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Sample records for acari tarsonemidae sobre

  1. Ocorrência de Brevipalpus phoenicis (Geijskes (Acari, Tenuipalpidae, Tetranychus urticae (Koch (Acari, Tetranychidae e Polyphagotarsonemus latus (Banks (Acari, Tarsonemidae sobre folhas de Ipomoea cairica (Linnaeus Sweet (Solanales, Convolvulaceae Occurrence of Brevipalpus phoenicis (Geijskes (Acari, Tenuipalpidae, Tetranychus urticae (Koch (Acari, Tetranychidae and Polyphagotarsonemus latus (Banks (Acari, Tarsonemidae on leaves of I. cairica (Linnaeus Sweet (Solanales, Convolvulaceae

    Ozana M. de A. Maia

    2006-09-01

    Full Text Available A ocorrência de três espécies acarinas fitófagas é relatada pela primeira vez sobre folhas de Ipomoea cairica. As espécies Brevipalpus phoenicis (Geijskes, Tetranychus urticae (Koch e Polyphagotarsonemus latus (Banks, foram coletadas sobre folhas de I. cairica nas imediações da Universidade Federal do Paraná, Curitiba, Paraná, Brasil, em 20 de janeiro de 2005.The first occurrence of three phytophagus mites on Ipomoea cairica, is reported. The species Brevipalpus phoenicis (Geijskes, Tetranychus urticae (Koch and Polyphagotarsonemus latus (Banks were caught on leaves of I. cairica, around Universidade Federal do Paraná, Curitiba, Paraná, Brazil, in January 20th, 2005.

  2. Indoor winter fumigation with formic acid for control of Acarapis woodi (Acari: Tarsonemidae) and nosema disease, Nosema sp.

    Underwood, Robyn M; Currie, Robert W

    2009-10-01

    Indoor fumigation of honey bees, Apis mellifera L., with formic acid to control varroa mites, Varroa destructor Anderson & Trueman, allows simultaneous fumigation of multiple colonies with little labor input and good efficacy. Several experiments were designed to test the efficacy of formic acid as a treatment for honey bee mites, Acarapis woodi (Rennie) (Acari: Tarsonemidae), and nosema disease, Nosema sp., indoors in winter. The objectives of this study were (1) to determine the efficacy of formic acid fumigation for honey bee mite control by using both the thoracic slice and live dissection methods and (2) to determine whether indoor fumigation can reliably prevent the buildup of nosema disease in overwintering honey bee colonies. Indoor winter fumigation of honey bee colonies with formic acid was effective in killing a high percentage of honey bee mites but did not significantly reduce the proportion of bees with infested tracheae over the duration of the experiments. Thus, the method used to determine the efficacy of the treatment affected the results. Under conditions of relatively low or decreasing levels of nosema, fumigation tended to suppress the mean abundance of nosema spores relative to the controls. In three separate fumigation experiments using a range of formic acid concentrations, there was no statistical difference between the buildup or maintenance of nosema spore mean abundance over the winter in bees from formic acid fumigated colonies compared with untreated controls. However, fumigation with formic acid during winter at a low concentration for extended periods significantly suppressed spore buildup of mixed populations of nosema (Nosema apis and Nosema ceranae) in 1 yr. PMID:19886435

  3. Evaluación de estrategias de manejo biológico y acaricidas biorracionales en el control de los ácaros Phyllocoptruta oleivora (Ashmead) (Acari: Eriophyidae) Y Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) causales del manchado de frutos en naranja valencia

    Imbachi López, Karol

    2012-01-01

    En la zona Sur Occidental de Colombia, los ácaros P. Latus y P. oleivora, son los responsables de la deformación y el manchado en frutos de naranja Valencia. Con el interés de evaluar el efecto de acaricidas biorracionales sobre estas plagas, se desarrolló este trabajo en un cultivo en producción, en Caicedonia, Valle del Cauca, bajo un diseño de bloques completos al azar con cuatro repeticiones y los tratamientos: abamectina (1.5 cc/l); Paecilomyces fumosoroseus (de 2 cc/l); aceite agrícola ...

  4. Seletividade de produtos fitossanitários sobre o ácaro predador Agistemus brasiliensis Matioli, Ueckermann & Oliveira (Acari: Stigmaeidae Selectivity ofthe pesticides tothe predaceous mite Agistemus brasiliensis Matioli,, Ueckermann & Oliveira (Acari: Stigmaeidae

    Marcos Zatti da Silva

    2009-06-01

    Full Text Available Os ácaros predadores das famílias Phytoseiidae e Stigmaeidae constituem-se nos principais inimigos naturais de Brevipalpus phoenicis (Geijskes em citros. Este ácaro-praga causa sérios prejuízos na produção, devido à transmissão do vírus da leprose dos citros (CiLV. Apesar do grande volume de informações sobre a sensibilidade de ácaros Phytoseiidae a agrotóxicos, praticamente não existem informações sobre o efeito desses compostos em ácaros Stigmaeidae no Brasil. Sendo assim, o trabalho teve por objetivo avaliar o efeito dos principais agrotóxicos utilizados em citros sobre o ácaro predador Agistemus brasiliensis Matioli, Ueckermann & Oliveira (Acari: Stigmaeidae, em condições de laboratório. Arenas de folhas de citros da variedade Pera, contendo 25 fêmeas adultas de A. brasiliensis, foram pulverizadas em torre de Potter. Avaliaram-se as mortalidades dos ácaros 72 horas após a aplicação. O efeito dos produtos na reprodução do acarino e a viabilidade dos ovos também foram avaliados. Quanto à seletividade, conforme proposta da "Organização Internacional para o Controle Biológico" (IOBC, os produtos foram classificados como: classe 1 - inócuo (E99%, calda sulfocálcica, cyhexatin, flufenoxuron, hexythiazox, óxido de fenbutatin, propargite, pyridaben e spirodiclofen. Estudos conduzidos em condições de campo ainda são necessários para se compreender melhor o efeito desses agrotóxicos sobre o ácaro predador.The predaceous mites of the families Phytoseiidae and Stigmaeidae are the most important natural enemies of Brevipalpus phoenicis (Geijskes on citrus. This mite causes serious damages to the yield due to the transmission of Citrus leprosis virus (CiLV. Despite the considerable amount of information on susceptibility of phytoseiids to pesticides, the effect of these compounds is not very known for stigmaeid mites in Brazil. This work was carried out to evaluate the effect of the main pesticides used in

