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Sample records for calyptocephala gerstaeckeri boheman

  1. Bionomics data and descriptions of the immatures of Calyptocephala gerstaeckeri Boheman (Coleoptera: Chrysomelidae), pest of the oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) (Arecaceae) in Tabasco, Mexico; Datos bionomicos y descripcion de los inmaduros de Calyptocephala gerstaeckeri Boheman (Coleoptera: Chrysomelidae), plaga de la Palma Aceitera (Elaeis guineensis J.) y de la Palma Camedor (Chamaedorea elegans Mart.) (Arecaceae) en Tabasco, Mexico

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    Cordova-Ballona, Leonides [Universidad Popular de la Chontalpa, Tabasco (Mexico); Sanchez-Soto, Saul [Colegio de Postgraduados, Tabasco (Mexico). Campus Tabasco

    2008-11-15

    Characters of the external morphology of egg, larval instars and pupae of Calyptocephala gerstaeckeri Boheman, insect pest of oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) in the State of Tabasco, Mexico, are described and illustrated. Some bionomics data are also presented. The specie was reared in the laboratory on young oil palm plants. (author)

  2. [Bionomics data and descriptions of the immatures of Calyptocephala gerstaeckeri Boheman (Coleoptera: Chrysomelidae), pest of the oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) (Arecaceae) in Tabasco, Mexico].

    Science.gov (United States)

    Córdova-Ballona, Leonides; Sánchez-Soto, Saúl

    2008-01-01

    Characters of the external morphology of egg, larval instars and pupae of Calyptocephala gerstaeckeri Boheman, insect pest of oil palm (Elaeis guineensis J.) and camedor palm (Chamaedorea elegans Mart.) in the State of Tabasco, Mexico, are described and illustrated. Some bionomics data are also presented. The specie was reared in the laboratory on young oil palm plants.

  3. Dimorfismo Sexual de Onchoscelis germari (Boheman (Coleoptera: Curculionidae

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    Marliton Barreto

    2012-12-01

    Abstract. Onchoscelis germari (Boheman is a weevil species associated with Simarouba amara Aubl (Simaroubaceae, commonly named “caixeta”. Sixty three specimens were collected and observed in laboratory for sexual dimorphism differences. The following morphological aspects were observed and illustrated: 1 rostrum of males more rough, coarse and with more dense punctures, tricarinate at the basal 2/3, and covered with erect scales from its base to near middle; rostrum of females smoother, with fine and sparse punctures, only the median longitudinal distinct, and only the base covered by erect scales; 2 males with antenna inserted near the apex of rostrum; and near the middle in females; 3 sternal channel of males flatter, with its lateral margins only indicated or absent in the prosternum; the sternal channel of the females deeper, with its lateral margins more prominent; 4 the eighth abdominal tergite of males visible and distinct; while in the females covered by the seventh abdominal tergite.

  4. Redescriptions of Scirtidae (Coleoptera: Scirtoidea) described by Carl Henrik Boheman (1796-1868) with notes on Scirtes adustus iversenotatus Pic, 1930.

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    Ruta, Rafał; Libonatti, María Laura

    2016-01-29

    Boheman described four species of Scirtidae: one from Sweden (Cyphon pallidulus Boheman, 1850), two from South Africa (Elodes caffer Boheman, 1851 & Elodes marginipennis Boheman, 1851), and one from Argentina (Scirtes adustus Boheman, 1858). Cyphon pallidulus Boheman is a junior synonym of Contacyphon ochraceus (Stephens, 1830). Types of the remaining species were never re-examined, and none of them were redescribed. In the present paper, three species are redescribed on the basis of type specimens deposited in the Swedish Natural History Museum in Stockholm. Genitalia are illustrated for the first time and a new combination is proposed: Brachycyphon marginipennis (Boheman, 1851). The type specimen of a variety described by Pic, S. adustus var. diversenotatus, was examined and revealed to represent a distinct species, which is redescribed under the name of Scirtes diversenotatus Pic, 1930 stat. nov. in the present paper.

  5. Starvation-induced morphological responses of the boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae)

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    Status of the boll weevil, Anthonomus grandis grandis Boheman, as a pest of cotton (Gossypium spp.) in the United States has diminished because of progress by eradication programs. However, this pest remains of critical importance in South America, and intractable populations in extreme South Texas ...

  6. Categorias, níveis e causas de resistência de genótipos de feijoeiro a Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Bruchidae)

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    Eduardo, Wellington Ivo [UNESP

    2014-01-01

    The aim of this work was to select bean genotypes with resistance-related traits against Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Bruchidae) to identify resistance categories, levels and mechanisms. The experiment was carried out at UNESP/FCAV, in the Departamento de Fitossanidade, Laboratório de Resistência de Plantas a Insetos, at 25 ± 1 ºC temperature, 70 ± 10% relative humidity and 12h photophase. Was evaluated antibiosis of bean genotypes to Z. subfasciatus, using completely ra...

  7. Physiologic, morphologic and behavioural responses of Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae) related to the consume of different varieties of Phaseolus vulgaris; Respostas fisiologicas, morfologicas e comportamentais de Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae) associadas ao consumo de diferentes variedades de feijao (Phaseolus vulgaris)

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    Marteleto, Patricia B. [Universidade Federal de Uberlandia (UFU), Umuarama, Uberlandia, MG (Brazil). Inst. de Genetica e Bioquimica. Programa de Pos-Graduacao], e-mail: patriciamarteleto@gmail.com; Lomonaco, Cecilia [Universidade Federal de Uberlandia (UFU), Umuarama, Uberlandia, MG (Brazil). Inst. de Biologia], e-mail: lomonaco@ufu.br; Kerr, Warwick E. [Universidade Federal de Uberlandia (UFU), Umuarama, Uberlandia, MG (Brazil). Dept. de Ciencias Agronomicas], e-mail: kerr@ufu.br

    2009-03-15

    This study was developed aiming to verify physiological, morphological and behavioral responses of two different Zabrotes subfasciatus (Boheman) populations to different beans varieties (Phaseolus vulgaris) (Fabaceae). Female longevity, fertility and oviposition preference site, as well as size and levels of fluctuating asymmetry for males and females were described. Zabrotes subfasciatus displayed physiological plasticity in response to the diet, which was considered an important adaptive ability to maintain the insect generalist habit for food consumption and oviposition sites. The populations studied had different responses to the same treatments, indicating genetic, physiological and behavioral variation on their plastic potential. The Hopkins' principle, which determines the influence of previous female experience in the choice of oviposition sites, was not confirmed. The occurrence of fluctuating asymmetry in males and females was variable, probably as a consequence of genomic factors determining this trait. (author)

  8. No Correlation of Morpho-Agronomic Traits of Phaseolus vulgaris (Fabaceae) Genotypes and Resistance to Acanthoscelides obtectus (Say) and Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae).

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    Guzzo, E C; Vendramim, J D; Chiorato, A F; Lourenção, A L; Carbonell, S A M; Corrêa, O M B

    2015-12-01

    Resistance of common bean (Phaseolus vulgaris) varieties is an important tool to control Acanthoscelides obtectus (Say) and Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae: Bruchinae) worldwide. However, bioassays to characterize the resistance of a genotype can be difficult to perform. Therefore, the current study sought to correlate the morpho-agronomic traits of P. vulgaris genotypes with their resistance to A. obtectus and Z. subfasciatus to facilitate genotype characterization. Bean samples of each genotype were infested with newly emerged insect couples, and the number of adults obtained in each genotype was quantified (value used as a resistance parameter). The resistance index was calculated by dividing the number of adults obtained in each genotype by the one obtained in the cultivar Bolinha, used as the standard for susceptibility. Fifty genotypes were evaluated for A. obtectus and 202 for Z. subfasciatus. All genotypes were characterized according to their resistance to each insect and 18 other morpho-agronomic traits, for a total of 19 descriptors. Principal component analyses did not show any correlation between insect resistance and the morpho-agronomic traits of the genotypes. Further, the thousand seeds weight (TSW), which is indicative of the genotype center of origin was tested considering genotypes from Mesoamerican with low TSW, while those from Andean with high TSW. Thus, the lack of correlation between genotype resistance and TSW indicates that resistance to A. obtectus and Z. subfasciatus in P. vulgaris is not related to the host center of origin.

  9. Evaluación de la toxicidad de proteínas de Bacillus thuringiensis Berliner sobre el picudo del algodonero Anthonomus grandis Boheman

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    Gómez Sylvia

    2006-12-01

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    El picudo del algodonero, Anthonomus grandis Boheman (Coleoptera: Curculionidae, es considerado la principal plaga del cultivo de algodón en Colombia, no sólo por los daños económicos y sociales que causa, sino porque con sus apariciones tempranas altera e interrumpe el desarrollo de los programas de manejo integrado de plagas. La importancia de un manejo inteligente radica en el hecho de que este insecto se  comporta como plaga ‘clave’, con una capacidad de daño en el cultivo entre 50% y 90%, si no se controla. En el presente estudio se estableció una metodología de bioensayo que determinó la actividad tóxica de  proteínas Cry3Aa y Cry1Ia de cepas de B. thuringiensis sobre larvas de primer instar de A. grandis. En los bioensayos se empleó una dieta artificial mezclada con los extractos bacterianos que contenían el complejo espora-cristal de cada cepa. Los resultados indicaron que la cepa de referencia variedad san diego presentó toxicidad sobre larvas de primer instar de A. grandis, en condiciones de laboratorio, con una concentración letal 50 (CL50 de 147,6143 μg de proteína total por mililitro de volumen final de dieta artificial, representando una alternativa potencial para el manejo de este insecto plaga del cultivo de algodón.

  10. Population fluctuation of Sternechus subsignatus Boheman (Coleoptera: Curculionidae at its different development stages associated with soybean crop cycle in Tucumán, Argentina Fluctuación poblacional de Sternechus subsignatus Boheman (Coleoptera: Curculionidae en sus diferentes estados de desarrollo asociados con el ciclo del cultivo de soja en Tucumán, R. Argentina

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    M. Guillermina Socías

    2011-06-01

    Full Text Available Soybean stalk weevil Sternechus subsignatus Boheman 1836 (Coleoptera: Curculionidae population fluctuation was assessed during a three-year period in Northwestern Argentina (NOA. Both population fluctuation of adults, eggs and active larvae on soybean [Glycine max (L Merr] host plants, as well as overwintering forms in soil (larvae, pupae and adults, were recorded. S. subsignatus is a univoltine species, so its life cycle is annual and comprises an active phase, when the pest attacks soybean crops and another dormancy phase, when it remains buried in the soil. Adults were first observed in the crop from late November up to early March. From then onwards, S. subsignatus development stages where it remained associated with the host plant took place at definite times. The eggs appeared on plants from mid-January to the end of March. Larval period lasted from the end of January to the end of April, when larvae jumped onto the ground and buried themselves to spend the winter. Pupae were observed towards the end of September, and adults first appeared as October was drawing to a close. A new cicle began, with adults emerging in late November or early December. Thus, it was observed that S. subsignatus in the NOA region presents a single annual generation.La dinámica poblacional del picudo del tallo de la soja Sternechus subsignatus Boheman 1836 (Coleoptera: Curculionidae fue evaluada durante un periodo de estudio de tres años en el Noroeste Argentino (NOA. Se registró la fluctuación de adultos, huevos y larvas activas en el hospedero soja, además de las formas hibernantes en suelo, larva, pupa y adulto. El ciclo de vida de S. subsignatus es anual y comprende una fase activa, asociada al cultivo de la soja [Glycine max (L Merr], y otra fase de latencia, durante la cual la plaga permanece en el suelo, sin entrar en contacto con el cultivo. Los primeros adultos se observan en campo desde finales de noviembre y hasta los primeros días de marzo. A

  11. Toxicity and repellency of essential oils to Zabrotes subfasciatus (Boheman (Coleoptera, Chrysomelidae, Bruchinae in Phaseolus vulgaris L Toxicidade e repelência de óleos essenciais a Zabrotes subfasciatus (Boheman (Coleoptera, Chrysomelidae, Bruchinae em grãos de Phaseolus vulgaris L

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    Solange Maria de França

    2012-09-01

    Full Text Available The effects of tangerine (Phaseolus vulgaris Blanco, lemon (Citrus medica limonum Lush, pear orange (Citrus sinensis L. Osbeck, red copaiba (Copaifera langsdorffii Desf., rosemary (Baccharis dracunculifolia De Candole, Eucalyptus (Eucalyptus globulus Labillardière and E. citriodora Hook, lemongrass (Cymbopogon citratus Stapf. and citronella (Cimbopogon nardus Linnaeus oils at several concentrations on Zabrotes subfasciatus (Boheman were studied. In toxicity tests, grains of Phaseolus vulgaris L. cv. Rajadinho were impregnated with oils and infested with adults of Z. subfasciatus up to 24 hours old. All tested oils were effective in reducing the viable egg-laying and adult emergence of this pest, in function of the concentrations used, highlighting E. citriodora and E. globulus oils which caused 100% effectiveness from 0.5 mL Kg-1 concentration. In repellency tests, two arenas consisting of plastic containers, connected symmetrically to a central box by two plastic tubes were used. In one of the boxes, untreated beans were placed and on the other ones beans treated with each oil concentration were used. In the central box, five couples of Z. subfasciatus were released. Grains of P. vulgaris treated with oils of E. citriodora, C. citratus and C. oleifera reduced the attraction percentage of Z. subfasciatus adults, while the E. globulus increased this percentage. The percentages of reduced viable eggs ranged from 17.9% (C. medica limonum to 93.3% (C. nardus, while the reduction on the number of emerged insects was 23.9% and 95.9%, respectively for these same oils.Estudaram-se os efeitos dos óleos de tangerina 'Cravo' (Phaseolus vulgaris Blanco, limão-siciliano (Citrus medica limonum Lush, laranja 'Pêra' (Citrus sinensis L. Osbeek, copaíba-vermelha (Copaifera langsdorffii Desf., alecrim-do-campo (Baccharis dracunculifolia De Candole, eucalipto (Eucalyptus globulus Labillardière e Eucalyptus citriodora Hook, capim-santo (Cymbopogon citratus

  12. NON PREFERENTIAL OVIPOSITION OF Zabrotes subfasciatus IN COMMON BEANS (Phaseolus vulgaris L. APPLIED WITH SOME VEGETAL PRODUCTS NÃO-PREFERÊNCIA PARA OVOPOSIÇÃO DE Zabrotes subfasciatus (Boheman, 1833 EM FEIJÃO TRATADO COM DIFERENTES PRODUTOS DE ORIGEM VEGETAL

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    Corival Cândido da Silva

    2007-09-01

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    It was studied the non-preferential oviposition of Zabrotes subfasciatus (Boheman, 1833 in common beans (P. vulgaris L. cv. carioca applied with some vegetal products. The applied products were andiroba oil (Carapa guianensis, neem oil (Azadirachta indica, neem solution and the commercial product Azatin with rates 2, 4 and 6 ml/kg grain. The experimental design was completely randomized in factorial scheme 4 x 4 with 5 replications. Data were transformed in (x + 1^1/2 and variance analysis while averages were evaluated by Tukey test 5%. All products differed in control. Neem solution and Azatin at 4 ml/kg grain, neem oil at 6 ml/kg grain and andiroba oil (2, 4 and 6 ml/kg grain showed better results than other treatments.

    KEY-WORDS: Zabrotes; Phaseolus; Carapa; Azadirachta; resistance.

    Foi estudada a não-preferência para a oviposição de Zabrotes subfasciatus (Boheman,1833 em feijão (Phaseolus vulgaris cultivar carioca, tratado com

  13. Lufenuron impact upon Anthonomus grandis Boheman (Coleoptera: Curculionidae) midgut and its reflection in gametogenesis.

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    Costa, Hilton Nobre; da Cunha, Franklin Magliano; Cruz, Glaucilane Santos; D'assunção, Carolline Guimarães; Rolim, Guilherme Gomes; Barros, Maria Edna Gomes; Breda, Mariana Oliveira; Teixeira, Alvaro Aguiar Coelho; Teixeira, Valéria Wanderley

    2017-04-01

    The insecticide Match® (lufenuron), one of the main insect growth regulators used in pest control, has been presented as a viable alternative against the boll weevil, Anthonomus grandis (Coleoptera: Curculionidae), by inhibiting chitin synthesis. Thus, this study aimed to examine whether Match® interferes in the synthesis of the peritrophic matrix, leading to changes in the midgut epithelium, resulting in nutritional deficiency and reflecting, thereby, in the gametogenesis process of A. grandis. Floral cotton buds were immersed in the insecticide solution (800μL of Match®+200mL of distilled water) and offered to the adult insects. The midguts of the insects were evaluated after 24 and 120h after feeding. The gonads were evaluated after 120h. The results showed that Match®, in both evaluation periods, induced histopathological alterations such as disorganization, vacuolization and desquamation of the midgut epithelium; histochemical modifications in the distribution patterns of carbohydrates, although without quantitative changes; and a strong decrease in protein levels. No apoptosis were observed, however, there was an increase in the number of regenerative cell nests. In the testicles, a reduction in the amount of spermatozoids and reduced carbohydrate levels were observed, but no difference in protein levels. The ovarioles presented structural disorganization of follicular cells, yolk reduction and decrease in protein levels, however, no change in carbohydrates levels was noted. Therefore, it is concluded that Match® performs histopathologic and histochemical alterations in the midgut epithelium and the gonads of A. grandis adults, reflecting in the gametogenesis process, presenting itself as a promising tool in the management of this pest on cotton crops. Copyright © 2016 Elsevier Inc. All rights reserved.

  14. Triatoma gerstaeckeri (Hemiptera: Reduviidae infectada con Trypanosoma cruzi en Nuevo León, México, y capacidad patógena de la cepa regional

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    Zinnia J. Molina-Garza

    2015-09-01

    Conclusiones. La presencia de vectores domiciliarios naturalmente infectados con T. cruzi, es un factor de riesgo importante para la salud pública de la región, considerando que este es el principal mecanismo de la transmisión del parásito y que la cepa NE de T. cruzi tiene una virulencia similar a la de otras cepas mexicanas y texanas, y causó infección chagásica en 11 de los 12 ratones inoculados.

  15. Repelência e atividade inseticida de pós vegetais sobre Zabrotes subfasciatus Boheman em feijão-fava armazenado

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    J.E. Girão Filho

    2014-09-01

    Full Text Available O objetivo desta pesquisa foi avaliar o potencial inseticida de Piper nigrum L. (pimenta do reino, Ruta graveolens L. (arruda, Laurus nobilis L. (louro, Syzygium aromaticum (L. Merr. & L.M.Perry (cravo da índia, Chenopodium ambrosioides L. (mastruz, Piper tuberculatum Jaqc. (pimenta de macaco, Tagetes erecta L. (cravo de defunto, Cymbopogon nardus L. (citronela e Melissa officinalis L. (erva cidreira sobre Z. subfasciatus Boh. através dos testes de confinamento, onde os insetos foram confinados durante cinco dias em um recipiente contendo dez grãos de feijão-fava com 0,3 g do pó da planta a ser testada, e, com chance de escolha por meio de uma arena circular, os insetos tiveram a possibilidade de escolha entre grãos com os pós e a testemunha, grãos sem pó das plantas. Observou-se que houve plantas que atuaram como inseticida, outras que repeliram o inseto e não causaram a morte, e outras, que além de repelir também mataram os insetos quando em contato (cravo da índia e matruz. Concluímos que: P. nigrum, P. tuberculatum, S. aromaticum e C. ambrosioides são tóxicas à Z. subfasciatus causando-lhes a morte, L. nobilis, T. erecta, e C. nardus não apresentaram efeito tóxico sobre Z. subfasciatus, C. ambrosioides, S. aromaticum, e C. nardus são repelentes à Z. subfasciatus; P. nigrum, P. tuberculatum, e T. erecta são neutras, e que M. officinalis não apresentou nenhum efeito sobre Z. subfasciatus em relação aos parâmetros avaliados.

