (United States)

Khan, Azhar A; Qureshi, Jawwad A; Afzal, Muhammad; Stansly, Philip A

2016-01-01

The Asian citrus psyllid Diaphorina citri Kuwayama (Hemiptera: Liviidae) is an economically important pest of citrus because it serves as a vector of the causal pathogens of huanglongbing (HLB) also known as citrus greening disease. The increased use of insecticides for control of D. citri negatively impacts several natural enemies including some effective ladybeetle species which are not available commercially. The two-spotted ladybeetle, Adalia bipunctata (Coleoptera: Coccinellidae) is found in some crop and forest ecosystems of Asia, Europe and North America and available commercially. It is known to attack aphids and mealybugs but there are no published records of feeding on psyllids. We evaluated suitability and preference of A. bipunctata for nymphs of D. citri compared to corn leaf aphid Rhopalosiphum maidis (Hemiptera: Aphididae) a global pest of cereal crops and prey for many predaceous insects. We also compared development and reproduction of A. bipunctata on these two species with frozen eggs of the Mediterranean flour moth Ephestia kuehniella (Lepidoptera: Pyralidae) at 25°C. Initially, more D. citri than R. maidis nymphs were consumed in the no-choice tests although final consumption by larva and adult of A. bipunctata did not differ in the choice and no-choice tests. Larval development was prolonged by one day on D. citri compared to R. maidis nymphs but did not differ between either of these diets and E. kuehniella. Larval survival to adult averaged 93-100% and was not impacted by diet. Adult life span did not differ between diets although those on D. citri and R. maidis nymphs weighed less and produced fewer but more fertile eggs than on E. kuehniella eggs. Significant reduction of D. citri nymphs averaging 54% was observed in colonies caged with adult A. bipunctata on field planted citrus. R° (net reproductive rate) was least for beetles fed R. maidis, but otherwise there were no significant differences in demographic parameters. Successful

Modelo de estudio de dos informativas familias colombianas con Síndrome de Usher

OpenAIRE

Tamayo ML.; González C.; Gelvez N.

2001-01-01

Establecer y evaluar un modelo de abordaje para el estudio del Síndrome de Usher, que abarca el diagnóstico clínico de los pacientes, establecimiento y confirmación del subtipo mediante estudios moleculares y posterior correlación genotipo-fenotipo.

Estudio de la cultura, sus manifestaciones y efectos en una Red Inter-Organizacional

OpenAIRE

Guevara Alarcon, Laura Natalie

2015-01-01

El presente trabajo tiene como propósito el estudio de la cultura, y el impacto que tiene esta en una red inter-organizacional. Para esto se realizó un estudio documental en el cual se hizo una revisión bibliográfica de los principales conceptos relacionados con la cultura y el enfoque de trabajo en red. Asimismo para dar cumplimiento al objetivo de la investigación, se realizó el análisis de varios estudios empíricos que muestran las relaciones entre cultura y redes y que a su vez re...

Estudio de las propiedades mecánicas del sistema óseo

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Alvaro Mendoza G.

1991-03-01

Full Text Available Los estudios adelantados fueron realizados para el área de Biomecánica, tratando de que su desarrollo fuera lo más científico posible; y aplicado al estudio del sistema óseo del hombre, ya que él posee un material que tiene un comportamiento que hace posible las aplicaciones de conceptos mecánicos y físicos de la Ingenlerla para su análisis.

Modelo de estudio de dos informativas familias colombianas con Síndrome de Usher

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C. González

2001-07-01

Full Text Available Establecer y evaluar un modelo de abordaje para el estudio del Síndrome de Usher, que abarca el diagnóstico clínico de los pacientes, establecimiento y confirmación del subtipo mediante estudios moleculares y posterior correlación genotipo-fenotipo.

Estudios cualitativos en calidad de vida. Teoría y práctica

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Nora Bayo Barroso

2016-06-01

Full Text Available Esta publicación trata de mostrar la importancia del desarrollo de la metodología cualitativa para el estudio de la calidad de vida. Ofrece una reflexión teórica y metodológica de los estudios cualitativos, donde se examina el papel del contexto y la cultura en este tipo de estudios, así como el rol de los investigadores, es pecialmente durante el proceso de incorporación de los más jóvenes a este campo. Presenta diversos proyectos de investigación sobre calidad de vida en los que se han utilizado métodos cualitativos, en diversos ámbitos: geografía, salud, comunidades, juventud, infancia y yoga en la vida laboral. La autora apuesta por la integración de la metodología cuantitativa y cualitativa, mediante el uso de los métodos mixtos, para el estudio de la calidad de vida

Effects of temperature and food on the development of Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae); Efeitos da temperatura e do alimento no desenvolvimento de Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae)

Energy Technology Data Exchange (ETDEWEB)

Almeida, Fabio Souto [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil). Dept. de Ciencias Ambientais], e-mail: fbio_almeida@yahoo.com.br; Goncalves, Lenicio [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil). Dept. de Biologia Animal. Area de Biologia], e-mail: lencygon@globo.com

2007-10-15

Dysdercus maurus Distant, 1901 (Hemiptera, Pyrrhocoridae) is an important pest on Gossypium spp. (cotton tree), Citrus sinensis Osbeck (Rutaceae) and Citrus reticulata Blanco (Rutaceae) crops. This insect also feeds on seeds of Chorisia speciosa St. Hil. (Bombacaceae). This work aimed to evaluate the effects of temperature and food on the development of D. maurus. Eight treatments were carried out, in six of them bugs were fed with seeds of C. speciosa and kept at 15, 18, 20, 25 and 30 {+-} 1 deg C, 80 {+-} 3% RH and 12h photo phase or in laboratory conditions (23.5 {+-} 2.6 deg C, 73.3 {+-} 9.9 % RH), and in the other two treatments bugs were fed with seeds of cotton variety IAC-22 and kept at 25 or 30 deg C. In all treatments five immature stages were observed. The increase of temperature caused reduction in the developmental time. The temperature of 15 deg C disabled nymphal eclosion and was also lethal to those nymphs ecloded at other temperatures. The lower mortality of nymphs occurred in the temperature of 25 deg C with cotton as food (24.07%). The lower threshold temperature (Tb) occurred for the first instar (11.54 deg C) and the higher for the second instar (15.33 deg C). The females of D. maurus required more degree-days (329.93 degree-days) than males (300.49 degree-days) until adult emergence. (author)

Estudio de la carga económica de la infertilidad femenina por anovulación en un hospital público de México: estudio piloto

OpenAIRE

Martínez-Núñez, Juan Manuel; Altagracia-Martínez, Marina; Kravzov-Jinich, Jaime; Hinojosa-Cruz, Juan Carlos; Sánchez-Sánchez, Betsabé; Díaz de León-Castañeda, Christian

2012-01-01

El objetivo del presente estudio fue determinar los costos totales de la infertilidad femenina por anovulación en pacientes atendidas en el Hospital de Gineco-Obstetricia "La Raza". Se realizó un estudio transversal y observacional. Se incluyeron 30 mujeres mayores de 18 años con infertilidad por anovulación tratadas con citrato de clomifeno o anastrozol. Los costos se estimaron mediante el proceso de micro-costeo, la aplicación de un cuestionario de 20 items y la revisión de expedientes médi...

The Damage Capacity of Mahanarva spectabilis (Distant, 1909 (Hemiptera: Cercopidae Adults on Brachiaria ruziziensis Pasture

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Tiago Teixeira Resende

2013-01-01

Full Text Available The aim of this study was to determine the damage caused by adult Mahanarva spectabilis (Distant, 1909 (Hemiptera: Cercopidae on Brachiaria ruziziensis (Germain & Evard under field conditions. A total of 0, 4, 8, 12, or 16 M. spectabilis adults per plot were maintained for 6 days. Thereafter, the insects were removed from the plant, and the following parameters were evaluated: chlorophyll content, damage score, dry as well as fresh weights, percentage of shoots’ dry matter, and the forage’s ability to regrow. The chlorophyll content was significantly reduced; the damage score and percentage of dry matter in plants increased depending on the increased insect infestation density after 6 days of exposure. In contrast, no change was observed on the B. ruziziensis fresh and dry weights as well as the regrowth capacity depending on the M. spectabilis infestation densities. Attacks by 8 adult M. spectabilis per clump of B. ruziziensis with an average of 80 tillers for 6 days were sufficient to reduce the chlorophyll content and the functional plant loss index. This density can be a reference for spittlebug integrated management in Brachiaria.

Homicidas juveniles en Bogotá, estudio de grupos focales

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Franklin Escobar Córdoba

2015-07-01

Materiales y Métodos. Estudio cualitativo mediante técnica de grupos focales. Resultados. Se encontró como el factor de riesgo más implicado la disponibilidad y uso de armas. Otros  factores de riesgo determinantes de la conducta delincuencial afectan la disposición del joven homicida para tener un comportamiento criminal y las estrategias de control que son elegidas por el individuo, dichos factores son apreciados de maneras distintas por los jóvenes homicidas y los no homicidas Conclusión. Este estudio arroja información clave que puede ser utilizada en el diseño e implementación de estrategias para enfrentar el homicidio juvenil como problema de salud pública.

ESTUDIO MULTICÉNTRICO LONGITUDINAL DE DEPLECIÓN DE LINFOCITOS B EN LUPUS ERITEMATOSO SISTÉMICO REFRACTARIO: ESTUDIO LESIMAB

OpenAIRE

Nieves-Martín, Laura

2014-01-01

Cohorte multicéntrica retrospectiva de pacientes con LES refractario a terapia estándar que fueron tratados con rituximab. Estudio de efectividad y seguridad tras uno o varios cursos de tratamiento. Así mismo análisis lipídico básico de los pacientes antes y después del tratamiento.

Ciclo de vida de Anasa litigiosa (Hemiptera: Heteroptera: Coreidae Life cycle of Anasa litigiosa (Hemiptera: Heteroptera: Coreidae

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Adriana Chacón-López

2012-06-01

Full Text Available El objetivo de este trabajo es el estudio del ciclo de vida de Anasa litigiosa Stål. Se recolectaron ejemplares adultos de esta especie que se encontraban sobre plantas de chayote y fueron cultivados en el laboratorio utilizando hojas, tallos y frutos de la misma planta. Se describen e ilustran en detalle todos los estadios de vida, incluyendo notas sobre su biología. Anasa litigiosa se ha recolectado sobre bromeliáceas y cucurbitáceas y es una plaga importante de estas últimas.The aim of this work was the study of the life cycle of Anasa litigiosa Stål. Adults were collected on chayote and they were reared in laboratory using leaves, stems and fruits of chayote. Descriptions and illustrations of all instars of, and notes on its biology are included. This species has been collected in bromeliads and on cucurbits, it is an important pest of cucurbits in Mexico.

Molecular markers reveal infestation dynamics of the bed bug (Hemiptera: Cimicidae) within apartment buildings.

Science.gov (United States)

Booth, Warren; Saenz, Virna L; Santangelo, Richard G; Wang, Changlu; Schal, Coby; Vargo, Edward L

2012-05-01

The bed bug, Cimex lectularius L. (Hemiptera: Cimicidae), has experienced an extraordinary global resurgence in recent years, the reasons for which remain poorly understood. Once considered a pest of lower socioeconomic classes, bed bugs are now found extensively across all residential settings, with widespread infestations established in multiapartment buildings. Within such buildings, understanding the population genetic structure and patterns of dispersal may prove critical to the development of effective control strategies. Here, we describe the development of 24 high-resolution microsatellite markers through next generation 454 pyrosequencing and their application to elucidate infestation dynamics within three multistory apartment buildings in the United States. Results reveal contrasting characteristics potentially representative of geographic or locale differences. In Raleigh, NC, an infestation within an apartment building seemed to have started from a single introduction followed by extensive spread. In Jersey City, NJ, two or more introductions followed by spread are evident in two buildings. Populations within single apartments in all buildings were characterized by high levels of relatedness and low levels of diversity, indicative of foundation from small, genetically depauperate propagules. Regardless of the number of unique introductions, genetic data indicate that spread within buildings is extensive, supporting both active and human-mediated dispersal within and between adjacent rooms or apartments spanning multiple floors.

Exposure to Guava Affects Citrus Olfactory Cues and Attractiveness to Diaphorina citri (Hemiptera: Psyllidae).

Science.gov (United States)

Barman, Jagadish Chandra; Campbell, Stuart A; Zeng, Xinnian

2016-06-01

Intercropping can reduce agricultural pest incidence, and represents an important sustainable alternative to conventional pest control methods. Understanding the ecological mechanisms for intercropping could help optimize its use, particularly in tropical systems which present a large number of intercropping possibilities. Citrus is threatened worldwide by greening disease (huanglongbing, HLB) vectored by the Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae). Control of HLB and citrus psyllid can be partially achieved through intercropping with guava, Psidium guajava L., but the mechanisms remain unclear. We tested the hypothesis that guava olfactory cues affect psyllid behavior by altering the attractiveness of citrus through plant-plant interactions. In choice and no-choice cage experiments, psyllid settlement was reduced on citrus shoots that had been exposed to guava shoot odors for at least 2 h. In Y-tube olfactometer experiments, psyllids oriented to odors of unexposed, compared with guava-exposed, citrus shoots. These behavioral results indicate that a mechanism for the success of guava intercropping for sustainable, ecological disease management may be the indirect effect of guava on citrus attractiveness. © The Authors 2016. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Understanding trophic interactions of Orius spp. (Hemiptera: Anthocoridae) in lettuce crops by molecular methods.

Science.gov (United States)

Gomez-Polo, Priscila; Alomar, Oscar; Castañé, Cristina; Aznar-Fernández, Thaïs; Lundgren, Jonathan G; Piñol, Josep; Agustí, Nuria

2016-02-01

The aphid Nasonovia ribisnigri (Mosley) (Hemiptera: Aphididae) and the thrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) are common pests in Mediterranean lettuce crops, where Orius spp. are common generalist predators. Predation by Orius spp. was studied in a lettuce plot by conventional polymerase chain reaction (PCR) and real-time PCR analyses using specific primers of both main pests. Also, high-throughput sequencing was used to have a wider approach of the diet of these predators in natural field conditions. Molecular analyses indicated a higher predation on N. ribisnigri in spring and on F. occidentalis in summer. Predation on alternative prey, like Collembola, was also found in both seasons. Real-time PCR was more sensitive than conventional PCR in showing the target trophic links, whereas high-throughput sequencing revealed predation on other natural enemies - intraguild predation (IGP), showing other trophic interactions of Orius majusculus within the studied ecosystem. This study gives important information about the trophic relationships present in Mediterranean lettuce crops in different periods of the year. The detected predation by Orius spp. on alternative prey, as well as on other natural enemies, should be further investigated to clarify whether it adds or detracts to the biological control of N. ribisnigri and F. occidentalis. © 2015 Society of Chemical Industry.

Estudio de eficiencia de una acería en Sestao

OpenAIRE

Pindado Cebrián, Javier

2014-01-01

El objetivo final del proyecto es la realización de un estudio que permita optimizar la eficiencia de una instalación de aire comprimido, instalada en una planta de producción de acero, reduciendo de este modo, el consumo energético de la misma. La instalación objeto de estudio cuenta con dos salas independientes que generan el caudal demandado por la instalación. Una de ellas, la que más caudal genera, consta de seis compresores, mientras que la otra está equipada con cuatro máquinas. ...

Análisis y estudio del radar Ramet AD9

OpenAIRE

López Jiménez, José Manuel

2009-01-01

El proyecto está basado en un estudio completo y detallado del radar RAMET modelo AD9. Las autoridades de tráfico catalanas, a través del Servei Català del Trànsit, están introduciendo en nuestras carreteras este tipo de cinemómetro desde el año 2007, para el control de tráfico en carretera. El hecho de ser una novedad dentro de nuestro entorno hace que su desconocimiento sobre su composición y sus peculiaridades respecto a otro tipo de radares sea interesante realizar este estudio....

La inteligencia emocional en jóvenes universitarios: un estudio descriptivo

OpenAIRE

Vera Pedroza, A.; Alejandre Espinosa, M.; Piña Vázquez, D.L.; Segura Hernández, A.

2016-01-01

El estudio desarrolla el tema de la inteligencia emocional en estudiantes pertenecientes a la Facultad de Pedagogía de la Universidad Veracruzana, campus Poza Rica-Tuxpan, Veracruz, México; durante el periodo agosto 2015-enero 2016. Siendo el objetivo principal del trabajo determinar el nivel de inteligencia emocional de los alumnos universitarios y su relación en el contexto escolar. La metodología utilizada en el estudio fue de corte cuantitativa-descriptiva, que se caracteriza por recabar ...

Laboratory Evaluation of Different Insecticides against Hibiscus Mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae

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Samman Fatima

2016-01-01

Full Text Available Hibiscus mealybug, Maconellicoccus hirsutus (Hemiptera: Pseudococcidae, is the major pest of many vegetables, fruits, crops, and ornamental plants causing losses to the farmers and its control has been an issue of significance in the pest management. This study was aimed at evaluating different concentrations (0.06%, 0.1%, and 0.14% of Telsta, Advantage, Talstar, Imidacloprid, and their mixtures against hibiscus mealybug in the Laboratory of Systematics and Pest Management at University of Gujrat, Pakistan. The toxic effect was evaluated in the laboratory bioassay after 24 and 48 h of the application of insecticides. The highest mortality (95.83% was shown by Talstar and Talstar + Imidacloprid at the concentration of 0.14% after 48 h followed by Advantage + Talstar with 87.50% mortality at 0.14% concentration after 48 h of application. The study also showed that the least effective treatment observed was Advantage + Telsta with no mortality after 24 h and 25% mortality after 48 h at 0.14% concentration. The study revealed that the concentration 0.14% was highly effective in lowering the mealybug population and insecticide mixtures were effective in reducing mealybug density. The study emphasizes the use of such insecticide mixtures to develop better management strategy for mealybug populations attacking ornamental plants. However effects of such insecticide mixtures on other organisms and biological control agents should be checked under field conditions.

The Hemiptera (Insecta) of Canada: Constructing a Reference Library of DNA Barcodes

Science.gov (United States)

Gwiazdowski, Rodger A.; Foottit, Robert G.; Maw, H. Eric L.; Hebert, Paul D. N.

2015-01-01

DNA barcode reference libraries linked to voucher specimens create new opportunities for high-throughput identification and taxonomic re-evaluations. This study provides a DNA barcode library for about 45% of the recognized species of Canadian Hemiptera, and the publically available R workflow used for its generation. The current library is based on the analysis of 20,851 specimens including 1849 species belonging to 628 genera and 64 families. These individuals were assigned to 1867 Barcode Index Numbers (BINs), sequence clusters that often coincide with species recognized through prior taxonomy. Museum collections were a key source for identified specimens, but we also employed high-throughput collection methods that generated large numbers of unidentified specimens. Many of these specimens represented novel BINs that were subsequently identified by taxonomists, adding barcode coverage for additional species. Our analyses based on both approaches includes 94 species not listed in the most recent Canadian checklist, representing a potential 3% increase in the fauna. We discuss the development of our workflow in the context of prior DNA barcode library construction projects, emphasizing the importance of delineating a set of reference specimens to aid investigations in cases of nomenclatural and DNA barcode discordance. The identification for each specimen in the reference set can be annotated on the Barcode of Life Data System (BOLD), allowing experts to highlight questionable identifications; annotations can be added by any registered user of BOLD, and instructions for this are provided. PMID:25923328

Molecular and Morphological Identification of Mealybug Species (Hemiptera: Pseudococcidae) in Brazilian Vineyards

Science.gov (United States)

Pacheco da Silva, Vitor C.; Bertin, Aline; Blin, Aurélie; Germain, Jean-François; Bernardi, Daniel; Rignol, Guylène; Botton, Marcos; Malausa, Thibaut

2014-01-01

Mealybugs (Hemiptera: Pseudococcidae) are pests constraining the international trade of Brazilian table grapes. They damage grapes by transmitting viruses and toxins, causing defoliation, chlorosis, and vigor losses and favoring the development of sooty mold. Difficulties in mealybug identification remain an obstacle to the adequate management of these pests. In this study, our primary aim was to identify the principal mealybug species infesting the major table grape-producing regions in Brazil, by morphological and molecular characterization. Our secondary aim was to develop a rapid identification kit based on species-specific Polymerase Chain Reactions, to facilitate the routine identification of the most common pest species. We surveyed 40 sites infested with mealybugs and identified 17 species: Dysmicoccus brevipes (Cockerell), Dysmicoccus sylvarum Williams and Granara de Willink, Dysmicoccus texensis (Tinsley), Ferrisia cristinae Kaydan and Gullan, Ferrisia meridionalis Williams, Ferrisia terani Williams and Granara de Willink, Phenacoccus baccharidis Williams, Phenacoccus parvus Morrison, Phenacoccus solenopsis Tinsley, Planococcus citri (Risso), Pseudococcus viburni (Signoret), Pseudococcus cryptus Hempel, four taxa closely related each of to Pseudococcus viburni, Pseudococcus sociabilis Hambleton, Pseudococcus maritimus (Ehrhorn) and Pseudococcus meridionalis Prado, and one specimen from the genus Pseudococcus Westwood. The PCR method developed effectively identified five mealybug species of economic interest on grape in Brazil: D. brevipes, Pl. citri, Ps. viburni, Ph. solenopsis and Planococcus ficus (Signoret). Nevertheless, it is not possible to assure that this procedure is reliable for taxa that have not been sampled already and might be very closely related to the target species. PMID:25062012

Spatiotemporal Dynamics of Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) in Commercial Watermelon Crops.

Science.gov (United States)

Lima, Carlos H O; Sarmento, Renato A; Galdino, Tarcísio V S; Pereira, Poliana S; Silva, Joedna; Souza, Danival J; Dos Santos, Gil R; Costa, Thiago L; Picanço, Marcelo C

2018-04-16

Spatiotemporal dynamics studies of crop pests enable the determination of the colonization pattern and dispersion of these insects in the landscape. Geostatistics is an efficient tool for these studies: to determine the spatial distribution pattern of the pest in the crops and to make maps that represent this situation. Analysis of these maps across the development of plants can be used as a tool in precision agriculture programs. Watermelon, Citrullus lanatus (Thunb.) Matsum. and Nakai (Cucurbitales: Cucurbitaceae), is the second most consumed fruit in the world, and the whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is one of the most important pests of this crop. Thus, the objective of this work was to determine the spatiotemporal distribution of B. tabaci in commercial watermelon crops using geostatistics. For 2 yr, we monitored adult whitefly densities in eight watermelon crops in a tropical climate region. The location of the samples and other crops in the landscape was georeferenced. Experimental data were submitted to geostatistical analysis. The colonization of B. tabaci had two patterns. In the first, the colonization started at the outermost parts of the crop. In the second, the insects occupied the whole area of the crop since the beginning of cultivation. The maximum distance between sites of watermelon crops in which spatial dependence of B. tabaci densities was observed was 19.69 m. The adult B. tabaci densities in the eight watermelon fields were positively correlated with rainfall and relative humidity, whereas wind speed negatively affected whiteflies population.

Degree Day Requirements for Kudzu Bug (Hemiptera: Plataspidae), a Pest of Soybeans.

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Grant, Jessica I; Lamp, William O

2018-04-02

Understanding the phenology of a new potential pest is fundamental for the development of a management program. Megacopta cribraria Fabricius (Hemiptera: Plataspidae), kudzu bug, is a pest of soybeans first detected in the United States in 2009 and in Maryland in 2013. We observed the phenology of kudzu bug life stages in Maryland, created a Celsius degree-day (CDD) model for development, and characterized the difference between microhabitat and ambient temperatures of both kudzu, Pueraria montana (Lour.) Merr. (Fabales: Fabaceae) and soybeans, Glycine max (L.) Merrill (Fabales: Fabaceae). In 2014, low population numbers yielded limited resolution from field phenology observations. We observed kudzu bug populations persisting within Maryland; but between 2013 and 2016, populations were low compared to populations in the southeastern United States. Based on the degree-day model, kudzu bug eggs require 80 CDD at a minimum temperature of 14°C to hatch. Nymphs require 545 CDD with a minimum temperature of 16°C for development. The CDD model matches field observations when factoring a biofix date of April 1 and a minimum preoviposition period of 17 d. The model suggests two full generations per year in Maryland. Standard air temperature monitors do not affect model predictions for pest management, as microhabitat temperature differences did not show a clear trend between kudzu and soybeans. Ultimately, producers can predict the timing of kudzu bug life stages with the CDD model for the use of timing management plans in soybean fields.

Molecular Characterization and Expression Profiles of Polygalacturonase Genes in Apolygus lucorum (Hemiptera: Miridae.

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Lili Zhang

Full Text Available Polygalacturonase (PG is an enzyme in the salivary glands of piercing-sucking mirid bugs (Hemiptera: Miridae that plays a key role in plant feeding and injury. By constructing a full-length cDNA library, we cloned and characterized 14 PG genes from the salivary glands of Apolygus lucorum, a pestiferous mirid bug in cotton, fruit trees and other crops in China. BLAST search analysis showed that the amino acid sequences deduced from transcripts of the PG genes were closely related to PGs from other mirid bugs. Phylogenetic analysis showed that the PGs of mirid bugs had six main branches, PG1-PG6 (Genbank accession numbers: KF881899~KF881912. We investigated the mRNA expression patterns of the A. lucorum PG genes using real-time PCR. All 14 PGs were expressed significantly higher in the salivary glands than in other tissues (head, thorax, abdomen, leg and wing. For eggs and nymphs, the expression levels of these PGs were much higher in the 5th instar stage than in the egg, and 1st and 3rd instar stages. The PG expression levels in 1-day-old adults were very low, and increased in 5, 20 and 30-day-old adults. Additionally, PG expression levels were generally similar between males and females. The possible physiological functions of PGs in A. lucorum were discussed.

Effects of gamma irradiation on different stages of mealybug Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae)

International Nuclear Information System (INIS)

The, Doan Thi; Khanh, Nguyen Thuy; Lang, Vo Thi Kim; Van Chung, Cao; An, Tran Thi Thien; Thi, Nguyen Hoang Hanh

2012-01-01

Utilization of phytosanitary irradiation as a potential treatment to disinfest agricultural commodities in trade has expanded rapidly in the recent years. Cobalt-60 gamma ray target doses of 100, 150, 200 and 250 Gy were used to irradiate immatures and adults of Dysmicoccus neobrevipes (Beardsley) (Hemiptera: Pseudococcidae) infesting dragon fruits to find the most tolerant stage and the most optimal dose range for quarantine treatment. In general, irradiation affected significantly all life stages of D. neobrevipes mortality and adult reproduction. The pattern of tolerance to irradiation in D. neobrevipes was 1st instars<2nd instars<3rd instars< adults, in which the adult is the most tolerant stage. Based on obtained results after 21 days of irradiation, predicted doses for 100% mortality of each different development stage in the above mentioned pattern were 224.6, 241.3, 330.9 and 581.5 Gy, respectively. No survived female adult produced offspring at 200 and 250 Gy. Dose range between 200 and 250 Gy could be efficient to prevent the reproduction of this mealybug. - Highlights: → Gamma Co-60 irradiation as a potential phytosanitary for quarantine treatments. → Reproduction ability of D. neobrevipes has been efficiently inhibited at low dose. → Pattern of tolerance to irradiation was 1st<2nd<3rd instars< adults. → Doses from 200 to 250 Gy could be efficient to prevent the reproduction of mealybug.