  5. Efeitos do nim sobre tetranychus urticae Koch (Acari: Tetranychidae) e os predadores Phytoseiulus macropilis (Banks) e Neoseiulus californicus (Mcgregor) (Acari: Phytoseiidae)

    Daniele Cristine Hoffmann Schlesener; Adriane Fonseca Duarte; Milton Fernando Cabezas Guerrero; Uemerson Silva da Cunha; Dori Edson Nava

    2013-01-01

    O objetivo deste trabalho foi avaliar a eficiência de controle e os efeitos adversos de dois produtos à base de nim Azamax® (Azadiractina A/B 12g/L) e Neemseto® (Azadiractina A/B, Nimbina e Salanina 2,389 g/L) sobre o ácaro-rajado Tetranychus urticae e os predadores Phytoseiulus macropilis e Neoseiulus californicus em laboratório. Para o ácaro-rajado, foram consideradas as variáveis mortalidade, fecundidade, efeito ovicida e persistência biológica, enquanto para os fitoseídeos consideraram-se...

  6. New species of Daidalotarsonemus and Excelsotarsonemus (Acari: Tarsonemidae) from the Brazilian rainforest including new morphological characters

    Three new species, Daidalotarsonemus oliveirai Rezende, Lofego & Ochoa, sp. nov.,Excelsotarsonemus caravelis Rezende, Lofego & Ochoa, sp. nov. and E. tupi Rezende, Lofego & Ochoa, sp. nov. are described and illustrated. Measurements for these species are provided, as well as drawings, phase contrast...

  7. Larvicidal potencial of Sapindus saponaria (Sapindaceae against Rhipicephalus sanguineus (Latreille, 1806 (Acari: Ixodidae Potencial larvicida de Sapindus saponaria (Sapindaceae sobre Rhipicephalus sanguineus (Latreille, 1806 (Acari: Ixodidae

    F.F. Fernandes

    2007-02-01

    Full Text Available The larvicidal potential of the crude ethanolic extracts (CEE of the stem peel of Sapindus saponaria was evaluated against Rhipicephalus sanguineus. Lethal concentrations (LC, were calculated by preparing CEE solutions at different concentrations in distilled water. Larvae fasted for 14-21 days were utilized in the bioassays, after incubation of engorged females collected from infested environments frequented by dogs in several neighborhoods of Goiânia, GO. Bioassays were performed in a specially constructed biological chamber for testing botanical acaricides, acclimatized to 27±1ºC, RH>80%. The larvae were counted on filter paper envelopes impregnated with the solutions or distilled water and larval mortality observed after 48h. S. saponaria showed good larvicidal activity (LC50 and LC99 of 1994 and 3922ppm, respectively and the results demonstrated its potential as a botanical acaricide and an alternative control measure for R. sanguineus.Avaliou-se a potencialidade larvicida do extrato-bruto etanólico (EBE da casca do caule de Sapindus saponaria sobre Rhipicephalus sanguineus. Para o cálculo das concentrações letais (CL foram preparadas soluções com diferentes concentrações do EBE dissolvido em água destilada. Foram utilizadas larvas em jejum com 14 a 21 dias, obtidas pela incubação de teleóginas, coletadas em ambientes infestados, freqüentados por cães de vários bairros de Goiânia. Os bioensaios foram realizados em uma câmara biológica para testes com acaricidas botânicos, climatizada a 27±1ºC e UR>80%. As larvas foram contidas em envelopes de papel filtro impregnados com as soluções (grupo teste ou com água destilada (grupo-controle e a mortalidade larval foi observada após 48h. S. saponaria demonstrou atividade larvicida satisfatória (CL50 e CL99 respectivamente de 1994 e 3922ppm e os resultados demonstraram seu potencial como acaricida botânico e medida alternativa para o controle de R. sanguineus.

  8. Biología de oligonychus yothersi (mcgregor) (acari: tetranychidae) sobre aguacate persea americana mill. cv. lorena (lauraceae)

    Reyes, Julian C; Mesa, Nora; KONDO, T.

    2012-01-01

    Se estudió la biología del ácaro rojo Oligonychus yothersi en condiciones controladas(26 ± 3°C 56 ± 3% HR), sobre hojas maduras de aguacate, Persea americana Mill. cv.Lorena. Las observaciones se realizaron durante una generación del ácaro. La duraciónde todos los estados, a excepción del adulto, fueron los siguientes: huevo 119.06 horas±13.77 (4.96 días); larva 54.09 horas ± 18.48 (2.25 días), protocrisálida 18.22 ± 9.53(0.76 días), protoninfa 50.62 horas ± 13.29 (2.11 días), deutocrisalida ...