  16. Alternative food sources and over wintering feeding behavior of the boll weevil, Anthonomus grandis boheman (coleoptera: curculionidae) under the tropical conditions of central Brazil

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    Ribeiro, Paulina de A.; Sujii, Edison R.; Pires, Carmen S.S.; Fontes, Eliana M.G. [EMBRAPA Recursos Geneticos e Biotecnologia (CENARGEN), Brasilia, DF (Brazil)], e-mail: paulina723@hotmail.com, e-mail: sujii@cenargen.embrapa.br, e-mail: cpires@cenargen.embrapa.br, e-mail: eliana@cenargen.embrapa.br; Diniz, Ivone R. [Universidade de Brasilia (UnB), DF (Brazil). Dept. de Zoologia], e-mail: irdiniz@unb.br; Medeiros, Maria A. de; Branco, Marina C. [EMBRAPA Hortalicas, Brasilia, DF (Brazil)], e-mail: medeiros@cnph.embrapa.br, e-mail: marina@cnph.embrapa.br; Salgado-Labouriau, Maria L. [Universidade de Brasilia (UnB), DF (Brazil). Dept. de Geologia], e-mail: mlea@unb.br

    2010-01-15

    The boll weevil causes serious damage to the cotton crop in South America. Several studies have been published on this pest, but its phenology and behavior under the tropical conditions prevailing in Brazil are not well-known. In this study the feeding behavior and main food sources of adult boll weevils throughout the year in Central Brazil was investigated. The digestive tract contents of insects captured in pheromone traps in two cotton fields and two areas of native vegetation (gallery forest and cerrado sensu stricto) were analyzed. The insect was captured all through the year only in the cerrado. It fed on pollen of 19 different plant families, on Pteridophyta and fungi spores and algae cysts. Simpson Index test showed that the cerrado provided greater diversity of pollen sources. In the beginning of the cotton cycle, the plant families used for pollen feeding were varied: in cotton area 1, the weevil fed on Poaceae (50%), Malvaceae and Smilacaceae (25% each); in cotton area 2 the pollen sources were Malvaceae (50%), Asteraceae (25%) and Fabaceae and Clusiaceae (25% each); in the cerrado they were Chenopodiaceae (67%) and Scheuchzeriaceae (33%). No weevils were collected in the gallery forest in this period. After cotton was harvested, the family Smilacaceae was predominant among the food plants exploited in all the study areas. These results help to explain the survivorship of adult boll weevil during cotton fallow season in Central Brazil and they are discussed in the context of behavioral adaptations to the prevailing tropical environmental conditions. (author)

  17. Effect of garlic extraction on injury by cowpea, Curculio Chalcodermes aenus Boheman (Coleoptera: Cucurlionidae), and other pests, to cowpea, Vigna unguiculata L. Walp

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    Garlic-based oils and extract formulations have been used as insecticides against various insects on numerous crops, but there are contradictions among findings on the insecticidal or repellent properties of garlic-based products. In a field plot test, the effects of garlic extract on control of th...

  18. Taxonomy of the African army ant Dorylus gribodoi Emery, 1892 (Hymenoptera, Formicidae) - new insights from DNA sequence data and morphology

    DEFF Research Database (Denmark)

    Schöning, Caspar; Gotwald, William H.; Kronauer, Daniel Jan Christoph

    2008-01-01

    Numerous species in the Old World army ant genus Dorylus have been described based on a single sex or caste. Our analysis of mitochondrial cytochrome oxidase II gene sequences of specimens from the same population reveals that D. gribodoi Emery males are conspecific with D. gerstaeckeri Emery wor...

  19. Genetic variation of North American Triatomines (Insecta: Hemiptera: Reduviidae): initial divergence between species and populations of Chagas disease vector.

    Science.gov (United States)

    Espinoza, Bertha; Martínez-Ibarra, Jose Alejandro; Villalobos, Guiehdani; De La Torre, Patricia; Laclette, Juan Pedro; Martínez-Hernández, Fernando

    2013-02-01

    The triatomines vectors of Trypanosoma cruzi are principal factors in acquiring Chagas disease. For this reason, increased knowledge of domestic transmission of T. cruzi and control of its insect vectors is necessary. To contribute to genetic knowledge of North America Triatominae species, we studied genetic variations and conducted phylogenetic analysis of different triatomines species of epidemiologic importance. Our analysis showed high genetic variations between different geographic populations of Triatoma mexicana, Meccus longipennis, M. mazzottii, M. picturatus, and T. dimidiata species, suggested initial divergence, hybridation, or classifications problems. In contrast, T. gerstaeckeri, T. bolivari, and M. pallidipennis populations showed few genetics variations. Analysis using cytochrome B and internal transcribed spacer 2 gene sequences indicated that T. bolivari is closely related to the Rubrofasciata complex and not to T. dimidiata. Triatoma brailovskyi and T. gerstaeckeri showed a close relationship with Dimidiata and Phyllosoma complexes.

  20. A review of the Palaearctic species of Larinus Dejean (Coleoptera: Curculionidae in C. J. Schoenherr collection: nomenclature and lectotype designations

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    Levent Gültekin

    2015-06-01

    Full Text Available The syntypes of 41 species of Larinus Dejean described by L. Gyllenhal and C. H. Boheman, housed at the C. J. Schoenherr collection in the Swedish Museum of Natural History, Stockholm and the Museum of Evolution, Uppsala University, are examined. Lectotypes are designated, a nomenclatural review performed, many previous synonyms confirmed and three new synonyms proposed: Larinus planus (Fabricius, 1792 (= Larinus rusticanus Gyllenhal, 1835 syn. nov.; Larinus carlinae (Olivier, 1807 (= Larinus sulphurifer Boheman, 1843 syn. nov.; Larinus minutus Gyllenhal, 1835 (= Larinus puncticollis Capiomont, 1874 syn. nov.. Colour images for 15 lectotypes are presented.

  1. Temperature influences on diapause induction and survival in the boll weevil (Coleoptera: Curculionidae)

    Science.gov (United States)

    The boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), has been the most important pest of cotton (Gossypium spp.) wherever it occurs. Although eradication programs in the U.S. have reduced the range of this pest, the weevil remains an intractable problem in subtropical Tex...

  2. Effects of Temperature and Adult Diet on Development of Hypertrophied Fat Body in Prediapausing Boll Weevil (Coleoptera Curculionidae)

    Science.gov (United States)

    Terence L. Wagner; Eric J. Villavaso

    1999-01-01

    This study examines the effects of temperature and adult diet on the development of hypertrophied fat bodies in prediapausing adult boll weevils, Anthonomus grandis grandis Boheman. Simulation models derived from this work are used to estimate the minimal ages at which male and female boll weevils exhibit diapause morphology, based on conditions...

  3. The Journal of Food Technology in Africa 1 03 Biology of the African ...

    African Journals Online (AJOL)

    Biology of the African Sweetpotato Weevil Species Cylas Puncticollis (Boheman) and C. Brunneus. (Fabricius) (Coleoptera: Apionidae). N. E. J. Smit and A. Van Huis lntemational Potato Centre (CIP), Uganda Office, P. O. Box 7878, Kampala, Uganda; Department of Entomology, Wageningen. Agricultural University, P. O. ...

  4. Roles of host plants in boll weevil range expansion beyond tropical Mesoamerica

    Science.gov (United States)

    New findings on boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), biology and ecology have had repercussions on the current level of understanding about short- and long-range boll weevil dispersal, and range expansion from its original tropical Mesoamerican habitat. The w...

  5. Three Boll Weevil Diapause Myths in Perspective

    Science.gov (United States)

    The boll weevil, Anthonmus grandis grandis Boheman (Coleoptera: Curculionidae), originated in Mesoamerica but its contemporary distribution extends from the United States Cotton Belt to Argentina, throughout which it is a serious pest of cotton, Gossypium hirsutum L. While research on the boll weev...

  6. Integrated pest management for sweetpotato in Eastern Africa

    NARCIS (Netherlands)

    Smit, N.

    1997-01-01

    Sweetpotato is an important crop in Eastern Africa. Sweetpotato weevils ( Cylas puncticollis Boheman and C. brunneus Fabricius; Coleoptera: Apionidae) cause damage to roots and vines
    throughout the crop's

  7. Influence of sweetpotato rooting characteristics on infestation and ...

    African Journals Online (AJOL)

    (Y=0.0456x + 21.206; R2 = 0.2731) and negatively correlated to damage by Cylas weevils (Y=-0.027x + 29.684, R2=0.1647). A laboratory study demonstrated the effect of temperature on oviposition, survival and developement of Cylas puncticollis (Boheman). The variety 'Tanzania' that was used as the susceptible check ...

  8. Combining parasitoids and plant resistance for the control of the bruchid Acanthoscelides obtectus in stored beans

    NARCIS (Netherlands)

    Schmale, I.; Wäckers, F.L.; Cardona, C.; Dorn, S.

    2003-01-01

    Abstract Acanthoscelides obtectus (Say) and Zabrotes subfasciatus (Boheman) are the main bruchid pests of stored beans in widespread regions of Latin America and Africa. Host-plant resistance based on the protein arcelin is effective in reducing damage caused by Z. subfasciatus, but beans containing

  9. ESPECIES DE DRYOPHTHORINAE (COLEOPTERA: CURCULIONIDAE ASOCIADAS A PLÁTANO Y BANANO (Musaspp. EN COLOMBIA Dryophthorinae Species (Coleoptera: Curculionidae Associted to Platain and Banana crops (Musaspp. in Colombia

    Directory of Open Access Journals (Sweden)

    PAULA A SEPÚLVEDA-CANO

    Full Text Available Se presenta una sinopsis de los escarabajos de la subfamilia Dryophthorinae (Coleoptera: Curculionidae asociados a cultivos de plátano y banano en Colombia. Adicionalmente se ofrecen claves ilustradas para las especies del país. Se registran seis especies asociadas a dichos cultivos: Cosmopolites sordidus (Germar, 1824, Metamasius hemipterus (Linnaeus, 1758, Metamasius hebetatus (Gyllenhal, 1838, Metamasius submaculatus Champion, 1910, Rhyncophorus palmarum (Linnaeus, 1758 y Polytus mellerborgii (Boheman, 1838.This synopsis is about beetle&#’;s subfamily Dryophthorinae (Coleoptera: Curculionidae associated to plantain and banana crops. Additionally keys illustrated for the species of the country are offered. Six species associated to these cultures are registered: Cosmopolites sordidus (Germar, 1824, Metamasius hemipterus (Linnaeus, 1758, Metamasius hebetatus (Gyllenhal, 1838, Metamasius submaculatus Champion, 1910, Rhyncophorus palmarum (Linnaeus, 1758 y Polytus mellerborgii (Boheman, 1838.

  10. NOTES ON THE TAXONOMY OF TWO LITTLE KNOWN TAXA OF CURCULIO LINNAEUS, 1758 (Coleoptera, Curculionidae

    Directory of Open Access Journals (Sweden)

    Roberto Caldara

    2012-04-01

    Full Text Available Two actions preserve taxal nomenclatural stability within Curculionidae in accordance with the Code. Following the provisions of ICZN Article 23.9.1 Curculio pellitus (Boheman, 1843 (formerly Balaninus becomes a nomen protectum and Curculio gulosus Fabricius, 1792 a nomen oblitum; Curculio villosus Fabricius, 1781 becomes a nomen protectum and Curculio cerasorum Fabricius, 1775 a nomen oblitum. Having met the conditions of ICZN Article 74 and Article 75, the lectotypes of Curculio gulosus Fabricius, 1792 and Curculio cerasorum Fabricius, 1775, and the neotype of Curculio villosus Fabricius, 1781 are designated. The following new synonymy is proposed: Curculio pellitus (Boheman, 1843 = Curculio gulosus Fabricius 1792 n. syn. and the synonymy Curculio villosus Fabricius, 1781 = Curculio cerasorum Fabricius, 1775 is confirmed

  11. [Genitalia of three species of Heilipus Germar (Coleoptera: Curculionidae) that damage avocado fruits (Persea americana Mill.) in Mexico and Costa Rica].

    Science.gov (United States)

    Castañeda-Vildózola, Alvaro; Valdez-Carrasco, Jorge; Equihua-Martínez, Armando; González-Hernández, Héctor; Romero-Nápoles, Jesús; Solís-Aguilar, Juan F; Ramírez-Alarcón, Samuel

    2007-01-01

    The male and female genitaliae of three species of the genus Heilipus Germar (H. lauri Boheman, H. pittieri Barber and H. trifasciatus Fabricius) that damage avocado fruits (Persea americana Mill.) in Mexico and Costa Rica are described and illustrated. The aedeagus, spiculum gastrale, styli of 8th sternite are different in each one of the three species studied and can be used for specific identification.

  12. ESPECIES DE DRYOPHTHORINAE (COLEOPTERA: CURCULIONIDAE ASOCIADAS A PLÁTANO Y BANANO (Musa spp. EN COLOMBIA

    Directory of Open Access Journals (Sweden)

    PAULA A. SEPÚLVEDA-CANO

    2009-01-01

    Full Text Available Se presenta una sinopsis de los escarabajos de la subfamilia Dryophthorinae (Coleoptera: Curculionidae asociados a cultivos de plátano y banano en Colombia. Adicionalmente se ofrecen claves ilustradas para las especies del país. Se registran seis especies asociadas a dichos cultivos: Cosmopolites sordidus (Germar, 1824, Metamasius hemipterus (Linnaeus, 1758, Metamasius hebetatus (Gyllenhal, 1838, Metamasius submaculatus Champion, 1910, Rhyncophorus palmarum (Linnaeus, 1758 y Polytus mellerborgii (Boheman, 1838.

  13. Integrated pest management for sweetpotato in Eastern Africa

    OpenAIRE

    Smit, N.

    1997-01-01

    Sweetpotato is an important crop in Eastern Africa. Sweetpotato weevils ( Cylas puncticollis Boheman and C. brunneus Fabricius; Coleoptera: Apionidae) cause damage to roots and vines
    throughout the crop's production area. Other insect pests of sweetpotato are of regional importance. The aim of the research project was to gain insight in the biology and ecology of sweetpotato weevils and, based on this ...

  14. Insecticidal activity of floral, foliar, and root extracts of Tagetes minuta (Asterales: Asteraceae) against adult mexican bean weevils (Coleoptera: Bruchidae)

    Science.gov (United States)

    David K. Weaver; Carl D. Wells; Florence V. Dunkel; Wolfgang Bertsch; Sharlene E. Sing; Shobha Sriharan

    1994-01-01

    Experiments were conducted to determine speed of action and toxicities of extracts of Tagetes minuta L., a source of naturally occurring insecticidal compounds. LC50 values for male and female Mexican bean weevils, Zabrotes subfasciatus (Boheman), were determined for floral, foliar, and root extracts of T. minuta. The 24-h LC50 values ranged from 138 μ g/cm2 for males...

  15. NOTES ON THE TAXONOMY OF TWO LITTLE KNOWN TAXA OF CURCULIO LINNAEUS, 1758 (Coleoptera, Curculionidae)

    OpenAIRE

    Roberto Caldara; Michael Košťál; Alonso-Zarazaga, Miguel A.

    2012-01-01

    Two actions preserve taxal nomenclatural stability within Curculionidae in accordance with the Code. Following the provisions of ICZN Article 23.9.1 Curculio pellitus (Boheman, 1843) (formerly Balaninus) becomes a nomen protectum and Curculio gulosus Fabricius, 1792 a nomen oblitum; Curculio villosus Fabricius, 1781 becomes a nomen protectum and Curculio cerasorum Fabricius, 1775 a nomen oblitum. Having met the conditions of ICZN Article 74 and Article 75, the lectotypes of Curculio gulosus F...

  16. Epidemiology and Molecular Typing of Trypanosoma cruzi in Naturally-Infected Hound Dogs and Associated Triatomine Vectors in Texas, USA.

    Directory of Open Access Journals (Sweden)

    Rachel Curtis-Robles

    2017-01-01

    Full Text Available Trypanosoma cruzi is the etiologic agent of Chagas disease throughout the Americas. Few population-level studies have examined the epidemiology of canine infection and strain types of T. cruzi that infect canines in the USA. We conducted a cross-sectional study of T. cruzi infection in working hound dogs in south central Texas, including analysis of triatomine vectors collected within kennel environments.Paired IFA and Chagas Stat-Pak serological testing showed an overall seroprevalence of 57.6% (n = 85, with significant variation across kennels. Dog age had a marginally significant effect on seropositivity, with one year of age increase associated with a 19.6% increase in odds of being seropositive (odds ratio 95% CI 0.996-1.435; p = 0.055. PCR analyses of blood revealed 17.4% of dogs harbored parasite DNA in their blood, including both seronegative and seropositive dogs. Molecular screening of organs from opportunistically sampled seropositive dogs revealed parasite DNA in heart, uterus, and mammary tissues. Strain-typing showed parasite discrete typing units (DTU TcI and TcIV present in dog samples, including a co-occurrence of both DTUs in two individual dogs. Bloodmeal analysis of Triatoma gerstaeckeri and Triatoma sanguisuga insects collected from the kennels revealed exclusively dog DNA. Vector infection with T. cruzi was 80.6% (n = 36, in which T. gerstaeckeri disproportionately harbored TcI (p = 0.045 and T. sanguisuga disproportionately harbored TcIV (p = 0.029. Tracing infection status across dog litters showed some seropositive offspring of seronegative dams, suggesting infection of pups from local triatomine vectors rather than congenital transmission.Canine kennels are high-risk environments for T. cruzi transmission, in which dogs likely serve as the predominant parasite reservoir. Disease and death of working dogs from Chagas disease is associated with unmeasured yet undoubtedly significant financial consequences because working

  17. Epidemiology and Molecular Typing of Trypanosoma cruzi in Naturally-Infected Hound Dogs and Associated Triatomine Vectors in Texas, USA.

    Science.gov (United States)

    Curtis-Robles, Rachel; Snowden, Karen F; Dominguez, Brandon; Dinges, Lewis; Rodgers, Sandy; Mays, Glennon; Hamer, Sarah A

    2017-01-01

    Trypanosoma cruzi is the etiologic agent of Chagas disease throughout the Americas. Few population-level studies have examined the epidemiology of canine infection and strain types of T. cruzi that infect canines in the USA. We conducted a cross-sectional study of T. cruzi infection in working hound dogs in south central Texas, including analysis of triatomine vectors collected within kennel environments. Paired IFA and Chagas Stat-Pak serological testing showed an overall seroprevalence of 57.6% (n = 85), with significant variation across kennels. Dog age had a marginally significant effect on seropositivity, with one year of age increase associated with a 19.6% increase in odds of being seropositive (odds ratio 95% CI 0.996-1.435; p = 0.055). PCR analyses of blood revealed 17.4% of dogs harbored parasite DNA in their blood, including both seronegative and seropositive dogs. Molecular screening of organs from opportunistically sampled seropositive dogs revealed parasite DNA in heart, uterus, and mammary tissues. Strain-typing showed parasite discrete typing units (DTU) TcI and TcIV present in dog samples, including a co-occurrence of both DTUs in two individual dogs. Bloodmeal analysis of Triatoma gerstaeckeri and Triatoma sanguisuga insects collected from the kennels revealed exclusively dog DNA. Vector infection with T. cruzi was 80.6% (n = 36), in which T. gerstaeckeri disproportionately harbored TcI (p = 0.045) and T. sanguisuga disproportionately harbored TcIV (p = 0.029). Tracing infection status across dog litters showed some seropositive offspring of seronegative dams, suggesting infection of pups from local triatomine vectors rather than congenital transmission. Canine kennels are high-risk environments for T. cruzi transmission, in which dogs likely serve as the predominant parasite reservoir. Disease and death of working dogs from Chagas disease is associated with unmeasured yet undoubtedly significant financial consequences because working dogs are

  18. Projected future distributions of vectors of Trypanosoma cruzi in North America under climate change scenarios.

    Directory of Open Access Journals (Sweden)

    Miroslava Garza

    2014-05-01

    Full Text Available Chagas disease kills approximately 45 thousand people annually and affects 10 million people in Latin America and the southern United States. The parasite that causes the disease, Trypanosoma cruzi, can be transmitted by insects of the family Reduviidae, subfamily Triatominae. Any study that attempts to evaluate risk for Chagas disease must focus on the ecology and biogeography of these vectors. Expected distributional shifts of vector species due to climate change are likely to alter spatial patterns of risk of Chagas disease, presumably through northward expansion of high risk areas in North America.We forecast the future (2050 distributions in North America of Triatoma gerstaeckeri and T. sanguisuga, two of the most common triatomine species and important vectors of Trypanosoma cruzi in the southern United States. Our aim was to analyze how climate change might affect the future shift of Chagas disease in North America using a maximum entropy algorithm to predict changes in suitable habitat based on vector occurrence points and predictive environmental variables. Projections based on three different general circulation models (CCCMA, CSIRO, and HADCM3 and two IPCC scenarios (A2 and B2 were analyzed. Twenty models were developed for each case and evaluated via cross-validation. The final model averages result from all twenty of these models. All models had AUC >0.90, which indicates that the models are robust. Our results predict a potential northern shift in the distribution of T. gerstaeckeri and a northern and southern distributional shift of T. sanguisuga from its current range due to climate change.The results of this study provide baseline information for monitoring the northward shift of potential risk from Chagas disease in the face of climate change.