Effects of gamma irradiation on different stages of mealybug Dysmicoccus neobrevipes (Hemiptera: Pseudococcidae)

Energy Technology Data Exchange (ETDEWEB)

The, Doan Thi, E-mail: doanthithe@yahoo.com [Research and Development Center for Radiation Technology, Vietnam Atomic Energy Institute, 202A Street 11, Linh Xuan Ward, Thu Duc District, Ho Chi Minh City (Viet Nam); Khanh, Nguyen Thuy; Lang, Vo Thi Kim; Van Chung, Cao [Research and Development Center for Radiation Technology, Vietnam Atomic Energy Institute, 202A Street 11, Linh Xuan Ward, Thu Duc District, Ho Chi Minh City (Viet Nam); An, Tran Thi Thien; Thi, Nguyen Hoang Hanh [Agriculture and Forestry University, Linh Trung Ward, Thu Duc District, Ho Chi Minh City (Viet Nam)

2012-01-15

Utilization of phytosanitary irradiation as a potential treatment to disinfest agricultural commodities in trade has expanded rapidly in the recent years. Cobalt-60 gamma ray target doses of 100, 150, 200 and 250 Gy were used to irradiate immatures and adults of Dysmicoccus neobrevipes (Beardsley) (Hemiptera: Pseudococcidae) infesting dragon fruits to find the most tolerant stage and the most optimal dose range for quarantine treatment. In general, irradiation affected significantly all life stages of D. neobrevipes mortality and adult reproduction. The pattern of tolerance to irradiation in D. neobrevipes was 1st instars<2nd instars<3rd instars Gamma Co-60 irradiation as a potential phytosanitary for quarantine treatments. > Reproduction ability of D. neobrevipes has been efficiently inhibited at low dose. > Pattern of tolerance to irradiation was 1st<2nd<3rd instars Doses from 200 to 250 Gy could be efficient to prevent the reproduction of mealybug.

New record of Helopeltis bradyi Waterhouse and Pachypeltis maesarum Kirkaldy (Hemiptera: Miridae on tea Camellia sinensis L.O. (Kuntze in southern India

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Kodakkadan SRIKUMAR

2017-03-01

Full Text Available Helopeltis theivora commonly called as tea mosquito bug (TMB is considered as important pest of tea in South India. Extensive survey in tea plantations of Anamallais, recorded H. bradyi and Pachypeltis maesarum (Hemiptera: Miridae causing considerable damage and were registered for the first time on tea. Their occurrence was seen in association with H. theivora. There was considerable variation among these species in size of the circular rings formed by rostral piercing, indicating that these three species can be easily demarcated based on the observation of feeding punctures even in field condition. As the dosage and recommendations of insecticides against TMB in tea in south India was pertaining only to H. theivora the addition of H. bradyi and P. maesarum will improve the future pest management strategies.

First report of Maconellicoccus hirsutus (Green, 1908) (Hemiptera: Coccoidea: Pseudococcidae) and the associated parasitoid Anagyrus kamali Moursi, 1948 (Hymenoptera: Encyrtidae), in Brazil.

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Marsaro Júnior, A L; Peronti, A L B G; Penteado-Dias, A M; Morais, E G F; Pereira, P R V S

2013-05-01

The pink hibiscus mealybug (PHM), Maconellicoccus hirsutus (Green) (Hemiptera: Pseudococcidae) and the associated hymenopterous parasitoid, Anagyrus kamali Moursi, 1948 (Hymenoptera: Encyrtidae), are reported for the first time in Brazil. Specimens of the PHM were collected on nine hosts plants, Annona muricata L. (Anonnaceae), Glycine max (L.) Merr. (Fabaceae), Centrolobium paraensis Tul. (Fabaceae), Inga edulis Mart. (Fabaceae), Hibiscus rosa-sinensis L. (Malvaceae), Psidium guajava L. (Myrtaceae), Averrhoa carambola L. (Oxalidaceae), Citrus sinensis (L.) Osbeck (Rutaceae) and Solanum lycopersicum L. (Solanaceae), in four municipalities in the north-northeast of the state of Roraima. The plants C. paraensis, I. edulis and C. sinensis are recorded for the first time as a hosts for PHM. Characteristic injuries observed on the host plants infested by PHM and suggestions for its management are presented.

Phenology of the Pine Bark Adelgid, Pineus strobi (Hemiptera: Adelgidae), in White Pine Forests of Southwestern Virginia.

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Wantuch, Holly A; Kuhar, Thomas P; Salom, Scott M

2017-12-08

The pine bark adelgid, Pineus strobi Hartig (Hemiptera: Adelgidae), is a native herbivore of eastern white pine, Pinus strobus L. (Pinales: Pinaceae), in eastern North America. P. strobi does not appear to have any dominant overwintering lifestage in southwest Virginia, as it does in its northern range. Eggs can be found consistently from late March through early December and may be produced sporadically later throughout the winter during warm periods. Two distinct generations were observed in the spring, after which life stage frequencies overlapped. Adult body size varied seasonally and was greatest in the spring. The present study constitutes the first recording of phenological details of the P. strobi in its southern range, informing biological control efforts aimed at closely related invasive pests. The phenological plasticity observed between northern and southern P. strobi populations provides insight into the potential effects of climate on the population dymanics of this and related species. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Nitrogen in Hydroponic Growing Medium of Tomato Affects the Demographic Parameters of Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae).

Science.gov (United States)

Hosseini, R S; Madadi, H; Hosseini, M; Delshad, M; Dashti, F

2015-12-01

We evaluated the effects of different nitrogen levels (380, 310, 240, and 174 ppm) on the life history parameters of Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) on hydroponically cultured tomato plants. Our data show that there is a positive correlation between the nitrogen content and the demographic parameters, as the intrinsic rate of increase of T. vaporariorum was the lowest (0.059 ± 0.007 day(-1)) at 174 ppm and the highest (0.088 ± 0.005 day(-1)) at 380 ppm of nitrogen. The net reproduction rate (R 0), finite rate of increase (λ), and mean developmental time (T) were significantly influenced by the nitrogen levels. The mean longevity of males and females showed a positive relationship with the nitrogen level, ranging from 64.8 ± 3.96 to 76.3 ± 2.44 for males and 61.6 ± 5.35 to 71.2 ± 2.44 for females, observed in the lowest and highest nitrogen levels, respectively. The relationship between nitrogen fertilization and T. vaporariorum management on tomato crops is discussed.

LOS ESTUDIOS DE POBREZA URBANA

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Rina De León Herrera

2007-08-01

Full Text Available En este artículo se intenta mostrar en forma sucinta la evolución de los estudios de pobreza urbana; se retoma para ello la producción escritural de investigadores que han hecho aportes valiosos sobre la temática en diferentes épocas y espacios geográficos. La información se ha organizado en dos unidades de análisis: la producción escritural en los países desarrollados y en los países en desarrollo.

Motivación hacia el estudio y la cultura escolar: Estado de la cuestión

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Ana María Gálvez Fernández

2006-01-01

Full Text Available En este artículo se presenta una revisión de los estudios y reflexiones en torno a la motivación hacia el estudio y la cultura escolar. Se analizaron publicaciones referidas a reportes de investigación y ensayos teóricos publicados entre 1994 y 2005. Los resultados y conclusiones fueron reseñados y organizados en una matriz que permitió categorizar las variables abordadas en los estudios tanto en motivación hacia el estudio como en cultura escolar. En las variables se encontraron aspectos que hacen referencia por un lado con los tipos de motivación: intrínseca, extrínseca y social; referidos a los factores desencadenantes de cada tipo de motivación respecto a las tareas escolares y el estudio en general, así como algunos estilos y estrategias de motivación que las escuelas implementan para elevar el desempeño de sus estudiantes. Por otro lado, están los aspectos de la cultura escolar a nivel de los elementos que la constituyen, la influencia en los procesos de enseñanza-aprendizaje y motivación hacia el estudio, así como el impacto de la cultura social, los medios y las tecnologías. El balance plantea interrogantes acerca de la correlación entre la motivación hacia el estudio y los factores de la cultura escolar

An??lisis geoestad??stico en el estudio de la explotaci??n de los recursos minerales

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Chica Olmo, Mario

1987-01-01

La Tesis Doctoral del Sr. Chica Olmo constituye una aproximaci??n geoestad??stica al estudio de explotaci??n de los recursos minerales de modo que en la memoria se recogen las principales conclusiones metodol??gicas te??ricas y practicas alcanzadas a trav??s de diferentes estudios y proyectos llevados a cabo en el dominio minero referentes a dep??sitos de naturaleza variada como carb??n uranio plomo plata... En gran medida los anteriores estudios han sido realizados en el centro de geoestad??...

Ítems politómicos vs. dicotómicos : un estudio metodológico

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López Pina, José Antonio

2005-01-01

En este estudio se comparan cinco formatos de respuesta para ítems politómicos, desde el formato original que consta de cuatro categorías a un formato dicotómico (sólo dos categorías de respuesta). La comparación de distintos análisis psicométricos (análisis de ítems, estudio de la fiabilidad, análisis de componentes principales y estudio de la habilidad) entre los cinco formatos prueba que un formato dicotómico aporta casi tanta información sobre la calidad del tests y las puntuaciones obser...

Characterization and functional assay of a fatty acyl-CoA reductase gene in the scale insect, Ericerus pela Chavannes (Hemiptera: Coccoidae).

Science.gov (United States)

Hu, Yan-Hong; Chen, Xiao-Ming; Yang, Pu; Ding, Wei-Feng

2018-04-01

Ericerus pela Chavannes (Hemiptera: Coccoidae) is an economically important scale insect because the second instar males secrete a harvestable wax-like substance. In this study, we report the molecular cloning of a fatty acyl-CoA reductase gene (EpFAR) of E. pela. We predicted a 520-aa protein with the FAR family features from the deduced amino acid sequence. The EpFAR mRNA was expressed in five tested tissues, testis, alimentary canal, fat body, Malpighian tubules, and mostly in cuticle. The EpFAR protein was localized by immunofluorescence only in the wax glands and testis. EpFAR expression in High Five insect cells documented the recombinant EpFAR reduced 26-0:(S) CoA and to its corresponding alcohol. The data illuminate the molecular mechanism for fatty alcohol biosynthesis in a beneficial insect, E. pela. © 2017 Wiley Periodicals, Inc.

Contribución al estudio de los reacciones de hidratación del cemento portland por espectroscopia infrarroja II. Estudio de clínkeres y de cementos portland anhidros

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Vázquez-Moreno, Tomás

1976-06-01

Full Text Available Not availableEn un artículo anterior (1 se dio cuenta de los trabajos realizados sobre la aplicación de la espectroscopia IR al estudio de las principales fases sintetizadas del clínker de cemento portland como fase previa al estudio de diversos clínkeres, obtenidos por nosotros en el laboratorio a partir de crudos industriales, y de distintos cementos portland comerciales anhidros.

A new species of the genus Eurhadina Haupt (Hemiptera: Auchenorrhyncha: Cicadellidae: Typhlocybinae) from Korea, with a key to Korean species.

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Oh, Sumin; Lim, Jongok; Jung, Sunghoon

2016-04-11

The leafhopper genus Eurhadina Haupt, 1929 belongs to the tribe Typhlocybini of subfamily Typhlocybinae (Hemiptera: Auchenorrhyncha: Cicadellidae). Currently, genus Eurhadina includes 3 subgenera, Eurhadina Haupt 1929, Singhardina Mahmood 1967, Zhihadina Yang & Li 1991. A total of 20 valid species of subgenus Eurhadina have been described in the Nearctic and Palaearctic region and the subgenus Singhardina includes 57 species in the Oriental and Palaearctic region (Huang & Zhang 1999, Dworakowska 2002). The subgenus Zhihadina includes only 1 species from China (Yang & Lee, 1991). So far, four species of subgenus Eurhadina were recorded in the Korean Peninsula (Kwon & Huh 2001): Eurhadina (Eurhadina) betularia Anufriev, 1969, E. (E.) koreana Dworakowska, 1971, E. (E.) pulchella (Fallen, 1806), and E. (E.) wagneri Dworakowska, 1969. The majority of species belonging to the subgenus Eurhadina are difficult to distinguish by external appearance because the color patterns of the forewings are very similar among species.

Storage of Euschistus heros Eggs (Fabricius) (Hemiptera: Pentatomidae) in Liquid Nitrogen for Parasitization by Telenomus podisi Ashmead (Hymenoptera: Platygastridae).

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Favetti, B M; Butnariu, A R; Doetzer, A K

2014-06-01

Records in the literature with regard to the influence of freezing of pentatomid eggs on parasitism by microhymenopterans are scarce. In this research, we compared the storage of Euschistus heros (Fabricius) (Hemiptera: Pentatomidae) eggs in liquid nitrogen for different periods with the objective of optimizing the multiplication of Telenomus podisi Ashmead (Hymenoptera: Platygastridae) in the laboratory. Fresh eggs of E. heros were exposed (S3, S6) or not (NS3, NS6) to UV light for 30 min and stored in 1.5-mL plastic vials in liquid nitrogen either for 3 (S3, NS3) or 6 months (S6, NS6), and egg suitability to parasitoid development was compared to control eggs exposed (SC) or not (NSC) to UV treatment. Global data analysis showed that E. heros eggs stored in liquid nitrogen with or without UV treatment, for 3 or 6 months, were suitable for T. podisi parasitization.

Morphology of the European species of the aphid genus Eulachnus (Hemiptera: Aphididae: Lachninae) - A SEM comparative and integrative study.

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Kanturski, Mariusz; Karcz, Jagna; Wieczorek, Karina

2015-09-01

Scanning electron microscopy (SEM) methods were used for the first time to elucidate the external morphology of the European species of the genus Eulachnus (Hemiptera: Aphididae: Lachninae), a representative genus of the conifer-feeding aphids tribe Eulachnini. We examined and compared the external morphology of apterous and alate viviparous females from the parthenogenetic generation as well as oviparous females and alate males belonging to the sexual generation. FE-SEM images based on HMDS and cryo-SEM preparation techniques revealed better image quality than the CPD technique in regard to surface tension and morphological signs of cell deteriorations (i.e., existence of depressions, drying artifacts and membrane blebs). Three morphologically different species groups "agilis", "brevipilosus" and "cembrae" were proposed due to the differences in head, antennae, legs and dorsal chaetotaxy as well as dorsal sclerotization. The most characteristic features and differences of representatives of these groups are presented and discussed. Copyright © 2015 Elsevier Ltd. All rights reserved.

Differences in bacterial diversity of host-associated populations of Phylloxera notabilis Pergande (Hemiptera: Phylloxeridae) in pecan and water hickory.

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Medina, R F; Nachappa, P; Tamborindeguy, C

2011-04-01

Host-associated differentiation (HAD) is the presence of genetically divergent, host-associated populations. It has been suggested that microbial symbionts of insect herbivores may play a role in HAD by allowing their insect hosts to use different plant species. The objective of this study was to document if host-associated populations of Phylloxera notabilis Pergande (Hemiptera: Phylloxeridae) in pecan and water hickory corresponded with differences in the composition of their associated bacteria. To test this hypothesis, we characterized the symbionts present in P. notabilis associated with these two tree species through metagenomic analyses using 454 sequencing. Differences in bacterial diversity were found between P. notabilis populations associated with pecan and water hickory. The bacteria, Pantoea agglomerans and Serratia marcescens, were absent in the P. notabilis water hickory population, whereas both species accounted for more than 69.72% of bacterial abundance in the pecan population. © 2011 The Authors. Journal of Evolutionary Biology © 2011 European Society For Evolutionary Biology.

Factors affecting colonization and abundance of Aphis gossypii glover (hemiptera: aphididae on okra plantations Fatores que afetam a colonização e abundância de Aphis gossypii glover (Hemiptera: Aphididae em plantações de quiabeiro

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Germano Leão Demolin Leite

2007-04-01

Full Text Available The control of Aphis gossypii Glover (Hemiptera: Aphididae on okra Abelmoschus esculentus (L. (Malvaceae consist primarily in the use of insecticides, due to the lack of information on other mortality factors. The objective of this study was to determine the effects of predators and parasitoids, height of canopy, plant age, leaf areas, organic compounds leaves, levels of leaf nitrogen and potassium, density of leaf trichomes, total rainfall and median temperature on attack intensity of A. gossypii on two successive A. esculentus var. Santa Cruz plantations. Monthly number estimates of A. gossypii and natural enemies (visual inspection occurred on bottom, middle and apical parts of 30 plants/plantation (one leaf/plant. Plants senescence, leaf areas and natural enemies, mainly Adialytus spp., spiders and Coccinellidae, were some of the factors that most contributed to aphid reduction. A higher number of aphids was found on the bottom part than medium and apical parts of okra plants. Total rainfall can reduce the aphid population. Trichomes non-glandular or low density, organic compounds leaves and levels of N and K were not important for reducing aphid population.O controle de Aphis gossypii Glover (Hemiptera: Aphididae em quiabeiro Abelmoschus esculentus (L. (Malvaceae consiste principalmente no uso de inseticidas, em virtude da falta de informação sobre outros fatores de mortalidade. Objetivou-se com este estudo determinar os efeitos de predadores e parasitóides, altura de dossel, idade da planta, área foliar, compostos orgânicos foliares, níveis de nitrogênio e potássio, densidade de tricomas, pluviosidade e temperatura na intensidade de ataque de A. gossypii em dois cultivos sucessivos de Abelmoschus esculentus var. Santa Cruz. Estimou-se, mensalmente, o número de A. gossypii e de inimigos naturais (inspeção visual ocorridos nas folhas (uma folha/planta localizadas nas partes basal, mediana e apical de 30 plantas/plantação. Os

Estudio epidemiológico de la dermatitis atópica desde la farmacia comunitaria: Estudio DAFAC

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Moreno P.

2014-03-01

Full Text Available Objetivos: Diseñar y evaluar la utilidad de un protocolo de actuación del farmacéutico comunitario ante las consultas realizadas sobre dermatitis atópica en la farmacia comunitaria, acordando con dermatólogos los criterios de derivación. Conocer los motivos de consulta más habituales y determinar en qué casos constituyen motivo de derivación al médico. Métodos: Estudio epidemiológico realizado en farmacias comunitarias españolas entre febrero del 2011 y enero del 2012. Se incluyeron en el estudio todos los usuarios de las farmacias que consultan un problema de salud dermatológico. Los farmacéuticos participantes, tras recibir formación específica online, aplicaron el protocolo de actuación consensuado. Se registraron los motivos de consulta, los casos de derivación al médico, la existencia de sobreinfecciones, el uso de productos adecuados para el cuidado de la piel. Resultados/Discusión: Participaron 259 farmacéuticos de 15 comunidades autónomas que registraron 688 intervenciones válidas. La distribución por sexo de los pacientes corresponde a 354 (51,5 % de sexo masculino y 334 (48,5 % del femenino, con mayor incidencia de la patología en menores de 14 años. En el 70% de los casos no se requirió la derivación al dermatólogo. Motivos de consulta: prurito, irritación, dificultad para dormir, ansiedad y estrés, y sobreinfección (35%, principal causa de derivación. La elaboración y difusión del protocolo y criterios de derivación, así como los resultados del estudio a los socios de SEFAC (Sociedad Española de Farmacia Comunitaria y al resto de farmacéuticos comunitarios permitirán la resolución de muchos de los casos de dermatitis atópica, contribuyendo así a la mejora de la calidad de vida del paciente.

Estudio comparativo de alexitimia en personas institucionalizadas versus aula de mayores

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Julia García-Sevilla

2016-04-01

Full Text Available La experiencia y regulación de las emociones son aspectos que están adquiriendo mayor importancia a la hora de entender y fomentar el bienestar y la calidad de vida de las personas mayores. El objetivo del presente estudio ha sido llevar a cabo un estudio comparativo de la alexitimia en usuarios pertenecientes a un centro institucionalizado de personas mayores y alumnos matriculados en el aula de mayores. Los participantes del estudio fueron 43 personas institucionalizadas y 48 personas pertenecientes al aula de mayores con una media de edad de 69.30 años y una desviación típica de 66.50. El instrumento utilizado fue la versión adaptada del TAS-20. Los resultados mostraron que las personas institucionalizadas puntuaban más alto en la dificultad para identificar sentimientos, dificultad para describir sentimientos así como en el patrón de pensamiento orientado a lo externo. El sexo fue indiferente en la dificultad para identificar sentimientos, en la dificultad para describir sentimientos así como en el patrón orientado a lo externo. En cuanto a la edad, se encontró una relación con la dificultad para identificar sentimientos y el patrón de pensamiento orientado a lo externo. El estudio permite concluir que la alexitimia se ve influida por el hecho de que la persona mayor se encuentre en un centro institucionalizado.

Contexto actual de los estudios preclínicos

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Thelvia I. Ramos

2016-09-01

Full Text Available El desarrollo acelerado de la Industria Biofarmacéutica, y en particular de la producción de biológicos, ha permitido el incremento de la investigación clínica, teniendo en consideración la novedad de las sustancias que se desarrollan. El éxito de un producto solo se logra a través de la realización de los estudios clínicos controlados, lo cual significa que este ha sido validado a través de un sistema de gestión de calidad, principal determinante para que la molécula en estudio, pueda ser autorizada y comercializada posterior a la demostración de su seguridad y eficacia. Previo a la presentación de una solicitud para un nuevo producto ante las autoridades regulatorias, es necesario pasar por la etapa de investigación preclínica.

Motivación y Hábitos de estudio en estudiantes de la Universidad Alas Peruanas, Filial Juliaca

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Quispe Tapia, David

2017-01-01

El objetivo de la presente tesis es sustentar la influencia de la motivación en el habito de estudio en los estudiantes de la Universidad Alas Peruana, filial Juliaca. Asimismo, conocer de qué manera influye la motivación intrínseca y la motivación extrínseca en los hábitos de estudio. Los métodos y el estudio corresponde al tipo cualitativo, básico y con un diseño descriptivo correlacional, con una población de estudio de 160 estudiantes de los cuales se obtuvo una muestra ...

La estiba y desestiba portuaria. Un estudio desde el Derecho Administrativo.

OpenAIRE

Menéndez de la Cruz, Cristina

2015-01-01

La estiba y desestiba en el entorno portuario no ha sido analizada desde la óptica del Derecho Administrativo, por lo que a mi juicio era pertinente hacer un estudio dada la significación que el fenómeno tiene para el conjunto de la economía. No ha ocurrido lo mismo en otras disciplinas jurídicas, como el Derecho Laboral y el Mercantil, pudiendo encontrar numerosos estudios sobre esta materia. Esto es debido al carácter de zona fronteriza del Derecho que adoptan algunos temas, como apunta el ...

Estudio del balance energético en velocistas de alto rendimiento

OpenAIRE

Lorente Gutiérrez, Jesús

2015-01-01

El objetivo de este estudio fue evaluar el balance energético en tres atletas de alto rendimiento durante 28 días, que coincidieron con el periodo competitivo de pista cubierta. La ingesta energética fue estudiada a partir de registros alimentarios durante los 28 días. Del mismo modo, el gasto energético fue estimado por tres métodos, mediante registros de actividad durante 28 días, mediante el estudio del ritmo metabólico basal estudiado por calorimetría indirecta, aplicándole el fa...

Modelo explicativo del bajo rendimiento escolar: un estudio con adolescentes mexicanos

OpenAIRE

Caso Niebla, Joaquín; Hernández Guzmán, Laura

2010-01-01

A fin de contribuir al estudio de las variables autoestima, establecimiento de metas, habilidades de estudio, adaptación escolar, asertividad y consumo de sustancias en el rendimiento académico de estudiantes de bachillerato en México, se propuso la presente investigación. Participaron 1581 estudiantes de una institución de educación media superior pública de la Ciudad de México con una edad promedio de 17.4 años. El tipo de muestreo utilizado fue el método aleatorio simple considerando como ...

A summary of eight traits of Coleoptera, Hemiptera, Orthoptera and Araneae, occurring in grasslands in Germany

Science.gov (United States)

Gossner, Martin M.; Simons, Nadja K.; Achtziger, Roland; Blick, Theo; Dorow, Wolfgang H. O.; Dziock, Frank; Köhler, Frank; Rabitsch, Wolfgang; Weisser, Wolfgang W.

2015-03-01

Analyses of species traits have increased our understanding of how environmental drivers such as disturbances affect the composition of arthropod communities and related processes. There are, however, few studies on which traits in the arthropod community are affected by environmental changes and which traits affect ecosystem functioning. The assembly of arthropod traits of several taxa is difficult because of the large number of species, limited availability of trait databases and differences in available traits. We sampled arthropod species data from a total of 150 managed grassland plots in three regions of Germany. These plots represent the spectrum from extensively used pastures to mown pastures to intensively managed and fertilized meadows. In this paper, we summarize information on body size, dispersal ability, feeding guild and specialization (within herbivores), feeding mode, feeding tissue (within herbivorous suckers), plant part (within herbivorous chewers), endophagous lifestyle (within herbivores), and vertical stratum use for 1,230 species of Coleoptera, Hemiptera (Heteroptera, Auchenorrhyncha), Orthoptera (Saltatoria: Ensifera, Caelifera), and Araneae, sampled by sweep-netting between 2008 and 2012. We compiled traits from various literature sources and complemented data from reliable internet sources and the authors’ experience.

Acizzia solanicola (Hemiptera: Psyllidae) probing behaviour on two Solanum spp. and implications for possible pathogen spread

Science.gov (United States)

Valenzuela, Isabel; Trebicki, Piotr; Powell, Kevin S.; Vereijssen, Jessica; Norng, Sorn

2017-01-01

Piercing-sucking insects are vectors of plant pathogens, and an understanding of their feeding behaviour is crucial for studies on insect population dynamics and pathogen spread. This study examines probing behaviour of the eggplant psyllid, Acizzia solanicola (Hemiptera: Psyllidae), using the electrical penetration graph (EPG) technique, on two widespread and common hosts: eggplant (Solanum melongena) and tobacco bush (S. mauritianum). Six EPG waveforms were observed: waveform NP (non-probing phase), waveform C (pathway phase), G (feeding activities in xylem tissues), D (first contact with phloem tissues), E1 (salivation in the sieve elements) and E2 (ingestion from phloem tissues). Results showed that A. solanicola is predominantly a phloem feeder and time spent in salivation and ingestion phases (E1 and E2) differed between hosts. Feeding was enhanced on eggplant compared to tobacco bush which showed some degree of resistance, as evidenced by shorter periods of phloem ingestion, a higher propensity to return to the pathway phase once in the sieve elements and higher number of salivation events on tobacco bush. We discuss how prolonged phloem feeding could indicate the potential for A. solanicola to become an important pest of eggplant and potential pathogen vector. PMID:28575085

Remote sensing and spatial statistical techniques for modelling Ommatissus lybicus (Hemiptera: Tropiduchidae) habitat and population densities.