  9. Influence of the webbing produced by Oligonychus ilicis (McGregor) (Acari: Tetranychidae) on associated predatory phytoseiids; Influencia da teia de Oligonychus ilicis (McGregor) (Acari: Tetranychidae) sobre os fitoseideos predadores associados

    Franco, Renato A. [Bioagri Laboratorios Ltda., Piracicaba, SP (Brazil)], e-mail: r.franco@bioagri.com.br; Reis, Paulo R. [Empresa de Pesquisa Agropecuaria de Minas Gerais (EPAMIG), Belo Horizonte, MG (Brazil). Ecocentro], e-mail: paulo.rebelles@epamig.ufla.br; Zacarias, Mauricio S. [EMBRAPA Cafe, Lavras, MG (Brazil)], e-mail: zacarias@epamig.ufla.br; Oliveira, Daniel C. [Universidade Federal de Lavras (UFLA), MG (Brazil)

    2010-01-15

    Oligonychus ilicis (McGregor) is among those mite species that can cause damage to coffee plants (Coffea spp.). Species of Phytoseiidae acari are considered the most important and studied predatory mites. The objective of this study was to evaluate the effects of the webbing produced by O. ilicis on its predation by females of the phytoseiids Iphiseiodes zuluagai Denmark and Muma, Euseius citrifolius Denmark and Muma and Amblyseius herbicolus (Chant). Four bioassays were conducted, with three treatments and ten replicates. Each replicate consisted of 25 O. ilicis per experimental unit (a leaf disc of Coffea arabica) according to the tested developmental stage, in independent experiments. To spin the web, 15 adult females were put on each experimental unit for 24h; females were then removed, leaving only the web, and predators and prey to be tested were introduced. Predation was assessed after 24h. In the presence of webbing, the consumption of eggs, larvae and nymphs by I. zuluagai and eggs and larvae by E. citrifolius was lower. For A. herbicolus, egg predation was lower, but larval predation did not vary significantly and predation of nymphs and adults was higher in the presence of webbing. Predators as a whole were more efficient consuming larvae regardless of the presence of webbing. Considering the stages of O. ilicis altogether, webbing reduced the predation potential of I. zuluagai and E. citrifolius, but not of A. herbicolus. (author)

  10. Toxicidade de natuneem sobre Tetranychus urticae Koch (Acari: Tetranychidae) e ácaros predadores da família Phytoseiidae Toxicity of the natuneem over the Tetranychus urticae Koch (Acari: Tetranychidae) and mites predators from the family Phytoseiidae

    Hilda Maria Brito; Manoel Guedes Corrêa Gondim Junior; José Vargas de Oliveira; Cláudio Augusto Gomes da Câmara

    2006-01-01

    A toxicidade de diferentes concentrações de Natuneem a Tetranychus urticae Koch e a dois ácaros predadores, Euseius alatus De Leon e Phytoseiulus macropilis (Banks), foi estudada. Foi avaliada a toxicidade sobre ovos, e o efeito residual e repelente, sobre adultos. O tratamento dos ovos consistiu na imersão em diluições de Natuneem por cinco segundos, e o efeito residual e repelente sobre adultos consistiu na imersão de discos de folhas de Canavalia ensiformes (L.) DC. também em diluições por...

  11. Selection and characterization of Beauveria spp. isolates to control the broad mite Polyphagotarsonemus latus (Banks, 1904) (Acari: Tarsonemidae).

    Martins, C C; Alves, L F A; Mamprim, A P; Souza, L P A

    2016-01-01

    This study was performed under laboratory conditions to identify isolates of the fungus Beauveria spp. that can control Polyphagotarsonemus latus in the greenhouse and field. Thirty Beauveria spp. isolates were tested by spraying 1 mL conidia (1 × 108 conidia/mL) on pepper leaf discs containing 15 mites. Evaluations were performed on the 3rd and 6th day post application by counting the number of dead mites. Vegetative growth and conidial production were measured from the selected isolates, and bioassays were conducted in the greenhouse on bean seedlings in plastic pots. The isolate Unioeste 53 was selected, and a conidial suspension (1 × 108 conidia/mL) was applied with a backpack sprayer. The evaluation consisted of pre- and post-treatment counts of the number of live mites on ten leaflets in both the plots treated with the fungus and control plots, and the same procedure was followed for the field experiment. In the laboratory, the Unioeste 53 isolate resulted in total and confirmed mortality rates of 70% and 57.7%, respectively. In the greenhouse, the population decreased by 76.71% by the 16th day after application. In the field, the population decreased by 66% by the 12th day after application, demonstrating the potential of this fungus for mite management. PMID:27332672

  12. Efeitos do nim sobre tetranychus urticae Koch (Acari: Tetranychidae) e os predadores Phytoseiulus macropilis (Banks) e Neoseiulus californicus (Mcgregor) (Acari: Phytoseiidae) Effects of neem on tetranychus urticae Koch (Acari: Tetranychidae) and the predators Phytoseiulus macropilis (Banks) and Neoseiulus Californicus (Mcgregor) (Acari: phytoseiidae)

    Daniele Cristine Hoffmann Schlesener; Adriane Fonseca Duarte; Milton Fernando Cabezas Guerrero; Uemerson Silva da Cunha; Dori Edson Nava

    2013-01-01

    O objetivo deste trabalho foi avaliar a eficiência de controle e os efeitos adversos de dois produtos à base de nim Azamax® (Azadiractina A/B 12g/L) e Neemseto® (Azadiractina A/B, Nimbina e Salanina 2,389 g/L) sobre o ácaro-rajado Tetranychus urticae e os predadores Phytoseiulus macropilis e Neoseiulus californicus em laboratório. Para o ácaro-rajado, foram consideradas as variáveis mortalidade, fecundidade, efeito ovicida e persistência biológica, enquanto para os fitoseídeos consideraram-se...

  13. Controle de Brevipalpus phoenicis (Geijskes, 1939 E Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae em cafeeiro e o impacto sobre ácaros benéficos: I - abamectin e emamectin Control of Brevipalpus phoenicis (Geijskes, 1939 and Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae in coffee plants and the impact on beneficial mites: I - Abamectin and emamectin