  19. ON THE TAXONOMY AND NOMENCLATURE OF SOME MECININI (COLEOPTERA, CURCULIONIDAE

    Directory of Open Access Journals (Sweden)

    Roberto Caldara

    2008-04-01

    Full Text Available In accordance with the Code, ten actions are taken to preserve nomenclatural stability of names of taxa currently belonging to Mecinini. Following the provisions of ICZN Article 23.9.1, Cleopomiarus graminis (Gyllenhal, 1813 (formerly Rhynchaenus is made a nomen protectum and Curculio ellipticus Herbst, 1795 is made a nomen oblitum; Rhinusa antirrhini (Paykull, 1800 (formerly Curculio is made a nomen protectum and Curculio noctis herbst, 1795 is made a nomen oblitum; having met the conditions of ICZN article 75.3 the neotypes of the following taxa are designated: Curculio antirrhini Paykull, 1800, Curculio cinctus Rossi, 1790, Curculio curvirostris Rossi, 1790, Curculio linariae Panzer, 1792, Cionus thapsicola Germar, 1821, Mecinus collaris Germar, 1821. Lectotypes of Curculio ellipticus Herbst, 1795, Gymnetron eversmanni Rosenschöld, 1838, Mecinus barbarus Gyllenhal, 1838, and Mecinus longiusculus Boheman, 1845 are also designated. Rhinusa linariae (Panzer, 1792 (formerly Curculio remains the valid name of the taxon since Curculio curvirostris Rossi, 1790 (non Fabricius, 1781 nec Herbst, 1784 is unavailable; Mecinus collaris Germar, 1821 remains the valid name of the taxon since Curculio cinctus Rossi, 1790 (non Drury, 1782 nec Geoffroy, 1785 is unavailable. The following new synonymies are proposed: Mecinus barbarus Gyllenhal, 1838 = Mecinus longiusculus Boheman, 1845 n. syn., = Mecinus teretiusculus Boheman, 1845 n. syn., = Mecinus filiformis Aubé, 1850 n. syn.; Rhinusa florum (Rübsaamen, 1895 = Gymnetron smreczynskii Fremuth, 1972 n. syn.; Rhinusa tetra (Fabricius, 1792 = Cionus thapsicola Germar, 1821 n. syn. Rhinusa eversmanni (Rosenschöld, 1838 is the name proposed for Rhinusa thapsicola sensu auctorum (non Germar, 1821.

  20. Gorgojos (Coleoptera: Curculionidae perjudiciales para "frutos rojos" en la Argentina Weevils (Coleoptera: Curculionidae harmful for berry fruits in Argentina

    Directory of Open Access Journals (Sweden)

    M. Guadalupe Del Rio

    2010-06-01

    Full Text Available Se registraron seis especies de gorgojos de rostro corto de la subfamilia Entiminae que causan daños en cultivos de frutos rojos, en la Argentina. Tres de ellas son exóticas y se distribuyen a lo largo de los bosques patagónicos: Otiorhynchus ovatus (Linnaeus, O. rugosostriatus (Goeze y O. sulcatus (Fabricius(Otiorhynchini; otras tres son nativas y habitan en la zona norte y central del país: Hyphantus sulcifrons Boheman (Anypotactini, Naupactusxanthographus (Germary N. cervinus Boheman (Naupactini. Las larvas viven en el suelo y se alimentan de la superficie externa de las raíces de sus plantas hospedadoras, causan daños más importantes que los adultos, los cuales se alimentan principalmente sobre el follaje. Los principales objetivos de esta contribución son: aportar una clave, diagnosis y fotografías de los hábitos de las seis especies para facilitar su correcta determinación; brindar datos sobre su distribución, plantas hospedadoras y biología, y citar la especie O. ovatus por primera vez para la Argentina, asociada con cultivos de arándano y frutilla.Six species of broad nosed weevils of the subfamily Entiminae are recorded as harmful for berries in Argentina. Three of them are exotic and distributed along the Patagonian forests: Otiorhynchus ovatus (Linnaeus, O. rugosostriatus (Goeze and O. sulcatus (Fabricius(Otiorhynchini and three are native and range in the northern and central areas of this country: Hyphantus sulcifrons Boheman (Anypotactini, Naupactusxanthographus (Germarand N. cervinus Boheman (Naupactini. Larvae live in soil and bore externally on the roots of their host plants, causing more damage than adults that usually feed on the leaves. The main objectives of this contribution are: to give a dichotomous key, diagnoses and habitus photographs for the identification of the six species; to provide information on their geographic distributions, host plants and biology; and to bring the first record of O. ovatus for

  1. [Biological characteristics of the egg phase of citrus root weevils].

    Science.gov (United States)

    Guedes, Jerson V C; Parra, José R P

    2007-01-01

    The goal of this work was to study some characteristics of the egg phase of three species of citrus root weevils. The insects were collected from citrus plants in Itapetininga, SP, and brought to the Laboratório de Biologia de Insetos of ESALQ/USP, in Piracicaba, SP, where the species Naupactus cervinus (Boheman), Naupactus versatilis (Hustache) and Parapantomorus fluctuosus (Boheman) were kept. Duration and viability of the egg phase were evaluated, and the lower temperature threshold and thermal constant (K) were calculated for these species. The species of citrus root weevils showed different duration of egg phases. The egg phase ranged from 40.4 to 13.8 N. cervinus, from 38.7 to 20.0 days for N. versatilis, and from 35.0 to 13.8 days for P. fluctuosus, depending upon temperature. The temperature thresholds of this stage were 8.1, 8.3, and 9.9 masculineC at thermal constant was 385.7, 397.7 and 294.1 degree-days, for N. cervinus, N. versatilis and P. fluctuosus respectively. The duration of the egg phases of N. cervinus and N. versatilis were similar at the same temperatures and P. fluctuosus had a faster development than Naupactus spp. in all temperatures tested.

  2. ESPECIES DE DRYOPHTHORINAE (COLEOPTERA: CURCULIONIDAE ASOCIADAS A PLÁTANO Y BANANO (Musa spp. EN COLOMBIA

    Directory of Open Access Journals (Sweden)

    SEPULVEDA-CANO PAULA

    2009-08-01

    Full Text Available RESUMEN

    Se presenta una sinopsis de los escarabajos de la subfamilia Dryophthorinae (Coleoptera: Curculionidae asociados a cultivos de plátano y banano en Colombia. Adicionalmente se ofrecen claves ilustradas para las especies del país. Se registran seis especies asociadas a dichos cultivos: Cosmopolites sordidus (Germar, 1824, Metamasius hemipterus (Linnaeus, 1758, Metamasius hebetatus (Gyllenhal, 1838, Metamasius submaculatus Champion, 1910, Rhyncophorus palmarum (Linnaeus, 1758 y Polytus mellerborgii (Boheman, 1838.

    Palabras clave: picudos, plátano, banano, Polytus, Colombia.

    ABSTRACT

    This synopsis is about beetle’s subfamily Dryophthorinae (Coleoptera: Curculionidae associated to plantain and banana crops. Additionally keys illustrated for the species of the country are offered. Six species associated to these cultures are registered: Cosmopolites sordidus (Germar, 1824, Metamasius hemipterus (Linnaeus, 1758, Metamasius hebetatus (Gyllenhal, 1838, Metamasius submaculatus Champion, 1910, Rhyncophorus palmarum (Linnaeus, 1758 y Polytus mellerborgii (Boheman, 1838.

    Key words: weevils, plantain, banana, Polytus, Colombia.

  3. New Curculionoidea records from New Brunswick, Canada with an addition to the fauna of Nova Scotia.

    Science.gov (United States)

    Webster, Reginald P; Anderson, Robert S; Webster, Vincent L; Alderson, Chantelle A; Hughes, Cory C; Sweeney, Jon D

    2016-01-01

    This paper presents 27 new records of Curculionoidea for the province of New Brunswick, Canada, including three species new to Canada, and 12 adventive species, as follows: Eusphryrus walshii LeConte, Choragus harrisii LeConte (newly recorded for Canada), Choragus zimmermanni LeConte (newly recorded for Canada) (Anthribidae); Cimberis pallipennis (Blatchley) (Nemonychidae); Nanophyes marmoratus marmoratus (Goeze) (Brentidae); Procas lecontei Bedel (Brachyceridae); Anthonomus pusillus LeConte (newly recorded for Canada), Anthonomus (Cnemocyllus) pictus Blatchley, Archarius salicivorus (Paykull), Dorytomus hirtus LeConte, Ellescus bipunctatus (Linnaeus), Mecinus janthinus (Germar), Myrmex chevrolatii (Horn), Madarellus undulatus (Say), Microplontus campestris (Gyllenhal), Pelenomus waltoni (Boheman), Rhinoncus bruchoides (Herbst), Rhinoncus perpendicularis (Reich), Cossonus impressifrons Boheman, Cossonus pacificus Van Dyke, Rhyncolus knowltoni (Thatcher), Eubulus bisignatus (Say), Polydrusus cervinus (Linnaeus), Magdalis piceae Buchanan, Procryphalus mucronatus (LeConte), Ips grandicollis (Eichhoff), and Xyleborinus attenuatus (Blandford). Recent name changes in the genus Rhinoncus are applied to species known from New Brunswick. In addition, Orchestes alni (Linnaeus) is newly recorded from Nova Scotia.

  4. On the true identity of Curculio pericarpius Linnaeus, 1758 (Coleoptera: Curculionidae

    Directory of Open Access Journals (Sweden)

    Junhao Huang

    2014-10-01

    Full Text Available Basing on the study of the type specimen of Curculio pericarpius Linnaeus, 1758 preserved in the Linnean Collection in London, and here designated as the lectotype, it was found that this name was misapplied to another close species of the genus Rhinoncus Schoenherr, 1825 starting from the Paykull 1792 misidentification. As a consequence, the following new synonymies are established: Rhinoncus pericarpius (Linnaeus, 1758 [= Curculio castor Fabricius, 1792, syn. n.; = Curculio interstitialis Reich, 1787, syn. n.; = Curculio scabratus Fabricius, 1792, syn. n.; = Curculio fruticulosus Herbst, 1795, syn. n.; = Curculio interstitialis Reich, 1797, syn. n.; = Rhynchaenus seniculus Gravenhorst, 1807, syn. n.; = Campylirhynchus quadricornis (Gyllenhal, 1813 sensu Dejean, 1821: 85 [misidentification] not Rhynchaenus quadricornis Gyllenhal, 1813, syn. n.; = Rhinoncus flavipes Stephens, 1831, syn. n.; = Rhinoncus rufipes Stephens, 1831, syn. n.; = Rhinoncus granulipennis Gyllenhal, 1837, syn. n.; = Rhinoncus pyrrhopus Boheman, 1845 sensu Hatch & Kincaid,1958: 20 [misidentification] not Rhinoncus pyrrhopus Boheman, 1845, syn. n.]; and Rhinoncus leucostigma (Marsham, 1802 [ = Curculio pericarpius Linnaeus, 1758 sensu Paykull, 1792 [misidentification] not Curculio pericarpius Linnaeus, 1758, syn. n.; = Cryptorhis herbstii Billberg, 1820: 43 [replacement name for Curculio pericarpius Linnaeus sensu Paykull, 1792], syn. n.; = Rhinoncus spartii Stephens, 1831, syn. n.; = Rhinoncus sanguinipes Reitter, 1916, syn. n.; = Rhinoncus pericarpius ssp. montanus Hoffmann, 1960, syn. n.]. Lectotypes are designated for Curculio pericarpius Linnaeus, 1758 and Curculio leucostigma Marsham, 1802. A neotype is selected for Curculio interstitialis Reich, 1797.

  5. Epidemiology and Molecular Typing of Trypanosoma cruzi in Naturally-Infected Hound Dogs and Associated Triatomine Vectors in Texas, USA

    Science.gov (United States)

    Curtis-Robles, Rachel; Snowden, Karen F.; Dominguez, Brandon; Dinges, Lewis; Rodgers, Sandy; Mays, Glennon

    2017-01-01

    Background Trypanosoma cruzi is the etiologic agent of Chagas disease throughout the Americas. Few population-level studies have examined the epidemiology of canine infection and strain types of T. cruzi that infect canines in the USA. We conducted a cross-sectional study of T. cruzi infection in working hound dogs in south central Texas, including analysis of triatomine vectors collected within kennel environments. Methodology/Principle Findings Paired IFA and Chagas Stat-Pak serological testing showed an overall seroprevalence of 57.6% (n = 85), with significant variation across kennels. Dog age had a marginally significant effect on seropositivity, with one year of age increase associated with a 19.6% increase in odds of being seropositive (odds ratio 95% CI 0.996–1.435; p = 0.055). PCR analyses of blood revealed 17.4% of dogs harbored parasite DNA in their blood, including both seronegative and seropositive dogs. Molecular screening of organs from opportunistically sampled seropositive dogs revealed parasite DNA in heart, uterus, and mammary tissues. Strain-typing showed parasite discrete typing units (DTU) TcI and TcIV present in dog samples, including a co-occurrence of both DTUs in two individual dogs. Bloodmeal analysis of Triatoma gerstaeckeri and Triatoma sanguisuga insects collected from the kennels revealed exclusively dog DNA. Vector infection with T. cruzi was 80.6% (n = 36), in which T. gerstaeckeri disproportionately harbored TcI (p = 0.045) and T. sanguisuga disproportionately harbored TcIV (p = 0.029). Tracing infection status across dog litters showed some seropositive offspring of seronegative dams, suggesting infection of pups from local triatomine vectors rather than congenital transmission. Conclusions/Significance Canine kennels are high-risk environments for T. cruzi transmission, in which dogs likely serve as the predominant parasite reservoir. Disease and death of working dogs from Chagas disease is associated with unmeasured yet

  6. Chaves para a identificação dos principais Coleoptera (Insecta associados com produtos armazenados Keys for the identification of Coleoptera (Insecta associated with stored products

    Directory of Open Access Journals (Sweden)

    Paulo Roberto Valle da Silva Pereira

    2001-03-01

    Full Text Available An illustrated key to identify nine families of Coleoptera commonly found in stored products is presented. Keys for the identification of Anobiidae [Lasioderma serricorne (Fabricius, 1792, Stegobium paniceum (Linnaeus, 1761], Bruchidae [Acanthoscelides obtectus (Say, 1831, Zabrotes subfasciatus (Boheman, 1833], Curculionidae [Sitophilus oryzae (Linnaeus, 1763, S. zeamais Motschulsky, 1885], Silvanidae [Ahasverus advena (Waltl, 1832, Cathartus quadricollis (Guérin, 1892, Oryzaephilus mercator (Fauvel, 1889, O. surinamensis (Linnaeus, 1758] and Tenebrionidae [Gnathocerus cornutus (Fabricius, 1798, Tribolium castaneum (Herbst, 1797, T. confusum du Val, 1868] are also provided. These keys cover the most frequent Coleoptera found in stored products, specially grains, and are to the adult stage only. Illustrations of external morphology and general characteristics are provided for each species reported.

  7. Immature stages of giants: morphology and growth characteristics of Goliathus Lamarck, 1801 larvae indicate a predatory way of life (Coleoptera, Scarabaeidae, Cetoniinae

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    Tomáš Vendl

    2016-09-01

    Full Text Available The third larval instar of Goliathus goliatus (Drury, 1770, G. orientalis Moser, 1909 and G. albosignatus Boheman, 1857 are described and illustrated for the first time and compared with the immature stages of other Cetoniinae. Larval development of G. goliatus is investigated under laboratory conditions, with particular emphasis on food requirements. These results support the obligatory requirement of proteins in the larval diet. The association between larval morphological traits (e. g., the shape of the mandibles and pretarsus, presence of well-developed stemmata and larval biology is discussed. Based on observations and the data from captive breeds it is concluded that a possible shift from pure saprophagy to an obligatory predaceous way of larval life occurred within the larvae of this genus, which may explain why these beetles achieve such an enormous size.

  8. Karyotypes, B-chromosomes and meiotic abnormalities in 13 populations of Alebra albostriella and A. wahlbergi (Hemiptera, Auchenorrhyncha, Cicadellidae from Greece

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    Valentina Kuznetsova

    2013-11-01

    Full Text Available In this work 13 populations of the leafhopper species Alebra albostriella (Fallén, 1826 (6 populations and A. wahlbergi (Boheman, 1845 (7 populations (Cicadellidae: Typhlocybinae from Greece were studied cytogenetically. We examined chromosomal complements and meiosis in 41 males of A. albostriella sampled from Castanea sativa, Fagus sylvatica and Quercus cerris and in 21 males of A. wahlbergi sampled from C. sativa, Acer opalus and Ulmus sp. The species were shown to share 2n = 22 + X(0 and male meiosis of the chiasmate preductional type typical for Auchenorrhyncha. In all populations of A. albostriella and in all but two populations of A. wahlbergi B chromosomes and/or different meiotic abnormalities including the end-to-end non-homologous chromosomal associations, translocation chains, univalents, anaphasic laggards besides aberrant sperms were encountered. This study represents the first chromosomal record for the genus Alebra and one of the few population-cytogenetic studies in the Auchenorrhyncha.

  9. A revision of thirteen species of Triatominae (Hemiptera: Reduviidae vectors of Chagas disease in Mexico

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    Salazar-Schettino Paz Maria

    2010-10-01

    Full Text Available Vectors of Trypanosoma cruzi, parasite responsible for Chagas disease, are divided in intradomestic, peridomestic and sylvatic. The intradomestic are Triatoma barberi and Triatoma dimidiata, two species that represent the highest health risk among the Mexican population. Triatoma dimidiata is a species found mainly inside human habitats, but in Yucatan, it corresponds to the peridomicile vectors. Also in the peridomicile most of Chagas disease vectors are found: Meccus bassolsae, M. longipennis, M. mazzottii, M pallidipennis, M. phyllosomus, M picturata, Triatoma gerstaeckeri, T mexicana, T rubida, Dipetalogaster máxima (the last two are in the process of becoming adapted to the domicile, Panstrongylus rufotuberculatus which occasionally enters the domicile in its adult stage, and Rhodnius prolixus, which is practically controlled in the country. Peridomestic vectors are of lower risk in the transmission dynamics, as compared to the intradomestic ones. For the control of the intradomestic vectors, health education programs, improvements of housing, and the use of pesticides are essential To control the peridomestic vectors, health education programs are required, as well as the use of mosquito nets on doors and windows and around beds, aside from cementing the stone wall fences.

  10. Trypanosoma cruzi (Agent of Chagas Disease) in Sympatric Human and Dog Populations in "Colonias" of the Lower Rio Grande Valley of Texas.

    Science.gov (United States)

    Curtis-Robles, Rachel; Zecca, Italo B; Roman-Cruz, Valery; Carbajal, Ester S; Auckland, Lisa D; Flores, Isidore; Millard, Ann V; Hamer, Sarah A

    2017-04-01

    AbstractThe zoonotic, vector-borne parasite Trypanosoma cruzi causes Chagas disease throughout the Americas, but human and veterinary health burdens in the United States are unknown. We conducted a cross-sectional prevalence study in indigent, medically underserved human and cohabiting canine populations of seven south Texas border communities, known as colonias. Defining positivity as those samples that were positive on two or more independent tests, we found 1.3% seroprevalence in 233 humans, including one child born in the United States with only short-duration travel to Mexico. Additionally, a single child with no travel outside south Texas was positive on only a single test. Among 209 dogs, seroprevalence was 19.6%, but adjusted to 31.6% when including those dogs positive on only one test and extrapolating potential false negatives. Parasite DNA was detected in five dogs, indicating potential parasitemia. Seropositive dogs lived in all sampled colonias with no difference in odds of positivity across age, sex, or breed. Colonia residents collected two adult Triatoma gerstaeckeri and one nymph triatomine from around their homes; one of three bugs was infected with T. cruzi, and blood meal hosts were molecularly determined to include dog, human, and raccoon. Dogs and the infected vector all harbored T. cruzi discrete typing unit I, which has previously been implicated in human disease in the United States. Colonias harbor active T. cruzi transmission cycles and should be a priority in outreach and vector control initiatives.