Science.gov (United States)

Al-Kindi, Khalifa M; Kwan, Paul; R Andrew, Nigel; Welch, Mitchell

2017-01-01

In order to understand the distribution and prevalence of Ommatissus lybicus (Hemiptera: Tropiduchidae) as well as analyse their current biographical patterns and predict their future spread, comprehensive and detailed information on the environmental, climatic, and agricultural practices are essential. The spatial analytical techniques such as Remote Sensing and Spatial Statistics Tools, can help detect and model spatial links and correlations between the presence, absence and density of O. lybicus in response to climatic, environmental, and human factors. The main objective of this paper is to review remote sensing and relevant analytical techniques that can be applied in mapping and modelling the habitat and population density of O. lybicus . An exhaustive search of related literature revealed that there are very limited studies linking location-based infestation levels of pests like the O. lybicus with climatic, environmental, and human practice related variables. This review also highlights the accumulated knowledge and addresses the gaps in this area of research. Furthermore, it makes recommendations for future studies, and gives suggestions on monitoring and surveillance methods in designing both local and regional level integrated pest management strategies of palm tree and other affected cultivated crops.

Remote sensing and spatial statistical techniques for modelling Ommatissus lybicus (Hemiptera: Tropiduchidae habitat and population densities

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Khalifa M. Al-Kindi

2017-08-01

Full Text Available In order to understand the distribution and prevalence of Ommatissus lybicus (Hemiptera: Tropiduchidae as well as analyse their current biographical patterns and predict their future spread, comprehensive and detailed information on the environmental, climatic, and agricultural practices are essential. The spatial analytical techniques such as Remote Sensing and Spatial Statistics Tools, can help detect and model spatial links and correlations between the presence, absence and density of O. lybicus in response to climatic, environmental, and human factors. The main objective of this paper is to review remote sensing and relevant analytical techniques that can be applied in mapping and modelling the habitat and population density of O. lybicus. An exhaustive search of related literature revealed that there are very limited studies linking location-based infestation levels of pests like the O. lybicus with climatic, environmental, and human practice related variables. This review also highlights the accumulated knowledge and addresses the gaps in this area of research. Furthermore, it makes recommendations for future studies, and gives suggestions on monitoring and surveillance methods in designing both local and regional level integrated pest management strategies of palm tree and other affected cultivated crops.

ESTUDIO SOBRE LA DINÁMICA TEMPORAL DE MATERIAL PARTICULADO PM 10 EMITIDO EN COCHABAMBA, BOLIVIA

OpenAIRE

Salini Calderón, Giovanni Angelo; Medina Mitma, Evelin Jhovana

2017-01-01

RESUMEN En este documento se presenta un estudio de series temporales de PM10 que muestran la mala calidad del aire en Cochabamba, mediante parámetros estadísticos usados en estudios sobre dinámica no lineal. El promedio diario de PM10 sigue patrones similares al de grandes ciudades que poseen altos índices de contaminación ambiental. Uno de los parámetros resultó del mismo orden y característica que los presentados en trabajos similares sobre el estudio de caoticidad en variables de contamin...

Bioefficacy of gamma radiation on Phenacoccus solenopsis (Hemiptera: pseudococcidae)

International Nuclear Information System (INIS)

Zarin, Mahtab; Zubeda; Seth, R.K.; Seth, Ranjana

2012-01-01

Ionizing radiation can be considered as a possible alternative for treating agricultural products to overcome quarantine barriers against the Solenopsis mealy bug, Phenacoccus solenopsis (Hemiptera: Pseudococcidae). Exposure of ionizing radiation is one of the quarantine treatments which penetrate commodities quickly and most commodities can tolerate irradiation at doses that kill the pest. Evaluation of various bio-characteristics (survival, metamorphosis and reproductive potential) of Phenacoccus solenopsis irradiated in various life stages was attempted to ascertain the lethal doses and sublethal doses having sterilizing potential. A dose of 40Gy administered to the first instar nymph (N 1 ) inhibited formation of adult male, whereas 100Gy checked the transformation of N 1 up to adult female. Males exhibited short life span and appeared to have no or limited role in progeny formation. Males were more radio-sensitive than the female mealy bugs. Further, in case of N 2 treatment, a dose of 100Gy completely inhibited adult male formation, and 150 Gy could completely inhibit male adult formation. The sexes were discernible only after N 2 . A dose of 500Gy given to female-N 3 totally inhibited adult formation. The developmental period of female N 3 was protracted with increase in radiation dosage. The efficacy of radiation at dose range, 5-300Gy, was evaluated on N 3 and N 4 male nymphs. Irradiation affected metamorphosis and reduced adult formation. For instance, a dose of 300Gy caused 0% male adult development from N 4 . 400Gy was almost sterilizing dose for 11-12 day old female mealy bug, and this sterilizing dose reduced oviposition by 28.1%; whereas 200Gy was found to induce sterility in 5-6 day old female mealy bug, with about 50% reduction in oviposition. The freshly emerged female adults (0-1 day old) was the most sensitive stage than the adult mealy bugs in their older phase, and it was completely sterilized by 40Gy. The data suggests a definite role of

Giardiasis intestinal: estudio de 60 pacientes Intestinal giardiasis: study of 60 patients

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Nuris Rodríguez Vargas

2006-06-01

Full Text Available Se investiga, en un período de tiempo de 6 meses, a 60 pacientes en edades comprendidas entre 1 y 14 años. Los pacientes provenían del área de salud del Policlínico «19 de Abril» y acudieron a consulta por presentar vómitos y dolor abdominal de forma aislada o conjunta. Se analizaron variables como la edad y el sexo y se realizaron estudios relacionados con la búsqueda de enfermedades enterales por parásitos protozoarios, específicamente ocasionadas por Giardias lamblia. Para ello se indicó estudio parasitológico de las heces, estudio parasitológico del contenido duodenal mediante intubación, examen radiológico contrastado de esófago, estómago y duodeno y análisis de la inmunidad humoral. El mayor número de niños estaba en el grupo de 1 a 4 años (28 pacientes y le siguieron en frecuencia los de 5 a 8 años (20 niños. Predominó el sexo masculino con un total de 38 pacientes. El hallazgo de Giardias lamblia en las heces recién emitidas se registró en más de la mitad de los casos (33 pacientes, mientras que el estudio duodenal fue positivo en 45 pacientes, lo cual evidencia un mayor valor diagnóstico en el análisis del aspirado duodenal. Los resultados de la radiografía de estómago y duodeno detectaron 41 casos de duodenitis, lo cual corroboró los hallazgos de la exploración física. En 43 pacientes se pudo realizar un estudio de inmunoelectroforesis y 29 de ellos presentaron disminución de la IgA.

Aportes de los estudios de género a las ciencias sociales

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Loreto Rebolledo

2014-06-01

Full Text Available Este artículo presenta un recorrido de los aportes y trayectorias de los estudios de género para el caso chileno, a partir de la revisión de las principales transformaciones en este campo a nivel mundial y su influencia sobre América Latina. A partir de la década de 1970, las ciencias sociales entran en una crisis donde no solo se ponen en entredicho los grandes paradigmas explicativos, sino también los modos de acceso y construcción del conocimiento. Las visiones universalistas comienzan a ser cuestionadas ante la aparición de las políticas de la identidad tras el debate generado por los movimientos sociales y sus reivindicaciones específicas, entre ellos, el movimiento feminista de los países del primer mundo, cuyas críticas a la influencia de la variable de género en la construcción del conocimiento dan origen a los estudios de la mujer, antecedente directo de lo que conocemos hoy como estudios de género. Estos estudios, construidos a partir de la permanente crítica y revisión por parte de las/os investigadoras/es del campo, han aportado nuevas miradas, temas y formas de abordaje interdisciplinario, contribuyendo así a la revitalización de las ciencias sociales en el mundo, pero, sobre todo en el contexto latinoamericano. En este artículo se da cuenta de estos aportes, mostrando el desarrollo de los estudios de mujer y género en Chile y, revisando el contexto general en que surgieron; su instalación en el país; sus principales aportes y los desafíos que enfrentan en la actualidad.

Characterizing Damage of Brown Marmorated Stink Bug (Hemiptera: Pentatomidae) in Blueberries.

Science.gov (United States)

Wiman, Nik G; Parker, Joyce E; Rodriguez-Saona, Cesar; Walton, Vaughn M

2015-06-01

Brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), is a severe economic pest of growing importance in the United States, Canada, and Europe. While feeding damage from H. halys has been characterized in tree fruit, vegetables, and agronomic crops, less is known about the impacts of stink bugs on small fruits such as blueberries. In this study, we examined H. halys feeding on two representative early and late ripening blueberry cultivars in Oregon and New Jersey. This research examined how different densities of H. halys confined on blueberry clusters for week-long periods affected fruit quality at harvest. After fruit were ripe, we stained and quantified the number of salivary sheaths on berries as an indication of feeding pressure. Feeding by H. halys damaged the fruits by causing increased levels of external discoloration, and internal damage in the form of tissue necrosis. Exposure of berries to H. halys was also associated with decreasing berry weights and lower soluble solids in fruits. However, the different cultivars did not respond consistently to feeding pressure from H. halys. Weekly variability in feeding pressure of two of the cultivars as quantified by the number of stylet sheaths per berry was largely accounted for by environmental variables. We conclude that H. halys does have potential to severely damage blueberries and may become an important economic pest. Characterization of damage is important because correct identification of insect damage is key for successful management. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Prevalensi cendawan entomopatogenik, Neozygites fumosa (Speare Remaudie’re & Keller (Zygomycetes: Entomophthorales pada populasi kutu putih, Paracoccus marginatus Williams & Granara De Willink (Hemiptera: Pseudococcidae di wilayah Bogor

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Anik Nurhayati

2015-09-01

Full Text Available The prevalence of entomopathogenic fungus, Neozygites fumosa (Zygomycetes: Entomo-phthorales on the papaya mealybug, Paracoccus marginatus (Hemiptera: Pseudococcidae, was studied in Bogor in two districts: Bubulak and Rancabungur in 2011. Thirty plants of either papaya or cassavas were sampled 8 times, once a week for insect population and biweekly for the fungus infection sampling. The results showed that the cassava mealybug was not found on both plants and all locations. The populations of papaya mealybug in Bubulak were higher than in Rancabungur. The populations of papaya mealybug on papaya were higher than those of cassava. However, N. fumosa infection levels on both plants and both locations were not significantly different.

Estudio de las cualidades inmunoestimulantes de nuevas bacterias probióticas asociadas al cultivo de lv

OpenAIRE

Gullian, Mariel; Rodríguez, Jenny

2002-01-01

Estudio de las cualidades inmunoestimulantes de nuevas bacterias probióticas asociadas al cultivo de LV Estudio de las cualidades inmunoestimulantes de nuevas bacterias probióticas asociadas al cultivo de LV

Facultative symbiont Hamiltonella confers benefits to Bemisia tabaci (Hemiptera: Aleyrodidae), an invasive agricultural pest worldwide.

Science.gov (United States)

Su, Qi; Oliver, Kerry M; Pan, Huipeng; Jiao, Xiaoguo; Liu, Baiming; Xie, Wen; Wang, Shaoli; Wu, Qingjun; Xu, Baoyun; White, Jennifer A; Zhou, Xuguo; Zhang, Youjun

2013-12-01

Bacterial symbionts infect most insect species, including important pests such as whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), and often exert important effects on host ecology. The facultative symbiont Hamiltonella is found at high frequencies in the B. tabaci MED (type: Mediterranean-MED) in China. The prevalence of this symbiont in natural populations suggests beneficial effects of infection or manipulation of host reproduction. To date, however, no empirical studies on the biological role of Hamiltonella on the host B. tabaci have been reported. Here, we investigated the effects of Hamiltonella infection on the sex ratio and several fitness parameters in B. tabaci MED by comparing Hamiltonella-infected whiteflies with Hamiltonella-free ones. We found that Hamiltonella-infected whiteflies produced significantly more eggs, exhibited significantly higher nymphal survival, faster development times, and larger adult body size in comparison with Hamiltonella-free whiteflies, while no evidence of reproductive manipulation by Hamiltonella were found in B. tabaci MED. In conclusion, Hamiltonella infection substantially enhanced B. tabaci MED performance. This beneficial role may, at least partially, explain the high prevalence of Hamiltonella in B. tabaci MED populations and may also contribute to their effectiveness in spread of the plant pathogens tomato yellow leaf curl virus.

El estudio académico de lo esotérico

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José Ricardo Chaves Pacheco

2015-01-01

Full Text Available Este artículo se divide en dos partes. Primero, analiza el desarrollo lingüístico e histórico de los conceptos esotérico y esoterismo, proceso que evolucionó a una incipiente “conciencia histórica” entre los propios esoteristas, influenciada por el influjo historicista romántico, que conformó un nuevo tipo de esoterismo en tiempos de ciencia, democracia y modernidad. Y segundo, explica el proceso de transformación disciplinaria de los estudios de lo esotérico, el esoterismo y la esoterología hasta la imposición de la categoría académica de los “estudios de esoterismo occidental”.

Estudios culturales y cine en España Cultural Studies and film in Spain

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Manuel Palacio Arranz

2007-10-01

Full Text Available Este trabajo presenta el uso de las metodologías de los estudios culturales por los docentes e investigadores españoles. Estas metodologías de trabajo todavía resultan periféricas en los estudios de cine en España; sin embargo, está creciendo el número de publicaciones genéricamente adscritas a planteamientos culturalistas; en especial,y lo han hecho los estudios sobre el público del cine y los de género, y en menor medida los de recepción fílmica, la representación de los estereotipos y recientemente los estudios transnacionales. This paper presents the use of the different methodologies in cultural studies by Spanish researchers and academics. These working methodologies are still peripheral in film studies in Spain, although the number of publications generically adhering to cultural studies viewpoints are increasing, above all those studies concerning film audience or gender and, to a lesser extent, those dealing with film reception, stereotype representation and more recently transnational studies.

Molecular and morphological identification of mealybug species (Hemiptera: Pseudococcidae in Brazilian vineyards.

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Vitor C Pacheco da Silva

Full Text Available Mealybugs (Hemiptera: Pseudococcidae are pests constraining the international trade of Brazilian table grapes. They damage grapes by transmitting viruses and toxins, causing defoliation, chlorosis, and vigor losses and favoring the development of sooty mold. Difficulties in mealybug identification remain an obstacle to the adequate management of these pests. In this study, our primary aim was to identify the principal mealybug species infesting the major table grape-producing regions in Brazil, by morphological and molecular characterization. Our secondary aim was to develop a rapid identification kit based on species-specific Polymerase Chain Reactions, to facilitate the routine identification of the most common pest species. We surveyed 40 sites infested with mealybugs and identified 17 species: Dysmicoccus brevipes (Cockerell, Dysmicoccus sylvarum Williams and Granara de Willink, Dysmicoccus texensis (Tinsley, Ferrisia cristinae Kaydan and Gullan, Ferrisia meridionalis Williams, Ferrisia terani Williams and Granara de Willink, Phenacoccus baccharidis Williams, Phenacoccus parvus Morrison, Phenacoccus solenopsis Tinsley, Planococcus citri (Risso, Pseudococcus viburni (Signoret, Pseudococcus cryptus Hempel, four taxa closely related each of to Pseudococcus viburni, Pseudococcus sociabilis Hambleton, Pseudococcus maritimus (Ehrhorn and Pseudococcus meridionalis Prado, and one specimen from the genus Pseudococcus Westwood. The PCR method developed effectively identified five mealybug species of economic interest on grape in Brazil: D. brevipes, Pl. citri, Ps. viburni, Ph. solenopsis and Planococcus ficus (Signoret. Nevertheless, it is not possible to assure that this procedure is reliable for taxa that have not been sampled already and might be very closely related to the target species.

Feeding preference ofNezara viridula (Hemiptera: Pentatomidae and attractiveness of soybean genotypes

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Efrain de Santana Souza

2013-12-01

Full Text Available Nezara viridula (L. (Hemiptera: Pentatomidae is a cosmopolitan insect that causes economic damages to several cultures, in particular soybeans (Glycine max [L.] Merr. Among the techniques that involve Integrated Pest Management, the resistance of plants is pointed as a tool of great value and can contribute to the reduction of populations of insects. The feeding preferences of adults of southern green stink bug (N. viridula, and the attractiveness of soybean genotypes were evaluated under laboratory conditions to detect the most resistant material against attack from this insect. A choice test, using mature grains and green pods of the genotypes was carried out, in which the number of individuals attracted in different periods was counted. Feeding preference was evaluated in the choice tests using green pods and the number of pricks and the average time spent feeding by pricks were evaluated. In addition, texture and trichome density in the green pods were evaluated. The mature grains of 'TMG 117RR' and 'TMG 121RR' were less attractive to the adults of N. viridula. Regarding the green pods, 'IAC 17' and PI 227687 were less attractive; 'IAC 17' and 'IAC PL1' were less consumed, indicating the feeding non-preference as a resistance mechanism. 'IAC 17', 'TMG-117RR' and PI 227687 presented high levels of trichome density, and in 'IAC 17' this morphological characteristic was considered to be the main resistance factor against N. viridula. These results may be useful for breeding programs that focus on the resistance of soybeans to insects.

Dispersion patterns and sampling plans for Diaphorina citri (Hemiptera: Psyllidae) in citrus.

Science.gov (United States)

Sétamou, Mamoudou; Flores, Daniel; French, J Victor; Hall, David G

2008-08-01

The abundance and spatial dispersion of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) were studied in 34 grapefruit (Citrus paradisi Macfad.) and six sweet orange [Citrus sinensis (L.) Osbeck] orchards from March to August 2006 when the pest is more abundant in southern Texas. Although flush shoot infestation levels did not vary with host plant species, densities of D. citri eggs, nymphs, and adults were significantly higher on sweet orange than on grapefruit. D. citri immatures also were found in significantly higher numbers in the southeastern quadrant of trees than other parts of the canopy. The spatial distribution of D. citri nymphs and adults was analyzed using Iowa's patchiness regression and Taylor's power law. Taylor's power law fitted the data better than Iowa's model. Based on both regression models, the field dispersion patterns of D. citri nymphs and adults were aggregated among flush shoots in individual trees as indicated by the regression slopes that were significantly >1. For the average density of each life stage obtained during our surveys, the minimum number of flush shoots per tree needed to estimate D. citri densities varied from eight for eggs to four flush shoots for adults. Projections indicated that a sampling plan consisting of 10 trees and eight flush shoots per tree would provide density estimates of the three developmental stages of D. citri acceptable enough for population studies and management decisions. A presence-absence sampling plan with a fixed precision level was developed and can be used to provide a quick estimation of D. citri populations in citrus orchards.

Estudio fisiológico de larvas de peces: retos y oportunidades

OpenAIRE

Burggren, Warren; Blank, Tara

2009-01-01

Los estudios de fisiología en larvas de peces, están mucho más atrasados que los de peces adultos, sin embargo ofrecen enormes oportunidades para ampliar nuestro conocimiento sobre la biología básica de peces marinos y de agua dulce. Éstos también pueden mejorar la investigación y gestión en ciertas áreas de la ciencia aplicada, como la acuicultura, pesquerías y estudios ambientales. además, las larvas de peces pueden ser eficaces como modelos animales para comprender la evolución, el desar...

Caractereisticas de la dieta de una muestra de adolescentes con sobrepeso y obesidad: estudio EVASYON

OpenAIRE

Suárez, N.; Wärnberg, Julia; Zapatera, Belén; Campoy, Cristina; Martí, Amelia; Garragori, J. M.; Marcos, Ascensión

2014-01-01

La prevalencia de sobrepeso y obesidad en niños y adolescentes ha aumentado en los últimos años en nuestro país, liderando la prevalencia europea de obesidad infantil. El propósito de este estudio es obtener información sobre la calidad de la dieta de una muestra de adolescentes con sobrepeso y obesidad antes de comenzar un estudio de intervención integral de nutrición, actividad física y psicología EVASYON es un estudio multicéntrico realizado en 5 hospitales españoles (Granada, Madrid, Pamp...

Implantes dentales en pacientes adultos postrauma dentoalveolar. Estudio descriptivo

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Edgardo González

2016-04-01

Conclusiones: En este estudio se presenta un protocolo establecido y se establece la necesidad de un diagnóstico detallado para planificar la rehabilitación mediante implantes dentales posterior a un trauma con un equipo multidisciplinario.

Sobre o condicionamento alimentar na cochonilha-branca, Planococcus citri (Risso (Hemiptera: pseudococcidae Regarding to host conditioning in citrus mealybug Planococcus citri (Risso (Hemiptera: pseudococcidae

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Lenira Viana Costa Santa-Cecília

2013-03-01

Full Text Available Estudos do comportamento alimentar mediante a técnica de "Electrical Penetration Graphs" (EPG das cochonilhas-farinhentas (Pseudococcidae provenientes de um hospedeiro de criação alternativo têm mostrado que esses insetos não atingem ou demoram cerca de 9 horas para alcançar a fase floemática. Por outro lado, aqueles provenientes do hospedeiro-fonte atingem a fase floemática mais rapidamente e apresentam maior frequência de alimentação nos vasos crivados. Esses resultados indicam a presença do fenômeno de condicionamento alimentar, ainda não demonstrado em cochonilhas. Assim, o presente trabalho teve como objetivo determinar a existência desse fenômeno em Planococcus citri (Risso (Hemiptera: Pseudococcidae. Foram realizados testes de livre escolha, monitoramento eletrônico (EPG e estudos de alguns parâmetros biológicos. Em todos os experimentos, o cafeeiro (Coffea arabica L., os citros (Citrus sinensis L. e abóbora (Cucurbita maxima L. foram utilizados como substratos de criação (fonte da cochonilha, sendo os tratamentos constituídos pela combinação entre os hospedeiros-fonte e os hospedeiros receptores (café e citros. O teste de escolha entre cafeeiro e citros nas primeiras 72 horas mostrou que as cochonilhas criadas em cafeeiro apresentaram preferência pelo cafeeiro; aquelas originadas dos citros mostraram uma tendência, embora não significativa, em selecionar os citros em relação ao cafeeiro e aquelas criadas em abóbora não mostraram preferência por nenhum dos hospedeiros. Os estudos do comportamento alimentar mediante o monitoramento eletrônico (EPG mostraram que a fase floemática, considerada como a fase de aceitação do hospedeiro, foi mais frequente em cafeeiro, seja com cochonilhas oriundas deste substrato, seja de citros. Aqueles insetos mantidos em abóbora e transferidos para o cafeeiro ou citros apresentaram excepcionalmente ou não apresentaram nenhuma fase floemática, respectivamente. A

The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae as a new menace to cotton in Egypt and its chemical control

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El-Zahi El-Zahi Saber

2016-04-01

Full Text Available The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae is a polyphagous sap sucking insect with a wide geographical and host range causing severe losses in economically important crops. This study represents the first record of P. solenopsis as a new insect attacking cotton plants (Gossypium barbadense var. Giza 86 in Kafr El-Sheikh governorate, Egypt. The insect was noticed on cotton plants for the first time during its growing season of 2014. The mealybug specimens were collected from infested cotton plants and identified as P. solenopsis. In an attempt to control this pest, eight toxic materials viz., imidacloprid, thiamethoxam, flonicamid, emamectin-benzoate, chlorpyrifos, methomyl, deltamethrin and mineral oil (KZ-oil, belonging to different chemical groups, were tested for their influence against P. solenopsis on cotton under field conditions. Methomyl, imidacloprid, thiamethoxam and chlorpyrifos showed the highest efficacy against P. solenopsis recording 92.3 to 80.4% reduction of the insect population. Flonicamid, emamectin-benzoate and KZ-oil failed to exhibit sufficient P. solenopsis control.

Characterization of a Newly Discovered Symbiont of the Whitefly Bemisia tabaci (Hemiptera: Aleyrodidae)

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Bing, Xiao-Li; Yang, Jiao; Zchori-Fein, Einat; Wang, Xiao-Wei

2013-01-01

Bemisia tabaci (Hemiptera: Aleyrodidae) is a species complex containing >28 cryptic species, some of which are important crop pests worldwide. Like many other sap-sucking insects, whiteflies harbor an obligatory symbiont, “Candidatus Portiera aleyrodidarum,” and a number of secondary symbionts. So far, six genera of secondary symbionts have been identified in B. tabaci. In this study, we report and describe the finding of an additional bacterium in the indigenous B. tabaci cryptic species China 1 (formerly known as B. tabaci biotype ZHJ3). Phylogenetic analysis based on the 16S rRNA and gltA genes showed that the bacterium belongs to the Alphaproteobacteria subdivision of the Proteobacteria and has a close relationship with human pathogens of the genus Orientia. Consequently, we temporarily named it Orientia-like organism (OLO). OLO was found in six of eight wild populations of B. tabaci China 1, with the infection rate ranging from 46.2% to 76.8%. Fluorescence in situ hybridization (FISH) of B. tabaci China 1 in nymphs and adults revealed that OLOs are confined to the bacteriome and co-occur with “Ca. Portiera aleyrodidarum.” The vertical transmission of OLO was demonstrated by detection of OLO at the anterior pole end of the oocytes through FISH. Quantitative PCR analysis of population dynamics suggested a complex interaction between “Ca. Portiera aleyrodidarum” and OLO. Based on these results, we propose “Candidatus Hemipteriphilus asiaticus” for the classification of this symbiont from B. tabaci. PMID:23144129

Evaluation of Vaccinium spp. for Illinoia pepperi (Hemiptera: Aphididae) performance and phenolic content.

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Ranger, Christopher M; Johnson-Cicalese, Jennifer; Polavarapu, Sridhar; Vorsa, Nicholi

2006-08-01

Host acceptance and population parameters of the aphid Illinoia pepperi (MacGillivray) (Hemiptera: Aphididae) were measured on highbush blueberry, Vaccinium corymbosum L. 'Elliott', and the wild species Vaccinium boreale Hall and Aalders, Vaccinium tenellum Aiton, Vaccinium pallidum Aiton, Vaccinium hirsutum Buckley, Vaccinium myrsinites Lamarck, and Vaccinium darrowi Camp. After 24 h of exposure, significantly fewer aphids remained in contact with V. boreale and V. hirsutum compared with V. corymbosum Elliott, V. darrowi, and V. pallidum. Length of the prereproductive period of I. pepperi was significantly longer on V. boreale and V. myrsinites, in contrast to V. corymbosum. Fecundity was also lower on V. boreale, V. hirsutum, V. myrsinites, and V. darrowi. Survivorship of I. pepperi 42 d after birth was significantly lower on V. hirsutum compared with the remaining Vaccinium spp. Reduced I. pepperi performance resulted in significantly lower intrinsic rate of increase (r(m)) values being associated with V. myrsinites, V. boreale, V. hirsutum, and V. darrowi, compared with V. corymbosum. Net reproductive rate (R(o)), generation time (T), and doubling time (T(d)) of I. pepperi also were affected by the Vaccinium spp. Total phenolic and flavonol content varied between Vaccinium spp., with some high phenolic content Vaccinium spp. having reduced aphid performance. However, no significant correlation between phenolics and I. pepperi performance was detected. Results from this study identified several potential sources of aphid resistance traits in wild Vaccinium spp.