    Paulo Rebelles Reis

    2004-04-01

    Full Text Available O ácaro Brevipalpus phoenicis (Geijskes, 1939 (Acari: Tenuipalpidae é importante em cafeeiro (Coffea spp., por ser o vetor do vírus da mancha-anular, responsável por queda de folhas e má qualidade da bebida do café, e o ácaro-vermelho, Oligonychus ilicis (McGregor, 1917 (Acari: Tetranychidae, por reduzir a área foliar de fotossíntese. Alguns ácaros da família Phytoseiidae são eficientes predadores associados aos ácaros-praga. Com este trabalho teve-se como objetivo estudar o controle dos ácaros-praga e o impacto do abamectin e emamectin sobre fitoseídeos. Em laboratório, foram estudados os efeitos ovicida, tópico, residual, tópico mais residual aos ácaros-praga e a seletividade fisiológica aos fitoseídeos. Em semicampo, foi estudada a persistência dos produtos no controle dos ácaros-praga. O efeito ovicida foi avaliado em ovos no início e fim de incubação; os efeitos residual, tópico e tópico mais residual foram avaliados pela mortalidade de larvas, ninfas e adultos após 48 horas da aplicação, enquanto a persistência foi avaliada pela mortalidade até 30 dias após a pulverização. A seletividade aos ácaros fitoseídeos foi avaliada pelo efeito total às fêmeas adultas, em teste residual em superfície de vidro. Pelos resultados, verificou-se que abamectin e emamectin não possuem ação ovicida, para ambas as espécies de ácaros-praga estudadas. Considerando o efeito tópico mais residual, o abamectin e emamectin foram altamente eficientes no controle de larvas, ninfas e adultos de B. phoenicis; apenas abamectin foi eficiente no controle de O. ilicis. Abamectin foi levemente a moderadamente nocivo e emamectin mostrou-se inócuo a levemente nocivo aos fitoseídeos. Devido à eficiência de controle e seletividade a fitoseídeos, conclui-se que abamectin e emamectin podem ser utilizados em programas de manejo integrado do ácaro B. phoenicis, e abamectin para o manejo de B. phoenicis e O. ilicis em cafeeiro

  14. Efeito do manejo de plantas daninhas sobre Neoseiulus californicus (Acari:Phytoseiidae) em pomar de macieira Effect of weed management on Neoseiulus californicus (Acari:Phytoseiidae) in apple orchard

    Lino Bittencourt Monteiro; Luiz Belli; Alexander Souza; André Luiz Werner

    2002-01-01

    Avaliou-se a influência do manejo de plantas daninhas sobre o deslocamento de ácaros tetraniquídeos (Panonychus ulmi e Tetranychus urticae) e do ácaro predador Neoseiulus californicus em um pomar de macieira 'Gala', onde foi implantado o controle biológico do ácaro vermelho, P. ulmi, por meio de liberações massais de N. californicus. As parcelas tiveram as plantas daninhas manejadas de três formas: sem manejo, com roçadas manuais e com herbicidas. As populações de ácaros foram avaliadas sobre...

  15. Efeitos do nim sobre tetranychus urticae Koch (Acari: Tetranychidae e os predadores Phytoseiulus macropilis (Banks e Neoseiulus californicus (Mcgregor (Acari: Phytoseiidae Effects of neem on tetranychus urticae Koch (Acari: Tetranychidae and the predators Phytoseiulus macropilis (Banks and Neoseiulus Californicus (Mcgregor (Acari: phytoseiidae

    Daniele Cristine Hoffmann Schlesener

    2013-03-01

    Full Text Available O objetivo deste trabalho foi avaliar a eficiência de controle e os efeitos adversos de dois produtos à base de nim Azamax® (Azadiractina A/B 12g/L e Neemseto® (Azadiractina A/B, Nimbina e Salanina 2,389 g/L sobre o ácaro-rajado Tetranychus urticae e os predadores Phytoseiulus macropilis e Neoseiulus californicus em laboratório. Para o ácaro-rajado, foram consideradas as variáveis mortalidade, fecundidade, efeito ovicida e persistência biológica, enquanto para os fitoseídeos consideraram-se mortalidade e fecundidade. A mortalidade máxima observada para o ácaro-rajado foi de 89,7% e 91,5% para Azamax® e Neemseto®, respectivamente, na concentração de 0,5% após a reaplicação do produto no sétimo dia. Também foram observados efeitos adversos sobre a fecundidade e a viabilidade dos ovos quando tratados com os produtos comerciais (p.c.. A persistência biológica dos produtos foi de aproximadamente três dias após a pulverização. As formulações apresentaram seletividade em relação aos fitoseídeos, porém causaram redução da fecundidade dos mesmos.The aim of the present study was to evaluate the efficiency of control and adverse effects of two neem based products: Azamax TM (Azadirachtin A/B 12g/L and Neemseto TM (Azadirachtin A/B, Nimbin and Salanin 2,389 g/L over two-spotted spider mite Tetranychus urticae and the predators Phytoseiulus macropilis and Neoseiulus californicus in laboratory. Effects over the mortality, fecundity, eggs and biological persistence of the two-spotted spider mite when treated with neem based products were evaluated. For the phytoseiids the effects on mortality and fecundity were evaluated. The maximum mortality of two-spotted spider mites rates observed were 89.7% and 91.5% for Azamax TM and Neemseto TM respectively, on the 0.5% concentration after reapplying the product on the seventh day. Adverse effects were also observed over the fecundity and viability of the eggs when treated with

  16. Field evaluation of neem and canola oil for the selective control of the honey bee (Hymenoptera: Apidae) mite parasites Varroa jacobsoni (Acari: Varroidae) and Acarapis woodi (Acari: Tarsonemidae).