  11. Systematics of the Holarctic species of the weevil genus Cleopomiarus Pierce (Coleoptera: Curculionidae

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    Roberto Caldara

    2016-03-01

    Full Text Available The Holarctic species of Cleopomiarus Pierce, 1919 (Curculionidae, Curculioninae, Mecinini are revised. Two North American and 19 Palaearctic species are recognized as valid. Three of the latter are new to science: C. afghanus sp. nov. (Afghanistan, C. caucasicus sp. nov. (Armenia, and C. reitteri sp. nov. (Algeria, Morocco. Cleopomiarus ruscinonensis (Roudier & Tempère, 1966, described as subspecies of C. longirostris Gyllenhal, 1838, is raised to species (stat. nov.. The following new synonymies are proposed: Cleopomiarus distinctus (Boheman, 1845 (= Miarus dictamnophilus Zherichin, 1996 syn. nov.; Cleopomiarus flavoscutellatus (Morimoto, 1959 (= Miarus tapirus Korotyaev, 1999 syn. nov.; Cleopomiarus graminis (Gyllenhal, 1813 (= Miarus dulcinasutus Kangas, 1976 syn. nov.; = Miarus jakowlewi Faust, 1895 syn. nov.; = Miarus scutellaris subsp. mequignoni Hoffmann, 1939 syn. nov.. Miarus hispidulus Reitter, 1907 and M. hispidus Bovie, 1909 are again placed in synonymy with Cleopomiarus hispidulus (LeConte, 1876. The lectotypes of the following taxa are designated: Cionus micros Germar, 1824, Cionus plantarum Germar, 1824, Gymnetron distinctus Boheman, 1845, Gymnetron longirostris Gyllenhal, 1838, Miaromimus schatzmayri Solari, 1947, Miarus degorsi Abeille de Perrin, 1906, Miarus fuscopubens Reitter, 1907, Miarus graminis var. subfulvus Reitter, 1907, Miarus graminis var. subuniseriatus Reitter, 1907, Miarus hispidulus Reitter, 1907, Miarus jakowlewi Faust, 1895, Miarus longirostris ssp. mandschuricus Voss, 1952, Miarus medius Desbrochers des Loges, 1893, Miarus vestitus Roelofs, 1875. A key to the species, diagnoses of species groups, descriptions or redescriptions, notes on type specimens, synonymies, comparative notes, distribution, bionomics when available, phylogenenetic observations, and drawings of body, rostra, terminalia and other useful characters for taxonomy are provided.

  12. Estirpes de Bacillus thuringiensis efetivas contra insetos das ordens Lepidoptera, Coleoptera e Diptera Bacillus thuringiensis strains effective against insects of Lepidoptera, Coleoptera and Diptera orders

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    Lílian Botelho Praça

    2004-01-01

    Full Text Available O objetivo deste trabalho foi selecionar entre 300 estirpes de Bacillus thuringiensis as efetivas simultaneamente contra larvas de Spodoptera frugiperda J.E. Smith e Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae, Anthonomus grandis Boheman (Coleoptera: Curculionidae, Aedes aegypti Linnaeus e Culex quinquefasciatus Say (Diptera: Culicidae. Foram selecionadas duas estirpes de B. thuringiensis, denominadas S234 e S997, que apresentaram atividade contra as três ordens de insetos. As estirpes foram caracterizadas por métodos morfológicos, bioquímicos e moleculares. As mesmas apresentaram duas proteínas principais de 130 e 65 kDa, produtos de reação em cadeia da polimerase de tamanho esperado para a detecção dos genes cry1Aa, cry1Ab, cry1Ac, cry1B e cry2 e cristais bipiramidais, cubóides e esféricos.The aim of this work was to select among 300 strains of Bacillus thuringiensis those which are simultaneously effective against larvae of Spodoptera frugiperda J.E. Smith and Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae, Anthonomus grandis Boheman (Coleoptera: Curculionidae, Aedes aegypti Linnaeus and Culex quinquefasciatus Say (Diptera: Culicidae. Two strains of B. thuringiensis were selected, S234 and S997, which presented activity against those three insect orders. Both strains were characterized by morphological, biochemical and molecular methods. They have presented two main proteins with 130 and 65 kDa, polimerase chain reaction products with expected sizes for detection of the genes cry1Aa, cry1Ab, cry1Ac, cry1B and cry2 and bipiramidal, cubical and spherical crystals.

  13. Estimating Contact Process Saturation in Sylvatic Transmission of Trypanosoma cruzi in the United States

    Science.gov (United States)

    Kribs-Zaleta, Christopher

    2010-01-01

    Although it has been known for nearly a century that strains of Trypanosoma cruzi, the etiological agent for Chagas' disease, are enzootic in the southern U.S., much remains unknown about the dynamics of its transmission in the sylvatic cycles that maintain it, including the relative importance of different transmission routes. Mathematical models can fill in gaps where field and lab data are difficult to collect, but they need as inputs the values of certain key demographic and epidemiological quantities which parametrize the models. In particular, they determine whether saturation occurs in the contact processes that communicate the infection between the two populations. Concentrating on raccoons, opossums, and woodrats as hosts in Texas and the southeastern U.S., and the vectors Triatoma sanguisuga and Triatoma gerstaeckeri, we use an exhaustive literature review to derive estimates for fundamental parameters, and use simple mathematical models to illustrate a method for estimating infection rates indirectly based on prevalence data. Results are used to draw conclusions about saturation and which population density drives each of the two contact-based infection processes (stercorarian/bloodborne and oral). Analysis suggests that the vector feeding process associated with stercorarian transmission to hosts and bloodborne transmission to vectors is limited by the population density of vectors when dealing with woodrats, but by that of hosts when dealing with raccoons and opossums, while the predation of hosts on vectors which drives oral transmission to hosts is limited by the population density of hosts. Confidence in these conclusions is limited by a severe paucity of data underlying associated parameter estimates, but the approaches developed here can also be applied to the study of other vector-borne infections. PMID:20436914

  14. Trypanosoma cruzi I genotypes in different geographic regions and transmission cycles based on a microsatellite motif of the intergenic spacer of spliced leader genes✯

    Science.gov (United States)

    Cura, Carolina I.; Mejía-Jaramillo, Ana M.; Duffy, Tomás; Burgos, Juan M.; Rodriguero, Marcela; Cardinal, Marta V.; Kjos, Sonia; Gurgel-Gonçalves, Rodrigo; Blanchet, Denis; De Pablos, Luis M.; Tomasini, Nicolás; Silva, Alex Da; Russomando, Graciela; Cuba Cuba, Cesar A.; Aznar, Christine; Abate, Teresa; Levin, Mariano J.; Osuna, Antonio; Gürtler, Ricardo E.; Diosque, Patricio; Solari, Aldo; Triana-Chávez, Omar; Schijman, Alejandro G.

    2011-01-01

    The intergenic region of spliced-leader (SL-IR) genes from 105 Trypanosoma cruzi I (Tc I) infected biological samples, culture isolates and stocks from 11 endemic countries, from Argentina to the USA were characterised, allowing identification of 76 genotypes with 54 polymorphic sites from 123 aligned sequences. On the basis of the microsatellite motif proposed by Herrera et al. (2007) to define four haplotypes in Colombia, we could classify these genotypes into four distinct Tc I SL-IR groups, three corresponding to the former haplotypes Ia (11 genotypes), Ib (11 genotypes) and Id (35 genotypes); and one novel group, Ie (19 genotypes). Genotypes harboring the Tc Ic motif were not detected in our study. Tc Ia was associated with domestic cycles in southern and northern South America and sylvatic cycles in Central and North America. Tc Ib was found in all transmission cycles from Colombia. Tc Id was identified in all transmission cycles from Argentina and Colombia, including Chagas cardiomyopathy patients, sylvatic Brazilian samples and human cases from French Guiana, Panama and Venezuela. Tc Ie gathered five samples from domestic Triatoma infestans from northern Argentina, nine samples from wild Mepraia spinolai and Mepraia gajardoi and two chagasic patients from Chile and one from a Bolivian patient with chagasic reactivation. Mixed infections by Tc Ia + Tc Id, Tc Ia + Tc Ie and Tc Id + Tc Ie were detected in vector faeces and isolates from human and vector samples. In addition, Tc Ia and Tc Id were identified in different tissues from a heart transplanted Chagas cardiomyopathy patient with reactivation, denoting histotropism. Trypanosoma cruzi I SL-IR genotypes from parasites infecting Triatoma gerstaeckeri and Didelphis virginiana from USA, T. infestans from Paraguay, Rhodnius nasutus and Rhodnius neglectus from Brazil and M. spinolai and M. gajardoi from Chile are to our knowledge described for the first time. PMID:20670628

  15. A genitália externa dos machos de sete espécies de Triatoma Laporte, 1832 da região Neártica (Hemiptera, Reduviidae, Triatominae Male external genitalia in seven species of Triatoma Laporte, 1832 from neartic region (Hemiptera, Reduviidae, Triatominae

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    Herman Lent

    1987-06-01

    Full Text Available Sete espécies da região neártica: Triatoma barberi Usinger, 1939; T. rubida (Uhler, 1894; T. gertaeckeri (Stal, 1859; T. lecticularia (Stal, 1859; T. protracta (Uhler, 1894; T. recurva (Stal, 1868 e T. sanguisuga (Leconte, 1855 foram analisadas comparativamente, tendo como enfoque as estruturas da genitália do macho: falosoma (Ph, suporte do falosoma (SPh, processo do endosoma (PrEn, vesica (V e aparelho articular (Apb. As estruturas fálicas se mostraram capazes de serem usadas como critério morfológico suplementar aos padrões atualmente usados, em taxonomia. Estas espécies silvestres são encontradas nos Estados Unidos e México, naturalmente infectadas pelo T. cruzi; algumas vivem no perdomicílio e outras eventualmente no domicílio, sem contudo colonizá-lo.Seven species from the neartic region, Triatoma barberi Usinger, 1939; T. rubida (Uhler, 1894; T. gerstaeckeri (Stal, 1859; T. lecticularia (Stal, 1859; T. protracta (Uhler, 1894; T. recurva (Stal, 1868 and T. sanguisuga (Leconte, 1855 were comparatively analysed with emphasis on the genital structures of the male bug: the phallosome (Ph, the phallosome struts (SPh, the endosoma process (PrEn, the vesica (V and the articulatory apparatus (Apb. The phallic structures were useful as a supplementary morphological criterion to the present taxonomical standards. These wild species are found naturally infected by Trypanosoma cruzi in the United States and Mexico. Some of them live outside human dwellings while other are occasionally domiciliary, although they do not colonize these homes.

  16. Combining Public Health Education and Disease Ecology Research: Using Citizen Science to Assess Chagas Disease Entomological Risk in Texas.

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    Rachel Curtis-Robles

    2015-12-01

    Full Text Available Chagas disease is a zoonotic parasitic disease well-documented throughout the Americas and transmitted primarily by triatomine 'kissing bug' vectors. In acknowledgment of the successful history of vector control programs based on community participation across Latin America, we used a citizen science approach to gain novel insight into the geographic distribution, seasonal activity, and Trypanosoma cruzi infection prevalence of kissing bugs in Texas while empowering the public with information about Chagas disease.We accepted submissions of kissing bugs encountered by the public in Texas and other states from 2013-2014 while providing educational literature about Chagas disease. In the laboratory, kissing bugs were identified to species, dissected, and tested for T. cruzi infection. A total of 1,980 triatomines were submitted to the program comprised of at least seven species, of which T. gerstaeckeri and T. sanguisuga were the most abundant (85.7% of submissions. Triatomines were most commonly collected from dog kennels and outdoor patios; Overall, 10.5% of triatomines were collected from inside the home. Triatomines were submitted from across Texas, including many counties which were not previously known to harbor kissing bugs. Kissing bugs were captured primarily throughout April-October, and peak activity occurred in June-July. Emails to our dedicated account regarding kissing bugs were more frequent in the summer months (June-August than the rest of the year. We detected T. cruzi in 63.3% of tested bugs.Citizen science is an efficient approach for generating data on the distribution, phenology, and infection prevalence of kissing bugs-vectors of the Chagas disease parasite-while educating the public and medical community.

  17. On the identity of some weevil species described by Johann Christian Fabricius (1745-1808) in the Museum of Zoology of Copenhagen (Coleoptera, Cucujoidea, Curculionoidea, Tenebrionoidea).

    Science.gov (United States)

    Alonso-Zarazaga, Miguel A

    2014-01-01

    ) (from Attelabus), Nerthopssticticus (Fabricius, 1777) (from Curculio), Piezotracheluscrotalariae (Fabricius, 1802) (from Attelabus), and Poropterusgranulatus (Fabricius, 1802) (from Curculio). The junior homonym Brachycerusuva Fabricius, 1792 (non Sparrman, 1785) is replaced by Brachycerusfabricii nom. n. The following new synonymies are established: Brachycerusobesus (Fabricius, 1775) = Curculioscalaris Fabricius, 1777, syn. n., Brachydereslusitanicus (Fabricius, 1781) = Curculiomoratus Fabricius, 1798, syn. n., Brachypera (Brachypera) crinita (Boheman, 1834) = Curculiostriatus Fabricius, 1787, syn. n., Brachysomuserinaceus (Fabricius, 1802) = Brachysomusvillosulus (Germar, 1824), syn. n., Bronchusabruptecostatus (Gyllenhal, 1833) = Curculiospectrum Fabricius, 1802, syn. n., Bronchusnivosus (Sparrman, 1785) = Curculiorecurvus Fabricius, 1802, syn. n., Camptorhinustibialis (Sparrman, 1785) = Rhynchaenusalienatus Fabricius, 1802, syn. n., Coelocephalapionatrirostre (Fabricius, 1802) = Coelocephalapionluteirostre (Gerstäcker, 1854), syn. n., Cyrtoderescristatus (DeGeer, 1778) (Tenebrionidae) = Brachyceruscristatus Fabricius, 1798, syn. n., Desmidophorushebes (Fabricius, 1781) = Curculiotuberculatus Fabricius, 1792, syn. n., Donussalviae (Schrank, 1789) = Curculiodenticornis Fabricius, 1798, syn. n., Exomiasholosericeus (Fabricius, 1802) = Exomiaschevrolati (Boheman, 1842), syn. n., Nerthopssticticus (Fabricius, 1777) = Nerthopsguttatus (Olivier, 1807), syn. n., Phyllobiusoblongus (Linnaeus, 1758) = Curculiomali Fabricius, 1782, syn. n., and Rhinocyllusconicus (Froelich, 1792) = Bruchuspunctatus Fabricius, 1798, syn. n. Bronchussynthesys sp. n. is described to represent the concept of Hipporhinusspectrum sensu Marshall, 1904, a misidentification.

  18. First records of Chrysomelidae (Insecta, Coleoptera on blueberries in Argentina: new associations between native chrysomelids and an exotic crop Primeros registros de Chrysomelidae (Insecta, Coleoptera sobre arándanos en Argentina: nuevas asociaciones entre crisomélidos nativos y un cultivo exótico

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    Nora Cabrera

    2012-06-01

    Full Text Available The blueberry, Vaccinium corymbosum L. (Ericaceae, is a shrub native to the northern Hemisphere introduced in Argentina, where it occupies small cultivated areas mainly in the provinces of Buenos Aires, Entre Ríos and Tucumán. At present, little is known about insects associated with this crop in Argentina. The aim of this study was to identify the species of Chrysomelidae present in blueberry crops in different regions of Argentina, and to present new chrysomelids-blueberry associations. Identification diagnosis, geographical distribution, association with other plants and aspects of their biology is given for each species. Seven species of crop-damaging Chrysomelidae were recorded in blueberry crops of Buenos Aires and Entre Rios. They belong to the subfamilies Galerucinae: Diabrotica speciosa (Germar, Disonychodes exclamationis (Boheman, Caeporis stigmula Germar, and Cacoscelis melanoptera Germar; Eumolpinae: Percolaspis varia (Lefèvre, and Spintherophyta semiaurata (Klug; and Cryptocephalinae: Lexiphanes coenobita Suffrian.El arándano, Vaccinium corymbosum L. (Ericaceae, es un arbusto nativo del hemisferio Norte, que fue introducido en la Argentina donde ocupa pequeñas áreas cultivadas, principalmente en las provincias de Buenos Aires, Entre Ríos y Tucumán. Hasta la actualidad, se conoce poco sobre los insectos asociados con este cultivo. El objetivo de este trabajo es relevar las especies de crisomélidos presentes en los cultivos de arándano de diferentes regiones, y aportar nuevas asociaciones crisomélidos-arándano para la Argentina. Para cada especie registrada, se brinda la diagnosis para su reconocimiento, su distribución geográfica, la asociación con otras plantas y algunos aspectos de su biología. Se registraron siete especies de Chrysomelidae que utilizan el arándano como recurso alimenticio en las provincias de Buenos Aires y Entre Ríos: subfamilia Galerucinae: Diabrotica speciosa (Germar, Disonychodes

  19. Taxonomy and cladistics of the group of genera related to Cyrtomon Schoenherr (Coleoptera: Curculionidae: Naupactini

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    ANALÍA A. LANTERI

    2016-01-01

    Full Text Available En esta contribución se actualiza la información taxonómica y geográ- fica sobre cinco géneros de gorgojos (Curculionidae: Entiminae: Naupactini dis- tribuidos en Argentina, Brasil, Bolivia, Paraguay y Uruguay. Como resultado de un análisis cladístico basado en 48 caracteres morfológicos y 18 taxones terminales (dos del grupo externo y 16 del grupo en estudio se obtuvo un árbol de máxima parsimonia con dos subgrupos principales, uno formado por Mendozella Hustache como taxón hermano de Cyrtomon Schoenherr, y otro por Lamprocyphopsis Lan- teri, Priocyphopsis Lanteri y Priocyphus Hustache. De acuerdo con este resultado Cyrtomon hirsutus (Hustache es la especie hermana de Mendozella curvispinis (Hustache, en consecuencia se estableció la nueva combinación Mendozella hir - suta (Hustache, y se establece que el género Mendozella incluye actualmente dos especies, ambas distribuidas en Mendoza, Argentina. Cyrtomon se recuperó como grupo monofilético con seis species, C. gibber (Pallas, C. pistor (Boheman, C. luridus (Boheman, C. inhalatus (Germar, C. ovalipennis (Hustache y C. glaucus (Bovie. Priocyphus es monofilético e incluye cinco species, P. bosqi Hustache, P. hustachei Kuschel, P. inops Kuschel, P. kuscheli Lanteri y la especie nueva Prio- cyphus cordobensis; Lamprocyphopsis incluye dos especies, L. viridinitens (Kus- chel y L. paraguayensis Lanteri; y Priocyphopsis es monotípico, con la especie tipo P. humeridens (Hustache como grupo hermano de Priocyphus . Se brindan diagnosis de todos los géneros, una clave para la identificación de todas las espe- cies y fotografías de hábitos, en la mayoría de los casos de sus ejemplares tipo. Se ilustran los caracteres diagnósticos de la cabeza y rostro, tibias anteriores y genita- lia con dibujos lineales. Se describen por primera vez los genitales de la hembra de Mendozella hirsuta y los genitales masculinos de Priocyphus kuscheli.