Biology and life table parameters of Brevicoryne brassicae (Hemiptera: Aphididae) on cauliflower cultivars.

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Jahan, Fatemeh; Abbasipour, Habib; Askarianzadeh, Alireza; Hassanshahi, Golamhossein; Saeedizadeh, Ayatallah

2014-01-01

In this article, the biology and fertility life table parameters of the cabbage aphid, Brevicoryne brassicae (L.) (Hemiptera: Aphididae), were studied on cauliflower leaves, Brassica oleracea var. botrytis (Brassicales: Brassicaceae), of the cultivars Smilla, Snow mystique, White cloud, Buris, Galiblanka, Snow crown, SG, and Tokita. This study was conducted under controlled conditions: 25 ± 2°C, 65 ± 5% relative humidity (RH), and 16:8 (L:D) h photoperiods. Statistical analysis showed that there was a significant difference (P < 0.05) between the different growth stages and the mean number of laid nymphs. Further, the maximum and minimum growth periods were observed on Galiblanka and Buris cultivars, respectively. The shortest nymphal instar growth period was observed on the Smilla cultivar (6.70 d), and the longest lifespan was seen on the White cloud (8.10 d). The Smilla cultivar (39%), in an adult emergence stage, and the SG (88%) revealed the lowest and highest rates of survival, respectively. Aphids reared on the Smilla cultivar were found to have increased due to the high intrinsic (r(m)) and finite (λ) rate of increase and the low doubling time (DT). The results indicated that the application of cultivars affecting adult reproductive parameters could be a good solution to cabbage aphid control management. © The Author 2014. Published by Oxford University Press on behalf of the Entomological Society of America.

Morphometric comparisons of Diaphorina citri (Hemiptera: Liviidae populations from Iran, USA and Pakistan

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Mohammadreza Lashkari

2015-05-01

Full Text Available The Asian citrus psyllid (ACP, Diaphorina citri Kuwayama (Hemiptera: Liviidae, vector of citrus greening disease pathogen, Huanglongbing (HLB, is considered the most serious pest of citrus in the world. Prior molecular based studies have hypothesized a link between the D. citri in Iran and the USA (Florida. The purpose of this study was to collect morphometric data from D. citri populations from Iran (mtCOI haplotype-1, Florida (mtCOI haplotype-1, and Pakistan (mtCOI haplotype-6, to determine whether different mtCOI haplotypes have a relationship to a specific morphometric variation. 240 samples from 6 ACP populations (Iran—Jiroft, Chabahar; Florida—Ft. Pierce, Palm Beach Gardens, Port St. Lucie; and Pakistan—Punjab were collected for comparison. Measurements of 20 morphological characters were selected, measured and analysed using ANOVA and MANOVA. The results indicate differences among the 6 ACP populations (Wilks’ lambda = 0.0376, F = 7.29, P < 0.0001. The body length (BL, circumanal ring length (CL, antenna length (AL, forewing length (WL and Rs vein length of forewing (RL were the most important characters separating the populations. The cluster analysis showed that the Iran and Florida populations are distinct from each other but separate from the Pakistan population. Thus, three subgroups can be morphologically discriminated within D. citri species in this study, (1 Iran, (2 USA (Florida and (3 Pakistan population. Morphometric comparisons provided further resolution to the mtCOI haplotypes and distinguished the Florida and Iranian populations.

Processed kaolin affects the probing and settling behavior of Diaphorina citri (Hemiptera: Lividae).

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Miranda, Marcelo P; Zanardi, Odimar Z; Tomaseto, Arthur F; Volpe, Haroldo Xl; Garcia, Rafael B; Prado, Ernesto

2018-03-05

Alternative methods that have the potential to reduce the entry of Diaphorina citri Kuwayama (Hemiptera: Liviidae), the major citrus pest worldwide, into commercial groves could be a viable approach for huanglongbing management. Kaolin is an aluminum silicate that when sprayed on plants forms a white particle film that interferes with host recognition by the insects. Diaphorina citri orients towards the host plants by visual and olfactory cues. The purpose of the study was to determine the effect of processed kaolin on D. citri settling (no-choice) and probing behavior [electrical penetration graph (EPG) technique] under laboratory conditions, and to study its host plant finding ability and dispersal under field conditions in the absence and presence of young shoots. Under laboratory conditions, kaolin caused an overall reduction of 40% in the number of psyllids settled on treated seedlings; furthermore, the proportion of individuals that were able to reach the phloem was 50% lower on kaolin-treated plants than on untreated plants. In the field, the plant finding ability of D. citri was disrupted on kaolin-treated trees (overall reduction of 96%), regardless of the vegetative condition, and psyllid dispersal was slower in kaolin-treated plots than in the untreated control. This study clearly demonstrates that processed kaolin interferes negatively with different aspects of the host plant finding ability of D. citri. These findings suggest that processed kaolin has a high potential to reduce huanglongbing primary infection. © 2018 Society of Chemical Industry. © 2018 Society of Chemical Industry.

Esclavizada en los Estudios Poscoloniales

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Nellys Montenegro De la Hoz

2014-01-01

Full Text Available Este ensayo va a centrarse en el análisis de las formas de resis - tencia e identidad esclavizada presentes en Changó, el gran putas de Manuel Zapata Olivella, a través del análisis de los discur - sos hegemónicos y subalternos que hacían parte del sistema de poder, y la intervención de las teorías o estudios poscoloniales que cuestionan dichas perspectivas para redefinir las diferencias de las identidades contradictorias y desarrollar de esta manera literaturas deslindadas de las estructuras ideológicas y hegemónicas.

Ocorrência de Selenaspidus articulatus (Morgan (Hemiptera, Diaspididae e do predador Pentilia egena (Mulsant (Coleoptera, Coccinelidae em Myrtus communis L. (Myrtaceae, em Pinheiral, RJ Occurrence of Selenaspidus articulatus (Morgan (Hemiptera, Diaspididae and of the predator Pentilia egena (Mulsant (Coleoptera, Coccinelidae on Myrtus communis L. (Myrtaceae, in Pinheiral County, Rio de Janeiro, Brazil

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Edson Henrique de Azeredo

2004-12-01

Full Text Available As avaliações foram realizadas, semanalmente, durante os estádios vegetativo e de floração/frutificação em quatro quadrantes (N, S, L, O da planta. Foram coletadas 2.230 espécimes de S. articulatus, sendo 1.224 no estágio vegetativo e 1.006 no florescimento/frutificação, sendo 59,8% adultos. De um total de 965 P. egena, 416 foram imaturos e 549 adultos. As principais conclusões deste trabalho são: (1 M. communis pode ser indicada como planta isca; (2 esta planta pode ser cultivada ou não próxima às culturas de importância econômica, pois funciona como um repositório da praga ou de seu inimigo natural; (3 a relação predador/presa/quadrante da planta/estágio fenológico foi, respectivamente, 1,14:1,0 e 1,0:1,08 nos quadrantes norte e leste; enquanto, à sul e oeste da planta M. communis foi de 1,0:2,26 e 1,0:2,80; (4 a predação de S. articulatus por P. egena ocorreu, em média, de 1,0 a 2,8 ninfas e 1,66 a 4,44 adultos (no estágio vegetativo e de 1,0-3,76 a 1,0-3,98 (no estágio de florescimento/frutificação, com diferenças significativas em PThe evaluations were conducted weekly in the vegetative and blooming/fructification phases in four quadrants (N, S, E, W of the plant. It was collected 2,230 specimens of S. articulatus, 1,224 in the vegetative phase and 1,006 in the blooming/fructification, being 59,8% adults. From the total of 965 of P. egena, 416 were immatures and 549 adults. The main conclusions are: (1 M. communis may be indicated as plant bait; (2 this plant, may be cultivated or not around the crops of economic importance, because it may function as a reservoir of the pest or of its natural enemies; (3 the relation predator/prey/plant quadrant/phenology phases was, respectivelly, 1.14:1.0 and 1.0:1,08 in north and east quadrant; while in south and west quadrant was 1.0:2.26 and 1.0:2.80; and, (4 the predaction of S. articulatus by P. egena was, in average, 1.02.8 nymphs and 1.664.44 adults (in vegetative phases and 1.03.76 and 1.0-3.98 (in blooming/fructification, with significant differences at P< 0.01.

Estudio de los metabolitos secundarios exudados por las hojas de Aloe barbadensis

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López González, Germán

2016-01-01

Debido a las numerosas propiedades terapéuticas Aloe Barbadensis, como cicatrizantes, hidratantes digestivas o anti-inflamatorias; se plantea el estudio, aislamiento y determinación estructural de los componentes de su exudado. Este se obtiene al hacer un corte en la hoja, y contiene principalmente antraquinonas y glicósidos de antronas, algunos de ellos con actividad anti-cancerígena reportada. Se realizará también un estudio biodirigido del mismo y se utilizarán técnicas como la resonancia ...

Motricidad y cognición. Un estudio empírico

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Josep Morales Aznar

2006-12-01

Full Text Available Esta tesis es un intento de clarificar diversos aspectos sobre las dimensiones que abarca la Educación. La motricidad y la cognición son dos de estas dimensiones educativas sobre las cuales existe un amplio debate, tanto en su definición como en su posible interdependencia. Este trabajo no se centra en debates teóricos, sino que intenta aportar datos empíricos sobre dicha realidad. Dichos datos se aportan a partir de 3 estudios sobre población escolar, en cada uno de ellos la muestra se segmenta a partir del tipo de actividad física desarrollada: En el primer estudio se aplican un total de 6 pruebas a 487 sujetos de entre 9 y 16 años. Los ámbitos a los que pertenecen las pruebas son: perceptivo-motor, expresión gráfica y rendimiento académico. La segmentación de la muestra más interesante que se realiza en este estudio es la distinción entre los individuos que realizan actividades extraescolares y los que no. El segundo estudio se realiza también con población escolar, pero en este caso son 241 individuos que practican deporte de alto rendimiento. Las pruebas aplicadas son las mismas que en el estudio anterior pero añadiendo dos pruebas del ámbito técnico-táctico. El tercer estudio es un trabajo meramente estadístico, ya que la muestra corresponde a los dos anteriores, en el que se realiza una comparación sobre los datos más relevantes. Posteriormente, en el apartado de conclusiones y discusión, se ofrecen aportaciones que giran alrededor de los vínculos que se pueden establecer entre los di­ferentes ámbitos y la implicación que tiene el tipo de práctica física desarrollada en relación con las pruebas analizadas. En concreto, se confirma una evolución de los resultados de todas las pruebas en consonancia con el aumento de la edad de los sujetos. No queda definida la relación entre la operatividad en tareas que implican a la motricidad global y las que implican a la motricidad fina. El ámbito de la motricidad

Elementos para evaluar planes de estudio en la educación superior

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Leda María Roldán Santamaría

2005-01-01

Full Text Available Este artículo presenta los lineamientos para generar una propuesta de evaluación curricular de un plan de estudios en el ámbito de la educación universitaria. Identifica la importancia que tiene este proceso para la institución con el fin de analizar las debilidades y fortalezas, con miras a la toma de decisiones para su actualización. En la propuesta se responde el por qué y para qué se debe evaluar; los beneficios que los usuarios recibirán de esa actualización; la concreción de elementos del plan de estudios por evaluar; la definición de las variables que se aplicarán en la evaluación de los elementos externos e internos. Se proponen cuáles son los sectores sociales que deben involucrarse en dicha evaluación; se analiza el momento adecuado para realizar la evaluación y cada cuanto debe aplicarse, se establece un plan estratégico para aplicar la evaluación y se presentan las sugerencias de los usos que se le pueda dar a la información recopilada con la evaluación. Evaluar un plan de estudios permite descubrir las necesidades de cambio de los planes de estudio; el establecimiento de los lineamientos para su actualización y el tiempo en que se debe cumplir con la misma para que el plan no pierda vigencia

El “Estudio del Rechazo”: mujeres a las que no se les permite abortar = Turnaway Study

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Foster, Diana Greene; Barar, Rana; Weitz, Tracy; Heather, Gould; Weisz, Elissete

2013-01-01

El Turnaway Study o Estudio del Rechazo, es un estudio longitudinal prospectivo sobre mujeres a quienes se realiza un aborto y mujeres a quienes se les niega debido a que se presentan a recibir tratamiento después del límite de semanas de gestación establecido por la clínica. El estudio está encaminado a describir la salud mental y física y los resultados socioeconómicos de la realización de un aborto en comparación con llevar a término un embarazo indeseado.

La iconografía neogranadina y el estudio del miedo

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María del Rosario Leal del Castillo

2005-12-01

Full Text Available For some time, visual images have been taken momentousness as historical sources, giving the possibility to make studies in mentality history. This article shows how to use religious iconography as a historical source, intermingled with other written documents, and analyzed from different fields, directed to the study of fear across transplanted imaginaries.//Desde hace algún tiempo, las imágenes visuales han cobrado importancia como fuente histórica, brindando la posibilidad de realizar estudios imbuidos en la historia de las mentalidades. Este artículo describe cómo utilizar la iconografía religiosa como fuente histórica, entrelazada con otros documentos escritos y analizados desde diversas disciplinas, para el estudio de! miedo a través de imaginarios trasplantados.

Amino acid transporter expansions associated with the evolution of obligate endosymbiosis in sap-feeding insects (Hemiptera: sternorrhyncha).

Science.gov (United States)

Dahan, Romain A; Duncan, Rebecca P; Wilson, Alex C C; Dávalos, Liliana M

2015-03-25

Mutualistic obligate endosymbioses shape the evolution of endosymbiont genomes, but their impact on host genomes remains unclear. Insects of the sub-order Sternorrhyncha (Hemiptera) depend on bacterial endosymbionts for essential amino acids present at low abundances in their phloem-based diet. This obligate dependency has been proposed to explain why multiple amino acid transporter genes are maintained in the genomes of the insect hosts. We implemented phylogenetic comparative methods to test whether amino acid transporters have proliferated in sternorrhynchan genomes at rates grater than expected by chance. By applying a series of methods to reconcile gene and species trees, inferring the size of gene families in ancestral lineages, and simulating the null process of birth and death in multi-gene families, we uncovered a 10-fold increase in duplication rate in the AAAP family of amino acid transporters within Sternorrhyncha. This gene family expansion was unmatched in other closely related clades lacking endosymbionts that provide essential amino acids. Our findings support the influence of obligate endosymbioses on host genome evolution by both inferring significant expansions of gene families involved in symbiotic interactions, and discovering increases in the rate of duplication associated with multiple emergences of obligate symbiosis in Sternorrhyncha.

The effects of host, geographic origin, and gender on the thermal requirements of Diaphorina citri (Hemiptera: Psyllidae).

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Nava, Dori E; Gomez-Torres, Mariuxi L; Rodrigues, Marjorie D; Bento, José M S; Haddad, Marinéia L; Parra, José R P

2010-04-01

Diaphorina citri Kuwayama (Hemiptera: Psyllidae) is the vector of the bacteria that causes citrus greening and is considered one of the world's most important citrus diseases. We examined how host, geographic region, and gender affect the thermal requirements of D. citri. The insects were reared in climatic chambers at constant temperatures of 18, 20, 22, 25, 28, 30, and 32 +/- 1 degrees C, 70 +/- 10% RH, and a 14 h photophase. Host plants for D. citri included orange (Citrus sinensis [Rutaceae]) varieties Pêra and Natal, the rootstock, Rungpur lime (C. limonia [Rutaceae]) and the natural host, Orange jessamine (Murraya paniculata [Rutaceae]). To study the influence of geographic origin on thermal requirements, we studied D. citri populations from Piracicaba, SP (warmer region) and Itapetininga, SP (cooler region). The duration and survival of the development stages and the duration of the total development (egg-adult) did not differ significantly on the different hosts, but it did vary with temperature. Nymphs of D. citri created on the different hosts have the same thermal requirements. The thermal requirements for this species collected from the two climate regions were identical; males and females also had the same thermal requirements.

Estudio de caso: estrategias internacionales aplicadas a la empresa Astro Maquinaria Ltda.

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Araujo Peñate, Ana Maria; Piza Mora, Juan David; Velasco Zamora, Maria Ximena

2013-01-01

En el estudio de caso se podrá encontrar información relacionada a la empresa ASTRO MAQUINARIA Ltda. la cual lleva más de 20 años en el mercado, generando soluciones a las necesidades de maquinaria y equipos, especialmente en el área de bombeo. Desde el principio la empresa ha estado importando desde Estados Unidos el portafolio de productos que ofrecen, actualmente tienen la representación comercial de la empresa Pentair Pump Group. Este estudio de caso pretende identificar cual es la estrat...

An experimental test of rainfall as a control agent of Glycaspis brimblecombei Moore (Hemiptera, Psyllidae on seedlings of Eucalyptus camaldulensis Dehn (Myrtaceae

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Karla N. Oliveira

2012-03-01

Full Text Available An experimental test of rainfall as a control agent of Glycaspis brimblecombei Moore (Hemiptera, Psyllidae on seedlings of Eucalyptus camaldulensis Dehn (Myrtaceae. Glycaspis brimblecombei is one the greatest threats to eucalyptus plantations in Brazil. The effects of rainfall to reduce the abundance of lerp of Glycaspis brimblecombei on experimentally infested seedlings of Eucalyptus camaldulensis were assessed. The number of lerps on the adaxial and abaxial surfaces of every leaf of 60 seedlings was recorded, before and after submission to the following treatments: "artificial rain", "leaf wetting" and control. A drastic reduction in lerp abundance per plant was observed after the treatments "leaf wetting" and artificial rain (F = 53.630; p Teste experimental da chuva como agente de controle de Glycaspis brimblecombei Moore (Hemiptera, Psyllidae em mudas de Eucalyptus camaldulensis Dehn (Myrtaceae. Glycaspis brimblecombei é uma das maiores ameaças das plantações de eucalipto do Brasil. Foram avaliados os efeitos da água na redução da abundância de conchas desse inseto em mudas de Eucalyptus camaldulensis infestadas experimentalmente. Foi quantificado o número de conchas nas superfícies adaxial e abaxial de todas as folhas de 60 mudas, antes e após a aplicação dos seguintes tratamentos: "chuva artificial", "molhamento das folhas" e controle. Foi observada uma drástica redução na abundância de conchas nos tratamentos "chuva artificial" e "molhamento das folhas" (F = 53,630; p < 0,001, o que não ocorreu para o tratamento controle ao longo do experimento (F = 1,450; p = 0,232. Ao final do experimento, a abundância de conchas foi significativamente menor no tratamento "chuva artificial" e "molhamento das folhas" do que no tratamento controle. Dessa forma, dois dias de chuva mostraram ser eficientes para diminuir mais que 50% da população de conchas, com quase 100% de eficiência após 5 dias de experimento. Nossos resultados

ESTUDIO DEL EFECTO DE LA CRANEOACUPUNTURA EN PACIENTES CON ENFERMEDAD VASCULAR CEREBRAL. (EVC)

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PEREZ BRAVO, MIGUEL

2009-01-01

LA ENFERMEDAD VASCULAR CEREBRAL (EVC) EN MEXICO ES UN IMPORTANTE PROBLEMA DE SALUD PUBLICA, ES LA TERCERA CAUSA DE MUERTE Y LA SEGUNDA EN PRODUCIR INCAPACIDAD NEUROLOGICA. EL OBJETIVO DE ESTE ESTUDIO FUE EVALUAR EL EFECTO DE LA CRANEOACUPUNTURA EN PACIENTES CON ENFERMEDAD VASCULAR CEREBRAL (ZHONG FENG). EL PRESENTE ES UN ESTUDIO EXPERIMENTAL, PROSPECTIVO Y LONGITUDINAL, REALIZADO EN EL HOSPITAL DEL ISSSTE DE LA CIUDAD DE PUEBLA, A UN GRUPO DE 11 PACIENTES DE AMBOS SEXOS, CON...

La evaluación procesual del currículo y su efecto en el plan de estudios de una carrera de pregrado de la PUCP. Estudio de caso.

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Manrique Villavicencio, Lileya

2009-01-01

Existe una renovada preocupación por la calidad de la formación en las instituciones de educación superior. Ello exige implantar procesos de evaluación continua. La investigación tuvo como problema: ¿Cómo se desarrolla la evaluación procesual de currículo y la toma de decisiones que conducen a modificaciones en el plan de estudios en una carrera de pregrado de la PUCP, considerando la caracterización de los cambios en el Plan de estudios de las diversas carreras de la PUCP?. Se buscó comprend...

Estudio del álbum sin palabras

OpenAIRE

Bosch Andreu, Emma

2015-01-01

[spa] Estudio del Álbum Sin Palabras tiene como objetivo principal definir, analizar y categorizar los álbumes sin palabras destinados principalmente al público infantil y juvenil dando a conocer sus características, peculiariades y diversidad tipológica, para facilitar las tareas de análisis y de mediación de investigadores, educadores, bibliotecarios y cualquier persona interesada en los libros con imágenes. En el capítulo titulado «Un nuevo mapa para los Libros Sin Palabras» situamos e...

EL ENFOQUE MIXTO DE INVESTIGACIÓN EN LOS ESTUDIOS FISCALES

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Manuel Ildefonso Ruiz Medina

2013-08-01

Full Text Available La finalidad del presente documento, es orientar a los investigadores de estudios fiscales basado en la experiencia personal de quienes escriben, a encontrar los mecanismos aptos para elaborar sus tesis doctorales mediante un enfoque mixto, es decir, mediante la combinación de los enfoques cuantitativo y cualitativo; en primera instancia, en nuestro trabajo de investigación se aplicó el enfoque cuantitativo para determinar resultados numéricos utilizando la técnica de la encuesta, cualitativamente se recurrió a la tradición de estudio de caso y a entrevistas abiertas a los sujetos de la investigación, lo que permitió confirmar el marco teórico y alcanzar los objetivos planteados, la intención era explicar, describir y explorar información de un programa específico de una política pública. En los estudios fiscales dependiendo del enfoque que se haya seleccionado una vez elaborados los objetivos, el investigador debe tener muy en cuenta que los resultados que obtenga deben ser claramente analizados y que deben reflejar confiabilidad y validez; probablemente al escoger el enfoque cualitativo se alcancen los objetivos propuestos, pero si no se tiene la certeza o la confianza suficiente, es recomendable ir más allá y utilizar el enfoque cuantitativo para ofrecer claridad y confianza a los resultados.

Redes de colaboración científica en los estudios territoriales

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Yuritzi Becerril-Tinoco

2015-01-01

Full Text Available Se presenta una investigación sobre la colaboración científica en el área de los estudios territoriales. Se retoma el enfoque de la teoría de redes sociales y de sistemas complejos, ampliamente desarrollado por Loet Leydesdorff. A través de un análisis estadístico basado en fuentes como Redalyc, Scopus, Web of Science y Scielo, se muestran las pautas de colaboración en el campo de estudios territoriales y se señala que existe relación entre el incremento de la literatura de este campo y la publicación en colaboración. Finalmente se presentan los indicadores generales de producción científica de una revista de esta área temática, Economía, Sociedad y Territorio, y se contrastan los resultados con la tendencia general en América Latina. La investigación muestra que los estudios urbano-regionales constituyen un campo altamente colaborativo.

Tip of the clade on the top of the World—the first fossil Lophopidae (Hemiptera: Fulgoromorpha) from the Palaeocene of Tibet

Science.gov (United States)

Szwedo, Jacek; Stroiński, Adam; Lin, Qibin

2015-06-01

Lophopidae is a family of planthoppers (Hemiptera: Fulgoromorpha) present today in tropical and subtropical zones of the Old World. The most recent taxonomic studies and phylogeny of these insects do not include the extinct representatives. Therefore, each new discovery of a fossil lophopid is of high interest, giving new insights to their evolutionary history and enabling to test the proposed relationships. The recent findings of extinct Lophopidae in Europe, in various Palaeogene deposits, put in doubts their proposed evolutionary and biogeographic scenario. The new fossil from the Palaeocene of Northern Tibet is related to one of the Lophopidae clades, Apia+ group, believed to be the most advanced one, and recently distributed in the recent Sundaland-New Guinea-Queensland area. A new genus and species Gesaris gnapo gen. et sp. n. provide information on early lophopids diversity and relationships and demonstrates the necessity for a revision of the existing hypotheses for the initial diversification and distributional pattern of the Lophopidae.

NCG61/33: Plan de Estudios de M??ster en Educaci??n Musical, una Perspectiva Multidisciplinar

OpenAIRE

Universidad de Granada

2012-01-01

Plan de Estudios de M??ster en Educaci??n Musical, una Perspectiva Multidisciplinar. Resoluci??n de 5 de marzo de 2012, de la Universidad de Granada, por la que se publica el plan de estudios de M??ster en Educaci??n Musical, una Perspectiva Multidisciplinar

Elongation Factor-1α Accurately Reconstructs Relationships Amongst Psyllid Families (Hemiptera: Psylloidea), with Possible Diagnostic Implications.

Science.gov (United States)

Martoni, Francesco; Bulman, Simon R; Pitman, Andrew; Armstrong, Karen F

2017-12-05

The superfamily Psylloidea (Hemiptera: Sternorrhyncha) lacks a robust multigene phylogeny. This impedes our understanding of the evolution of this group of insects and, consequently, an accurate identification of individuals, of their plant host associations, and their roles as vectors of economically important plant pathogens. The conserved nuclear gene elongation factor-1 alpha (EF-1α) has been valuable as a higher-level phylogenetic marker in insects and it has also been widely used to investigate the evolution of intron/exon structure. To explore evolutionary relationships among Psylloidea, polymerase chain reaction amplification and nucleotide sequencing of a 250-bp EF-1α gene fragment was applied to psyllids belonging to five different families. Introns were detected in three individuals belonging to two families. The nine genera belonging to the family Aphalaridae all lacked introns, highlighting the possibility of using intron presence/absence as a diagnostic tool at a family level. When paired with cytochrome oxidase I gene sequences, the 250 bp EF-1α sequence appeared to be a very promising higher-level phylogenetic marker for psyllids. © The Author(s) 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Estudio comparativo de los Lenguajes de Programación Algebráicos SQL 2005 y Oracle

OpenAIRE

García Díaz, Bertila Liduvina

2013-01-01

Estudio comparativo de los lenguajes de programación algebraicos SQL 2005 y ORACLE. El objetivo de esta investigación es realizar un estudio comparativo a nivel práctico de ambos Lenguajes algebraicos y profundizar en un tema que corresponde al curso de Base de Datos a mi cargo. Para recopilar los datos de este estudio se creé una Base de Datos en cada uno de los Lenguajes y se comprobó a nivel del Lenguaje de definición de datos (DDL), Lenguaje de manipulación de datos (DML) y Leng...