    Melathopoulos, A P; Winston, M L; Whittington, R; Higo, H; Le Doux, M

    2000-06-01

    Neem oil, neem extract (neem-aza), and canola oil were evaluated for the management of the honey bee mite parasites Varroa jacobsoni (Oudemans) and Acarapis woodi (Rennie) in field experiments. Spraying neem oil on bees was more effective at controlling V. jacobsoni than feeding oil in a sucrose-based matrix (patty), feeding neem-aza in syrup, or spraying canola oil. Neem oil sprays also protected susceptible bees from A. woodi infestation. Only neem oil provided V. jacobsoni control comparable to the known varroacide formic acid, but it was not as effective as the synthetic product Apistan (tau-fluvalinate). Neem oil was effective only when sprayed six times at 4-d intervals and not when applied three times at 8-d intervals. Neem oil spray treatments had no effect on adult honey bee populations, but treatments reduced the amount of sealed brood in colonies by 50% and caused queen loss at higher doses. Taken together, the results suggest that neem and canola oil show some promise for managing honey bee parasitic mites, but the negative effects of treatments to colonies and the lower efficacy against V. jacobsoni compared with synthetic acaricides may limit their usefulness to beekeepers. PMID:10902299

  17. Efeito do controle estratégico de Amblyomma cajennense (Fabricius, 1787 (acari: ixodidae sobre a população de Anocentor nitens (Neumann, 1897 (acari: ixodidae em eqüinos Effect of the strategic control of Amblyomma cajennense (Fabricius, 1787 (acari: ixodidae on the population of Anocentor nitens (Neumann, 1897 (acari: ixodidae in equines

    Arildo P. Da Cunha

    2007-12-01

    Full Text Available Objetivou-se avaliar o efeito de um programa de controle estratégico de Amblyomma cajennense sobre a população de Anocentor nitens em eqüinos. Os tratamentos carrapaticidas foram realizados a cada sete dias e divididos em dois módulos, o primeiro com início em abril de 2004 (oito tratamentos e o segundo com início em julho do mesmo ano (cinco tratamentos, utilizando-se a base química piretróide - cipermetrina na concentração de 0,015%. Avaliou-se mensalmente a carga parasitária de A. nitens no pavilhão auricular e divertículo nasal dos eqüinos antes (outubro de 2003 a março de 2004 e depois (outubro de 2004 a março de 2005 do controle estratégico com banhos carrapaticidas. Utilizaram-se escores de 0 a 3 para classificar os níveis de infestação. Entretanto, não houve redução significativa da carga parasitária de A. nitens no pavilhão auricular e no divertículo nasal dos eqüinos, possivelmente, devido a não aplicação sistemática de carrapaticida no divertículo nasal, pois, esta estrutura anatômica é um importante sítio de infestação por A. nitens em eqüinos.The objective of this study was to evaluate the effect of the Amblyomma cajennense strategic control program on the Anocentor nitens population. The acaricide treatments were carried out every seven days and divided in two series, the first one beginning in April 2004 (eight treatments and the second beginning in July of the same year (five treatments, using pyrethroid chemical base - cypermethrin in the concentration of 0,015%. Monthly it was evaluated the infestation of A. nitens in the ear and nasal diverticulum of the equines before (October 2003 to March 2004 and after (October of 2004 to March of 2005 the strategic program of acaricide treatments. It was used score of 0 to 3 to classify the infestation levels. It did not have any significant reduction of the parasitic load of A. nitens in the ear and nasal diverticulum of the equines. Possibly, due

  18. Toxicidade residual de alguns agrotóxicos recomendado na agricultura sobre Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) Residual toxicity of some pesticides recommended for citrus orchards on the predaceous mite Neoseiulus californicus (McGregor) (Acari: phytoseiidae)

    Marcos Zatti da Silva; Caralos Amadeu Leite de Oliveira

    2007-01-01

    O objetivo do trabalho foi avaliar a toxicidade residual de alguns agrotóxicos utilizados em citros sobre Neoseiulus californicus (McGregor) em condições de laboratório. O método de bioensaio adotado foi o de contato residual. Folhas de citros da variedade Pêra, acondicionadas em arenas, foram pulverizadas em torre de Potter. A toxicidade residual dos produtos foi avaliada duas horas e 1; 3; 5; 7; 10; 14 e 21 dias após a aplicação. Em cada arena, foram transferidas dez fêmeas adultas de N. ca...

  19. Atividade in vitro de permetrina, cipermetrina e deltametrina sobre larvas de Rhipicephalus sanguineus (Latreille, 1806 (Acari, Ixodidae In vitro activity of permethrin, cipermethrin and deltamethrin on larvae of Rhipicephalus sanguineus (Latreille, 1806 (Acari, Ixodidae

    F.F. Fernandes

    2000-12-01

    Full Text Available Investigaram-se os efeitos toxicológicos in vitro de três piretróides em diferentes concentrações, formulados para uso pecuário, domiciliar e em cães, sobre larvas de R. sanguineus, objetivando monitorar sua suscetibilidade e fomentar seu controle. Utilizaram-se 1.604 larvas em jejum, com 15 a 21 dias, obtidas por infestação artificial em cão, imersas nas soluções testadas, contidas em dispositivos constituídos por placa de Petri descartável, papel filtro e parafina, mantidas em incubadoras do tipo BOD e observadas ao estereoscópio por 24h. Observaram-se excitabilidade, movimentação repetitiva, diminuição da locomoção, desprendimento, paralisia, "knock-down" e proliferação cuticular de gases e líquidos. A mortalidade na 24ª hora foi de 86,9%, 100,0%, 80,3%, 86,0%, 68,2% e 78,0%, respectivamente, para permetrina 1250ppm e 2500ppm, cipermetrina 150ppm e 300ppm, e deltametrina 25ppm e 50ppm. Não houve mortalidade no grupo controle.Aiming at monitoring the susceptibility, increasing the control and evaluating the toxicological effects, of different concentrations of three pyrethroids were investigated in vitro against Rhipicephalus sanguineus larvae using concentrations formulated for cattle, dogs and household use. A total of 1,604 15-21 day-old fasting larvae, obtained by artificial infestation in dogs, was immersed in the solutions. Larvae were then maintained in BOD incubators inside experimental devices, constituted by disposable Petridishes, filter paper and paraffin, and observed on the stereomicroscope during a 24-hour period. The larvae have shown excitability, repetitive movements, decrease of locomotion, detachment, paralysis, knock-down and production of gases and liquid in the cuticle. Mortality after 24 hours was 86.9% (1250ppm and 100.0% (2500ppm for permethrin; 80.3% (150ppm and 86.0% (300ppm for cipermethrin; and for deltamethrin 68.2% (25ppm and 78.0% (50ppm. Mortality was not observed in the control group.