  20. Mutantes morfológicos de algodoeiro herbáceo como fonte de resistência ao bicudo Morphological mutants of upland cotton as source of boll weevil resistance

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    Francisco das Chagas Vidal Neto

    2005-02-01

    Full Text Available Este trabalho teve como objetivo avaliar os efeitos de três características morfológicas mutantes de linhagens de algodoeiro herbáceo (Gossypium hirsutum L. r. latifolium Hutch., isoladas ou combinadas no mesmo genótipo, como fonte de resistência ao bicudo, Anthonomus grandis Boheman, 1843 (Coleoptera, Curculionidae. O experimento foi conduzido em campo, sob infestação natural, com delineamento de blocos ao acaso e arranjo fatorial 2´3 com um tratamento adicional, com quatro repetições. Em teste com chance de escolha, a característica bráctea frego foi a que apresentou maior redução no dano de oviposição pelo bicudo (34,71%, em relação ao equivalente normal. A folha "okra" reduziu o dano apenas quando associada à bráctea frego (40%. A combinação das três características mutantes na mesma planta proporcionou a menor porcentagem de botões com dano de oviposição (23,13%.This work aimed to evaluate the effects of three morphological mutants of upland cotton lines (Gossypium hirsutm L. r. latifolium Hutch., isolated or in combination in the same cotton genotype, as a source of resistance to boll weevil, Anthonomus grandis Boheman, 1843 (Coleoptera, Curculionidae. The experiment was carried out in the field, under natural infestation, with a completely randomized block design arranged in a factorial 2´3 plus an additional treatment, with four replications. In a multiple choice test, the character mutant frego bract presented the higher reduction on boll weevil oviposition damage (34.71%, in relation to the normal equivalent. The okra leaf reduced the boll weevil damage only when associated with frego bract (40%. The combination of the three mutant characters in the same plant presented the least square percent with oviposition damage (23.13%.

  1. An experiment using neutron activation analysis and a rare earth element to mark cotton plants and two insects that feed on them

    Energy Technology Data Exchange (ETDEWEB)

    Showler, Allan T. [USDA-ARS IFNRRU, Kika de la Garza Subtropical Agricultural Research Center, 2413 East Highway 83, Weslaco, TX 78596 (United States)]. E-mail: ashowler@weslaco.ars.usda.gov; James, William D. [Elemental Analysis Laboratory, 3144 Texas A and M University, College Station, TX 77843-3144 (United States); Armstrong, John S. [USDA-ARS BIRU, Kika de la Garza Subtropical Agricultural Research Center, 2413 East Highway 83, Weslaco, TX 78596 (United States); Westbrook, John K. [USDA-ARS APMRU, 2771 F and B Road, College Station, TX 77845-4966 (United States)

    2006-08-15

    Studies on insect dispersal and other behaviors can benefit from using markers that will not alter flight and fitness. Rare earth elements, such as samarium (Sm), have been used as ingested markers of some insects and detected using neutron activation analysis (NAA). In this study, samarium nitrate hexahydrate was mixed into artificial diet for boll weevils, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), at different dosages and in water used to irrigate cotton, Gossypium hirsutum L. Samarium was detected in adult boll weevils fed on the samarium-labeled diet, but not after 5 or 10 days of being switched to non-labeled diet, even if the insects were given labeled diet for as long as 7 consecutive days. Introduced in irrigation water, 1% samarium (m/m) was detectable in cotton squares and leaf tissue. However, boll weevil adults fed samarium-labeled squares did not retain detectable levels of samarium, nor did boll weevil adults reared to adulthood from samarium-labeled squares. Fourth instar beet armyworms, Spodoptera exigua (Huebner) (Noctuidae: Lepidoptera), fed on samarium-labeled cotton leaves obtained enough samarium for NAA detection, but adult moths reared from them did not have detectable amounts of samarium. Although samarium can be useful as a marker when insects are presented with a continuous pulse of the label, elements that are assimilated by the insect would be more useful if a continuous infusion of the marker cannot be provided.

  2. Integrative Taxonomy, Phylogeny, and New Species of the Weevil Genus Onyxacalles Stüben (Coleoptera: Curculionidae: Cryptorhynchinae

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    Peter E. Stüben

    2012-01-01

    Full Text Available A molecular phylogeny of the western Palearctic weevil genus Onyxacalles Stüben, 1999 is presented, combining two mitochondrial genes (COI and 16S in a Bayesian analysis. Based on molecular data, Onyxacalles pyrenaeus Boheman, 1844 is transferred into the genus Kyklioacalles Stüben 1999 (K. fausti group and—in an integrative taxonomy framework—the interaction between morphology and molecular analysis is illustrated. The species of Onyxacalles s. str. are assigned to three new species groups, O. henoni, O. luigionii, and O. portusveneris groups. The distribution of the related species in the Mediterranean area is illustrated with values of COI and 16S p-distances. Three new species are described and distinguished from their related species: Onyxacalles nuraghi Stüben sp.n. from Italy (Sardinia, Onyxacalles torre Stüben and Astrin sp. n. from France (Corsica and Onyxacalles vilae Stüben sp. n. from Croatia (Velebit Mts.. A catalogue of all 20 species of Onyxacalles is given, and a key is finally presented combined with image stacking of the habitus and aedeagus for all species.

  3. A contribution to the knowledge of the subfamily Panagaeinae Hope, 1838 from Africa. Part 2. Revision of the Craspedophorus leprieuri and C. regalis groups (Coleoptera: Carabidae).

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    Häckel, Martin

    2017-02-22

    Afrotropical species of the Craspedophorus leprieuri and Craspedophorus regalis groups are revised. C. clasispilus (Alluaud, 1915) and C. guineensis Basilewsky, 1987 are considered as subspecies of C. leprieuri (Laporte de Castelnau, 1835); the synonymized C. peringueyi Csiki, 1929 (=laticollis Péringuey, 1904) is restated as subspecies of C. leprieuri, and it is described C. leprieuri zambianus (DR Congo: Katanga Province; Zambia); C. pseudofestivus Burgeon, 1930 is considered subspecies of C. merus Péringuey, 1904, and it is described C. merus lundanus (Angola, DR Congo: Kasai-Oriental and Katanga Provinces); C. bouvieri imperialis Burgeon, 1930 is considered to be a separate species of C. bouvieri (Rousseau, 1905), and C. bouvieri dux Basilewsky, 1951 is transferred to C. imperialis. The synonymized C. sayersii (Hope, 1842) is considered to be a good subspecies of C. regalis. C. bouvieri crampeli (Alluaud, 1915) is removed from C. bouvieri, and transferred to C. reflexus (Fabricius, 1781) in the C. reflexus species group (Häckel 2016). In this group C. uelensis Burgeon, 1930 is considered to be a subspecies of C. reflexus; and C. bozasi Alluaud, 1930 is synonymized with C. reflexus uelensis Burgeon, 1930. C. arnosti Häckel 2016 is synonymized with C. reflexus crampeli (Alluaud, 1915), C. ethmoides Alluaud, 1930 is synonymized with C. impictus (Boheman, 1848), and C. lebaudyi Alluaud, 1932 is synonymized with C. stanleyi Alluaud, 1930.

  4. First records of Chrysomelidae (Insecta, Coleoptera on blueberries in Argentina: new associations between native chrysomelids and an exotic crop

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    Nora CABRERA

    2012-01-01

    Full Text Available El arándano, Vaccinium corymbosum L. (Ericaceae, es un arbusto nativo del hemisferio Norte, que fue introducido en la Argentina donde ocupa pequeñas áreas cultivadas, principalmente en las provincias de Buenos Aires, Entre Ríos y Tucumán. Hasta la actualidad, se conoce poco sobre los insectos asociados con este cultivo. El objetivo de este trabajo es relevar las especies de crisomélidos presentes en los cultivos de arándano de diferentes regiones, y aportar nuevas asociaciones crisomélidos-arándano para la Argentina. Para cada especie registrada, se brinda la diagnosis para su reconocimiento, su distribución geográfica, la asociación con otras plantas y algunos aspectos de su biología. Se registraron siete especies de Chrysomelidae que utilizan el arándano como recurso alimenticio en las provincias de Buenos Aires y Entre Ríos: subfamilia Galerucinae: Diabrotica speciosa (Germar, Disonychodes exclamationis (Boheman, Caeporis stigmula Germar, Cacoscelis melanoptera Germar; subfamilia Eumolpinae: Percolaspis varia (Lefèvre y Spintherophyta semiaurata (Klug; y subfamilia Cryptocephalinae: Lexiphanes coenobita Suffrian.

  5. A PCR-Based Diagnostic System for Differentiating Two Weevil Species (Coleoptera: Curculionidae) of Economic Importance to the Chilean Citrus Industry.

    Science.gov (United States)

    Aguirre, C; Olivares, N; Luppichini, P; Hinrichsen, P

    2015-02-01

    A PCR-based method was developed to identify Naupactus cervinus (Boheman) and Naupactus xanthographus (Germar), two curculionids affecting the citrus industry in Chile. The quarantine status of these two species depends on the country to which fruits are exported. This identification method was developed because it is not possible to discriminate between these two species at the egg stage. The method is based on the species-specific amplification of sequences of internal transcribed spacers, for which we cloned and sequenced these genome fragments from each species. We designed an identification system based on two duplex-PCR reactions. Each one contains the species-specific primer set and a second generic primer set that amplify a short 18S region common to coleopterans, to avoid false negatives. The marker system is able to differentiate each Naupactus species at any life stage, and with a diagnostic sensitivity to 0.045 ng of genomic DNA. This PCR kit was validated by samples collected from different citrus production areas throughout Chile and showed 100% accuracy in differentiating the two Naupactus species. © 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.

  6. Ecology and phenology of the boll weevil (Coleoptera: Curculionidae) on an unusual wild host, Hibiscus pernambucensis, in southeastern Mexico.

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    Arzaluz, I O; Jones, R W

    2001-12-01

    The phenology and ecology of Hibiscus pernambucensis Arruda and its interaction and importance in maintaining populations of the boll weevil, Anthonomus grandis Boheman, were studied over a period of 3 yr in the Soconusco Region of the state of Chiapas, Mexico. H. pernambucensis is a small tree of Neotropical distribution, restricted to lowland areas, and generally associated with halophytic vegetation. This species is found exclusively along the shores of brackish estuaries, in or near mangrove swamps in southeastern Mexico. In this region, H. pernambucensis has a highly seasonal flowering pattern in which the greatest bud production occurs shortly after the start of the rainy season in May and the highest fruit production occurs in July and August. Boll weevil larvae were found in buds of H. pernambucensis during all months but February and densities of buds and weevils were highest from May through September. The percentage of buds infested with boll weevil larvae rarely exceeded 30%. Because plant densities and reproductive output of H. pernambucensis is relatively low and, consequently, the number of oviposition and larval development sites for boll weevils is limited, the importance of this plant as a source of boll weevils with potential of attacking commercial cotton is minimal in comparison with the quantity produced in cultivated cotton. However, the plant could be important as a reservoir of boll weevils in areas of boll weevil quarantine and eradication programs. The factors and circumstances that may have led to this apparent recent host shift of the boll weevil in this region are discussed.

  7. Effects of insecticides and defoliants applied alone and in combination for control of overwintering boll weevil (Anthonomus grandis; Coleoptera: Curculionidae)--laboratory and field studies.

    Science.gov (United States)

    Greenberg, Shoil M; Sappington, Thomas W; Elzen, Gary W; Norman, John W; Sparks, Alton N

    2004-09-01

    In laboratory, greenhouse and field tests, we determined the effects of combining full rates of the defoliants tribufos and thidiazuron and the herbicide thifensulfuron-methyl with half rates of the insecticides lambda-cyhalothrin or azinphos-methyl, and the combination of tribufos and thidiazuron, both in half rates, on mortality of the boll weevil, Anthonomus grandis grandis Boheman and on the quality of defoliation. Tribufos, 0.47 kg ha(-1) and tribufos, 0.235 kg ha(-1) + thidiazuron, 0.125 kg ha(-1) exhibited a slightly toxic effect to boll weevil, while tribufos, 0.47 kg ha(-1) + lambda-cyhalothrin, 0.019 kg ha(-1), tribufos, 0.47 kg ha(-1) + azinphos-methyl, 0.14 kg ha(-1), and tribufos, 0.235 kg ha(-1) + thidiazuron, 0.125 kg ha(-1) + azinphos-methyl, 0.14 kg ha(-l), provided control of boll weevil as good as or better than full-rate azinphos-methyl or lambda-cyhalothrin alone owing to synergistic effects. Thidiazuron or thifensulfuron-methyl alone or in combination with insecticides did not affect boll weevil mortality. Treatment with tribufos + thidiazuron, both at half rate, significantly increased defoliation compared to full rates of tribufos or thidiazuron alone, and provided adequate defoliation for approximately the same cost per hectare.

  8. Digestion of Starch Granules from Maize, Potato and Wheat by Larvae of the the Yellow Mealworm, Tenebrio molitor and the Mexican Bean Weevil, Zabrotes subfasciatus

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    Meireles, Elaine A.; Carneiro, Cíntia N. B.; DaMatta, Renato A.; Samuels, Richard I.; Silva, Carlos P.

    2009-01-01

    Scanning electron microscopy images were taken of starch granules from different sources following exposure in vivo and in vitro to gut α-amylases isolated from Tenebrio molitor L. (Coleoptera: Tenebrionidae) and Zabrotes subfasciatus Boheman (Coleoptera: Bruchidae). One α-amylase was isolated from whole larval midguts of T. molitor using non-denaturing SDS-PAGE, while two other α-amylase fractions were isolated from whole larval midguts of Z. subfasciatus using hydrophobic interaction chromatography., Digested starch granules from larvae fed on maize, potato or wheat were isolated from midgut contents. Combinations of starch granules with isolated α-amylases from both species showed similar patterns of granule degradation. In vitro enzymatic degradation of maize starch granules by the three different α-amylase fractions began by creating small holes and crater-like areas on the surface of the granules. Over time, these holes increased in number and area resulting in extensive degradation of the granule structure. Granules from potato did not show formation of pits and craters on their surface, but presented extensive erosion in their interior. For all types of starch, as soon as the interior of the starch granule was reached, the inner layers of amylose and amylopectin were differentially hydrolyzed, resulting in a striated pattern. These data support the hypothesis that the pattern of starch degradation depends more on the granule type than on the α-amylase involved. PMID:19619014

  9. New Curculionoidea (Coleoptera records for Quebec, Canada

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    Pierre de Tonnancour

    2017-06-01

    Full Text Available The following species of Curculionoidea are newly recorded from the Canadian province of Quebec: Coelocephalapion emaciipes (Fall, 1898; Ischnopterapion virens (Herbst, 1797; Omphalapion hookerorum (Kirby, 1808; Perapion punctinasum (J.B. Smith, 1884 (all Brentidae; Anthonomus robustulus LeConte, 1876; Pseudanthonomus helvolus (Boheman, 1843; Bagous magister LeConte, 1876; Bagous tanneri O’Brien, 1979; Buchananius striatus (LeConte, 1876; Ceutorhynchus bolteri Dietz, 1896; Ceutorhynchus pallidactylus (Marsham, 1802; Ceutorhynchus pauxillus Dietz, 1896; Conotrachelus buchanani Schoof, 1942; Conotrachelus pusillus LeConte, 1878; Conotrachelus recessus (Casey, 1910; Curculio rubidus (Gyllenhal, 1835; Cylindrocopturus longulus (LeConte, 1876; Hadroplontus litura (Fabricius, 1775; Hypera rumicis (Linnaeus, 1758; Lixus terminalis LeConte, 1876; Myosides seriehispidus Roelofs, 1873; Phloeotribus dentifrons (Blackman, 1921; Plocamus echidna (LeConte, 1876; Scolytus muticus Say, 1824; Sirocalodes sericans (LeConte, 1876; Smicronyx sculpticollis Casey, 1892 (all Curculionidae. Among these, Buchananius striatus, Conotrachelus buchanani, Conotrachelus pusillus, and Curculio rubidus (all Curculionidae are also recorded from Canada for the first time. The latter is also newly reported from Ontario. Collecting data are provided for Lixus punctinasus LeConte, 1876, previously reported to occur in Canada without any further information, and for Choragus sayi LeConte, 1876 (Anthribidae and Rhyssomatus aequalis Horn, 1873 (Curculionidae, both previously recorded from Quebec, also without further details.

  10. New Curculionoidea (Coleoptera) records for Quebec, Canada.

    Science.gov (United States)

    de Tonnancour, Pierre; Anderson, Robert S; Bouchard, Patrice; Chantal, Claude; Dumont, Stéphane; Vigneault, Robert

    2017-01-01

    The following species of Curculionoidea are newly recorded from the Canadian province of Quebec: Coelocephalapion emaciipes (Fall, 1898); Ischnopterapion virens (Herbst, 1797); Omphalapion hookerorum (Kirby, 1808); Perapion punctinasum (J.B. Smith, 1884) (all Brentidae); Anthonomus robustulus LeConte, 1876; Pseudanthonomus helvolus (Boheman, 1843); Bagous magister LeConte, 1876; Bagous tanneri O'Brien, 1979; Buchananius striatus (LeConte, 1876); Ceutorhynchus bolteri Dietz, 1896; Ceutorhynchus pallidactylus (Marsham, 1802); Ceutorhynchus pauxillus Dietz, 1896; Conotrachelus buchanani Schoof, 1942; Conotrachelus pusillus LeConte, 1878; Conotrachelus recessus (Casey, 1910); Curculio rubidus (Gyllenhal, 1835); Cylindrocopturus longulus (LeConte, 1876); Hadroplontus litura (Fabricius, 1775); Hypera rumicis (Linnaeus, 1758); Lixus terminalis LeConte, 1876; Myosides seriehispidus Roelofs, 1873; Phloeotribus dentifrons (Blackman, 1921); Plocamus echidna (LeConte, 1876); Scolytus muticus Say, 1824; Sirocalodes sericans (LeConte, 1876); Smicronyx sculpticollis Casey, 1892 (all Curculionidae). Among these, Buchananius striatus, Conotrachelus buchanani, Conotrachelus pusillus, and Curculio rubidus (all Curculionidae) are also recorded from Canada for the first time. The latter is also newly reported from Ontario. Collecting data are provided for Lixus punctinasus LeConte, 1876, previously reported to occur in Canada without any further information, and for Choragus sayi LeConte, 1876 (Anthribidae) and Rhyssomatus aequalis Horn, 1873 (Curculionidae), both previously recorded from Quebec, also without further details.

  11. Widespread Trypanosoma cruzi infection in government working dogs along the Texas-Mexico border: Discordant serology, parasite genotyping and associated vectors.