La actuación y los Estudios Literarios

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Karina Mauro

2011-05-01

de los estudios literarios en la investigación sobre la Actuación a partir del análisis de los conceptos de representación y mimesis aristotélica y de los problemas que acarrea la aplicación de estos conceptos en el análisis de la acción del actor en escena.

Estudio sobre encofrados de madera modernos

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de la Peña Aznar, Juan M.

1980-11-01

Full Text Available The author continues the development of the subject «Modern Timber Formwork», by summing up the comparative examination —already carried out in Part III of this Study— of the different types of glued timber existing on the market. In addition, the loads and stresses allowable for coniferous timber and the proposal for establishing Regulations for the Timber Section of the Research and Experimental Forestry Institute of Spain are given. In part V of the author's Study, published in this article, the important subject of the glues used for joining timber, a truly vital point in order to obtain louvered timber beams which are simply glued together, is approached.

El autor continúa el desarrollo del tema sobre «Encofrados de madera modernos», resumiendo el estudio comparativo —ya hecho en la Parte III de este Estudio— de las diferentes vigas de madera encolada existentes en el mercado dando, además, las cargas y tensiones admisibles para maderas coníferas y la propuesta de Reglamentación de la Sección de Maderas del Instituto Forestal de Investigaciones y Experiencias de España. En la parte V del Estudio del autor, publicada en este articulo, se aborda el importante tema de las colas empleadas para las uniones de madera, algo realmente vital para la obtención de vigas de madera en celosía simplemente encoladas.

Estudio sobre encofrados de madera modernos

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de la Peña Aznar, Juan M.

1980-12-01

Full Text Available The author continues the development of the subject «Modern Timber Formwork», by summing up the comparative examination —already carried out in Part III of this Study— of the different types of glued timber existing on the market. In addition, the loads and stresses allovk/able for coniferous timber and the proposal for establishing Regulations for the Timber Section of the Research and Experimental Forestry Institute of Spain are given. In part V of the author's Study, published in this article, the important subject of the glues used for joining timber, a truly vital point in order to obtain louvered timber beams which are simply glued together, is approached.

El autor continúa el desarrollo del tema sobre «Encofrados de madera modernos», resumiendo el estudio comparativo —ya hecho en la Parte III de este Estudio— de las diferentes vigas de madera encolada existentes en el mercado dando, además, las cargas y tensiones admisibles para maderas coníferas y la propuesta de Reglamentación de la Sección de Maderas del Instituto Forestal de Investigaciones y Experiencias de España. En la parte V del Estudio del autor, publicada en este artículo, se aborda el importante tema de las colas empleadas para las uniones de madera, algo realmente vital para la obtención de vigas de madera en celosía simplemente encoladas.

Un estudio exploratorio del perfil de las mujeres empresarias en el Perú

OpenAIRE

Avolio Alecchi, Beatrice

2008-01-01

La investigación identifica el perfil de las mujeres empresarias en el Perú mediante la exploración cualitativa de sus características demográficas; sus antecedentes educativos, laborales y familiares; sus habilidades administrativas; la naturaleza de sus empresas; los factores que las han estimulado a convertirse en empresarias; y los obstáculos para el desarrollo de sus empresas. El estudio utiliza el paradigma cualitativo basado en estudios de caso de veinticuatro mujeres empresarias en el...

Cold Tolerance of Megacopta cribraria (Hemiptera: Plataspidae): An Invasive Pest of Soybeans.

Science.gov (United States)

Grant, Jessica I; Lamp, William O

2017-12-08

Kudzu bug, Megacopta cribraria Fabricius (Hemiptera: Plataspidae), first discovered in the United States in 2009, is an invasive pest of soybeans. From 2013 to 2016, Maryland has been the northern limit of its distribution in the United States. We sought to determine the physiological cold temperature limits, timing of movement to overwintering locations, and to characterize overwintering microhabitat temperature. We measured supercooling point (SCP) on three populations from distinct USDA plant hardiness zones in Maryland and Virginia between October and December of 2015. The average SCP across all sample months and populations was -12.6°C and no consistent trend of month or population location were observed. Additionally, we assessed the lower lethal temperature to kill 50% of the population (LLT50) at the same population locations in October and November 2015. The average LLT50 over both months and all three population locations was -5.1°C. Again, no consistent trend based on population location was observed but we did find a modest depression in the LLT50 values between October and November. We observed that kudzu bug overwinters in leaf litter and begins to move into the litter in late November to early December. Leaf litter moderates day to night temperature differences and was warmer than ambient temperature by an average of 0.7°C. Evidence suggests that the cold tolerance of the kudzu bug limits its distribution north of Maryland. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Caracterización in silico de las proteínas del choque térmico Hsp70 y Hsp90 deBemisia tabaci (Hemiptera: Aleyrodidae y su posible actividad adaptativa

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Eneida Torres Cabra

2014-06-01

Full Text Available La mosca blanca, Bemisia tabaci (Hemiptera: Aleyrodidae es una de las plagas más destructivas e invasivas en el mundo, ataca una gran cantidad de cultivos. Se adapta fácilmente a plantas hospederas y a nuevas regiones geográficas, lo que sugiere el desarrollo de mecanismos de control a daños producidos por factores estresantes. Las proteínas Hsp se expresanen los organismos como mecanismo de defensa, actúan como chaperonas en el correcto ensamblaje de las proteínas. En este estudio se realizó una caracterizaciónin silico de las proteínas Hsp70 y Hsp90 de B. tabaci, secuencias obtenidas de NCBI. La determinaciónde los perfiles de hidrofobicidad, polaridad, accesibilidady flexibilidad se obtuvieron con “ProScale” de ExPASy, el perfil de antigenicidad con JaMBW. La secuencia aminoacídica se analizó con GOR IV y SOPMA y la composición de aminoácidos con ProtParam. Para analizar el peso molecular, índice deinestabilidad, índice alifático y gradiente hidropático,con GRAVY. La estructura terciaria se obtuvo con HHpred, y ESyPred3D. Para validar las estructuras 3D se utilizó Procheck, What_check y errat. Hsp70 y Hsp90 de B. tabaci presentan valores bajos de hidrofobicidady altos de polaridad, flexibilidad y accesibilidad, características que le permiten a las proteínas extender su capacidad como chaperonas. La Hsp70tiene una estructura secundaria compuesta por 41-45% alfa hélices, 30-43% coil y menos del 6% en hoja plegada y la Hsp90 por 52 y 53% hélices, 26-34% coily 6% hoja plegada. Las Hsp juegan un rol importante en los insectos debido a su tamaño y corto ciclo de vida, pues la temperatura influye en su distribución y abundancia.

Estudio sobre redes sociales y estudiantes

OpenAIRE

Toledo Morales, Purificación; Sánchez García, José Manuel

2012-01-01

En este estudio pretendemos analizar cómo una muestra de 150 estudiantes utiliza las redes sociales, y explorar el impacto de estas en el rendimiento académico de los mismos. Los datos recogidos de la aplicación y análisis de una escala de opinión revelaron que mas de la mitad de los estudiantes encuestados utilizan internet con una finalidad puramente recreativa, y las redes sociales para estar en contacto con los amigos. La mayoría de los encuestados rechazan las solicitudes de amistad de d...

Amplificadores con transistores. Estudio y dimensionado

OpenAIRE

Lubiano García, Adrián

2017-01-01

Este trabajo es un estudio de las distintas configuraciones de los amplificadores con transistores vistos en la asignatura de Electrónica Analógica del tercer curso del Grado en Ingeniería en Electrónica Industrial y Automática de la Escuela de Ingenierías Industriales de la Universidad de Valladolid. En este trabajo se mostrarán los pasos seguidos en la creación de una aplicación con Visual Basic para la realización de los ejercicios de las distintas configuraciones, así...

Anorexia nervosa: un estudio de casos

OpenAIRE

Zusman, Lillyana

2013-01-01

La Anorexia Nervosa es un trastorno de alimentación que se define (etimológicamente) como una "pérdida nerviosa del apetito". Se caracteriza por la actitud consciente, voluntaria y rotunda de los sujetos  de tener un exceso de peso que intentan modificar por vía de la inanición. A partir del estudio de casos, se propone la distinción entre una Anorexia Nervosa Estructural -aquella en la que predomina el conflicto intrapsíquico primario y arcaico, y que manifiesta una conducta aislada y retraí...

Preocupaciones y supuestos en los estudios de recepción teatral

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Lic. Miguel Ángel Santagada

1999-01-01

Full Text Available Luego de una presentación de las principales inquietudes de los estudios de recepción teatral, se describen algunos conceptos generales que han inspirado esta línea de estudios empíricos. Se discuten las tradiciones teóricas conocidas como la teoría de los efectos indiferenciados, la teorías de los usos y gratificaciones y la teoría de la lectura literaria, a fin de precisar los términos de acuerdo con los cuales hemos desarrollado nuestras investigaciones de campo. Finalmente, se ejemplifica esta corriente mediante un ejemplo tomado a partir de una tarea de campo referida a una obra teatral de la dramaturga argentina Griselda Gambaro.

Entre negación y reconocimiento. Estudios sobre “homosexualidad” en Colombia

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José Fernando Serrano A.

1997-04-01

Full Text Available A Ebel Botero, pionero de los estudios sobre homosexualidad en Colombia¿Qué se ha escrito en Colombia sobre la “homosexualidad”? ¿Existen estudios desde las ciencias sociales y humanas sobre las personas “homosexuales” en el país? Con este par de preguntas el autor presenta un recorrido inicial por algunos textos de autores colombianos al respecto y señala la necesidad de abordar la construcción de conocimiento especializado que ahonde en la comprensión de las diversas formas en que se expresan las sexualidades.

Cryptic Species Identification and Composition of Bemisia tabaci (Hemiptera: Aleyrodidae) Complex in Henan Province, China

Science.gov (United States)

Hu, Jian; Wang, Lun-Ji; Dong, Jun-Feng; Song, Yue-Qin; Sun, Hui-Zhong

2017-01-01

Abstract Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex, causing significant crop losses in China during the last decade. Although knowledge of cryptic species composition and dynamics within B. tabaci complex is critical for developing sustainable pest management strategies, limited information is available on this pest in the Henan province of China. A systematic survey of the cryptic species composition and distribution of B. tabaci complex in different locations of Henan province was conducted in 2012. The results of RAPD-PCR and the gene for the mitochondrial cytochrome oxidase subunit-1 (mtCOI) based phylogenetic relationships established using Bayesian method indicated there were four known cryptic species MEAM1, MED, Asia II 3, Asia II 9 and a new cryptic species named China 6 in Henan province. In the survey, the invasive cryptic species MED and MEAM1 were found to be predominant with wide spread distribution across the surveyed regions. On the contrary, the indigenous B. tabaci cryptic species including Asia II 3, Asia II 9 and China 6 remained with low prevalence in some surveyed regions. Cryptic species MEAM1 and MED have not completely displaced the native B. tabaci in Henan province. This current study for the first time unifies our knowledge of the diversity and distribution of B. tabaci across Henan province of China. PMID:28973577

Estudio del impacto ambiental de medicamentos de control especial en Bogotá, Colombia. Caso de estudio: Lorazepam

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Ibeth Eileen López

2016-01-01

Full Text Available El aumento de la población y la cobertura de los sistemas de salud, así como el crecimiento del mercado farmacéutico, ha dado lugar a la presencia de una nueva generación de residuos peligrosos, que no habían sido considerados como tal. En Colombia, no se han realizado suficientes estudios relacionados con el impacto ambiental ocasionado por la disposición final de medicamentos, porque no existen cifras disponibles acerca de la cantidad depositada diariamente en rellenos sanitarios, destruida en plantas gestoras de residuos peligrosos o encontrada en plantas de tratamiento de aguas residuales. Se encontró en esta investigación que sólo en Bogotá, se destruyen en promedio anualmente 9.310.123 unidades farmacéuticas de productos de control especial, sin considerar las unidades desechadas a nivel doméstico. Para estudiar el impacto ambiental, se seleccionó el principio activo lorazepam, la información sobre la cantidad del medicamento consumida y destruida en plantas gestoras de residuos peligrosos en la ciudad de Bogotá, durante los años 2012 y 2013, fue aportada por el Fondo Nacional de Estupefacientes. Los datos fueron evaluados utilizando la matriz de Leopold, software especializado y ensayos de laboratorio complementarios. Este estudio pretende sensibilizar a fabricantes, prescriptores y pacientes sobre la responsabilidad ambiental en el uso de medicamentos de control especial.

Viviendo en Flatland. El estudio comparado del crimen violento

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Luis David Ramírez de Garay

2013-05-01

Full Text Available Esta nota de investigación indaga sobre el notorio rezago que la criminología y la sociología del crimen tienen en la aplicación de la metodología comparada. A diferencia de la ciencia política y algunas áreas de la investigación sociológica, la metodología comparada no ocupa un lugar preponderante en la investigación empírica del crimen. Sin embargo, existen algunos valiosos ejemplos sobre las ventajas del estudio comparado del crimen y del crimen violento. Por ello, incluyo una breve revisión del estado actual de dichos estudios y de sus inherentes limitaciones teóricas y metodológicas. Finalmente, concluyo la nota presentando mi propuesta para incorporar la metodología comparada en la agenda de investigación sobre las bases sociales del crimen y del crimen violento

Does feeding by Halyomorpha halys (Hemiptera: Pentatomidae) reduce soybean seed quality and yield?

Science.gov (United States)

Owens, D R; Herbert, D A; Dively, G P; Reisig, D D; Kuhar, T P

2013-06-01

The nonnative brown marmorated stink bug, Halyomorpha halys Stål (Hemiptera: Pentatomidae), has become an abundant pest of mid-Atlantic soybean since its introduction in the mid-1990s. Currently, there is little information indicating how this new pest should be managed in soybean or if economic thresholds developed for native stink bugs should be adjusted. In 2010 and 2011, field cage studies were conducted in Beltsville, MD, and Suffolk, VA, to evaluate H. halys injury to three different soybean reproductive development stages. Cages were infested for 2 wk using densities of zero, one, two, four, or eight stink bugs (fifth instars and adults) per 0.3 row-m. Cage plots were harvested, and subsamples were taken to determine pod losses and seed quality. Feeding injury to soybean caused by H. halys was similar to that of native stink bugs, as evidenced by seed destruction, punctures, and destroyed pods. Densities of four stink bugs per 0.3 row-m resulted in significant seed damage in three of four experiments. The full flowering (R2) soybean development stage was least affected by H. halys feeding. The full pod (R4) and the full seed (R6) stage were similarly sensitive to injury. There was no significant yield loss was associated with stink bug densities at either location, although there were significant differences among stages in two of four experiments. The data do not indicate that threshold densities for H. halys should be different than for the native stink bugs.

Reproduction, longevity and life table parameters of Monosteira unicostata (Hemiptera: Tingidae) at constant temperatures

Energy Technology Data Exchange (ETDEWEB)

Sánchez-Ramos, I.; Pascual, S.; Fernández, C.E.; González-Núñez, M.

2017-07-01

Information on the effect of temperature on biological parameters of phytophagous insects is one of the tools in IPM programs, as it allows prediction of risk situations in the field. This work reports the effect of temperature on reproductive parameters and longevity of one of the most important current pests of almond orchards in the Mediterranean basin, the poplar lace bug, Monosteira unicostata (Mulsant & Rey) (Hemiptera: Tingidae). The temperatures tested were 22, 25, 28, 31, 34 and 37ºC, always at 60 ± 10% relative humidity and under a L16:D8 photoperiod. Extreme temperatures had an adverse effect on preoviposition period, total fecundity and daily fecundity while increasing values of oviposition period and adults longevity were registered for decreasing temperatures. Male longevity was higher than female longevity, and mortality pattern differed between sexes for all temperatures but 37ºC. The nonlinear Lactin model described accurately the effect of temperature on the intrinsic rate of natural increase of M. unicostata populations and predicted the optimum temperature for population increase at 34.1ºC, at which the population doubling time is 3.6 days. Produced values of lower and upper thresholds for M. unicostata populations were 14.8 and 38.8ºC, respectively. This characterizes the poplar lace bug as a very important pest in the Mediterranean basin, with an increasing potential risk in a global warming scenario.

Effects of temperature and food on the development of Dysdercus maurus Distant (Hemiptera, Pyrrhocoridae)

International Nuclear Information System (INIS)

Almeida, Fabio Souto; Goncalves, Lenicio

2007-01-01

Dysdercus maurus Distant, 1901 (Hemiptera, Pyrrhocoridae) is an important pest on Gossypium spp. (cotton tree), Citrus sinensis Osbeck (Rutaceae) and Citrus reticulata Blanco (Rutaceae) crops. This insect also feeds on seeds of Chorisia speciosa St. Hil. (Bombacaceae). This work aimed to evaluate the effects of temperature and food on the development of D. maurus. Eight treatments were carried out, in six of them bugs were fed with seeds of C. speciosa and kept at 15, 18, 20, 25 and 30 ± 1 deg C, 80 ± 3% RH and 12h photo phase or in laboratory conditions (23.5 ± 2.6 deg C, 73.3 ± 9.9 % RH), and in the other two treatments bugs were fed with seeds of cotton variety IAC-22 and kept at 25 or 30 deg C. In all treatments five immature stages were observed. The increase of temperature caused reduction in the developmental time. The temperature of 15 deg C disabled nymphal eclosion and was also lethal to those nymphs ecloded at other temperatures. The lower mortality of nymphs occurred in the temperature of 25 deg C with cotton as food (24.07%). The lower threshold temperature (Tb) occurred for the first instar (11.54 deg C) and the higher for the second instar (15.33 deg C). The females of D. maurus required more degree-days (329.93 degree-days) than males (300.49 degree-days) until adult emergence. (author)

La institucionalización de los estudios culturales en Estados Unidos: el caso del doctorado en estudios culturales en la Universidad de Ccalifornia, Davis, a ocho años

OpenAIRE

Robert McKee Irwin

2007-01-01

Este artículo describe el proceso de institucionalización del campo de estudios culturales en los Estados Unidos. El ejemplo de este proceso en la experiencia de la Universidad de California, Davis, donde se estableció hace ocho años un doctorado en estudios culturales, aunque idiosincrático, ilustra el tipo de problemas, tanto prácticos como intelectuales, que tal institucionalización ha provocado en este país. Eel artículo señala también dos áreas el contenido cultural y la gestión cultural...

Población con discapacidad: Posibilidades y Desafíos para su Estudio

OpenAIRE

Scheuermann, Helga

2013-01-01

El presente artículo enfatiza en examinar las fuentes de datos existentes en la República Argentina y en una de sus provincias (Tucumán) sobre la población con discapacidad, con el fin de abordar estudios sobre las condiciones de vida de estas poblaciones. Se realiza un recorrido por los censos, encuesta nacional de discapacidad y fuentes provinciales de información, con el objetivo de establecer y evaluar las posibilidades de estudios comparativos, evolutivos y/o específicos que puedan co...

ESTUDIO EXPLORATORIO SOBRE APRENDIZAJE NO FORMAL E INFORMAL DE ESTUDIANTES Y EGRESADOS UNIVERSITARIOS

OpenAIRE

Carrasco, Rosario; Jadue, Fabiola; Letelier, Mario; Oliva, Claudia

2012-01-01

Existe consenso en que el aprendizaje no formal e informal debe ser reconocido por su impacto en los conocimientos y habilidades adquiridas. Este estudio pretende aportar al conocimiento del aprendizaje no formal e informal universitario, para ello se utilizó una metodología mixta, se analizaron factores que lo impulsan, y su uso y contribución al logro de resultados de aprendizaje en una universidad de nuestro país. A partir de los hallazgos del estudio, se elaboran una serie de sugerencias ...

Halophilanema prolata n. gen., n. sp. (Nematoda: Allantonematidae, a parasite of the intertidal bug, Saldula laticollis (Reuter(Hemiptera: Saldidae on the Oregon coast

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Poinar George O

2012-02-01

Full Text Available Abstract Background It is rare to find terrestrial nematode lineages parasitizing arthropods inhabiting the intertidal or littoral zone of the oceans. During an ecological study along the Oregon dunes, an allantonematid nematode (Tylenchomorpha: Allantonematidae was discovered parasitizing the intertidal shore bug, Saldula laticollis (Reuter(Hemiptera: Saldidae. This shore bug is adapted to an intertidal environment and can survive short periods of submergence during high tides. The present study describes the nematode parasite and discusses aspects of its development, ecology and evolution. Methods Adults and last instar nymphs of S. laticollis (Hemiptera: Saldidae were collected from the high intertidal zone among clumps of Juncus L. (Juncaceae plants at Waldport, Oregon on October 3, 2011. The bugs were dissected in 1% saline solution and the nematodes killed in 1% Ringers solution and immediately fixed in 5% formalin (at 20°C. Third stage juveniles removed from infected hosts were maintained in 1% saline solution until they matured to the adult stage, molted and mated. Results Halophilanema prolata n. gen., n. sp. (Nematoda: Allantonematidae is described from last instar nymphs and adults of the intertidal bug, Saldula laticollis on the Oregon coast. The new genus can be distinguished from other genera in the Allantonematidae by a stylet lacking basal knobs in both sexes, an excretory pore located behind the nerve ring, ribbed spicules, a gubernaculum, the absence of a bursa and the elongate-tubular shape of the ovoviviparous parasitic females. Studies of the organogenesis of Halophilanema showed development to third stage juveniles in the uterus of parasitic females. Maturation to the free-living adults and mating occurred in the environment. The incidence of infection of S. laticollis ranged from 0% to 85% depending on the microhabitat in the intertidal zone. Conclusions Based on the habitat and morphological characters, it is proposed

El estudio del periodismo taurino: revisión y actualización bibliográfica

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Mª Verónica de Haro de San Mateo

2011-11-01

Full Text Available Este artículo pone de relieve aquellos trabajos que han focalizado su atención en el estudio del periodismo taurino con el objetivo de ofrecer un estado de la cuestión de las investigaciones existentes en la materia. El resultado de nuestro estudio, que ha consistido fundamentalmente en la revisión bibliográfica, nos ha permitido de un lado, ofrecer un catálogo de títulos útil para futuros investigadores y de otro, señalar posibles vías de estudio, una vez constatada la ausencia de literatura sobre algunos aspectos relevantes que, sin duda, contribuirían a ampliar, contextualizar y en algunos casos también profundizar, las investigaciones actuales.

Masculinities studies in eastern Cuba: imaginaries significations. Estudios de masculinidades en la región oriental de Cuba: develando imaginarios. Estudios de masculinidades en la región oriental de Cuba: develando imaginarios.

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Denise Regina Quaresma da Silva

2013-07-01

Full Text Available In this paper we approached a study about masculinities imaginaries significations in eastern Cuba. Firstly, we rescued relevant moments of the masculinities studies in the country and some theoretical contributions to understand the social production of the masculinities. Besides, we show the qualitative results from the groups with men.En este artículo abordamos un estudio sobre significaciones imaginarias en torno a las masculinidades en la región oriental de Cuba. Primeramente, rescatamos momentos relevantes del desarrollo de los estudios de masculinidades en el país y algunas contribuciones teóricos que consideramos necesarias para comprender la producción de las masculinidades. Presentamos, además, los resultados cualitativos que emergieron de grupos de discusión realizados con hombres.En este artículo abordamos un estudio sobre significaciones imaginarias en torno a las masculinidades en la región oriental de Cuba. Primeramente, rescatamos momentos relevantes del desarrollo de los estudios de masculinidades en el país y algunas contribuciones teóricos que consideramos necesarias para comprender la producción de las masculinidades. Presentamos, además, los resultados cualitativos que emergieron de grupos de discusión realizados con hombres.

Estudios de caso y la falsificación Popperiana: una nota de investigación sobre el artículo de Flyvbjerg titulado "Cinco malentendidos acerca de la investigación mediante los estudios de caso"

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Roberto Sarmiento

2018-01-01

Full Text Available Esta nota de investigación presenta nuevas ideas acerca de importantes aspectos metodológicos relacionados con la aplicación de los resultados obtenidos por medio de "estudios de caso". Los autores respetamos el punto de vista que afirma que los estudios de caso deben ser utilizados para tener un mejor entendimiento de las interpretaciones subjetivas de fenómenos que son socialmente construidos por los diversos actores involucrados. El enfoque sobre la ciencia propuesto por Karl POPPER reconoce que los resultados de todas las investigaciones son falibles y teórico-dependientes. Sin embargo, POPPER también comenta que es posible proponer procedimientos críticos y objetivos que faciliten el poner a prueba intersubjetivamente (y posiblemente, falsificar los resultados de investigaciones científicas. Nuestra artículo amplía un tema especifico planteado por Bent FLYVBJERG (2004, 2006. Él acierta al decir que de acuerdo a la lógica Popperiana, una proposición científica puede ser falsificada con la evidencia encontrada en un solo estudio de caso. Sin embargo, también se debe especificar que una proposición científica puede ser lógicamente falsificada con evidencia única (como la obtenida en un estudio de caso sólo cuando ésta plantea un fenómeno que ocurre en todos los casos (i.e., cuando la proposición tiene las características de una teoría universal-determinística. Nuestro objetivo es crear conciencia sobre el papel importante que tienen los estudios de caso cualitativos en el avance del conocimiento científico (en el sentido Popperiano. De esta manera, esperamos contribuir a un debate incluyente sobre la metodología de investigación conocida como estudios de caso.

Dos estudios de casos

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Hernán Guillermo Salazar Morales

1989-04-01

Full Text Available RESUMEN A continuación se presenta dos casos de estudio en donde se puede apreciar a la forma  como se establecen  las relaciones en una organización y lo que una DECISION  puede llegar a incidir en el desarrollo de las operaciones de una empresa. Decisiones basadas en la intuición, o en corazonadas, frecuentemente conducen en dirección equivocada, ocasionando pérdidas en tiempo, personal y dinero. El proceso de toma de decisiones deben ser TAREAS ESTRUCTURADAS que se sustenten con hechos. Su ejecución debe hacerse secuencialmente y cumplir con cada uno de sus pasos. El diseño de los  casos está orientado para que  sirvan como material de aplicación en la asignatura de  taller de planeación.