  20. Toxicidade residual de alguns agrotóxicos recomendado na agricultura sobre Neoseiulus californicus (McGregor (Acari: Phytoseiidae Residual toxicity of some pesticides recommended for citrus orchards on the predaceous mite Neoseiulus californicus (McGregor (Acari: phytoseiidae

    Marcos Zatti da Silva

    2007-04-01

    Full Text Available O objetivo do trabalho foi avaliar a toxicidade residual de alguns agrotóxicos utilizados em citros sobre Neoseiulus californicus (McGregor em condições de laboratório. O método de bioensaio adotado foi o de contato residual. Folhas de citros da variedade Pêra, acondicionadas em arenas, foram pulverizadas em torre de Potter. A toxicidade residual dos produtos foi avaliada duas horas e 1; 3; 5; 7; 10; 14 e 21 dias após a aplicação. Em cada arena, foram transferidas dez fêmeas adultas de N. californicus, juntamente com uma quantidade suficiente de Tetranychus urticae, como fonte de alimento. As avaliações de mortalidade foram realizadas 72 horas após a transferência dos ácaros para as arenas. Os agrotóxicos acrinathrin, deltamethrin, dinocap, enxofre, fenpropathrin, óxido de fenbutatin e propargite não causaram mortalidades significativas em adultos de N. californicus. Foram registradas mortalidades de 29,8; 24,0 e 34,1% para ácaros N. californicus expostos a resíduos de duas horas de idade de abamectim, azocyclotin e cyhexatin, respectivamente. Dicofol, pyridaben e chlorfenapyr causaram 100% de mortalidade aos ácaros predadores expostos aos resíduos tóxicos dos acaricidas, com duas horas de idade. Abamectin provocou mortalidade significativa por um período inferior a um dia. Resíduos dos acaricidas azocyclotin, cyhexatin, dicofol, pyridaben e chlorfenapyr provocaram mortalidades significativas por períodos de 1; 1; 10; 10 e 21dias, respectivamente. Os resultados obtidos no presente experimento servem de subsídio para a escolha adequada dos agrotóxicos a serem utilizados em pomares de citros nos quais N. californicus esteja presente ou naqueles em que o predador venha a ser liberado. Esses resultados também servem para a escolha do momento mais favorável para a liberação dos ácaros predadores dessa espécie no campo, após a aplicação de agrotóxicos nos pomares. Estudos conduzidos em condições de campo ainda s

  1. Efecto de Aceites Esenciales de Lavanda y Laurel sobre el Ácaro Varroa destructor Anderson & Truemann (Acari:Varroidae The Effect of Lavender and Laurel Essential Oils on Varroa destructor Anderson & Truemann (Acari:Varroidae

    Miguel Neira C.

    2004-07-01

    Full Text Available La varroasis es considerada la más seria enfermedad parasitaria de las abejas (Apis mellifera L. y es provocada por el ácaro Varroa destructor Anderson & Truemann. Una gran cantidad de productos han sido probados para el control de esta enfermedad parasitaria. Actualmente se han generado razas resistentes, problemas de contaminación de la miel y de otros productos de la colmena, debido al uso indiscriminado y reiterado de algunos productos contra este ácaro. La tendencia actual es el uso de productos naturales como parte de una estrategia de control integrado. Esta investigación tuvo como objetivo evaluar los efectos de los aceites esenciales extraídos de Lavandula officinalis Chaix y Laurelia sempervirens (Ruiz et Pav. Tul. sobre el ácaro Varroa destructor. La unidad experimental consistió en una jaula con 15 abejas, cada una parasitada con un ácaro. Se emplearon cuatro tratamientos: aceite esencial de lavanda (30%, aceite esencial de laurel (30% acetona pura y un testigo, que recibió agua destilada. Los productos se aplicaron en la jaula, en una cámara climática, con condiciones similares a la colmena. El periodo de evaluación se extendió por 24 h, con intervalos de 1, 3, 5, 8, 14 y 24 h. Ambos aceites esenciales removieron el 100% de los ácaros, sin embargo, el porcentaje de mortalidad de los ácaros fue bajo, 41,67 y 35%, para aceite de lavanda y aceite de laurel, respectivamente.The varroasis is considered the most serious parasitic disease of honey bees (Apis mellifera L.; it is produced by the mite Varroa destructor Anderson & Truemann. A large number of products have been tested for the control of this parasitic disease. Currently, resistant races, problems of contamination of honey and other products of the hive have been generated by the indiscriminate and reiterated use of some products against this mite. The current tendency for its control is the utilization of natural products as part of an integrated control

  2. Atividade do acaricida etoxazol sobre a mortalidade e reprodução do ácaro-da-leprose Brevipalpus phoenicis (Geijskes (Acari: Tenuipalpidae, em citros

    Fernando Juari Celoto

    2010-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a atividade do acaricida etoxazol, no controle e reprodução do ácaro B. phoenicis. Para tanto, foram demarcadas com cola adesiva arenas de cinco centímetros de diâmetro em frutos de citros com alta infestação do ácaro. O ensaio foi delineado em parcelas inteiramente casualizadas, com oito tratamentos e quatro repetições. Em cada arena foram contados o número de ácaros adultos, jovens e ovos. Os tratamentos constaram dos seguintes acaricidas e doses em g i.a./100 L de água: etoxazol 110 SC (1,1; 1,65; 2,75 e 5,5; hexitiazoxi 500 PM (0,75; flufenoxuron 100 CE (3; cihexatina 500 PM (25, aplicados diretamente sobre as arenas. Os frutos foram mantidos em câmara de germinação tipo BOD. com temperatura de 25 ± 2 ºC e fotofase de 12 horas. Diariamente, foram contados o número de ácaros adultos, jovens e ovos, com auxílio de microscópio esteroscópio. Os parâmetros avaliados foram a atividade ovicida, esterilização de fêmeas e efeito sobre formas jovens. Constatou-se que o etoxazol provocou mortalidade de formas jovens do ácaro-da-leprose superior a 95%, nas doses a partir de 1,1 g i.a. /100 L de água. Ovos tratados com etoxazol, nas doses a partir de 1,65 g i.a. /100 L de água, apresentaram inviabilidade média de 60%. O etoxazol apresentou efeito esterilizante sobre fêmeas nas doses a partir de 2,75 g i.a./100 L de água, inviabilizando 95% dos ovos.