    Science.gov (United States)

    Meyers, Alyssa C; Meinders, Marvin; Hamer, Sarah A

    2017-08-01

    Chagas disease, caused by the vector-borne protozoan Trypanosoma cruzi, is increasingly recognized in the southern U.S. Government-owned working dogs along the Texas-Mexico border could be at heightened risk due to prolonged exposure outdoors in habitats with high densities of vectors. We quantified working dog exposure to T. cruzi, characterized parasite strains, and analyzed associated triatomine vectors along the Texas-Mexico border. In 2015-2016, we sampled government working dogs in five management areas plus a training center in Texas and collected triatomine vectors from canine environments. Canine serum was tested for anti-T. cruzi antibodies with up to three serological tests including two immunochromatographic assays (Stat-Pak and Trypanosoma Detect) and indirect fluorescent antibody (IFA) test. The buffy coat fraction of blood and vector hindguts were tested for T. cruzi DNA and parasite discrete typing unit was determined. Overall seroprevalence was 7.4 and 18.9% (n = 528) in a conservative versus inclusive analysis, respectively, based on classifying weakly reactive samples as negative versus positive. Canines in two western management areas had 2.6-2.8 (95% CI: 1.0-6.8 p = 0.02-0.04) times greater odds of seropositivity compared to the training center. Parasite DNA was detected in three dogs (0.6%), including TcI and TcI/TcIV mix. Nine of 20 (45%) T. gerstaeckeri and T. rubida were infected with TcI and TcIV; insects analyzed for bloodmeals (n = 11) fed primarily on canine (54.5%). Government working dogs have widespread exposure to T. cruzi across the Texas-Mexico border. Interpretation of sample serostatus was challenged by discordant results across testing platforms and very faint serological bands. In the absence of gold standard methodologies, epidemiological studies will benefit from presenting a range of results based on different tests/interpretation criteria to encompass uncertainty. Working dogs are highly trained in security functions and

  12. A REVISION OF THE PACHNEPHORUS FROM THE AFROTROPICAL REGION (COLEOPTERA, CHRYSOMELIDAE

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    Stefano Zoia

    2007-04-01

    Full Text Available A revision of the genus Pachnephorus Chevrolat, 1837 from the Afrotropical Region is given and a key to the species is provided. Types of all the previously known taxa have been studied and redescribed; 40 new taxa are described and illustrated: P. achardi n. sp. (Mali, P. aequatorianus n. sp. (Rep. Pop. Congo, P. aethiopicus n. sp. (Etiopia, P. baehri n. sp. (Namibia, P. balyi n. sp. (Angola, P. beharui n. sp. (Etiopia, P. bertiae n. sp. (Madagascar, P. bezdeki n. sp. (Rep. Pop. Congo, P. bracarumvestitus n. sp. (Rep. Pop. Congo, P. bryanti n. sp. (Mali, P. burgeoni n. sp. (Natal, P. camerun­ensis n. sp. (Camerun, P. cristiani n. sp. (Namibia, P. crocodilinus n. sp. (Zambia, P. daccordii n. sp. (Yemen, P. danielssoni n. sp. (Sierra Leone, P. danielssoni congoanus n. ssp. (Rep. Pop. Congo, P. demeyeri n. sp. (Rep. Pop. Congo, P. episternalis n. sp. (Madagascar, P. fabianae n. sp. (Congo, P. fasciatus occidentalis n. ssp. (Nigeria, P. gardinii n. sp. (Etiopia, P. gerstaeckeri n. sp. (Namibia, P. grobbelaarae n. sp. (South Africa, P. hajeki n. sp. (Madagascar, P. lopatini n. sp. (Senegal, P. malicus n. sp. (Mali, P. maroantsetranus n. sp. (Madagascar, P. medvedevi n. sp. (Zambia, P. mo­seykoi n. sp. (Chad, P. pacificus n. sp. (Central Afr. Rep., P. parentorum n. sp. (Ghana, P. poggii n. sp. (Somalia, P. regalini n. sp. (Zambia, P. rigatoi n. sp. (Kenya, P. sas­sii n. sp. (Guinea Bissau, P. shuteae n. sp. (Rep. South Africa, P. sprecherae n. sp. (Madagascar, P. uhligi n. sp. (Namibia, P. willersi n. sp. (Namibia. The lectoypes of P. conspersus Gerstaecker, 1871, P. senegalensis Achard, 1914, P. latior Pic, 1921 and P. testaceipes Fairmaire, 1880 are designated. A new synonymy (P. costatus Achard, 1914 n. syn. of P. torridus Baly, 1878 and a nomenclatural change (Mecistes lineatus (Pic, 1921 n. comb. for Pachnephorus lineatus Pic, 1921 are proposed; the Lectotypes of M. lineatus and of M. flavipes (Gerstaecker, 1855 are designated.

  13. Método de diagnóstico para el monitoreo de resistencia a insecticidas en poblaciones de "picudo del algodonero", Anthonomus grandis (Coleoptera: Curculionidae A diagnostic test for insecticide resistance monitoring in "cotton boll weevil" Anthonomus grandis (Coleoptera: Curculionidae populations

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    Teodoro Stadler

    2009-06-01

    Full Text Available El control de las poblaciones de Anthonomus grandis Boheman, por debajo de su umbral de daño económico durante el ciclo del cultivo del algodón, se realiza en forma efectiva hasta el momento, a través de insecticidas de síntesis. La presión selectiva de las aplicaciones extensivas e intensivas de insecticidas hace imperativa la detección temprana de focos de resistencia a los mismos, en función de un correcto manejo del fenómeno. Se desarrolló un método de diagnóstico de resistencia para A. grandis a partir de la técnica "vial test", que fue adaptada en forma de "kit" para el monitoreo rápido y sencillo de los focos de resistencia en el campo. La toxicidad (CL99, para calcular la concentración discriminante (CD del insecticida y la preparación del "kit", se obtiene a partir de bioensayos de laboratorio con una cepa normal susceptible de A. grandis. Se determinó la vida media de los insecticidas dentro de los viales por CIPAC MT 46, para establecer una fecha de vencimiento del "kit". La CD y el método en su conjunto fueron validados a través de ensayos a campo. El "kit", usado en el monitoreo de resistencia en el campo, fue especialmente diseñado para ser utilizado en las condiciones geográficas, económicas y socio-culturales presentes en la región algodonera argentina. La implementación de esta técnica permitirá conseguir la información necesaria, y así obtener una apropiada alternancia de insecticidas. Como consecuencia, se prevé una reducción de impacto ambiental de las prácticas agronómicas en el control de plagas en algodón.The in-season control of the cotton boll weevil Anthonomus grandis Boheman is done by insecticide application, which so far is the only effective way to reduce boll weevil populations to levels below economic significance. The extensive and intensive control actions with insecticides cause selective pressure on pest populations. Thus, to achieve an accurate insecticide resistance

  14. Comportamento de progênies oriundas de raças primitivas de algodão herbáceo frente ao ataque do bicudo Behavior of lines from cotton primitive race stocks to attack of the boll weevil

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    Francisco José Correia Farias

    1999-12-01

    Full Text Available Com o objetivo de obter linhagens resistentes ao bicudo-do-algodoeiro (Anthonomus grandis Boheman, a Embrapa-Centro Nacional de Pesquisa de Algodão vem testando progênies oriundas de raças primitivas de algodoeiro herbáceo (Gossypium hirsutum L. originárias do México e da América Central, que apresentam níveis aceitáveis de resistência ao bicudo. Em 1991 e 1992, as progênies em BC1F5 e BC1F6 oriundas das linhagens Texas 277, Texas 326 e Texas 1180, Texas 297, Texas 339, Texas 766 e Texas 1134, foram avaliadas com relação à resistência ao bicudo. O delineamento experimental utilizado foi o de blocos ao acaso, com seis repetições. A unidade experimental foi constituída por duas fileiras de 5 m, sob um espaçamento de 0,75 m x 0,20 m. As parcelas foram infestadas com adultos do bicudo recém-emergidos, a uma taxa de 10.000 adultos/ha. Aos seis dias após a liberação dos adultos, as parcelas foram pulverizadas com Cipermethrim, sendo realizadas em intervalos semanais. Foram procedidas cinco avaliações através da coleta de 33 botões florais ao acaso, por parcela. Os maiores níveis de resistência ao bicudo foram obtidos pelas progênies Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 e Texas 339, com redução de ataque de 44,0, 41,2, 32,0, 40,4 e 36,4%, respectivamente, em relação à testemunha CNPA 6H.The goal of the boll weevil (Anthonomus grandis Boheman resistance program of Embrapa-Centro Nacional de Pesquisa de Algodão is to obtain cultivars that give 80% suppression when compared to commercial cultivars. The primitive cottons (Gossypium hirsutum L. from Mexico and Central America have been known to show measurable levels of resistance to the boll weevil. In 1991 and 1992, the lines in BC1F5 and BC1F6 from Texas 277, Texas 326, Texas 1180, Texas 297, Texas 339, Texas 766 and Texas 1134 were evaluated to boll weevil resistance. The experiment was carried out at Campina Grande, PB, Brazil. The trial

  15. New Curculionoidea (Coleoptera) records for Canada.

    Science.gov (United States)

    Douglas, Hume; Bouchard, Patrice; Anderson, Robert S; de Tonnancour, Pierre; Vigneault, Robert; Webster, Reginald P

    2013-01-01

    The following species of Curculionoidea are recorded from Canada for the first time, in ten cases also representing new records at the generic level: Ischnopterapion (Ischnopterapion) loti (Kirby, 1808); Stenopterapion meliloti (Kirby, 1808) (both Brentidae); Atrichonotus taeniatulus (Berg, 1881); Barinus cribricollis (LeConte, 1876); Caulophilus dubius (Horn, 1873); Cionus scrophulariae (Linnaeus, 1758); Cryptorhynchus tristis LeConte, 1876; Cylindrocopturus furnissi Buchanan, 1940; Cylindrocopturus quercus (Say, 1832); Desmoglyptus crenatus (LeConte, 1876); Pnigodes setosus LeConte, 1876; Pseudopentarthrum parvicollis (Casey, 1892); Sibariops confinis (LeConte, 1876); Sibariops confusus (Boheman, 1836); Smicronyx griseus LeConte, 1876; Smicronyx lineolatus Casey, 1892; Euwallacea validus (Eichhoff, 1875); Hylocurus rudis (LeConte, 1876); Lymantor alaskanus Wood, 1978; Phloeotribus scabricollis (Hopkins, 1916); Scolytus oregoni Blackman, 1934; Xyleborus celsus Eichhoff, 1868; Xyleborus ferrugineus (Fabricius, 1801); Xylosandrus crassiusculus (Motschulsky, 1866) (all Curculionidae). In addition the following species were recorded for the first time from these provinces and territories: Yukon - Dendroctonus simplex LeConte, 1868; Phloetribus piceae Swaine, 1911 (both Curculionidae); Northwest Territories - Loborhynchapion cyanitinctum (Fall, 1927) (Brentidae); Nunavut - Dendroctonus simplex LeConte, 1868 (Curculionidae); Alberta - Anthonomus tectus LeConte, 1876; Promecotarsus densus Casey, 1892; Dendroctonus ponderosae Hopkins, 1902; Hylastes macer LeConte, 1868; Rhyncolus knowltoni (Thatcher, 1940); Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae); Saskatchewan - Phloeotribus liminaris (Harris, 1852); Rhyncolus knowltoni (Thatcher, 1940); Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae); Manitoba - Cosmobaris scolopacea Germar, 1819; Listronotus maculicollis (Kirby, 1837); Listronotus punctiger LeConte, 1876; Scolytus schevyrewi

  16. New Curculionoidea (Coleoptera records for Canadа

    Directory of Open Access Journals (Sweden)

    Hume Douglas

    2013-06-01

    Full Text Available The following species of Curculionoidea are recorded from Canada for the first time, in ten cases also representing new records at the generic level: Ischnopterapion (Ischnopterapion loti (Kirby, 1808; Stenopterapion meliloti (Kirby, 1808 (both Brentidae; Atrichonotus taeniatulus (Berg, 1881; Barinus cribricollis (LeConte, 1876; Caulophilus dubius (Horn, 1873; Cionus scrophulariae (Linnaeus, 1758; Cryptorhynchus tristis LeConte, 1876; Cylindrocopturus furnissi Buchanan, 1940; Cylindrocopturus quercus (Say, 1832; Desmoglyptus crenatus (LeConte, 1876; Pnigodes setosus LeConte, 1876; Pseudopentarthrum parvicollis (Casey, 1892; Sibariops confinis (LeConte, 1876; Sibariops confusus (Boheman, 1836; Smicronyx griseus LeConte, 1876; Smicronyx lineolatus Casey, 1892; Euwallacea validus (Eichhoff, 1875; Hylocurus rudis (LeConte, 1876; Lymantor alaskanus Wood, 1978; Phloeotribus scabricollis (Hopkins, 1916; Scolytus oregoni Blackman, 1934; Xyleborus celsus Eichhoff, 1868; Xyleborus ferrugineus (Fabricius, 1801; Xylosandrus crassiusculus (Motschulsky, 1866 (all Curculionidae. In addition the following species were recorded for the first time from these provinces and territories: Yukon – Dendroctonus simplex LeConte, 1868; Phloetribus piceae Swaine, 1911 (both Curculionidae; Northwest Territories – Loborhynchapion cyanitinctum (Fall, 1927 (Brentidae; Nunavut – Dendroctonus simplex LeConte, 1868 (Curculionidae; Alberta – Anthonomus tectus LeConte, 1876; Promecotarsus densus Casey, 1892; Dendroctonus ponderosae Hopkins, 1902; Hylastes macer LeConte, 1868; Rhyncolus knowltoni (Thatcher, 1940; Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae; Saskatchewan – Phloeotribus liminaris (Harris, 1852; Rhyncolus knowltoni (Thatcher, 1940; Scolytus schevyrewi Semenov Tjan-Shansky, 1902 (all Curculionidae; Manitoba – Cosmobaris scolopacea Germar, 1819; Listronotus maculicollis (Kirby, 1837; Listronotus punctiger LeConte, 1876; Scolytus

  17. Posición taxonómica de Acrotomopus atropunctellus (Coleoptera: Curculionidae y descripción del daño producido en el cultivo de caña de azúcar en la Argentina Taxonomic position of Acrotomopus atropunctellus (Coleoptera: Curculionidae and description of damages to sugar cane crops in Argentina

    Directory of Open Access Journals (Sweden)

    M. L. Pilar Pérez

    2012-12-01

    Full Text Available Acrotomopus atropunctellus (Boheman (Curculionidae: Molytinae: Cholini es una especie de picudo, endémica de la Argentina, que habita principalmente en la provincia biogeográfica de las Yungas; citada como perjudicial para la caña de azúcar en 1929. Hasta hace una década, no se habían producido nuevos reportes de daños, sin embargo, el aumento de la superficie cultivada con caña ha provocado el resurgimiento de la plaga. Morfológicamente, esta especie se asemeja a Acrotomopus wagneri Hustache, distribuida en la provincia biogeográfica del Chaco. Su biología es similar a la de otras especies de la tribu Cholini con larvas minadoras de cañas. Las hembras oviponen en las porciones basal y media de los plantines. Las larvas cavan galerías descendentes hasta alcanzar la cepa para pasar allí el invierno y reducen paulatinamente el rebrote de la caña en las siguientes temporadas. Los adultos producen perforaciones de pequeño diámetro y bordes ásperos en los brotes, macollos, tallos y nervadura central de las hojas. Se brinda una clave dicotómica para separar A. atropunctellus de las otras tres especies del género, todas presentes en la Argentina (A. wagneri, A. microspilotus (Pascoe y A. obtusus (Hustache y se describen los rasgos principales de su ciclo biológico y de los daños ocasionados en cultivos de caña de la provincia de Tucumán. El trabajo incluye fotografías de hábito de las cuatro especies de Acrotomopus, y de la larva y los daños ocasionados por A. atropunctellus.Acrotomopus atropunctellus (Boheman (Curculionidae: Molytinae: Cholini is a weevil species endemic to Argentina, mainly inhabiting the biogeographic province of the Yungas. It was first reported as harmful to sugar cane in 1929. Damages were not cited again until a decade ago, when the species became a serious pest due to the increased sugar cane production. This species is morphologically similar to A. wagneri Hustache that occurs in the Chacoan

  18. On the identity of some weevil species described by Johann Christian Fabricius (1745–1808) in the Museum of Zoology of Copenhagen (Coleoptera, Cucujoidea, Curculionoidea, Tenebrionoidea)

    Science.gov (United States)

    Alonso-Zarazaga, Miguel A.

    2014-01-01

    ), Coelocephalapion atrirostre (Fabricius, 1802) (from Attelabus), Nerthops sticticus (Fabricius, 1777) (from Curculio), Piezotrachelus crotalariae (Fabricius, 1802) (from Attelabus), and Poropterus granulatus (Fabricius, 1802) (from Curculio). The junior homonym Brachycerus uva Fabricius, 1792 (non Sparrman, 1785) is replaced by Brachycerus fabricii nom. n. The following new synonymies are established: Brachycerus obesus (Fabricius, 1775) = Curculio scalaris Fabricius, 1777, syn. n., Brachyderes lusitanicus (Fabricius, 1781) = Curculio moratus Fabricius, 1798, syn. n., Brachypera (Brachypera) crinita (Boheman, 1834) = Curculio striatus Fabricius, 1787, syn. n., Brachysomus erinaceus (Fabricius, 1802) = Brachysomus villosulus (Germar, 1824), syn. n., Bronchus abruptecostatus (Gyllenhal, 1833) = Curculio spectrum Fabricius, 1802, syn. n., Bronchus nivosus (Sparrman, 1785) = Curculio recurvus Fabricius, 1802, syn. n., Camptorhinus tibialis (Sparrman, 1785) = Rhynchaenus alienatus Fabricius, 1802, syn. n., Coelocephalapion atrirostre (Fabricius, 1802) = Coelocephalapion luteirostre (Gerstäcker, 1854), syn. n., Cyrtoderes cristatus (DeGeer, 1778) (Tenebrionidae) = Brachycerus cristatus Fabricius, 1798, syn. n., Desmidophorus hebes (Fabricius, 1781) = Curculio tuberculatus Fabricius, 1792, syn. n., Donus salviae (Schrank, 1789) = Curculio denticornis Fabricius, 1798, syn. n., Exomias holosericeus (Fabricius, 1802) = Exomias chevrolati (Boheman, 1842), syn. n., Nerthops sticticus (Fabricius, 1777) = Nerthops guttatus (Olivier, 1807), syn. n., Phyllobius oblongus (Linnaeus, 1758) = Curculio mali Fabricius, 1782, syn. n., and Rhinocyllus conicus (Froelich, 1792) = Bruchus punctatus Fabricius, 1798, syn. n. Bronchus synthesys sp. n. is described to represent the concept of Hipporhinus spectrum sensu Marshall, 1904, a misidentification. PMID:25493048

  19. On the identity of some weevil species described by Johann Christian Fabricius (1745–1808 in the Museum of Zoology of Copenhagen (Coleoptera, Cucujoidea, Curculionoidea, Tenebrionoidea

    Directory of Open Access Journals (Sweden)

    Miguel Alonso-Zarazaga

    2014-11-01

    atrirostre (Fabricius, 1802 (from Attelabus, Nerthops sticticus (Fabricius, 1777 (from Curculio, Piezotrachelus crotalariae (Fabricius, 1802 (from Attelabus, and Poropterus granulatus (Fabricius, 1802 (from Curculio. The junior homonym Brachycerus uva Fabricius, 1792 (non Sparrman, 1785 is replaced by Brachycerus fabricii nom. n. The following new synonymies are established: Brachycerus obesus (Fabricius, 1775 = Curculio scalaris Fabricius, 1777, syn. n., Brachyderes lusitanicus (Fabricius, 1781 = Curculio moratus Fabricius, 1798, syn. n., Brachypera (Brachypera crinita (Boheman, 1834 = Curculio striatus Fabricius, 1787, syn. n., Brachysomus erinaceus (Fabricius, 1802 = Brachysomus villosulus (Germar, 1824, syn. n., Bronchus abruptecostatus (Gyllenhal, 1833 = Curculio spectrum Fabricius, 1802, syn. n., Bronchus nivosus (Sparrman, 1785 = Curculio recurvus Fabricius, 1802, syn. n., Camptorhinus tibialis (Sparrman, 1785 = Rhynchaenus alienatus Fabricius, 1802, syn. n., Coelocephalapion atrirostre (Fabricius, 1802 = Coelocephalapion luteirostre (Gerstäcker, 1854, syn. n., Cyrtoderes cristatus (DeGeer, 1778 (Tenebrionidae = Brachycerus cristatus Fabricius, 1798, syn. n., Desmidophorus hebes (Fabricius, 1781 = Curculio tuberculatus Fabricius, 1792, syn. n., Donus salviae (Schrank, 1789 = Curculio denticornis Fabricius, 1798, syn. n., Exomias holosericeus (Fabricius, 1802 = Exomias chevrolati (Boheman, 1842, syn. n., Nerthops sticticus (Fabricius, 1777 = Nerthops guttatus (Olivier, 1807, syn. n., Phyllobius oblongus (Linnaeus, 1758 = Curculio mali Fabricius, 1782, syn. n., and Rhinocyllus conicus (Froelich, 1792 = Bruchus punctatus Fabricius, 1798, syn. n. Bronchus synthesys sp. n. is described to represent the concept of Hipporhinus spectrum sensu Marshall, 1904, a misidentification.

  20. Host plants of the tarnished plant bug (Heteroptera: Miridae) in Central Texas.

    Science.gov (United States)

    Esquivel, J F; Mowery, S V

    2007-08-01

    The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), has taken on added importance as a pest of cotton in the Cotton Belt after successful eradication efforts for the boll weevil (Anthonomus grandis grandis Boheman). Because the Southern Blacklands region of Central Texas is in advanced stages of boll weevil eradication, blooming weeds and selected row crops were sampled during a 3-yr study to determine lygus species composition and associated temporal host plants. L. lineolaris was the sole lygus species in the region. Thirteen previously unreported host plants were identified for L. lineolaris, of which 69% supported reproduction. Rapistrum rugosum L. Allioni and Ratibida columnifera (Nuttall) Wooton and Standley were primary weed hosts during the early season (17 March to 31 May). Conyza canadensis L. Cronquist variety canadensis and Ambrosia trifida L. were primary weed hosts during the midseason (1 June to 14 August) and late-season (15 August to 30 November), respectively. Sisymbrium irio L. and Lamium amplexicaule L. sustained L. lineolaris populations during the overwintering period (1 December to 16 March). The proportion of females and numbers of nymphs found in R. rugosum, C. canadensis, A. trifida, and S. irio suggests these weeds supported reproductive adults during the early, mid-, and late season and overwintering period, respectively. Medicago sativa L. was the leading crop host for L. lineolaris; Glycine max L. Merrill did not yield L. lineolaris. Few L. lineolaris were collected in Gossypium hirsutum L. These results provide a more comprehensive assessment of host plants contributing to L. lineolaris populations in central Texas.