Assessment of Feeding Acceptance and Injury of Kerman Pistachios, Pistacia vera, by Brown Marmorated Stink Bug (Hemiptera: Pentatomidae)

Science.gov (United States)

Kamiyama, Matthew T; Hernandez, Gabriel; Nay, Justin; Hoddle, Mark S

2017-01-01

Abstract In the United States, California (CA) is the primary commercial producer of pistachio nuts, Pistacia vera L. (Anacardiaceae). The brown marmorated stink bug (BMSB), Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), an invasive and polyphagous insect pest from Asia, has established in urban areas in several pistachio-growing counties in CA. Breeding BMSB populations have not been detected in commercial pistachio acreage. However, the detection of BMSB in Kern and Fresno counties, major Kerman pistachio producing areas in CA, underscored key knowledge gaps on BMSB ecology in CA and motivated investigations on the susceptibility of pistachio nuts to BMSB feeding. Laboratory feeding trials conducted in quarantine under permit indicated that adult BMSB stylets can penetrate developing pistachio shells and associated feeding was correlated with kernel necrosis for nuts collected mid to late season (June to August 2016). Feeding damage estimates indicated that higher levels of kernel injury were associated with female BMSB when compared to feeding by male BMSB. These results suggest that there is probable risk of feeding damage to field grown pistachios from BMSB. The implications of this study for BMSB pest management in the CA pistachio system and future research directions are discussed. PMID:29117381

Comorbilidad psicopatológica en el alcoholismo: un estudio descriptivo

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Natalia Landa

2006-01-01

Full Text Available En este estudio se lleva a cabo un análisis del perfil de bebida y de la comorbilidad psicopatológica en 50 pacientes alcohólicos que acuden en busca de tratamiento a un programa ambulatorio de Proyecto Hombre de Navarra. Para ello, se lleva a cabo un estudio ex post facto, de carácter retrospectivo y con un grupo cuasi control. Se utilizan los criterios diagnósticos del DSM-IV-TR para la dependencia alcohólica, el Müncher Alkoholismus Test (MALT para valorar la gravedad del alcoholismo y el SCL-90-R como medida de la sintomatología asociada. Los resultados obtenidos muestran la presencia de numerosa sintomatología psicopatológica, con elevaciones significativas en la mayoría de las dimensiones del SCL-90-R, tanto en los hombres como en las mujeres de la muestra. La comparación con las muestras normativas refleja que los alcohólicos de la muestra presentan más síntomas psicopatológicos que la población normal, pero menos que la población psiquiátrica. Asimismo, la gravedad del alcoholismo se relaciona de forma significativa con la mayor presencia e intensidad de comorbilidad. Por último, se comentan las implicaciones de este estudio para la práctica clínica y para la investigación futura.

Panorama sobre los estudios de clima organizacional en Bogotá, Colombia(1994-2005

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Diana Vega

2006-01-01

Full Text Available El interés por el estudio del clima organizacional ha crecido rápidamente durante los últimos años, ya que las organizaciones, a través de la implementación de sistemas gestión de calidad y la inclusión de dicho tema en los indicadores de gestión, la han asumido como uno de los elementos básicos para generar mejoramiento continuo. Así, el objetivo de este artículo es presentar el panorama de los estudios de clima organizacional(CO en Bogotá, D.C. (Colombia, hallados en 10 instituciones de educación superior y 2 bibliotecas públicas, de los años 1994 a 2005. Se revisaron 168 documentos, de los cuales se tomaron, como base para el presente artículo, 93 en psicología del trabajo y las organizaciones y áreas relacionadas con la gestión humana; de estos, a suvez, 67 son trabajos de grado (48 en pregrado y19 en postgrado, 11 artículos científicos y 15 libros. Esta revisión permitió identificar las diferentes definiciones, los autores más representativos citados en los trabajos consultados, los factores asociados al estudio del clima organizacional, los instrumentos utilizados para medirlo y el abordaje del tema que se hace desde diferentes disciplinas en el contexto objeto de estudio.

Desplazamiento activo de los adolescentes al centro de estudios y funcionamiento familiar

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Eva Sanz Arazuri

2017-06-01

Full Text Available El presente estudio analiza el desplazamiento activo al centro de estudios del alumnado de secundaria postobligatoria y su posible relación con el funcionamiento interno familiar atendiendo de forma conjunta a dos constructos fundamentales: la cohesión y la flexibilidad entre padres e hijos. 1764 jóvenes (15 a 18 años, cumplimentan un cuestionario ad hoc y el FACES IV. Se detectan diferencias significativas a través del coeficiente V de Cramer y se efectúan Anova de un factor y análisis de contrastes, para una p < 0.05. Menos de la mitad de los adolescentes españoles (el 45.7% se desplazan activamente a su centro de estudios, siendo significativamente y ligeramente superior el porcentaje de hombres frente al de mujeres. El 91.2% de los estudiantes de secundaria posobligatoria en España perciben que el funcionamiento interno de su familia es sano. El 89.6% indican una buena cohesión entre los miembros de su familia y un 88.3% señalan que gozan de una flexibilidad familiar saludable. Los estudiantes que acuden al centro de estudios andando perciben un funcionamiento familiar menos sano que quienes se desplazan en cualquier medio de transporte motorizado. Se refuerza la necesidad de promocionar el transporte activo entre los escolares en general, y en estas edades en especial, a través de programas de intervención dirigidos a estudiantes y sus familiares, concienciando sobre los beneficios saludables del desplazamiento activo, tanto en su dimensión física como en la psicológica y social.

Percentiles de salto con contramovimiento en escolares de Bogotá, Colombia: Estudio FUPRECOL

OpenAIRE

Ferro Vargas, Martha

2016-01-01

Objetivo: Determinar la distribución por percentiles de salto con contramovimiento (CMJ) en una población escolar de Bogotá, Colombia, perteneciente al estudio Fuprecol. Métodos: Estudio transversal realizado entre 2846 niños y 2754 adolescentes, entre 9 a 17 años de edad, pertenecientes a 18 instituciones educativas oficiales de Bogotá, Colombia. Se evaluó el CMJ, de acuerdo, con lo establecido por la batería de condición física, Fuprecol. Se calcularon, los percentiles (P3, P...

ESTUDIO MAGNETICO DE SISTEMAS POLIMETALICOS DE METALES DE LA PRIMERA SERIE DE TRANSICION

OpenAIRE

CAÑON MANCISIDOR, WALTER ALBERTO; CAÑON MANCISIDOR, WALTER ALBERTO

2013-01-01

En este trabajo de tesis se abordó la síntesis, caracterización estructural y el estudio magnético de nuevos y novedosos sistemas polinucleares de cero dimensionalidad. Estos complejos polinucleares fueron obtenidos por síntesis tradicional y síntesis solvotermal. El estudio magnético de estos compuestos se realizó por medio de técnicas experimentales y teóricas. Siete nuevos compuestos trinucleares oxo centrados de FeIII fueron obtenidos por síntesis solvotermal los cuales fueron cara...

Litiasis renal: estudio y manejo endocrinológico

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V. Gilberto González, Dr.

2013-09-01

Full Text Available La litiasis renal es causa de importante morbilidad y costo económico, afectando hasta el 15% de la población. Además, la litiasis renal puede ser expresión también de enfermedades extrarrenales, entre las cuales destaca riesgo aumentado de osteoporosis. Estudios nacionales muestran que las causas de litiasis renal en Chile son similares a las comunicadas internacionalmente, destacando la hipercalciuria idiopática como el principal factor de riesgo. A pesar de los avances en técnicas urológicas de remoción de cálculo, éstas no modifican la historia natural de la litiasis renal. Así, en los pacientes sin tratamiento médico, la recurrencia es la regla más que la excepción. En esta revisión se actualiza el estudio y manejo endocrinológico de la litiasis renal, para el cual la evidencia muestra que éste es eficaz y seguro en la prevención de recurrencia de litiasis renal y control de enfermedades asociadas, complementando así el manejo urológico de esta importante enfermedad.

Presentación de Atlánticas. Revista Internacional de Estudios Feministas

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Rosa Cobo Bedia

2016-12-01

Full Text Available El Centro de Estudios de Género y Feministas ha puesto en marcha Atlánticas. Revista Internacional de Estudios Feministas con el apoyo de la Universidade da Coruña. Con esta publicación digital queremos contribuir, junto a revistas de otras universidades españolas, a la difusión de la teoría feminista y los estudios de género. Las señas de identidad de esta revista son el rigor intelectual y la pluralidad ideológica. Atlánticas, sin embargo, tiene la vista puesta no solo en la universidad sino también en la sociedad civil, pues sabemos que las reflexiones feministas solo son posibles si existe un movimiento feminista activo, crítico y plural. Consideramos que la teoría y la práctica política son inseparables. En el mismo sentido, esta revista no se dirige solo a la comunidad académica y a la sociedad civil española y portuguesa sino también a espacios universitarios y sociales de América Latina, Centroamérica y el Caribe.

Infestação de Aetalion reticulatum (Linnaeus (Hemiptera: Auchenorrhyncha: Aethalionidae em Plantas de Euterpe oleracea Martius (Arecaceae no Estado do Acre

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Rodrigo Santos

2015-04-01

Abstract. The açai palm (Euterpe oleracea Martius is a native palm tree from the Amazon region floodplains and may be indicated as the most economically profitable species of this genus. Its fruit pulp is extracted and widely consumed by the population of northern Brazil in several ways. With the expansion of the planted area many factors may affect the production and limit the cultivation, highlighting the occurrence of insect pests that cause losses in production. This report presents the first occurrence of the leafhopper Aetalion reticulatum (Linnaeus (Hemiptera: Auchenorrhyncha: Aethalionidae in E. oleracea plants. The occurrence of this insect associated with açai palms in Rio Branco, Acre, increases the list of hosts for this leafhopper in Brazil and reinforces the need for studies of population dynamics, survey of natural enemies, levels of damage and control methods in order to anticipate population outbreaks of this pest in commercial plantations of açai palms in the State.

Estudios ecológicos en salud ambiental: más allá de la epidemiología

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Luis C. Blanco-Becerra

2015-08-01

Full Text Available Los estudios ecológicos se caracterizan por tener como unidad de análisis a las poblaciones, y constituyen una fuente importante y frecuente de información comprobada en salud ambiental. En esta revisión se resumen los fundamentos de los estudios ecológicos, partiendo de la premisa de que es posible hacerlos con métodos cuantitativos, cualitativos o mixtos. Se presenta la lógica que subyace a su diseño, y su papel en la exploración de la causalidad, las variables y las categorías de análisis, los principales diseños y las técnicas de recolección de datos. Igualmente, se dan ejemplos de estudios ecológicos llevados a cabo en América Latina, y se discuten algunos de los problemas metodológicos frecuentes y las posibles vías para abordarlos. Por último, se resalta la relevancia de los estudios ecológicos cuantitativos y cualitativos en salud ambiental como una forma de superar el individualismo conceptual y metodológico hegemónico, que resulta insuficiente para el estudio de la salud en las poblaciones.

LIDERAZGO MULTICULTURAL: ESTUDIO COMPARATIVO INDIA-MÉXICO

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BERTA ERMILA MADRIGAL TORRES

2017-01-01

Full Text Available En este artículo se presenta un estudio de caso de una empresa donde colaboran directivos de dos culturas: México e India; se plantean preguntas de investigación como: ¿cuáles son los valores, actitudes y habilidades que ambas culturas esperan de sus líderes?, ¿cuáles son las habilidades del líder y sus estilos de liderazgo? y ¿cuál es la distancia y dimensión del poder de los líderes de ambas culturas? Se diseñó un instrumento con las cinco características de la descripción de la personalidad enumeradas por Goldberg (1990, la aproximación de estilo de liderazgo de Madrigal (2009, y dimensión de la incertidumbre y distancia del poder con la teoría de Northouse (2012. Para poder llevar a cabo este estudio se encuestaron a 102 directivos de cultura india y mexicana en diferentes aspectos relacionados con la percepción de liderazgo. Los resultados demuestran que tanto los mexicanos como los indios tienden a preferir un estilo de liderazgo democrático. Finalmente se presentan como hallazgos las diferencias existentes en el colectivismo institucional y en la orientación al futuro de ambas culturas.

Estudio hidrogeológico del valle de Mala

OpenAIRE

Ministerio de Agricultura. Dirección General de Aguas, Suelos e Irrigaciones

1980-01-01

Determina el recurso hídrico subterráneo del valle del río Mala, mediante el análisis e investigación de las características hidrogeológicas, en base a las informaciones de diferentes etapas del estudio; para de esta manera, racionalizar mejor su uso, dando cumplimiento así a lo dispuesto por la Ley General de Aguas.

Estudio de las publicaciones sobre contabilidad de gestión en Brasil y España

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Rogério João Lunkes

2013-04-01

Full Text Available En las últimas décadas, se han producido cambios importantes en la contabilidad de gestión con la inclusión de nuevos temas y métodos de investigación, revistas exclusivas y, en especial, estudios con perspectivas multidisciplinarias. Estos cambios se han detectado con estudios divulgados en publicaciones de revistas importantes. En este contexto surge la siguiente pregunta de investigación: ¿Cuál es el perfil de las investigaciones a respecto de la contabilidad de gestión en España y Brasil? Así, el objetivo del presente trabajo es identificar y analizar los temas y métodos de investigación aplicados en los estudios de contabilidad de gestión en España y Brasil, presentar cómo esas investigaciones son importantes para el desarrollo del área de contabilidad de gestión y compararlas con los estudios realizados en revistas anglosajonas por Hesford, Lee, Van Der Stede, e Young (2007. Con este fin se seleccionaron, entre 2001 y 2010, en primer lugar, siete revistas contables españolas que figuran en la base de datos IN-RECS (Índice de Impacto de Revistas Españolas de Ciencias Sociales en donde hemos encontrado 421 artículos. En segundo lugar se han seleccionado veintinueve revistas brasileñas de contabilidad, administración, gestión, finanzas y negocios evaluadas por CAPES (Coordinación de Perfeccionamiento de la Educación Superior, en donde se han encontrado 321 artículos. Los resultados muestran que los trabajos en contabilidad de gestión no han ocupado un lugar destacado en las publicaciones analizadas. Entre los temas más relevantes se encuentran el de planificación y control con énfasis en el elemento de medición y evaluación del desempeño. El desarrollo de los estudios se produce, en gran medida, mediante la aplicación de estudios de caso y survey en Brasil y revisión y estudio de caso en España.

DE AGUA. ESTUDIO PRELIMINAR

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Esther E. Pellizzari

2015-01-01

Full Text Available El objetivo del presente estudio fue investigar la resistencia al arsénico en cultivos puros de Pseudomonas aeruginosa , aislada de aguas subterráneas de Presidencia Roque Sáenz Peña, provincia de Chaco y evaluar la posibilidad de su uso para la remoción de este contaminante presente en las aguas subterráneas. Las cepas fueron inmovilizadas en piedra natural y se cu ltivaron en caldo de sales y 1 mgAs/L . Se observó la resistencia al arsénico y la formación de biofilm , logrando la interacción entre la s células, roca y arsénico . L a remoción de arsénico se evaluó durante 3 meses y el porcentaje de eliminación de arsénico al final del experimento fue 60%.

Envejecimiento satisfactorio e indicadores de fragilidad en los mayores de la comunidad. Estudio Octabaix

OpenAIRE

Ferrer, Assumpta; Formiga, Francesc; Sanz, Héctor; Monserrate, Elena; Verges, Dolors

2014-01-01

El envejecimiento satisfactorio como estado óptimo de un proceso de adaptación es poco conocido en las personas más mayores. Objetivo: Describir envejecimiento satisfactorio y analizar su asociación con indicadores de fragilidad en personas de 86 años. Diseño: Estudio descriptivo transversal al segundo año de seguimiento de un ensayo clínico (estudio Octabaix). Emplazamiento: Siete centros de atención primaria. Participantes: Personas nacidas en 1924, no institucionalizadas. Me...

Estudio de técnicas de inserción de marcas de agua sobre software

OpenAIRE

Jaimez Moruno, Marc

2008-01-01

Este trabajo es un estudio de las distintas técnicas de software watermarking existentes para la protección de la propiedad intelectual contenida en un programa. Partiendo de este estudio se propone una implementación para usar técnicas watermarking en la protección de agentes móviles. Concretamente se implementa una solución para detectar ejecuciones deshonestas por parte de host maliciosos

Selection of Reference Genes for Expression Studies in Diaphorina citri (Hemiptera: Liviidae).

Science.gov (United States)

Bassan, Meire Menezes; Angelotti-Mendonc A, Je Ssika; Alves, Gustavo Rodrigues; Yamamoto, Pedro Takao; Moura O Filho, Francisco de Assis Alves

2017-12-05

The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), is considered the main vector of the bacteria associated with huanglongbing, a very serious disease that has threatened the world citrus industry. The absence of efficient control management protocols, including a lack of resistant cultivars, has led to the development of different approaches to study this pathosystem. The production of resistant genotypes relies on D. citri gene expression analyses by RT-qPCR to assess control of the vector population. High-quality, reliable RT-qPCR analyses depend upon proper reference gene selection and validation. However, adequate D. citri reference genes have not yet been identified. In the present study, we evaluated the genes EF 1-α, ACT, GAPDH, RPL7, RPL17, and TUB as candidate reference genes for this insect. Gene expression stability was evaluated using the mathematical algorithms deltaCt, NormFinder, BestKeeper, and geNorm, at five insect developmental stages, grown on two different plant hosts [Citrus sinensis (L.) Osbeck (Sapindales: Rutaceae) and Murraya paniculata (L.) Jack (Sapindales: Rutaceae)]. The final gene ranking was calculated using RefFinder software, and the V-ATPase-A gene was selected for validation. According to our results, two reference genes are recommended when different plant hosts and developmental stages are considered. Considering gene expression studies in D. citri grown on M. paniculata, regardless of the insect developmental stage, GAPDH and RPL7 have the best fit as reference genes in RT-qPCR analyses, whereas GAPDH and EF 1-α are recommended as reference genes in insect studies using C. sinensis. © The Author(s) 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Temperature thresholds and thermal requirements for development of Nasonovia ribisnigri (Hemiptera: Aphididae).

Science.gov (United States)

Diaz, Beatriz Maria; Muñiz, Mariano; Barrios, Laura; Fereres, Alberto

2007-08-01

Early detection of Nasonovia ribisnigri (Mosley) (Hemiptera: Aphididae) on lettuce is of primary importance for its effective control. Temperature thresholds for development of this pest were estimated using developmental rates [r(T)] at different constant temperatures (8, 12, 16, 20, 24, 26, and 28 degrees C). Observed developmental rates data and temperature were fitted to two linear (Campbell and Muñiz and Gil) and a nonlinear (Lactin) models. Lower temperature threshold estimated by the Campbell model was 3.6 degrees C for apterous, 4.1 degrees C for alates, and 3.1 degrees C for both aphid adult morphs together. Similar values of the lower temperature threshold were obtained with the Muñiz and Gil model, for apterous (4.0 degrees C), alates (4.2 degrees C), and both adult morphs together (3.7 degrees C) of N. ribisnigri. Thermal requirements of N. ribisnigri to complete development were estimated by Campbell and Muñiz and Gil models for apterous in 125 and 129 DD and for both adult morphs together in 143 and 139 DD, respectively. For complete development from birth to adulthood, the alate morph needed 15-18 DD more than the apterous morph. The lower temperature threshold determined by the Lactin model was 5.3 degrees C for alates, 2.3 degrees C for apterous, and 1.9 degrees C for both adult morphs together. The optimal and upper temperature thresholds were 25.2 and 33.6 degrees C, respectively, for the alate morph, 27 and 35.9 degrees C, respectively, for the apterous morph, and 26.1 and 35.3 degrees C, respectively, for the two adult morphs together. The Campbell model provided the best fit to the observed developmental rates data of N. ribisnigri. This information could be incorporated in forecasting models of this pest.

Estudio sobre el estado nutricional, calidad de vida, y capacidad funcional en pacientes con fibromialgia. Estudio ENCAVI

OpenAIRE

Arranz, Laura Isabel

2012-01-01

[spa] La fibromialgia es una enfermedad reumática, clasificada con el código OMS CIE-10- M79.7 (versión 2007), de carácter crónico que causa dolor muscular generalizado, rigidez, fatiga, alteraciones del sueño y trastornos cognitivos entre otros síntomas. La prevalencia en España está alrededor del 2.4%, aunque algunos estudios han situado esta cifra entorno al 4%, siendo las mujeres las que más la padecen, con gran diferencia respecto a los hombres. La fibromialgia, además, se presenta frecu...

Estudios pioneros en torno al origen del lenguaje natural

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Martínez Contreras, Jorge

2011-02-01

Full Text Available It has being an ancient desire to ask apes what their natural lives are. De la Mettrie was the first to propose, in the 18^th C., that the sign language of deaf adults could be used with them since they do not speak. We enhance here some of the pioneering projects of the two strategies for this endeavor: the use of ASL and the utilization of lexigrams and computers. Besides the ancient communicative quest with them, the evolutionist’s perspective has seen in these studies a way to find out how the natural language (NL emerged in hominids. If it is clear that apes do no possess totally the NL, the linguistic turn in primatology has left way, as in philosophy, to more complex field and laboratory cognitive studies of less anthropocentric nature.

Tratar de hablar con los simios y preguntarles cosas sobre su vida natural es un viejo deseo. De la Mettrie propone, en el s. XVIII, que se les enseñe el lenguaje de los sordos en vista de que no pueden hablar. Resaltamos aquí algunos estudios pioneros en relación con las dos estrategias llevadas a cabo para tratar de hablar con los simios: el uso del lenguaje americano de sordos (ASL y el de los lexigramas y computadoras. Además del viejo interés interrogativo humano hacia ellos, la perspectiva evolucionista ha visto en estos estudios un medio de investigar cómo surgió el lenguaje natural (LN en homínidos. Si queda claro que los simios no poseen totalmente el LN, el giro lingüistico en primatología ha cedido, como en filosofía, el paso a estudios cognitivos más complejos, de campo y de laboratorio, de orientación menos antropomórfica.

El fenómeno administrativo como objeto de estudio

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Carlos Ramírez Cardona

2013-07-01

Full Text Available El perfil de la ciencia o de las ciencias llamadas administrativas resulta confuso cuan teoría general y el objeto de estudio de otras disciplinas relacionadas con el proceso administrativo o que constituyen campos de aplicación de principios y técnicas de la teoría general.

Análisis geoestadístico en el estudio de la explotación de los recursos minerales

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Chica Olmo, Mario

2013-01-01

La Tesis Doctoral del Sr. Chica Olmo constituye una aproximación geoestadística al estudio de explotación de los recursos minerales de modo que en la memoria se recogen las principales conclusiones metodológicas teóricas y practicas alcanzadas a través de diferentes estudios y proyectos llevados a cabo en el dominio minero referentes a depósitos de naturaleza variada como carbón uranio plomo plata... En gran medida los anteriores estudios han sido realizados en el centro de geoestadística de ...

ESTUDIO DE LA PROACTIVIDAD MEDIOAMBIENTAL EN LAS EMPRESAS INDUSTRIALES DE LA COMUNIDAD VALENCIANA: IDENTIFICACIÓN DE PATRONES DE COMPORTAMIENTO

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Carrascosa López, Conrado

2012-01-01

Resumen de la Tesis "Estudio de la proactividad medioambienta:l:e!l_las empresas industriales de la Comunidad Valenciana: Identificación de patrOliés de _ comportamiento. Interés del estudio. El propósito de esta tesis es estudiar en detalle el concepto proactividad medioambiental en la empresa y su aplicación a las industrias manufactureras. Objetivos. El objetivo principal de este estudio es analizar el sector industrial estudiando la ...~ � � _.. .... l..- '=" ' :-~...

Estudio sobre las relaciones del síndrome de burnout con algunos factores psicosociales

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Andrea López Fernández

2015-07-01

Full Text Available El Síndrome de Burnout es un problema psicosocial relevante porque el trabajador pierde su capacidad de motivación por el trabajo, su rendimiento laboral es bajo y se deteriora su salud física y mental, por eso se considera que es un problema importante sobre todo en el ámbito penitenciario, donde los trabajadores están sometidos a constantes presiones. El objetivo de este estudio es analizar la relación existente entre Burnout, autoestima, género y experiencia laboral en funcionarios de prisiones. El estudio se realizó con 34 funcionarios penitenciarios de la cárcel de Albolote (Granada. Los instrumentos utilizados fueron: la Escala de Autoestima de Rosenberg (1965 y el Cuestionario de Maslach Burnout Inventory (1986. Los resultados obtenidos muestran que no existen relaciones significativas entre Burnout, autoestima, experiencia laboral y género; aunque se han encontrado algunas diferencias de género en las variables de estudio.

Software para mejorar la aplicación de técnicas cuantitativas en estudios prospectivos

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Amaury Cabarcas Álvarez

2013-06-01

Full Text Available Durante las dos últimas décadas se ha observado preocupación de organizaciones para lograr competitividad y obtener estabilidad en el mercado, impulsándolas a analizar ventajas de ir a un futuro deseado, haciendo uso de herramientas como los estudios prospectivos. Con el fin de optimizar la aplicación de estudios prospectivos, se han desarrollado herramientas de apoyo que aún no abarcan ciertos intereses de los involucrados como el uso de recursos económicos, ambientales, tecnológicos y humanos. Para suplir la necesidad encontrada, se planteó un software que contribuya al acompañamiento de estudios prospectivos apoyándose de tecnologías Web 2.0 independientemente de técnicas utilizadas por la persona guía del mismo, para lograr racionalizar recursos aprovechando las ventajas que ofrece la web. La investigación permitió concluir que los estudios prospectivos constituyen una alternativa viable para las organizaciones que desean planificar para alcanzar sus objetivos empresariales. Sin embargo, el intento de lograr el futuro deseable traería una serie de costos, que se incrementarán cuando la aplicación de estos estudios se lleve a cabo al margen de las herramientas, software y modelos adecuados. Por esta razón, el hombre debe emplear herramientas tecnológicas que combinen métodos, software, capacidad colaborativa y de integración como la ofrecida por la Web 2.0 para optimizar sus procesos y permitir así, que áreas como la prospectiva, alcancen un alto nivel de eficiencia y masificación

Life table parameters of three Mirid Bug (Adelphocoris species (Hemiptera: Miridae under contrasted relative humidity regimes.

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Hongsheng Pan

Full Text Available The genus Adelphocoris (Hemiptera: Miridae is a group of important insect pests of Bt cotton in China. The three dominant species are A. lineolatus, A. suturalis, and A. fasciaticollis, and these species have different population dynamics. The causal factors for the differences in population dynamics have not been determined; one hypothesis is that humidity may be important for the growth of Adelphocoris populations. In the laboratory, the demographic parameters of the three Adelphocoris species were compared when the mirid bugs were subjected to various levels of relative humidity (40, 50, 60, 70 and 80% RH. Middle to high levels of RH (60, 70 and 80% were associated with higher egg and nymph survival rates and increased adult longevity and female fecundity. Lower humidity levels (40 and 50% RH had negative effects on the survival of nymphs, adult longevity and fecundity. The intrinsic rate of increase (rm, the net reproductive rate (R0 and the finite rate of increase (λ for each Adelphocoris species increased with increasing RH. Significant positive relationships were found between RH and the life table parameters, rm, R0 and λ for the three Adelphocoris species. These results will help to better understand the phenology of the three Adelphocoris species, and the information can be used in population growth models to optimize pest forecasting and management strategies for these key pests.