  3. Biological aspects of Tetranychus marianae McGregor (Acari, Tetranychidae reared on yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg. leaves Aspectos biológicos de Tetranychus marianae McGregor (Acari, Tetranychidae sobre folhas de maracujazeiro (Passiflora edulis Sims. f. flavicarpa Deg.

    Aloyséia C. da S. Noronha

    2006-06-01

    Full Text Available The passion fruit plant is a host for several different phytophagous mites, mainly those belonging to the Tarsonemidae, Tenuipalpidae and Tetranychidae families. Among the Tetranychidae species are Tetranychus mexicanus (McGregor, 1950 and Tetranychus desertorum Banks, 1900. The occurrence of Tetranychus marianae McGregor, 1950 was detected on yellow passion fruit Passiflora edulis Sims f. flavicarpa Degener plants under field and greenhouse conditions at the headquarters of Embrapa Cassava & Fruits Tropical Research in Cruz das Almas County, State of Bahia, Northeast Brazil. Prior records of T. marianae on the passion fruit crop in Brazil as well as the biological aspects of this species are unknown. The study on the biology of T. marianae on P. edulis f. flavicarpa was carried out under controlled environmental condition of 25 ± 1ºC temperature, 80 ± 10% RH and 12 hours photophase. The egg to adult time span lasted 10.73 ± 0.18 days, with a 92% survival figure. The sexual ratio was 81% females. The mean female longevity was 24.53 days and the daily mean oviposition was 3.69 eggs/female. The intrinsic rate of increase (r m was 0.172; the finite rate of increase (l was 1.187 individuals/female/day; the mean time span of one generation (T was 22.81 days; and the net rate of reproduction (Ro was 50.14.A cultura do maracujazeiro é hospedeira de ácaros fitófagos pertencentes principalmente às famílias Tarsonemidae, Tenuipalpidae e Tetranychidae. Dentre as espécies de tetraniquídeos encontram-se Tetranychus mexicanus (McGregor, 1950 e Tetranychus desertorum Banks, 1900. A ocorrência de Tetranychus marianae McGregor, 1950 foi verificada em plantas de maracujá amarelo Passiflora edulis Sims. f. flavicarpa Degener, em condições de campo e casa de vegetação, na sede da Embrapa Mandioca e Fruticultura Tropical, em Cruz das Almas, BA. O registro de T. marianae na cultura do maracujá no Brasil, assim como os aspectos biológicos dessa esp

  4. Uropodina species from Vietnam (Acari: Mesostigmata)

    Kontschán, J.; Starý, Josef

    -, č. 2807 (2011), s. 1-28. ISSN 1175-5326 Institutional research plan: CEZ:AV0Z60660521 Keywords : Acari * Uropodina * new species Subject RIV: EH - Ecology, Behaviour Impact factor: 0.927, year: 2011

  5. Comparative laboratory toxicity of neem pesticides to honey bees (Hymenoptera: Apidae), their mite parasites Varroa jacobsoni (Acari: Varroidae) and Acarapis woodi (Acari: Tarsonemidae), and brood pathogens Paenibacillus larvae and Ascophaera apis.

    Melathopoulos, A P; Winston, M L; Whittington, R; Smith, T; Lindberg, C; Mukai, A; Moore, M

    2000-04-01

    Laboratory bioassays were conducted to evaluate neem oil and neem extract for the management of key honey bee (Apis mellifera L.) pests. Neem pesticides inhibited the growth of Paenibacillus larvae (Ash, Priest & Collins) in vitro but had no effect on the growth of Ascophaera apis (Olive & Spiltoir). Azadirachtin-rich extract (neem-aza) was 10 times more potent than crude neem oil (neem oil) against P. larvae suggesting that azadirachtin is a main antibiotic component in neem. Neem-aza, however, was ineffective at controlling the honey bee mite parasites Varroa jacobsoni (Ouduemans) and Acarapis woodi (Rennie). Honey bees also were deterred from feeding on sucrose syrup containing > 0.01 mg/ml of neem-aza. However, neem oil applied topically to infested bees in the laboratory proved highly effective against both mite species. Approximately 50-90% V. jacobsoni mortality was observed 48 h after treatment with associated bee mortality lower than 10%. Although topically applied neem oil did not result in direct A. woodi mortality, it offered significant protection of bees from infestation by A. woodi. Other vegetable and petroleum-based oils also offered selective control of honey bee mites, suggesting neem oil has both a physical and a toxicological mode of action. Although oils are not as selective as the V. jacobsoni acaricide tau-fluvalinate, they nonetheless hold promise for the simultaneous management of several honey bee pests. PMID:10826163

  6. Percepção dos produtores de leite do município de Passos, MG, sobre o carrapato Boophilus microplus (Acari: Ixodidae, 2001 Perception of dairy farmers from Passos county, MG, Brazil, concerning the tick Boophilus microplus (acari: ixodidae, 2001

    Christiane Maria Barcellos Magalhães da Rocha

    2006-08-01

    Full Text Available Entrevistas com 25 proprietários de rebanhos com produção diária acima de 500 litros de leite, sorteados da listagem da cooperativa de Passos/MG/Brasil, foram aplicadas para caracterizar suas percepções sobre a biologia do Boophilus microplus e suas atitudes no controle de carrapatos. A maioria desses produtores tem pelo menos o ensino médio completo e está na atividade há mais de dez anos. Os prejuízos biológicos produzidos pelos carrapatos são bem percebidos por eles; porém, não demonstraram conhecimento sobre a biologia do B. microplus e as desvantagens dos banhos carrapaticidas, principalmente com relação aos riscos toxicológicos. Esses produtores realizam controle de carrapatos sem critérios técnicos e com alta freqüência, baseando-se na avaliação subjetiva da infestação nos animais. Isto favorece o estabelecimento da resistência aos acaricidas e demonstra que a transferência de tecnologia sobre controle de carrapatos para o setor pecuário é falha.Twenty five dairy farms were randomly chosen from all farms producing more than 500 liters of milk/ day in Passos, MG, Brazil. The owners were interviewed to characterize their perceptions about the biology of B. microplus and their attitudes towards tick control. Most of the producers have a college degree and more than six year-experience in the activity. The biological damages caused by ticks are perceived by the farmers. Their tick control is performed without technical criteria and they did not show a proper knowledge on the biology of B. microplus nor on the toxicological risks of acaricides application. The results reveal a gap between the technology and farmers, favoring tick resistance to acaricides.