  1. Cotton harvest at 40% versus 75% boll-splitting on yield and economic return under standard and proactive boll weevil (Coleoptera: Curculionidae) spray regimes.

    Science.gov (United States)

    Showler, A T; Robinson, J R C

    2008-10-01

    The standard practice of two or three preemptive insecticide applications at the start of pinhead (1-2-mm-diameter) squaring followed by threshold-triggered (when 10% of randomly selected squares have oviposition punctures) insecticide applications for boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), control does not provide reliable protection of cotton, Gossypium hirsutum L., lint production. This study, conducted during 2004 and 2005, showed that three to six fewer spray applications in a "proactive" approach, in which spraying began at the start of large (5.5-8-mm-diameter) square formation and continued at approximately 7-d intervals while large squares were abundant, resulted in fewer infested squares and 1.4- to 1.7-fold more lint than the standard treatment. Fewer sprays and increased yield made proactive spraying significantly more profitable than the standard approach, which resulted in relatively low or negative economic returns. Harvest at 75% boll-split in the proactive spray regime of 2005 resulted in four-fold greater economic return than cotton harvested at 40% boll-split because of improved protection of large squares and the elimination of late-season sprays inherent to standard spray regime despite the cost of an extra irrigation in the 75% boll-split treatments. The earlier, 40% harvest trigger does not avoid high late-season boll weevil pressure, which exerts less impact on bolls, the predominant form of fruiting body at that time, than on squares. Proactive spraying and harvest timing are based on an important relationship between nutrition, boll weevil reproduction, and economic inputs; therefore, the tactic of combining proaction with harvest at 75% boll-split is applicable where boll weevils are problematic regardless of climate or region, or whether an eradication program is ongoing.

  2. Colonization of Artificially Stressed Black Walnut Trees by Ambrosia Beetle, Bark Beetle, and Other Weevil Species (Coleoptera: Curculionidae) in Indiana and Missouri.

    Science.gov (United States)

    Reed, Sharon E; Juzwik, Jennifer; English, James T; Ginzel, Matthew D

    2015-12-01

    Thousand cankers disease (TCD) is a new disease of black walnut (Juglans nigra L.) in the eastern United States. The disease is caused by the interaction of the aggressive bark beetle Pityophthorus juglandis Blackman and the canker-forming fungus, Geosmithia morbida M. Kolarik, E. Freeland, C. Utley & Tisserat, carried by the beetle. Other insects also colonize TCD-symptomatic trees and may also carry pathogens. A trap tree survey was conducted in Indiana and Missouri to characterize the assemblage of ambrosia beetles, bark beetles, and other weevils attracted to the main stems and crowns of stressed black walnut. More than 100 trees were girdled and treated with glyphosate (Riverdale Razor Pro, Burr Ridge, Illinois) at 27 locations. Nearly 17,000 insects were collected from logs harvested from girdled walnut trees. These insects represented 15 ambrosia beetle, four bark beetle, and seven other weevil species. The most abundant species included Xyleborinus saxeseni Ratzburg, Xylosandrus crassiusculus Motschulsky, Xylosandrus germanus Blandford, Xyleborus affinis Eichhoff, and Stenomimus pallidus Boheman. These species differed in their association with the stems or crowns of stressed trees. Multiple species of insects were collected from individual trees and likely colonized tissues near each other. At least three of the abundant species found (S. pallidus, X. crassiusculus, and X. germanus) are known to carry propagules of canker-causing fungi of black walnut. In summary, a large number of ambrosia beetles, bark beetles, and other weevils are attracted to stressed walnut trees in Indiana and Missouri. Several of these species have the potential to introduce walnut canker pathogens during colonization. © 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.

  3. A model for long-distance dispersal of boll weevils (Coleoptera: Curculionidae)

    Science.gov (United States)

    Westbrook, John K.; Eyster, Ritchie S.; Allen, Charles T.

    2011-07-01

    The boll weevil, Anthonomus grandis (Boheman), has been a major insect pest of cotton production in the US, accounting for yield losses and control costs on the order of several billion US dollars since the introduction of the pest in 1892. Boll weevil eradication programs have eliminated reproducing populations in nearly 94%, and progressed toward eradication within the remaining 6%, of cotton production areas. However, the ability of weevils to disperse and reinfest eradicated zones threatens to undermine the previous investment toward eradication of this pest. In this study, the HYSPLIT atmospheric dispersion model was used to simulate daily wind-aided dispersal of weevils from the Lower Rio Grande Valley (LRGV) of southern Texas and northeastern Mexico. Simulated weevil dispersal was compared with weekly capture of weevils in pheromone traps along highway trap lines between the LRGV and the South Texas / Winter Garden zone of the Texas Boll Weevil Eradication Program. A logistic regression model was fit to the probability of capturing at least one weevil in individual pheromone traps relative to specific values of simulated weevil dispersal, which resulted in 60.4% concordance, 21.3% discordance, and 18.3% ties in estimating captures and non-captures. During the first full year of active eradication with widespread insecticide applications in 2006, the dispersal model accurately estimated 71.8%, erroneously estimated 12.5%, and tied 15.7% of capture and non-capture events. Model simulations provide a temporal risk assessment over large areas of weevil reinfestation resulting from dispersal by prevailing winds. Eradication program managers can use the model risk assessment information to effectively schedule and target enhanced trapping, crop scouting, and insecticide applications.

  4. Posición taxonómica de Acrotomopus atropunctellus (Coleoptera: Curculionidae y descripción del daño producido en el cultivo de caña de azúcar en la Argentina

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    M. L. Pilar PÉREZ

    2012-01-01

    Full Text Available Acrotomopus atropunctellus (Boheman (Curculionidae: Molytinae: Cholini es una especie de picudo, endémica de la Argentina, que habita principalmente en la provincia biogeográfica de las Yungas; citada como perjudicial para la caña de azúcar en 1929. Hasta hace una década, no se habían producido nuevos reportes de daños, sin embargo, el aumento de la superficie cultivada con caña ha provocado el resurgimiento de la plaga. Morfológicamente, esta especie se asemeja a Acrotomopus wagneri Hustache, distribuida en la provincia biogeográfica del Chaco. Su biología es similar a la de otras especies de la tribu Cholini con larvas minadoras de cañas. Las hembras oviponen en las porciones basal y media de los plantines. Las larvas cavan galerías descendentes hasta alcanzar la cepa para pasar allí el invierno y reducen paulatinamente el rebrote de la caña en las siguientes temporadas. Los adultos producen perforaciones de pequeño diámetro y bordes ásperos en los brotes, macollos, tallos y nervadura central de las hojas. Se brinda una clave dicotómica para separar A. atropunctellus de las otras tres especies del género, todas presentes en la Argentina (A. wagneri, A. microspilotus (Pascoe y A. obtusus (Hustache y se describen los rasgos principales de su ciclo biológico y de los daños ocasionados en cultivos de caña de la provincia de Tucumán. El trabajo incluye fotografías de hábito de las cuatro especies de Acrotomopus, y de la larva y los daños ocasionados por A. atropunctellus.

  5. Field evaluation of Bt cotton crop impact on nontarget pests: cotton aphid and boll weevil.

    Science.gov (United States)

    Sujii, E R; Togni, P H B; de A Ribeiro, P; de A Bernardes, T; Milane, P V G N; Paula, D P; Pires, C S S; Fontes, E M G

    2013-02-01

    Bt cotton plants expressing Cry1Ac protein have high specificity for the control of lepidopteran larvae. However, studies conducted in several countries have shown these plants have a differential impact on nontarget herbivores. The aim of this study was to compare the colonization rates and population abundance of the cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae) and the boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae), in plots of Bt (Nuopal) and non-Bt cotton (Delta Opal) in an experimental field in Brasilia, DF, Brazil. No difference was observed in the preference and colonization by winged aphids to plants from the two treatments. There was no significant difference in abundance of wingless aphids or in the production of winged aphids between treatments. Apparently, the parameters that control factors such as fecundity, survival, and dispersal were similar on both Bt and non-Bt plants. Monitoring of plants for coccinellids, a specialist predator of aphids, and ants that act on the dispersal of aphids among plants showed no significant difference between Bt and non-Bt plants, supporting the inference above. Regarding the effect on boll weevil, there was also no significant difference between treatments in the total number of fruiting structures attacked in each plot, the percentage of fruiting structures attacked per plant or on the number of weevils emerging from fruits with boll weevil damage from egg-laying, when damaged fruit samples were held in the laboratory. Based on these results, we conclude that there is no impact of Bt cotton crop expressing Cry1Ac on the nontarget herbivores tested under field conditions.

  6. Chagas disease risk in Texas.

    Science.gov (United States)

    Sarkar, Sahotra; Strutz, Stavana E; Frank, David M; Rivaldi, Chissa-Louise; Sissel, Blake; Sánchez-Cordero, Victor

    2010-10-05

    Chagas disease, caused by Trypanosoma cruzi, remains a serious public health concern in many areas of Latin America, including México. It is also endemic in Texas with an autochthonous canine cycle, abundant vectors (Triatoma species) in many counties, and established domestic and peridomestic cycles which make competent reservoirs available throughout the state. Yet, Chagas disease is not reportable in Texas, blood donor screening is not mandatory, and the serological profiles of human and canine populations remain unknown. The purpose of this analysis was to provide a formal risk assessment, including risk maps, which recommends the removal of these lacunae. The spatial relative risk of the establishment of autochthonous Chagas disease cycles in Texas was assessed using a five-stage analysis. 1. Ecological risk for Chagas disease was established at a fine spatial resolution using a maximum entropy algorithm that takes as input occurrence points of vectors and environmental layers. The analysis was restricted to triatomine vector species for which new data were generated through field collection and through collation of post-1960 museum records in both México and the United States with sufficiently low georeferenced error to be admissible given the spatial resolution of the analysis (1 arc-minute). The new data extended the distribution of vector species to 10 new Texas counties. The models predicted that Triatoma gerstaeckeri has a large region of contiguous suitable habitat in the southern United States and México, T. lecticularia has a diffuse suitable habitat distribution along both coasts of the same region, and T. sanguisuga has a disjoint suitable habitat distribution along the coasts of the United States. The ecological risk is highest in south Texas. 2. Incidence-based relative risk was computed at the county level using the Bayesian Besag-York-Mollié model and post-1960 T. cruzi incidence data. This risk is concentrated in south Texas. 3. The

  7. Chagas disease risk in Texas.

    Directory of Open Access Journals (Sweden)

    Sahotra Sarkar

    Full Text Available BACKGROUND: Chagas disease, caused by Trypanosoma cruzi, remains a serious public health concern in many areas of Latin America, including México. It is also endemic in Texas with an autochthonous canine cycle, abundant vectors (Triatoma species in many counties, and established domestic and peridomestic cycles which make competent reservoirs available throughout the state. Yet, Chagas disease is not reportable in Texas, blood donor screening is not mandatory, and the serological profiles of human and canine populations remain unknown. The purpose of this analysis was to provide a formal risk assessment, including risk maps, which recommends the removal of these lacunae. METHODS AND FINDINGS: The spatial relative risk of the establishment of autochthonous Chagas disease cycles in Texas was assessed using a five-stage analysis. 1. Ecological risk for Chagas disease was established at a fine spatial resolution using a maximum entropy algorithm that takes as input occurrence points of vectors and environmental layers. The analysis was restricted to triatomine vector species for which new data were generated through field collection and through collation of post-1960 museum records in both México and the United States with sufficiently low georeferenced error to be admissible given the spatial resolution of the analysis (1 arc-minute. The new data extended the distribution of vector species to 10 new Texas counties. The models predicted that Triatoma gerstaeckeri has a large region of contiguous suitable habitat in the southern United States and México, T. lecticularia has a diffuse suitable habitat distribution along both coasts of the same region, and T. sanguisuga has a disjoint suitable habitat distribution along the coasts of the United States. The ecological risk is highest in south Texas. 2. Incidence-based relative risk was computed at the county level using the Bayesian Besag-York-Mollié model and post-1960 T. cruzi incidence data. This

  8. Leafhoppers and Cixiids in Phytoplasma-infected Carrot Fields: Species Composition and Potential Phytoplasma Vectors

    Directory of Open Access Journals (Sweden)

    Tanja Drobnjaković

    2010-01-01

    Full Text Available The first molecular analysis of samples collected in southern Bačka (Serbia confirmed the presence of aster yellows (16SrI and stolbur phytoplasmas (16SrXII in insects belonging to the family Cicadellidae, as well as in carrot plants where the insects were collected. A correct identification of the phytoplasmas and their vectors is essential to arrange effective control strategies to prevent diseases associated with phytoplasmas from spreading to carrots and other vegetable crops. In order to enhance knowledgeabout insect vectors of aster yellows and stolbur phytoplasmas in Serbia, Cicadellidae and Cixiidae (Homoptera Auchenorrhyncha, the most common vectors of these phytoplasmas,were monitored in southern Bačka during 2008. Adults leaf- and planthoppers were collected and identified at species level using standard entomological methods,and tested for phytoplasma presence by means of PCR/RFLP. A total of 13 insect species of Cicadellidae were identified, as follows: a three species of the subfamily Agallinae: Anaceratagallia ribauti (Ossiannilsson, Anaceratagallia venosa (Fourcroy,and Anaceratagallia laevis (Ribaut; b seven species of the subfamily Deltocephalinae: Psammotettix confinis (Dahlbom, Psammotettix striatus (Linnaues Psammottettix alienus (Dahlbom, Macrosteles sexnotatus (Fallén, Ophiola decumana (Kontkanen,Errastunus ocellaris Fallén, and Scaphoideus titanus Ball; c three species of the subfamily Typhlocibinae: Eupteryx atropunctata (Goeze, Eupteryx mellissae Curtis, Zyginidia pullula (Boheman. Female specimens of the genus Euscelis (Deltocephalinae were also collected, as well as one species of Reptalus quinquecostatus (Dufour of the family Cixiidae. Stolbur phytoplasmas were detected in A. laevis, A. ribauti, A. venosa, P. striatus, P. confinis and P. alienus. The species: A. laevis, O. decumana, and P. confinis were AY-infected (subgroup 16SrI-A, while subgroup 16SrI-C was found only in one specimen of P. confinis. Since some

  9. Toxicity of an Annonin-Based Commercial Bioinsecticide Against Three Primary Pest Species of Stored Products.

    Science.gov (United States)

    Ribeiro, L P; Zanardi, O Z; Gonçalves, G L P; Ansante, T F; Yamamoto, P T; Vendramim, J D

    2017-03-28

    The effects of a bioinsecticide formulation based on extract of Annona squamosa L. (Annonaceae) containing 10,000 mg L(-1) of acetogenin annonin as the main active ingredient were investigated against three primary pest species of stored grains in Brazil [maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), Mexican bean weevil Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae: Bruchinae), and cowpea weevil Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae: Bruchinae)] by means of residual contact bioassays. In a concentration-dependent manner, the annonin-based commercial bioinsecticide caused significant adult mortality of C. maculatus (LC50 = 6890 μL kg(-1)), S. zeamais (LC50 = 2781 μL kg(-1)), and Z. subfasciatus (LC50 = 2120 μL kg(-1)) after 120 h of residual contact exposure. In addition to acute toxicity, the tested bioinsecticide also promoted a significant reduction of the number of eggs laid by females of C. maculatus (EC50 = 5949.7 μL kg(-1)) and Z. subfasciatus (EC50 = 552.7 μL kg(-1)). Moreover, the bioinsecticide significantly reduced the number of emerged insects (F1 generation) of C. maculatus (EC50 = 2763.0 μL kg(-1)), S. zeamais (EC50 = 1380.8 μL kg(-1)), and Z. subfasciatus (EC50 = 561.5 μL kg(-1)). The bioinsecticide also reduced the percentage of damaged grains for the three pest species studied, and its grain-protectant properties are comparable to or superior in efficacy in relation to a diatomaceous earth-based insecticide (Insecto® at 1000 mg kg(-1)) used as a positive control. Thus, this standardized formulation has promising bioactivity against stored insect species and can be a useful component for IPM of stored grains in Brazil and elsewhere.

  10. Migration and dispersal of Anthonomus grandis (Coleoptera: Curculionidae in South America

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    Teodoro STADLER

    2007-01-01

    Full Text Available El presente estudio sobre la dispersión de Anthonomus grandis Boheman, el picudo del algodonero, en Argentina, Brasil, Paraguay y Bolivia, explora las características ecológicas y fisiológicas que han permitido a este insecto dispersarse y establecerse exitosamente en América del Sur. La plasticidad fenotípica de A. grandis se caracteriza por un tiempo de desarrollo flexible, ciclo de vida multivoltino con generaciones superpuestas, la capacidad de alimentarse con polen de diversas familias botánicas así como de otras fuentes de alimento y por su habilidad para migrar y dispersarse con la ayuda del viento. Todo esto hace de esta especie una plaga clave para el cultivo del algodón. Los cultivos de cítricos en Misiones, Argentina, son posibles sitios para la hibernación de esta especie. En esta región fueron capturadas grandes cantidades de individuos prediapausantes, provenientes de algodonales en post-cosecha en Paraguay, atraídos probablemente por compuestos volátiles de cítricos cultivados en la zona. La quiescencia facultativa que atraviesan los adultos ante condiciones adversas, conlleva a un retraso en el desarrollo que se relaciona con las condiciones desfavorables. Esto sugiere que la hibernación en A. grandis puede ser definida como «oligopausa», una forma intermedia de diapausa. Desde su introducción en Brasil en 1983 y hasta el 2006, el picudo se ha dispersado en dirección sudoeste hacia Argentina, a una velocidad promedio de 61 km año-1. Sin embargo, le ha insumido aproximadamente diez años cruzar 250 km, desde Paraguay hacia el centro de la zona algodonera de Argentina. Este progreso más lento se debe probablemente a las acciones llevadas a cabo en el marco del programa de erradicación del picudo del algodonero, por parte del gobierno de Argentina. La llegada del picudo al área central de cultivo de algodón en la Argentina, así como a otras áreas de cultivo en Paraguay y Argentina, confirma el hecho de que

  11. Método de diagnóstico para el monitoreo de resistencia a insecticidas en poblaciones de “picudo del algodonero”, Anthonomus grandis (Coleoptera: Curculionidae

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    Teodoro STADLER

    2009-01-01

    Full Text Available El control de las poblaciones de Anthonomus grandis Boheman, por debajo de su umbral de daño económico durante el ciclo del cultivo del algodón, se realiza en forma efectiva hasta el momento, a través de insecticidas de síntesis. La presión selectiva de las aplicaciones extensivas e intensivas de insecticidas hace imperativa la detección temprana de focos de resistencia a los mismos, en función de un correcto manejo del fenómeno. Se desarrolló un método de diagnóstico de resistencia para A. grandis a partir de la técnica “vial test”, que fue adaptada en forma de “kit” para el monitoreo rápido y sencillo de los focos de resistencia en el campo. La toxicidad (CL99, para calcular la concentración discriminante (CD del insecticida y la preparación del “kit”, se obtiene a partir de bioensayos de laboratorio con una cepa normal susceptible de A. grandis. Se determinó la vida media de los insecticidas dentro de los viales por CIPAC MT 46, para establecer una fecha de vencimiento del “kit”. La CD y el método en su conjunto fueron validados a través de ensayos a campo. El “kit”, usado en el monitoreo de resistencia en el campo, fue especialmente diseñado para ser utilizado en las condiciones geográficas, económicas y socio-culturales presentes en la región algodonera argentina. La implementación de esta técnica permitirá conseguir la información necesaria, y así obtener una apropiada alternancia de insecticidas. Como consecuencia, se prevé una reducción de impactoambiental de las prácticas agronómicas en el control de plagas en algodón.