Application of plant growth regulators mitigates chlorotic foliar injury by the black pecan aphid (Hemiptera: Aphididae).

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Cottrell, Ted E; Wood, Bruce W; Ni, Xinzhi

2010-11-01

Black pecan aphid, Melanocallis caryaefoliae (Davis) (Hemiptera: Aphididae), feeding elicits localized chlorotic injury to pecan foliage [Carya illinoinensis (Wangenh.) K Koch] and apparent acceleration of leaf senescence and defoliation. The ability of certain plant growth regulators (PGRs) (forchlorfenuron, gibberellic acid and aviglycine) to prevent M. caryaefoliae from triggering pecan leaf chlorosis and senescence-like processes was evaluated on two dates in both 2006 and 2007. Treatments were applied to orchard foliage and used in laboratory leaf-disc bioassays to assess possible reduction in aphid-elicited chlorosis and concomitant effects on aphid mortality and development. Foliage pretreated with forchlorfenuron + gibberellic acid prior to being challenged with aphids resulted in significantly less aphid-elicited chlorosis than did control or aviglycine-treated leaf discs. No PGR affected aphid mortality; however, development time was increased by forchlorfenuron + gibberellic acid in 2006 and by aviglycine + gibberellic acid on one date in 2007. Certain PGRs possess the potential for usage on pecan to protect foliar canopies from M. caryaefoliae via changes in the susceptibility of the host leaf to senescence-like factors being introduced by feeding aphids. This protective effect on host foliage and the associated suppressive effect on development of feeding aphids might also be relevant to pest management programs on other aphid-crop systems in which aphid-elicited chlorosis and senescence-like processes can limit profitability. Published 2010 by John Wiley & Sons, Ltd.

Species clarification of Isaria isolates used as biocontrol agents against Diaphorina citri (Hemiptera: Liviidae) in Mexico.

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Gallou, Adrien; Serna-Domínguez, María G; Berlanga-Padilla, Angélica M; Ayala-Zermeño, Miguel A; Mellín-Rosas, Marco A; Montesinos-Matías, Roberto; Arredondo-Bernal, Hugo C

2016-03-01

Entomopathogenic fungi belonging to the genus Isaria (Hypocreales: Cordycipitaceae) are promising candidates for microbial control of insect pests. Currently, the Mexican government is developing a biological control program based on extensive application of Isaria isolates against Diaphorina citri (Hemiptera: Liviidae), a vector of citrus huanglongbing disease. Previous research identified three promising Isaria isolates (CHE-CNRCB 303, 305, and 307; tentatively identified as Isaria fumosorosea) from Mexico. The goal of this work was to obtain a complete morphological and molecular characterization of these isolates. Comparative analysis of morphology established that the isolates showed similar characteristics to Isaria javanica. Multi-gene analysis confirmed the morphological identification by including the three isolates within the I. javanica clade. Additionally, this work demonstrated the misidentifications of three other Isaria isolates (CHE-CNRCB 310 and 324: I. javanica, formerly I. fumosorosea; CHE-CNRCB 393: I. fumosorosea, formerly Isaria farinosa), underlying the need for a full and correct characterization of an isolate before developing a biological control program. Finally, the inter-simple sequence repeat (ISSR) genotyping method revealed that the CHE-CNRCB 303, 305, and 307 isolates belong to three different genotypes. This result indicates that ISSR markers could be used as a tool to monitor their presence in field conditions. Copyright © 2015 The British Mycological Society. Published by Elsevier Ltd. All rights reserved.

Estudio de las propiedades mecánicas del sistema óseo (segunda parte)

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Mendoza, Alvaro

2011-01-01

Los estudios se hicieron bajo la supervisión del área de Biomecánica. Los ensayos dieron a conocer los valores reales de los esfuerzos mecánicos que es capaz de resistir el tejido óseo. Se elaboraron curvas de esfuerzo-deformación, con la ayuda de deformímetros mecánicos y rosetas de deformación, encontrándose las diferentes propiedades mecánicas y dando una base sólida para estudios posteriores en el área, que ayuden aún más al desarrollo de la bioingeniería en Colombia.

Los estudios hispanos sobre el África subsahariana : una perspectiva histórica

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Santana Pérez, Germán; Ordóñez del Pino, Mariví

2007-01-01

La escasa importancia del colonialismo español en África explica en parte por qué los estudios hispanos sobre el África subsahariana han sido casi desconocidos. Sin embargo, éstos gozan de una larga trayectoria e incluso han sido pioneros en algunos casos durante el pasado. En este artículo hemos pretendido dar una visión general de estos estudios hispanos desde la Antigüedad hasta la actualidad. La información que procedía de África se incrementó en los inicios de la Edad Moderna debido a la...

LOS ESTUDIOS DE MERCADO Y PERFILES DE SECTOR COMO HERRAMIENTAS ÚTILES PARA LA TOMA DE DECISIONES

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Yolanda Morejón-Bravo

2016-01-01

Full Text Available En primer lugar, se ofrece una breve explicación de los fundamentos teóricos de la inteligencia empresarial y sus productos, haciendo énfasis en los perfiles estratégicos, y dentro de ellos, en los perfiles de sector. También, se hace énfasis en los estudios de mercado y sus características. En segundo lugar, se presentan dos casos de estudio (un perfil de sector y un estudio de mercado, que demuestran la importancia de estos productos y servicios de inteligencia competitiva, para la toma de decisiones lo más acertada posible, en las organizaciones.

ESTUDIOS DE CASOS Y CONTROLES: A PROPÓSITO DE DOS ESTUDIOS EN CIMEL

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Francisco Javier Bonilla-Escobar

2013-08-01

Full Text Available Los estudios de casos y controles han existido desde el siglo XIX con el analisis de Jhon Snow en Inglaterra sobre la fuente del Colera, y han tomado inusitada importancia despues de su puesta en marcha en diversos campos de la ciencia moderna (1, siendo objeto de amplias discusiones metodologicas hace mas de 50 anos. En los dos numeros anteriores de la revista CIMEL, se encuentran dos de estas publicaciones, tituladas: Factores asociados al Sindrome de Aspiracion Meconial en el hospital Jose Cayetano Heredia Piura-Peru, de Purizaca y col. (2, y Factores asociados al desarrollo de preeclampsia en un hospital de Piura, Peru, de Benites-Condor y col. (3. Reconociendo la importancia de este tipo de publicaciones y el trabajo requerido para su elaboracion, queremos mencionar aciertos y falencias metodologicas que hemos encontrado en estas publicaciones y las cuales afectan las afirmaciones de los autores

La imagen de Estudios Generales y la calidad de gestión. Un modelo de análisis multivariable

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José Alberto Rodríguez Bolaños

2015-05-01

Full Text Available El artículo versa sobre el diseño, fundamentación teórica y aplicación práctica del modelo de análisis multivariable o factorial para medir la calidad de atención al cliente (estudiantes de estudios generales, por parte del equipo docente. El artículo se divide en tres partes: la primera es una introducción teórica sobre la calidad del servicio, mejoramiento continuo, la importancia del dato estadístico y la evaluación sistemática. La segunda parte es una reflexión sobre los métodos cuantitativos y cualitativos, y su importancia en la medición de los procesos sociales, en particular sobre el modelo que he diseñado para la Escuela de Estudios Generales. En la tercera parte se explican las características del modelo, su fundamentación estadística en lo concerniente a las muestras de los dos estudios ya realizados, así como los antecedentes preparatorias al estudio. En esta parte, además, se analizan algunos datos estadísticos que expresan los indicadores de gestión, según los factores de estudio, sus variables, acorde a cada una de las secciones de Estudios Generales y de la Escuela en general.

Mediaciones, comunicación y colonialidad: encuentros y desencuentros de los estudios culturales y la comunicación en Latinoamérica

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Juan Carlos Valencia Rincón

2012-01-01

Full Text Available Los estudios en comunicación y los estudios culturales en Latinoamérica comparten trayectorias similares que durante mucho tiempo fueron convergentes. Sin embargo, la influencia del Grupo de Estudios Subalternos Latinoamericanos y del grupo Modernidad/ Colonialidad ha llevado los estudios culturales a adoptar posiciones radicales que desconocen los hallazgos de la Escuela Latinoamericana de la Comunicación y los estudios en recepción. A su vez, la Escuela Latinoamericana de la Comunicación, con su interés en las hibridaciones y las resignificaciones que realizan las audiencias, ha dejado de lado el papel que desempeña la colonialidad en nuestro contexto. Las academias de comunicación también parecen estar apartándose del estudio de las mediaciones sociales, para caer en un aislamiento disciplinario profundo. Este artículo analiza la relación entre estos dos campos del saber, sus puntos de convergencia y sus diferencias.

Recilia banda Kramer (Hemiptera: Cicadellidae), a vector of Napier stunt phytoplasma in Kenya

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Obura, Evans; Midega, Charles A. O.; Masiga, Daniel; Pickett, John A.; Hassan, Mohamed; Koji, Shinsaku; Khan, Zeyaur R.

2009-10-01

Napier grass ( Pennisetum purpureum) is the most important fodder crop in smallholder dairy production systems in East Africa, characterized by small zero-grazing units. It is also an important trap crop used in the management of cereal stemborers in maize in the region. However, production of Napier grass in the region is severely constrained by Napier stunt disease. The etiology of the disease is known to be a phytoplasma, 16SrXI strain. However, the putative insect vector was yet unknown. We sampled and identified five leafhopper and three planthopper species associated with Napier grass and used them as candidates in pathogen transmission experiments. Polymerase chain reaction (PCR), based on the highly conserved 16S gene, primed by P1/P6-R16F2n/R16R2 nested primer sets was used to diagnose phytoplasma on test plants and insects, before and after transmission experiments. Healthy plants were exposed for 60 days to insects that had fed on diseased plants and acquired phytoplasma. The plants were then incubated for another 30 days. Nested PCR analyses showed that 58.3% of plants exposed to Recilia banda Kramer (Hemiptera: Cicadellidae) were positive for phytoplasma and developed characteristic stunt disease symptoms while 60% of R. banda insect samples were similarly phytoplasma positive. We compared the nucleotide sequences of the phytoplasma isolated from R. banda, Napier grass on which these insects were fed, and Napier grass infected by R. banda, and found them to be virtually identical. The results confirm that R. banda transmits Napier stunt phytoplasma in western Kenya, and may be the key vector of Napier stunt disease in this region.

GORDURA, DISCRIMINACIÓN Y CLASISMO: UN ESTUDIO EN JÓVENES DE SANTIAGO DE CHILE

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María Alejandra Energici Sprovera; Elaine Acosta Gonzáles; Florencia Borquez Grancelli; Macarena Huaiquimilla Paredes

2017-01-01

Resumen El estudio de la obesidad desde la psicología social se ha realizado principalmente desde una aproximación cognitivo conductual omitiendo los contextos sociales en que se realizan juicios discriminadores. Con el objetivo de comprender los significados con que se construye la gordura y su interacción con otras formas de exclusión social, hemos realizado un estudio cualitativo de jóvenes de Santiago de Chile. Trabajamos con tres grupos de discusión, que analizamos siguiendo las directri...

Estudio y análisis de instalaciones de centrales termosolares con tecnología CCP

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MAS SANZ, JAVIER

2011-01-01

Trabajo científico técnico. El presente proyecto, trata de realizar el análisis y estudio de las plantas de generación de energía limpia y renovable, basadas en tecnología desarrollada a partir de captadores cilindro parabólicos Mas Sanz, J. (2011). Estudio y análisis de instalaciones de centrales termosolares con tecnología CCP. http://hdl.handle.net/10251/12088. Archivo delegado

El registro de los estudios observacionales: es el momento de cumplir el requerimiento de la Declaración de Helsinki

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Rafael Dal-Ré

2015-05-01

Full Text Available El sesgo de publicación es una grave deficiencia del actual sistema de comunicación de los resultados de estudios de investigación en seres humanos. Los investigadores clínicos saben que, desde el punto de vista ético, deben inscribir los ensayos clínicos antes de su inicio en un registro público. Se entiende que este hecho ayudará a reducir el sesgo de publicación. Sin embargo, la mayor parte de los estudios en seres humanos son de tipo observacional y no de tipo experimental. Se estima que se han registrado menos del 2% de los 2 millones de estudios observacionales concluidos o en curso. La revisión de 2013 de la Declaración de Helsinki exige el registro de todo estudio de investigación en seres humanos, sus muestras o datos identificables. Se propone que los agentes financiadores, como el Fondo de Investigaciones Sanitarias, requieran el registro de los estudios observacionales para proveer la financiación. Las empresas deberían hacer lo propio. Así mismo, se propone que los comités de ética de la investigación, que cumpliendo la regulación española utilizan desde 1990 la Declaración como marco de referencia para evaluar los aspectos éticos de los ensayos clínicos con medicamentos, hagan lo mismo con los estudios observacionales del ámbito sanitario; deberían, por tanto, exigir el registro del estudio antes de otorgar su aprobación definitiva. Esto permitiría educar a los investigadores de estudios observacionales en el cumplimiento de un requisito ético de reciente introducción en el código ético de mayor relevancia en la realización de investigaciones en seres humanos.

Cryptic Species Identification and Composition of Bemisia tabaci (Hemiptera: Aleyrodidae) Complex in Henan Province, China.

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Jiu, Min; Hu, Jian; Wang, Lun-Ji; Dong, Jun-Feng; Song, Yue-Qin; Sun, Hui-Zhong

2017-05-01

Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex, causing significant crop losses in China during the last decade. Although knowledge of cryptic species composition and dynamics within B. tabaci complex is critical for developing sustainable pest management strategies, limited information is available on this pest in the Henan province of China. A systematic survey of the cryptic species composition and distribution of B. tabaci complex in different locations of Henan province was conducted in 2012. The results of RAPD-PCR and the gene for the mitochondrial cytochrome oxidase subunit-1 (mtCOI) based phylogenetic relationships established using Bayesian method indicated there were four known cryptic species MEAM1, MED, Asia II 3, Asia II 9 and a new cryptic species named China 6 in Henan province. In the survey, the invasive cryptic species MED and MEAM1 were found to be predominant with wide spread distribution across the surveyed regions. On the contrary, the indigenous B. tabaci cryptic species including Asia II 3, Asia II 9 and China 6 remained with low prevalence in some surveyed regions. Cryptic species MEAM1 and MED have not completely displaced the native B. tabaci in Henan province. This current study for the first time unifies our knowledge of the diversity and distribution of B. tabaci across Henan province of China. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America.

Biological parameters and fertility life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae on strawberry

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E. S. Araujo

Full Text Available Abstract This study provides the first contribution of the biology and life table of Aphis forbesi Weed, 1889 (Hemiptera: Aphididae, an important strawberry pest throughout the world. This species lives in the crown and leaf petioles of the plant. It is difficulty to rear this species in laboratory due to protocooperation with ants observed only in the field. We studied the life cycle of A. forbesi on the leaves of the Albion strawberry cultivar at 25 ± 2 °C, 60 ± 10% relative humidity, and a 12-h photophase. The experiment was randomised with 100 replicates. The parameters of the fertility life table were calculated using TabVida. In the population studied, 25% and 46% had four and three instars, respectively. A mean of 1.43 nymphs per female per day was generated. The mean reproductive period was seven days and the mean longevity was 10 days. In every 11 days there is a generation of A. forbesi, where each female has the potential to generate between 6 to 9 individuals daily, increasing its population by 1.2 times. The average life cycle was 16.8 days. High viability observed in all instars and the resulting values of R0, rm and λ suggest that A. forbesi has the capacity to increase their numbers in a short period of time, while generating high populations in strawberry crops, requiring differential management.

Estudio antropológico de redes sociales de madres adolescentes durante el embarazo. En: Avá, nº 14

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Pasarin, Lorena

2008-01-01

La atención de la salud incluye a diversos actores sociales, por ello en su estudio debe contemplarse el papel que adquieren los contextos socioculturales. El estudio de las redes sociales resulta conveniente para abordarlos. Este trabajo presenta una aplicación del análisis de redes sociales como complemento de abordaje metodológico al estudio de las prácticas y comportamientos relacionados con la salud de madres adolescentes durante el período prenatal. Utilizando la herramienta E...

Estudio preliminar de leptospirosis en roedores y canes en salitral, Piura-1999

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Rosa Sacsaquispe C

2003-03-01

Full Text Available Objetivo: Determinar serológica y bacteriológicamente la presencia de Leptospira en muestras de suero y riñón de carnes y roedores, del distrito de Salitral, departamento de Piura (norte del Perú.Materiales y métodos: Estudio realizado en octubre de 1999. Se capturaron roedoresutilizando trampas tomahawk en las localidades de Salitral y Malacasi. Se utilizó la prueba de aglutinación microscópica (MAT para la detección de anticuerpos y el cultivo de tejido de riñón para el estudio bacteriológico. Asimismo, se evaluaron muestras de suero de canes de la localidad del Salitral.Resultados: 2 de 12 roedores identificados como Rattus rattus (16,6% reaccionaron con Leptospira serovar grypotyphosa a un título de 1/200 y 1/400, en tanto que una de las 3 muestras de suero de can colectadas reaccionó con Leptospira serovar canicola. De los 12 cultivos de las muestras de riñón de roedores ninguno fue positivo a Leptospira. Conclusiones: La detección de anticuerpos contra Leptospira en el distrito de Salitral sugiere ampliar los estudios de Leptospira en la zona.

Facilitation of a native pest of rice, Stenotus rubrovittatus (Hemiptera: Miridae), by the non-native Lolium multiflorum (Cyperales: Poaceae) in an agricultural landscape.

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Yoshioka, Akira; Takada, Mayura; Washitani, Izumi

2011-10-01

Source populations of polyphagous pests often occur on host plants other than the economically damaged crop. We evaluated the contribution of patches of a non-native meadow grass, Lolium multiflorum Lam. (Poaceae), and other weeds growing in fallow fields or meadows as source hosts of an important native pest of rice, Stenotus rubrovittatus (Matsumura) (Hemiptera: Miridae), in an agricultural landscape of northern Japan. Periodical censuses of this mirid bug by using the sweeping method, vegetation surveys, and statistical analysis revealed that L. multiflorum was the only plant species that was positively correlated with the density of adult S. rubrovittatus through two generations and thus may be the most stable and important host of the mirid bug early in the season before the colonization of rice paddies. The risk and cost of such an indirect negative effect on a crop plant through facilitation of a native pest by a non-native plant in the agricultural landscape should not be overlooked.

Isolation and Characterization of Novel Polymorphic Microsatellite Markers for Cimex hemipterus F. (Hemiptera: Cimicidae).

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Seri Masran, Siti Nor Ain; Ab Majid, Abdul Hafiz

2018-05-04

Due to the growing public health and tourism awareness, Cimex hemipterus Fabricius (Hemiptera: Cimicidae) has gained a great interest in increasing reported infestation cases in tropical regions of the world, including Malaysia. Since the information on the molecular ecology and population biology of this species are tremendously lacking, the isolation and development of molecular markers can be used to determine its genetic structure. In this study, novel microsatellite primers isolated from enriched genomic libraries of C. hemipterus were developed using 454 Roche shotgun sequencing. Seven validated polymorphic microsatellite primers were consistently amplified and characterized from 70 tropical bed bugs collected from seven locations throughout Malaysia. The number of alleles per locus identified ranged from 6 to 14. Comparison of loci for overall and between population were done with mean observed and expected heterozygosity were determined at 0.320 and 0.814, 0.320 and 0.727, respectively. Polymorphic information criteria (PIC) valued the markers as highly informative as PIC >0.5. Overall population, they are possibly in Hardy-Weinberg equilibrium with loci Ch_09ttn, Ch_01dn, and Ch_13dn showing signs of a null allele. There were no scoring errors caused by stutter peaks, no large allele dropout was detected for all loci and showed no evidence of linkage disequilibrium. In conclusion, all seven molecular microsatellite markers identified can be beneficially used to gain more information on the population genetic structure and breeding patterns of C. hemipterus as well as the relationship of dispersal and infestation.

Sequencing and Characterization of the Invasive Sycamore Lace Bug Corythucha ciliata (Hemiptera: Tingidae) Transcriptome

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Qu, Cheng; Fu, Ningning; Xu, Yihua

2016-01-01

The sycamore lace bug, Corythucha ciliata (Hemiptera: Tingidae), is an invasive forestry pest rapidly expanding in many countries. This pest poses a considerable threat to the urban forestry ecosystem, especially to Platanus spp. However, its molecular biology and biochemistry are poorly understood. This study reports the first C. ciliata transcriptome, encompassing three different life stages (Nymphs, adults female (AF) and adults male (AM)). In total, 26.53 GB of clean data and 60,879 unigenes were obtained from three RNA-seq libraries. These unigenes were annotated and classified by Nr (NCBI non-redundant protein sequences), Nt (NCBI non-redundant nucleotide sequences), Pfam (Protein family), KOG/COG (Clusters of Orthologous Groups of proteins), Swiss-Prot (A manually annotated and reviewed protein sequence database), and KO (KEGG Ortholog database). After all pairwise comparisons between these three different samples, a large number of differentially expressed genes were revealed. The dramatic differences in global gene expression profiles were found between distinct life stages (nymphs and AF, nymphs and AM) and sex difference (AF and AM), with some of the significantly differentially expressed genes (DEGs) being related to metamorphosis, digestion, immune and sex difference. The different express of unigenes were validated through quantitative Real-Time PCR (qRT-PCR) for 16 randomly selected unigenes. In addition, 17,462 potential simple sequence repeat molecular markers were identified in these transcriptome resources. These comprehensive C. ciliata transcriptomic information can be utilized to promote the development of environmentally friendly methodologies to disrupt the processes of metamorphosis, digestion, immune and sex differences. PMID:27494615

Morphology and volatile compounds of metathoracic scent gland in Tessaratoma papillosa (Drury) (Hemiptera: Tessaratomidae).

Science.gov (United States)

Zhao, D; Gao, J; Wang, Y; Jiang, J; Li, R

2012-08-01

Tessaratoma papillosa (Drury) (Hemiptera: Tessaratomidae) is a serious insect pest of litchi and longan in South China. When disturbed, this insect could release large quantities of disagreeable odorous volatiles from its scent gland. Knowledge on the scent gland and its secretion is crucial for developing the semiochemical methods to manage this pest. Morphology and ultrastructure of the metathoracic scent glands (MTGs) were studied under stereo and scanning electron microscopy, and the volatile compounds of MTGs from both male and female T. papillosa were analyzed with coupled gas chromatography-mass spectrometry (GC-MS). The MTG complex is located between the metathorax and the first abdominal segment at the ventral surface of the insect, which has a well-developed single double valve cystic-shaped orange median reservoir, paired colorless lateral glands in both sides, and a long and wavy tubular accessory gland that inlays tightly into the ventral edge around the median reservoir. The MTG opens to the body surface through paired ostioles located between the meso- and metacoxae of the evaporatorium with mushroom bodies. The GC-MS analyses showed that female and male adults have nine major volatile components in common. Tridecane is the most abundant in both females and males, reaching up to 47.1% and 51.8% of relative amount, respectively. The minor component is benzophenone with only 0.28% and 0.14%. Furthermore, undecane, tetradecane, 3-methyl-tridecane, and cyclopentadecane were found only in males. The possible function of volatile compounds of MTG contents in T. papillosa is addressed.

Neonicotinoid-Induced Mortality of Diaphorina Citri (Hemiptera: Liviidae) is Affected by Route of Exposure.

Science.gov (United States)

Langdon, Kevin W; Rogers, Michael E

2017-10-01

The use of neonicotinoids in citrus (Rutaceae) has increased substantially to help manage the Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), a vector of the devastating citrus disease, huanglongbing (HLB). In citrus pest management programs, neonicotinoids are most often applied to the soil as a drench and move through xylem channels from the roots into the foliage. We developed a novel assay to quantify the dose required to kill D. citri following ingestion and compare it with the dose required to kill by contact. The LC50 of the laboratory strain for ingestion of imidacloprid, thiamethoxam, and clothianidin were each approximately 10-fold greater than the respective LC50 by contact exposure. Four field populations were tested to validate comparative exposure of the laboratory strain to imidacloprid and determine the relative susceptibility of field populations to imidacloprid by exposure through ingestion and contact. The contact assay exhibited low (10) RR50 values were observed for the Lake Placid and Lake Alfred populations using the contact and the ingestion method. This research demonstrates that the ingestion assay method described herein is more sensitive in detection of low-level resistance and should be the standard methodology used in monitoring for resistance to systemic insecticides for this global pest. We found D. citri populations with a lower than expected susceptibility to neonicotinoids in the field, which warrants the implementation of resistance management practices to preserve the utility of soil-applied neonicotinoids in citrus. © The Author 2017. Published by Oxford University Press on behalf of Entomological Society of America.

Organizational Studies: A Complement to the Study of Social Management Los estudios organizacionales: un complemento para el estudio de la gestión social

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María Edith Morales Mosquera

2012-12-01

Full Text Available The article presents a reflection resulting from the PhD project “Construction intersubjective social management in the city of Medellin”, on the main aspects that turn the organizational studies into a complement in order to advance in the field of social management, addressed by tradition from the public. The article suggest how these aspects, which have an interdisciplinary perspective and look beyond the organization towards the study of phenomena different cultural, political, economic, social, among others, and whose nature is apparently non organizational, contribute to the conceptualization of social services management public which is not centered on the action of a single organization, but on the whole of the associations belonging to the civil society. In order to account for this, the article explains what is the social management, then discusses some of the main contributions made by the organizational theories, emphasizing aspects that give rise to organizational studies; after that, the article presents the contributions made by the organizational studies to the research in social management; finally, the conclusions are presented.El artículo recoge una reflexión producto del proyecto de tesis doctoral “Construcción intersubjetiva de la gestión social en la ciudad de Medellín” sobre los principales aspectos que hacen de los estudios organizacionales un complemento para avanzar en el campo de la gestión social, la cual ha sido tradicionalmente abordada desde la administración pública. Se plantea cómo éstos, al tener una perspectiva interdisciplinaria y trascender la mirada de la organización hacia el estudio de los fenómenos culturales, políticos, económicos y sociales –de naturaleza aparentemente no organizacional–, contribuyen a la conceptualización de la gestión de servicios sociales públicos, la cual no está centrada en la acción de una sola organización sino en la del conjunto de las

Estudio de inmunogenicidad para dos vacunas recombinantes contra hepatitis B

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O. Juliao

1991-12-01

Full Text Available Este estudio compara la inmunogenicidad (seroconversión, seroprotección e Hiperrespuesta, producida por dos vacunas recombinantes contra la hepatitis B (Engerix-B de Bélgica y Cubana, en dos esquemas (012 y 016 meses, empleando los métodos de cuantificación para Anti-HBsAg (Abbott y Organón, los cuales fueron también comparados. En el estudio participaron 257 voluntarios,  divididos al azar en 4 grupos (dos vacunas, dos esquemas. Resultados: los dos métodos de Abbon y Organon, no presentan diferencias estadísticas significativas. La vacuna cubana muestra una mayor respuesta inmunogénica para dos dosis de vacuna y para el esquema 012. No hay diferencia entre los esquemas 012 y 016 y en el esquema 016 no se ven diferencias estadísticamente significativas con la vacuna Engerix-B. En esta Última el esquema 016 muestra mejores resultados que el 012.

El "estudio de la enseñanza y del aprendizaje": una forma globalizadora de investigación del profesorado

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John Elliott

2010-01-01

Full Text Available En 2007 la Asociación Mundial para el "Estudio de la enseñanza" organizó su congreso inaugural en Hhong Kong en pos del creciente interés internacional en el "Estudio de la enseñanza" en Japón y su transformación en Kong en "Estudio del Aprendizaje". En el centro del "Estudio de la enseñanza" se encuentra el desarrollo colaborativo de una "lección" (considerada una unidad didáctica, unidad de estudio construida en torno a un tema, más que una unidad de tiempo como tal mediante una serie de "sesiones de investigación". Los profesores involucrados en la enseñanza de la misma clase, o unidad didáctica, se observan unos a otros sucesivamente mientras la imparten, poniendo en común sus observaciones entre una clase y la siguiente, como base para tomar decisiones colectivas sobre cambios posteriores en las programaciones de las clases, que se pondrán a prueba posteriormente en la siguiente clase de investigación. En Hong Kong, el "estudio de enseñanza" japonés se fusionó con la teoría fenomenográfica de aprendizaje desarrollada por Marton y sus colaboradores en Suecia. Este enfoque se centra en desarrollar y poner a prueba en las aulas una teoría de aprendizaje conocida como "teoría de la variación". En Suecia, y al principio en Hong Kong, el Estudio del Aprendizaje se consideró una forma de "experimento de diseño", en lugar de una forma de investigación-acción. Aunque los profesores colaboraron con investigadores para poner a prueba la teoría, la responsabilidad principal sobre la recogida y el análisis de datos recaía en los investigadores. No obstante, en el contexto de Hhong Kong, donde a los maestros y a las escuelas se les proporcionaron espacios para desarrollar sus propios programas de estudio dentro de un amplio marco de objetivos y principios, la teoría de la variación llegó a integrarse en el proceso del Estudio de la enseñanza y ayudó a desarrollar las capacidades de los profesores propiciando un

The cicadas (Hemiptera: Cicadidae) of India, Bangladesh, Bhutan, Myanmar, Nepal and Sri Lanka: an annotated provisional catalogue, regional checklist and bibliography.

Science.gov (United States)

Price, Benjamin Wills; Allan, Elizabeth Louise; Marathe, Kiran; Sarkar, Vivek; Simon, Chris; Kunte, Krushnamegh

2016-01-01

The cicadas of the Indian subcontinent, like many other insects in the region, have remained understudied since the early part of the 20th Century, and await modern taxonomic, systematic and phylogenetic treatment. This paper presents an updated systematic catalogue of cicadas (Hemiptera: Cicadidae) from India, Bangladesh, Bhutan, Myanmar, Nepal and Sri Lanka, the first in over a century. This paper treats 281 species, including: India and Bangladesh (189 species), Bhutan (19 species), Myanmar (81 species), Nepal (46 species) and Sri Lanka (22 species). For each species all recognized junior synonyms are included with information on the type material and additional specimens where relevant. The global distributional range and notes on the taxonomy of each species are included where appropriate. Two lists are provided: (1) species known to occur in India and Bangladesh (treated as a geographic unit), Bhutan, Myanmar, Nepal and Sri Lanka; and (2) species previously listed from these countries in error. A bibliography of species descriptions is provided, with the papers containing the original descriptions provided where copyright allows.

Host Range Testing of Diaphorencyrtus aligarhensis (Hymenoptera: Encyrtidae) for Use in Classical Biological Control of Diaphorina citri (Hemiptera: Liviidae) in California.

Science.gov (United States)

Bistline-East, Allison; Pandey, Raju; Kececi, Mehmet; Hoddle, Mark S

2015-06-01

Host range tests for Diaphorencyrtus aligarhensis (Shafee, Alam, & Agarwal) (Hymenoptera: Encyrtidae), an endoparasitoid of Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Liviidae), sourced from Punjab Pakistan, were conducted in quarantine at the University of California, Riverside, CA. Seven nontarget psyllid species representing four psyllid families were exposed to mated D. aligarhensis females in four different treatment types: 1) short sequential no-choice treatments, 2) prolonged sequential no-choice treatments, 3) prolonged no-choice static treatments, and 4) choice treatments. Selection of nontarget psyllid species was based on phylogenetic proximity to D. citri, likelihood of being encountered by D. aligarhensis in the prospective release areas in California, and psyllid species in biological control of invasive weeds. D. aligarhensis exhibited high host affinity to D. citri, and only parasitized one nontarget species, the pestiferous potato psyllid, Bactericera cockerelli (Sulc), at low levels (citri. Results presented here suggest D. aligarhensis poses minimal risk to nontarget psyllid species in California. © The Authors 2015. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

La comprensión y producción del lenguaje figurado en la L2. Estudio de un foro virtual

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Agnese Sampietro

2015-06-01

Full Text Available El estudio del bilingüismo es una de las áreas más dinámicas en la investigación en psicolingüística (Grosjean & Li, 2013. A pesar de la gran cantidad de estudios realizados en esta disciplina, sigue habiendo relativamente poca investigación que analice el procesamiento del lenguaje figurado. Esta misma falta de estudios se encuentra también en la glotodidáctica, puesto que la mayoría de estudios conciernen la enseñanza de idioms en inglés como lengua extranjera (Nation, 2001. Tras una revisión de los principales debates sobre el estudio del procesamiento de expresiones idiomáticas y su comprensión en la L2, el presente trabajo analiza las estrategias empleadas por usuarios de un foro lingüístico virtual en la comprensión y producción de expresiones no literales en castellano e italiano como lenguas extranjeras, valorando especialmente la importancia de la conciencia metalingüística del hablante. Se esbozarán finalmente algunas posibilidades para la aplicación de los resultados del estudio a la enseñanza de lenguas extranjeras.

Características académicas de los alumnos que inician estudios universitarios de ciencias economicas y empresariales

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Guerrero Manzano, M.

2005-01-01

Full Text Available Los docentes universitarios muestran un interés constante porque el alumno alcance los objetivos de conocimiento planeados en su asignatura y finalice con éxito sus estudios. De ahí su empeño manifiesto por mejorar la eficiencia de los procesos de enseñanza-aprendizaje. Sin embargo, se constata en las universidades españolas la presencia de altos porcentajes de abandono de los estudios junto al incremento del tiempo necesario para egresarse. No existe una causa única para explicar estos problemas. En las Facultades de Ciencias Económicas y Empresariales se destacan algunas características típicas del alumnado que concurre a estos estudios. Situaciones peculiares que se concretan en carencias en la formación previa del estudiante, falta de motivación, elección sin vocación de la carrera y baja aptitud hacia el estudio, de una importante proporción de alumnos. Este trabajo analiza las características de los alumnos que han iniciado estudios en carreras de Economía y Empresa desde 1995 hasta 2004, en relación con los ítems detallados, a fin de comprobar si responden a las creencias comunes sobre la cuestión.

Estudio experimental del comportamiento del hormigón confinado sometido a compresión

OpenAIRE

Aire Untiveros, Carlos Máximo

2002-01-01

La tesis presenta los resultados de un extenso estudio experimental de probetas cilíndricas de hormigón sometidas a confinamiento lateral cargadas axialmente. En el estudio se consideró el confinamiento activo y pasivo. El confinamiento activo consistió en aplicar una presión hidrostática en una célula triaxial y el confinamiento pasivo fue mediante tubos de acero rellenos de hormigón y probetas de hormigón zunchadas con polímeros reforzados con fibras (FRP) de carbono y vidrio. Se ensayaron ...

Estudio teórico de formas inusuales y modificadas de los ácidos nucleicos

OpenAIRE

Faustino Pló, Ignacio

2013-01-01

1) Estudio teórico de nucleobases modificadas. Las modificaciones químicas de ácidos nucleicos tienen una amplia variedad de aplicaciones tanto en clínica, utilizadas como agentes antisentido, así como en el estudio de las estructuras de los propios ácidos nucleicos, las interacciones proteína DNA o en la catálisis de ácidos nucleicos por poner algunos ejemplos. Actualmente se sintetizan cientos de análogos de nucleósidos estándar en laboratorios farmacéuticos, algunos de ellos como, ...

Efectos del ejercicio en condiciones de normopeso y obesidad : Estudios en animales y humanos /

OpenAIRE

Cigarroa Cuevas, Igor Iván,

2016-01-01

El objetivo principal de la tesis fue evaluar, en estudios con animales y humanos, el impacto que tiene la práctica de ejercicio físico sobre variables conductuales, metabólicas y nutricionales, considerando diferencias de género en individuos de peso normal o con sobrepeso/obesidad. En los estudios con animales, se usaron ratas macho y hembra adultas de peso normal o con obesidad inducida por dieta (OID). Las ratas fueron entrenadas a una intensidad moderada (12 metros/minutos) y más alta (1...

Las interacciones escolares y los estereotipos de género : dos estudios de caso

OpenAIRE

Flores Sánchez, Norma

2006-01-01

Durante la década de 1990 se introduce en Ecuador estudios orientados a explorar inequidades de género en el campo de la educación. Igualmente se proponen acciones de política para cerrar brechas de género. Los estudios, por lo general, han privilegiado aproximaciones cuantitativas (Reed, 1997; Ponce y Martínez 1990-2004), por lo que resulta importante incorporar una perspectiva cualitativa de las desigualdades de género. En este sentido resulta de interés conocer por ejemplo, al interior de ...

Estudio sobre la construcción autorregulada del portafolio en el grado de Enfermería

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Bernat C. Serdà-Ferrer

Full Text Available Introducción: Este estudio presenta el proceso de implementación del portafolio en el transcurso de cuatro cursos académicos consecutivos (2006-2010. La planificación incluye tres fases (iniciación, desarrollo y consolidación. La muestra es de 480 estudiantes del primer curso de Enfermería de la Universitat de Girona. El objetivo consiste en evaluar la eficacia del instrumento y construirlo de una forma autorregulada. Sujetos y métodos: La propuesta metodológica se basa en la triangulación secuencial entre métodos, en que para el estudio de una misma unidad empírica se combinan dos estrategias de investigación, una cuantitativa y otra cualitativa. Estudio 1: cuantitativo, descriptivo, longitudinal y prospectivo. Para el análisis estadístico de los datos apareados en las variables continuas que siguen una distribución normal, se utiliza el test t de Student. Para el estudio de la correlación entre dos variables numéricas se ha calculado el índice de correlación P de Pearson. Estudio 2: cualitativo, utiliza grupos de discusión a partir de tópicos. Para el análisis de datos textuales se usa el programa informático Atlas.ti. Resultados: La nota final de los estudiantes que elaboran el portafolio (7,78 es superior a la nota de los estudiantes que no lo realizan (7 (p ≤ 0,001. Se identifica una correlación significativa entre la nota portafolio y la nota final (p ≤ 0,001. El estudio de la tendencia muestra una mayor sensibilidad del instrumento en la evaluación. Conclusión: El diseño final del portafolio se caracteriza por ser mixto, flexible y fomenta la reflexión, empoderando al estudiante en el continuo de aprendizaje.

Estudio sobre las variables que intervienen en el abandono físico o negligencia infantil

OpenAIRE

Moreno Manso, Juan Manuel

2002-01-01

La escasez de estudios en materia de abandono físico o negligencia determinan un desconocimiento bastante importante de la tipología de maltrato infantil, considerada hoy por hoy como la de mayor incidencia, tanto a través de estudios nacionales como internacionales. Por ello, a través del análisis de diecinueve variables individuales, sociales, relacionales y familiares, pretendemos aportar un mayor conocimiento sobre una práctica de desprotección infantil con...

Pedro de Luna y el Estudio Salmantino. Aspecto Institucional: su Constitución

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Pilar VALERO GARCÍA

2009-12-01

Full Text Available En un claustro de Diputados del 24 de Septiembre de 1624, presidido por el Vicerrector D. Diego de Ángulo, en ausencia de D. Enrique de Guzmán, rector entonces de la Universidad, se tomaba el acuerdo de nombrar una comisión, cuyo cometido consistía en el estudio y recogida, para darlos a la luz, de toda la serie de estatutos por los que venía gobernándose el Estudio salmantino. De esta recopilación se hicieron cargo el P. Maestro Fr. Antonio de Ledesma y el Señor Doctor Martín López de Hontiveros. Un mes más tarde, aproximadamente, la tarea se daba por concluida y los comisarios la presentaban al claustro, que decidió, de inmediato, proceder a su publicación, encargando de ello a los mismos recopiladores; la impresión definitiva data de Junio de 1625 y está precedida de una introducción, que viene a ser una síntesis de la historia del Estudio desde el punto de vista de las disposiciones y reglamentos.

Análisis y estudio del microcemento

OpenAIRE

PENADÉS SANZ, JONATAN

2015-01-01

[es] El presente Trabajo Final de Grado trata sobre el microcemento, que es un revestimiento continuo multicapa a base de resinas poliméricas, áridos y elementos cementosos. En este trabajo se analizan sus propiedades y su forma de aplicación, también se mencionan algunos consejos a tener en cuenta para su correcto empleo, y se estudian tanto sus ventajas e inconvenientes como sus rendimientos y costes. Además del estudio teórico se desarrolla una aplicación práctica mediante la realización d...

Estudio de un caso de control interno

OpenAIRE

Alfonso Pirela

2005-01-01

El estudio se efectuó con el objetivo de analizar el control interno en el Almacén de la Facultad de ciencias Económicas y Sociales de la Universidad del Zulia. La metodología fue descriptiva. Se utilizó como población a todo el personal del almacén. Los resultados arrojaron que el control del almacén no cuenta con un sistema de control interno integrado que le permita llevar con efectividad las actividades de recepción, almacenamiento y despacho de la mercancía.

Stuart Hall sobre “hacer estudios culturales”

OpenAIRE

Mato, Daniel; Universidad Nacional Tres de Febrero (Untref), Buenos Aires, Argentina

2016-01-01

Traducción de Emeshe Juhász MininbergEmeshe Juhász Mininberg es escritora e investigadora independiente. Doctora en Filosofía y Letras, Yale University, Estados Unidos. Traductora y editora de textos de crítica cultural y de artes plásticas. Ha publicado varios artículos sobre ciudadanía, cultura e identidad nacional en tiempos de globalización, que aparecen, entre otros, en Cultura, política y sociedad: perspectivas latinoamericanas (Clacso, 2005) y en el Diccionario de estudios culturales l...

Estudios sobre metales arqueológicos quemados

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Montero Ruiz, Ignacio; Rovira Llorens, Salvador

2002-01-01

El registro arqueológico nos ofrece materiales metálicos que han sido sometidos a un proceso de quemado ya sea intencional, por su inclusión en ajuares funerarios con el rito de cremación, bien de manera accidental por fuegos o incendios. Se intentan observar e identificar las huellas que este proceso ha podido dejar en materiales metálicos no ferreos: unas veces visualmente reconocibles por la propia deformación del objeto y otras acudiendo a los estudios metalográficos para observar la estr...

Estudio de estabilidad de tabletas de propiltiouracilo 50 mg Study of the 50 mg Propylthiouracil tablets stability

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María Olga Valdés Bendoyro

2010-03-01

Full Text Available Se desarrolló el estudio de estabilidad de las tabletas de propiltiouracilo 50 mg y se determinó su fecha de vencimiento. Este estudio se realizó por los métodos de vida de estante y de estabilidad acelerada mediante cromatografía líquida de alta eficiencia, validados en el Centro de Investigación y Desarrollo de Medicamentos. El estudio de vida de estante se desarrolló por un periodo de 24 meses a temperatura ambiente; mientras que el estudio de estabilidad acelerada se efectuó sometiendo el producto a la influencia de la luz, la humedad y la temperatura; se realizó el análisis durante 3 meses, para los 2 primeros y durante 6 meses para el estudio de la temperatura. La formulación de propiltiouracilo tabletas 50 mg cumplió con las especificaciones de calidad descritas en la farmacopea. Los resultados del estudio de estabilidad por vida de estante después de transcurridos los 24 meses indicaron que el producto mantenía los parámetros que determinan su calidad durante ese tiempo, y en los estudios acelerados no se observó degradación significativa del producto. Se estableció 2 años como fecha de vencimiento en las condiciones señaladas.Autors developed a stability study of 50 mg Propylthiouracil tablets and determination of its expiry date. This study was conducted by fixed life methods and of accelerated stability by high-performance liquid chromatography, validated in Drugs Research and Development Center. Fixed life study was conducted during 24 months at room temperature; whereas the accelerated stability study was conducted exposing the product to light influence, humidity and temperature; during 3 months a analysis was performed for the two first ones and over 6 months in the case of temperature study. Propylthiouracil formula (50 mg tablets fulfilled the quality specifications described in Pharmacopeia. Results of stability study by fixed life after 24 monhts showed that thr product maintain the parameter determining

Estudio de las propiedades mecánicas del sistema óseo (Segunda parte

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Alvaro Mendoza

1998-09-01

Full Text Available Los estudios se hicieron bajo la supervisión del área de Biomecánica. Los ensayos dieron a conocer los valores reales de los esfuerzos mecánicos que es capaz de resistir el tejido óseo. Se elaboraron curvas de esfuerzo-deformación, con la ayuda de deformímetros mecánicos y rosetas de deformación, encontrándose las diferentes propiedades mecánicas y dando una base sólida para estudios posteriores en el área, que ayuden aún más al desarrollo de la bioingeniería en Colombia.

Taxonomic status of the Bemisia tabaci complex (Hemiptera: Aleyrodidae and reassessment of the number of its constituent species.

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Wonhoon Lee

Full Text Available Bemisia tabaci (Hemiptera: Aleyrodidae is one of the most important insect pests in the world. In the present study, the taxonomic status of B. tabaci and the number of species composing the B. tabaci complex were determined based on 1059 COI sequences of B. tabaci and 509 COI sequences of 153 hemipteran species. The genetic divergence within B. tabaci was conspicuously higher (on average, 11.1% than interspecific genetic divergence within the respective genera of the 153 species (on average, 6.5%. This result indicates that B. tabaci is composed of multiple species that may belong to different genera or subfamilies. A phylogenetic tree constructed based on 212 COI sequences without duplications revealed that the B. tabaci complex is composed of a total of 31 putative species, including a new species, JpL. However, genetic divergence within six species (Asia II 1, Asia II 7, Australia, Mediterranean, New World, and Sub Saharan Africa 1 was higher than 3.5%, which has been used as a threshold of species boundaries within the B. tabaci complex. These results suggest that it is necessary to increase the threshold for species boundaries up to 4% to distinguish the constituent species in the B. tabaci complex.

Pengaruh cendawan endofit terhadap biologi dan statistik demografi wereng batang cokelat Nilaparvata lugens Stál (Hemiptera: Delphacidae

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Amanda Mawan

2015-09-01

Full Text Available Endophytic fungi is an endosymbiont that lives within host plant tissues and does not necessary cause any harm to plants. This type of fungus are important as mediators in plant-herbivore interactions. One of the endophytic fungi in rice is Nigrospora sp. The effects of Nigrospora sp. on the biology and demographic statistic of Nilaparvata lugens Stál (Hemiptera: Delphacidae were studied in the laboratory. We used Nigrospora sp. culture powder was used to inoculate the fungi to rice seeds by mixing 10 g of flour endophytic per 1 kg rice seeds. The mixture was then stored in damp and dark storage. Results showed that the rice seeds treated with endophytic fungi showed some resistance to N. lugens. Eggs and early stages of nymph mortality was increased, higher than the control. Endophytic fungi also affect the nymphs growth rates by slowing it down, prolonging N. lugens life cycle, preoviposition period as well as delayed the age at first reproduction. N. lugens population growth is effected by Nigrospora sp. in laboratory scale. Thus, it has the potential as an alternative way to control N. lugens population. In addition, inoculation of endophytic fungi could be a useful method for protecting rice plants from N. lugens.

Assessment of Feeding Acceptance and Injury of Kerman Pistachios, Pistacia vera, by Brown Marmorated Stink Bug (Hemiptera: Pentatomidae).

Science.gov (United States)

Lara, Jesús R; Kamiyama, Matthew T; Hernandez, Gabriel; Nay, Justin; Hoddle, Mark S; Gao, Yulin

2017-09-01

In the United States, California (CA) is the primary commercial producer of pistachio nuts, Pistacia vera L. (Anacardiaceae). The brown marmorated stink bug (BMSB), Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), an invasive and polyphagous insect pest from Asia, has established in urban areas in several pistachio-growing counties in CA. Breeding BMSB populations have not been detected in commercial pistachio acreage. However, the detection of BMSB in Kern and Fresno counties, major Kerman pistachio producing areas in CA, underscored key knowledge gaps on BMSB ecology in CA and motivated investigations on the susceptibility of pistachio nuts to BMSB feeding. Laboratory feeding trials conducted in quarantine under permit indicated that adult BMSB stylets can penetrate developing pistachio shells and associated feeding was correlated with kernel necrosis for nuts collected mid to late season (June to August 2016). Feeding damage estimates indicated that higher levels of kernel injury were associated with female BMSB when compared to feeding by male BMSB. These results suggest that there is probable risk of feeding damage to field grown pistachios from BMSB. The implications of this study for BMSB pest management in the CA pistachio system and future research directions are discussed. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America.

Representaciones sobre el aborto : Estudio de jóvenes de sectores pobres de la ciudad de La Plata (2012)

OpenAIRE

Caneva, Hernán Andrés

2012-01-01

En el presente trabajo se expondrán los avances de un estudio exploratorio de corte cualitativo que estoy realizando con motivo de finalizar mi tesina de grado en la carrera de Lic. Sociología. En dicho estudio me propongo conocer y analizar representaciones acerca del aborto de jóvenes (varones y mujeres) escolarizados de sectores pobres de la ciudad de La Plata durante 2012. La hipótesis de trabajo que orienta el estudio indica que la integración en espacios de socialización tales como l...

Estudio cinético del agotamiento de colorantes reactivos en tricomía en fibras de algodón

OpenAIRE

Parra Osorio, Hernán Julio; Parra Osorio, Hernán Julio

2010-01-01

Este estudio de investigación se desarrolla debido a la necesidad de contar con herramientas para hacer un análisis más eficiente del proceso de agotamiento de colorantes reactivos en la tintura del algodón. Dicho estudio nos llevará a predecir la tendencia en forma cuantitativa del nivel de difusión, absorción y reacción del color, y poder así determinar cuál es su comportamiento cinético durante el proceso de tintura. El estudio es corroborado con simulaciones de tintura experimenta...

Protocolo del estudio: Demanda y práctica farmacéutica en afección bucofaríngea en España. Estudio ACTUA

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Hernández Rex A

2014-12-01

Full Text Available Introducción y justificación: La afección bucofaríngea, y más concretamente el dolor de garganta, por su prevalencia y relación con el uso inadecuado de medicamentos tiene una alta importancia en salud, el farmacéutico contribuye a que el usuario alcance una automedicación adecuada a través de los servicios de atención farmacéutica. Sin embargo, se conoce poco en el ámbito de la farmacia comunitaria sobre los usuarios que demandan esta atención, así como las consultas e intervenciones de los farmacéuticos. Aplicabilidad de los resultados: Conocer las características de la demanda y la práctica farmacéutica en afección bucofaríngea permitirá establecer estrategias sanitarias destinadas a optimizar la asistencia sanitaria. Objetivos: Caracterizar la práctica farmacéutica en afección bucofaríngea realizada en farmacias comunitarias españolas. Material y métodos: Estudio observacional descriptivo transversal. En farmacias comunitarias voluntarias del territorio español. La población de estudio serán los usuarios que acudan a las farmacias por una afección bucofaríngea. La duración del trabajo de campo será de tres meses. Las variables contempladas en el estudio serán aquellas que caracterizan al usuario, a la consulta realizada, y a la intervención del farmacéutico. Se realizará un análisis estadístico descriptivo de los datos (univariante y multivariante por la técnica de correspondencias múltiples. Se garantizará la confidencialidad y el consentimiento informado de los participantes.

Competencias en la educación profesional: una contribución a su estudio

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Elena Anatolievna Zhizhko

2017-07-01

Full Text Available Este artículo presenta los resultados de una invesigación pedagógica cuyo objetivo fue contribuir a la comprensión del enfoque por competencias en la educación profesional a través del estudio documental-bibliográfico de los trabajos teóricos y documentos normativos que sirven de base para la enseñanza por competencias. El estudio realizado mostró que uno de los rasgos principales de la enseñanza por competencias en la educación profesional, es cuidar el aspecto de la continuidad de los estudios, actualización de los profesionistas, su educación continua, apropiación de los nuevos conocimientos, métodos y tecnologías; asimismo, no limitarse sólo a la formación formal, prever otras formas de aprendizaje: el no formal e informal; apoyarse en el autoaprendizaje. Palabras clave: enfoque por competencias; educación profesional; educación continua; aprendizaje formal, no formal e informal; autoaprendizaje.

Funciones ejecutivas y práctica de ajedrez: un estudio en niños escolarizados

OpenAIRE

Ramos, Larisa; Arán Filippetti, Vanessa; Krumm, Gabriela

2018-01-01

Resumen Objetivo: Diversas investigaciones han demostrado los beneficios del ajedrez para el desarrollo cognitivo. Sin embargo, son escasos los estudios que han analizado el efecto del ajedrez en las Fun ciones Ejecutivas (FE) con base en un modelo que evalúe cada uno de los componentes del cons- tructo, el fin del presente estudio fue analizar las diferencias de rendimiento cognitivo en tareas que valoran las FE de memoria de trabajo, inhibición, flexibilidad cognitiva y planificación entre ...

Análisis del actual plan de estudios de la carrera de enfermería

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Cubillos de Donoso Lola

1995-12-01

Full Text Available

El definir el objeto de estudio como el cuidado del ser humano, lleva ha profundos cambios en los planteamientos filosóficos que sustentan el plan de estudio, orientan su conformación y define las características del profesional que tendrá como objetivo de su desempeño profesional el cuidado de un ser humano en los diferentes momentos de su proceso vital humano: la vida, la muerte, la salud o la enfermedad.