  12. Molecular systematics and morphological identification of the cryptic species of the genus Acalles Schoenherr, 1825, with descriptions of new species (Coleoptera: Curculionidae: Cryptorhynchinae).

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    Schütte, André; Stüben, Peter E

    2015-02-02

    Molecular systematics and morphological study of the monophyletic weevil genus Acalles Schoenherr, 1825 are presented. Based on the mitochondrial CO1 barcoding gene and 16S ribosomal RNA gene, we discuss three difficult species complexes in the framework of a molecular phylogenetic reconstruction of 37 of 47 Western Palaearctic Acalles species or subspecies: the A. echinatus, A. maraoensis and A. sierrae complexes. Two results are given: 1. An exclusive focus on morphological, exoskeletal methods reach their limits in the case of many cryptic Cryptorhynchinae. In these cases molecular analysis is indispensable to resolve species level questions. 2. By using a combination of phenotypic and genotypic characters it is not only possible to ascertain phylogenetic relationships, but also to uncover new morphological, non-intraspecifical characteristics. Digital photography with image stacking makes this possible: for the first time we present photo key for Acalles species, a reliable, less costly and quick method for identification alongside DNA barcoding. The following taxonomic changes are given: Coloracalles edoughensis Desbrochers, 1892 comb. nov. (formerly Acalles edoughensis) from North Africa and Spain change to Coloracalles Astrin & Stüben, 2008 and Pseudodichromacalles xerampelinus Wollaston, 1864 comb. nov. from the Canarian Island Tenerife, Acalles bazaensis Stüben, 2001 syn. nov. is a junior synonym of Acalles sierrae H. Brisout, 1865. Two new species of Acalles s. str. , A. iblanensis Stüben sp. nov. from Morocco and A. vorsti Stüben sp. nov. from Spain (Mallorca), and a new species of the subgenus Origoacalles Stüben & Astrin 2010, A. granulimaculosus Stüben sp. nov. from La Gomera, are described. Acalles temperei Péricart, 1987 stat. nov. is a subspecies of A. parvulus Boheman, 1837. A catalogue of all 43 (+4 incertae sedis) species of Acalles is presented. Finally and for the first time we compare 9 of 12 known North American so-called "Acalles

  13. Cholini (Coleoptera: Curculionidae: Molytinae housed in the Invertebrate Collection of the Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil Cholini (Coleoptera: Curculionidae, Molytinae depositados na Coleção de Invertebrados do Instituto Nacional de Pesquisas da Amazônia

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    Márcio Luís Leitão Barbosa

    2011-01-01

    Full Text Available In Brazilian Amazonia, Cholini (Coleoptera, Curculionidae, Molytinae is represented by 53 species distributed in seven genera: Ameris Dejean, 1821; Cholus Germar, 1824; Homalinotus Sahlberg, 1823; Lobaspis Chevrolat, 1881; Odontoderes Sahlberg, 1823; Ozopherus Pascoe, 1872 and Rhinastus Schoenherr, 1825. This work documents the species of Cholini housed in the Invertebrate Collection of the Instituto Nacional de Pesquisas da Amazônia, Manaus, Brazil and gives the geographical and biological data associated with them. A total of 186 Cholini specimens were identified as belonging to 14 species (13 from Brazilian Amazonia and five genera (Cholus, Homalinotus, Odontoderes, Ozopherus and Rhinastus. Only 24% of the Cholini species reported from Brazilian Amazonia are actually represented in the INPA collection, underscoring the need for a more systematical collecting based on available biological information. The known geographical distribution was expanded for the following species: Cholus granifer (Chevrolat, 1881 for Brazil; C. pantherinus (Olivier, 1790 for Manaus (Amazonas; Cholus parallelogrammus (Germar, 1824 for Piraquara (Paraná; Homalinotus depressus (Linnaeus, 1758 for lago Janauacá (Amazonas and rio Tocantins (Pará; H. humeralis (Gyllenhal, 1836 for Novo Airão, Coari (Amazonas and Porto Velho (Rondônia; H. nodipennis (Chevrolat, 1878 for Carauari, Lábrea (Amazonas and Ariquemes (Rondônia; H. validus (Olivier, 1790 for rio Araguaia (Brasil, Manaus (Amazonas, rio Tocantins (Pará, Porto Velho and BR 364, Km 130 (Rondônia; Odontoderes carinatus (Guérin-Méneville, 1844 for Manaus (Amazonas; O. spinicollis (Boheman, 1836 for rio Uraricoera (Roraima; and Ozopherus muricatus Pascoe, 1872 for lago Janauacá (Amazonas. Homalinotus humeralis is reported for the first time from "urucuri" palm, Attalea phalerata Mart. ex Spreng.Na Amazônia brasileira, Cholini (Coleoptera, Curculionidae, Molytinae é representada por 53 espécies, distribu

  14. Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae females deprived of the host Phaseolus vulgaris (Fabaceae Comportamento de ovoposição de fêmeas selvagens de Zabrotes subfasciatus (Coleoptera, Chrysomelidae privadas do hospedeiro Phaseolus vulgaris (Fabaceae

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    Luiza A. A Sperandio

    2009-12-01

    Full Text Available The insects oviposition behavior is fundamental to study population dynamics, life history evolution, insect-plant and parasitoid-host interactions. Zabrotes subfasciatus (Boheman, 1833 females oviposition behavior in the presence and absence of a host is unknown. The main objective of this study was to describe in detail the oviposition behavior of host deprived or non-deprived females, and observe how the several situations of deprivation (days without host influence oviposition. Six groups were assembled, three deprived of the host (for 2, 5 and 8 days and three control groups (with host, each containing one newly-emerged couple (0-24h of wild Z. subfasciatus, The non-deprived (control groups received the hosts every day (5 bean seeds Phaseolus vulgaris (Fabaceae and the others were deprived for 2, 5 and 8 days, respectively. For each group 12 repetitions were made. Consequently, 12 couples were host deprived during two days, 12 couples were host deprived during five days and 12 couples were host deprived during eight days. When the seeds of the deprived groups were added the experiments started. There was a control group for each deprived group. The experiments and the insects were maintained at constant temperature 29 ± 2ºC and 70-80% relative humidity. At 15 minutes interval, the number of times the females manifested the different categories of behavior was observed (frequency. The behavior categories were: rest inside the box, locomotion, resource exploration (seeds, copulation and oviposition. The deprived females stayed most of the time in contact with the host to carry out oviposition, while the non-deprived (control females spent most of the time at rest. This was observed in all the deprivation times. The results show that host deprivation influences the oviposition behavior of the studied species and also shows the flexibility in the oviposition strategies that these females present when the environment changes (absence and

  15. Taxonomic revision of Afrotropical Laccophilus Leach, 1815 (Coleoptera, Dytiscidae).

    Science.gov (United States)

    Biström, Olof; Nilsson, Anders N; Bergsten, Johannes

    2015-01-01

    : Laccophilus continentalis Gschwendtner, 1935 = Laccophilus perplexus Omer-Cooper, 1970, syn. n., Laccophilus taeniolatus Régimbart, 1889 = Laccophilus congener Omer-Cooper, 1957, syn. n., Laccophilus adspersus Boheman, 1848 = Laccophilus vitshumbii Guignot, 1959, syn. n. = Laccophilus adspersus nigeriensis Omer-Cooper, 1970, syn. n. = Laccophilus adspersus sudanensis Omer-Cooper, 1970, syn. n., Laccophilus modestus Régimbart, 1895 = Laccophilus espanyoli Hernando, 1990, syn. n., Laccophilus flaveolus Régimbart, 1906 = Laccophilus pampinatus Guignot, 1941, syn. n., Laccophilus trilineola Régimbart, 1889 = Laccophilus simulator Omer-Cooper, 1958, syn. n., Laccophilus mediocris Guignot, 1952 = Laccophilus meii Rocchi, 2000, syn. n., Laccophilus epinephes Guignot, 1955 = Laccophilus castaneus Guignot, 1956, syn. n., Laccophilus saegeri Guignot, 1958 = Laccophilus comoensis Pederzani & Reintjes, 2002, syn. n., Laccophilus restrictus Sharp, 1882 = Laccophilus evanescens Régimbart, 1895, syn. n., Laccophilus incrassatus Gschwendtner, 1933 = Laccophilus virgatus Guignot, 1953, syn. n., Laccophilus cyclopis Sharp, 1882 = Laccophilus shephardi Omer-Cooper, 1965, syn. n., Laccophilus burgeoni Gschwendtner, 1930 = Laccophilus wittei Guignot, 1952, syn. n., Laccophilus secundus Régimbart, 1895 = Laccophilus torquatus Guignot, 1956, syn. n., Laccophilus desintegratus Régimbart, 1895 = Laccophilus sanguinosus Régimbart, 1895, syn. n. and Laccophilus flavopictus Régimbart, 1889 = Laccophilus bergeri Guignot, 1953, syn. n. = Laccophilus segmentatus Omer-Cooper, 1957, syn. n. Lectotypes are designated for the following taxa: Laccophilus productus Régimbart, 1906, Laccophilus ruficollis Zimmermann, 1919, Laccophilus sordidus Sharp, 1882, Laccophilus alluaudi Régimbart, 1899, Laccophilus pictipennis Sharp, 1882, Laccophilus wehnckei Sharp, 1882, Laccophilus continentalis Gschwendtner, 1935, Laccophilus simplicistriatus Gschwendtner, 1932, Laccophilus complicatus Sharp, 1882

  16. A taxonomic monograph of the genus Tylodinus Champion (Coleoptera: Curculionidae: Cryptorhynchinae: Tylodina) of Chiapas, Mexico.

    Science.gov (United States)

    Luna-Cozar, Jesús; Anderson, Robert S; Jones, Robert W; León-Corté, Jorge L

    2014-04-15

    nodulosus species group (3) T. andersoni new species (Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1), T. nodulosus (Boheman), T. zilchi Kuschel; Tylodinus pusillus species group (2) T. porvenirensis new species (type locality: Chiapas, El Porvenir, El Porvenir (2 km NE)), T. pusillus new species (type locality: Chiapas, 4 km SE Custepec); Tylodinus spiniventris species group (2) T. lum new species (Chiapas, San Cristóbal de las Casas, Cerro Huitepec), and T. spiniventris new species (type locality: Chiapas, San Cristóbal de las Casas, Reserva Huitepec); Incertae sedis (13) T. pinguis new species (type locality: Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1) , T. kissingeri new species (type locality: Chiapas, Tapalapa, ca. 14 km NE Coapilla), T. complicatus new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, La Yerbabuena), T. dominicus new species (type locality: Chiapas, Villa Corzo, Reserva de la Biósfera La Sepultura), T. noctis new species (type locality: Chiapas, Coapilla, ca. 10.5 km NE Coapilla), T. rufus new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec); T. branstetteri new species (type locality: Chiapas, La Concordia, 4 km SE Custepec), T. kuscheli new species (type locality: Chiapas, Villa Flores, Ejido Sierra Morena), T. pappi new species (type locality: Chiapas, Unión Juárez, Volcán Tacan), T. gibbosus new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, Yerbabuena Reserve), T. immundus new species (type locality: Chiapas, San Cristóbal de las Casas Cerro Huitepec), T. intzin new species (type locality: Chiapas, Tenejapa, Yashanal), T. elongatus new species (type locality: Chiapas, Ángel Albino Corzo, Reserva El Triunfo, Polígono 1). Three species (T. nodulosus (Boheman), T. zilchi Kuschel and T. cavicrus Champion) are not known to occur in Chiapas but were included in this study to be more representative of inter- and intraspecific variation and to provide a

  17. Migration and dispersal of Anthonomus grandis (Coleoptera: Curculionidae in South America Migración y dispersión de Anthonomus grandis (Coleoptera: Curculionidae en América del Sur

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    Teodoro Stadler

    2007-12-01

    Full Text Available This study discusses the dispersal of Anthonomus grandis Boheman, the cotton boll weevil, in Argentina, Brazil, Paraguay and Bolivia, exploring the ecological and physiological factors that have made the dispersal and establishment of this insect in South America so successful. The boll weevil's phenotypic plasticity is represented by its flexible developmental time, its multivoltine life cycle with several overlapping generations, its capacity to feed on pollen from diverse botanical families as well as from non pollen food sources and its ability to migrate and disperse aided by winds. These characteristics make it a key pest for cotton. Probable overwintering «hot spots» for the boll weevil were identified in Misiones-Argentina, where large numbers of prediapausing weevils concentrate after arrival from newly harvested cotton fields in Paraguay, probably attracted by citrus orchards volatiles. The boll weevil's facultative quiescence is always relative to environmental adverse conditions. This suggests that overwintering in the boll weevil can be defined as «oligopause», an intermediate form of diapause. Since its introduction to Brazil in 1983, until 2006, it has spread southwest at an average of 61 km year-1 towards Argentina. However, it took the boll weevil approximately ten years to move 250 km between Paraguay and the main cotton growing area in Argentina. This slower progress is probably due to the actions taken by the Argentine government through the boll weevil eradication program. The arrival of the boll weevil at the cotton cropping areas in Paraguay and Argentina reinforces the fact that the boll weevil should finally be included in an integrated cotton pest management program jointly with other major cotton pests.El presente estudio sobre la dispersión de Anthonomus grandis Boheman, el picudo del algodonero, en Argentina, Brasil, Paraguay y Bolivia, explora las características ecológicas y fisiológicas que han permitido a

  18. North-Western Palaearctic species of Pristiphora (Hymenoptera, Tenthredinidae

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    Marko Prous

    2017-09-01

    Full Text Available North-Western Palaearctic species of Pristiphora Latreille, 1810 are revised. Altogether, 90 species are treated, two of which are described as new: P. caraganae Vikberg & Prous, sp. n. from Finland and P. dedeara Liston & Prous, sp. n. from Germany. Host plant of P. caraganae is Caragana arborescens Lam. Pristiphora dasiphorae (Zinovjev, 1993 (previously known from East Palaearctic and P. cadma Wong & Ross, 1960 (previously known from North America are recorded for the first time from Europe. Nematus nigricans Eversmann, 1847 [= Pristiphora nigricans (Eversmann, 1847, comb. n.], N. breviusculus Eversmann, 1847 [= Euura melanocephalus (Hartig, 1837], and N. caudalis Eversmann, 1847 [= E. caudalis (Eversmann, 1847, comb. n.] are removed from synonymy with P. pallidiventris (Fallén, 1808, N. paralellus Hartig, 1840 [= P. paralella (Hartig, 1840, comb. n.] is removed from synonymy with P. bufo (Brischke, 1883, and P. mesatlantica Lacourt, 1976 is removed from synonymy with P. insularis Rohwer, 1910. The following 29 new synonymies are proposed: P. nigropuncticeps Haris, 2002, syn. n. with P. albitibia (Costa, 1859; Lygaeonematus karvoneni Lindqvist, 1952, syn. n. with P. alpestris (Konow, 1903; P. (P. anivskiensis Haris, 2006, syn. n. with P. appendiculata (Hartig, 1837; Nematus canaliculatus Hartig, 1840, syn. n with P. carinata (Hartig, 1837; P. nigrogroenblomi Haris, 2002, syn. n. with P. cincta Newman, 1837; Tenthredo flavipes Zetterstedt, 1838, syn. n., Nematus congener W.F. Kirby, 1882, syn. n., and P. thomsoni Lindqvist, 1953, syn. n. with P. dochmocera (Thomson, 1871; P. atrata Lindqvist, 1975, syn. n. with P. friesei (Konow, 1904; P. gelida Wong, 1968, syn. n. with P. frigida (Boheman, 1865; Pachynematus nigricorpus Takagi, 1931, syn. n. with P. laricis (Hartig, 1837; Nematus (Pikonema piceae Zhelochovtsev in Zhelochovtsev and Zinovjev, 1988, syn. n. and P. (P. hoverlaensis Haris, 2001, syn. n. with P. leucopodia (Hartig, 1837; Mesoneura

  19. Aspectos biológicos de adultos de um parasitóide do bicudo do algodoeiro Biological aspects of a parasitoid of the cotton boll weevil

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    Lúcia Helena Avelino Araújo

    1999-10-01

    Full Text Available Bracon sp. é um importante agente de controle biológico de Anthonomus grandis (Boheman. Estudaram-se em laboratório, aspectos biológicos de Bracon sp., utilizando-se como hospedeiro larva do bicudo do algodoeiro, a temperatura de 26 ± 2oC, 70 ± 5% UR e fotofase de 12 horas. O ciclo biológico de Bracon sp. teve duração média de 11,7 dias, o período de incubação de 1 dia, o período médio larval de 3,9 dias, com 4 estádios; a viabilidade larval de 98,7%, o período pré-pupal de 0,6 dia, o período pupal de 6,2 dias, o tempo de pré-oviposição de 4,0 dias. A fêmea colocou, em média, 74 ovos em um período de 27,2 dias, a oviposição média diária de 2,7 ovos/fêmea/dia, o período de pós-oviposição de 3,7 dias e a longevidade de Bracon sp. foi de 34 dias para as fêmeas. A informação da biologia deste braconídeo é necessária para desenvolver estratégias de propagação e colonização do parasitóide.Bracon sp. is an important biological control agent of Anthonomus grandis, the cotton Boll weevil. The objective of this work was to evaluate biological aspects of Bracon sp. using cotton Boll weevil larvae as host, at conditions of 26 ± 2oC, with 70 ± 5% RH and 12h photoperiod. The complete life cycle of Bracon sp. was 11.7 days. The incubation period lasted 1.0 day and the larval period 3.9 days with four stages; the viability of the larvae was 98.7%; prepupal period lasted 0.6 day; and the pupal period lasted 6.2 days. Preoviposition period was 4.0 days, and the females laid an average of 74.0 eggs with in an oviposition period of 27.2 days, while the average daily oviposition rate was 2.7 eggs per female per day, posovipositional lasted 3.7 days, and the longevity of Bracon sp. was 34.0 days in females. The information of the biology of this Braconid is needed to develop parasitoid propagation and colonization strategies.

  20. Análisis del Voltinismo y la Diapausa en Poblaciones de Apagomerella versicolor (Coleoptera: Cerambycidae en el Gradiente Latitudinal de su Distribución en la Argentina Voltinism and Diapause in Populations of Apagomerella versicolor (Coleoptera: Cerambycidae in the Distribution of its Latitudinal Gradient

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    Guillermo Logarzo

    2005-12-01

    Full Text Available RESUMEN. Apagomerella versicolor es un cerambícido cuyas larvas barrenan los tallos de plantas compuestas de los géneros Xanthium, Ambrosia y Pluchea (Asteraceae. En la Argentina se distribuye entre los 25º y 39º de LS. Estudios sobre la biología de este insecto realizados con poblaciones de los alrededores de Buenos Aires (35º S, indicaban que era una especie univoltina con diapausa larval durante el invierno y que se podía inducir la salida del estado de diapausa exponiendo las larvas a bajas temperaturas. Sin embargo algunas observaciones sugerían que poblaciones del norte del país podían ser bi o multivoltinas sin diapausa larval. En este trabajo estudiamos el voltinismo y la diapausa en una clina latitudinal entre los 25 y los 32º de LS. Se realizó un ensayo para revelar la presencia de diapausa.en las distintas latitudes, para ello, larvas de distintas latitudes fueron separadas en dos grupos, uno fue expuesto a un tratamiento de bajas temperaturas para romper la diapausa y el otro fue utilizado como control. Aquellas larvas que presentaran diapausa y recibieran un tratamiento de frío deberían empupar más rápidamente que aquellas que no fueron tratadas. Además se realizaron 10 viajes al área de estudio en los meses de enero, marzo, julio, agosto, octubre y diciembre en distintos años donde se revisaron las principales plantas huéspedes: Pluchea sagittalis Cabr. y Xanthium cavanillesii Schouw. Se observaron los estadios inmaduros presentes en las diferentes plantas según la latitud. La evidencia encontrada sugiere que A. versicolor es al menos bivoltina entre los 25 y los 27º de LS y que presenta diapausa en latitudes mayores a los 31º. Se discute la influencia de las plantas huéspedes sobre el voltinismo y la diapausa larval en poblaciones de A. versicolor.ABSTRACT. Apagomerella versicolor (Boheman, a long horn stem-borer beetle of the host genera Pluchea., Xanthium, and Ambrosia (Asteraceae. In Argentina, it occurs