  7. Atividade do acaricida etoxazol sobre a mortalidade e reprodução do ácaro-da-leprose Brevipalpus phoenicis (Geijskes (Acari: Tenuipalpidae, em citros Activity of the etoxazole acaricide on the mortality and reproduction of the citrus leprosis mite Brevipalpus Phoenicis (Geijskes (Acari: Tenuipalpidae, in citrus

    Fernando Juari Celoto

    2010-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a atividade do acaricida etoxazol, no controle e reprodução do ácaro B. phoenicis. Para tanto, foram demarcadas com cola adesiva arenas de cinco centímetros de diâmetro em frutos de citros com alta infestação do ácaro. O ensaio foi delineado em parcelas inteiramente casualizadas, com oito tratamentos e quatro repetições. Em cada arena foram contados o número de ácaros adultos, jovens e ovos. Os tratamentos constaram dos seguintes acaricidas e doses em g i.a./100 L de água: etoxazol 110 SC (1,1; 1,65; 2,75 e 5,5; hexitiazoxi 500 PM (0,75; flufenoxuron 100 CE (3; cihexatina 500 PM (25, aplicados diretamente sobre as arenas. Os frutos foram mantidos em câmara de germinação tipo BOD. com temperatura de 25 ± 2 ºC e fotofase de 12 horas. Diariamente, foram contados o número de ácaros adultos, jovens e ovos, com auxílio de microscópio esteroscópio. Os parâmetros avaliados foram a atividade ovicida, esterilização de fêmeas e efeito sobre formas jovens. Constatou-se que o etoxazol provocou mortalidade de formas jovens do ácaro-da-leprose superior a 95%, nas doses a partir de 1,1 g i.a. /100 L de água. Ovos tratados com etoxazol, nas doses a partir de 1,65 g i.a. /100 L de água, apresentaram inviabilidade média de 60%. O etoxazol apresentou efeito esterilizante sobre fêmeas nas doses a partir de 2,75 g i.a./100 L de água, inviabilizando 95% dos ovos.The objective of this work was to evaluate the activity of the etoxazole acaricide, on the mortality and reproduction of the citrus leprosies mite, B. phoenicis. A five centimeter diameter arena were demarcated with adhesive glue, in citrus fruits with high infestation of the mite. The design was entirely randomized plots with eight treatments and four replications. In each arena were counted the number of adults, young and eggs of B. phoenicis. The treatments consisted the following acaricides and doses in g a.i./100 L of water: etoxazole

  8. Controle de Brevipalpus phoenicis (Geijskes, 1939 e Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae em cafeeiro e o impacto sobre ácaros benéficos: II - Spirodiclofen e Azocyclotin Control of Brevipalpus phoenicis (Geijskes, 1939 and Oligonychus ilicis (McGregor, 1917 (Acari: Tenuipalpidae, Tetranychidae in coffee plants and the impact on beneficial mites: II - Spirodiclofen and Azocyclotin

    Paulo Rebelles Reis

    2005-06-01

    Full Text Available O ácaro Brevipalpus phoenicis (Geijskes é importante em cafeeiro (Coffea spp. por ser o vetor do vírus da mancha-anular, doença responsável por queda de folhas e má qualidade da bebida do café, e o ácaro-vermelho Oligonychus ilicis (McGregor por reduzir a área foliar de fotossíntese. Ácaros da família Phytoseiidae, de várias espécies, são eficientes predadores associados aos ácaros-praga. Conduziu-se este trabalho com o objetivo de estudar o controle dos ácaros-praga com spirodiclofen e azocyclotin, e o impacto sobre fitoseídeos. Em laboratório foram estudados os efeitos ovicida, tópico, residual, tópico mais residual e a seletividade fisiológica aos fitoseídeos; em casa-de-vegetação foi avaliada a persistência no controle às duas espécies de ácaros-praga; e em campo foi avaliada a eficiência apenas no controle de B. phoenicis. Os bioensaios foram realizados em arenas de folhas destacadas. O efeito ovicida foi avaliado em ovos no início e final de incubação. Os efeitos residual, tópico e tópico mais residual foram avaliados pela mortalidade de larvas, ninfas e adultos aos oito dias, e a persistência até 30 dias após a aplicação. A seletividade aos fitoseídeos foi avaliada, pelo efeito na mortalidade e reprodução de fêmeas adultas, em teste residual em superfície de vidro. Spirodiclofen e azocyclotin (SC mostraram eficiente ação ovicida, principalmente para ovos de B. phoenicis no início de incubação. Para ovos de O. ilicis, somente o spirodiclofen apresentou efeito ovicida. Em geral, os efeitos tópico e residual associados melhoraram a eficiência dos produtos no controle das fases pós-embrionárias de ambas as espécies. O spirodiclofen apresentou seletividade aos ácaros predadores, já o azocyclotin foi nocivo. Em campo, ambos os acaricidas mostram-se altamente eficientes na redução de todas as fases pós-embrionárias do ácaro B. phoenicis, principalmente nas folhas.The mite Brevipalpus

  9. New Oppioidea taxa from Madagascar (Acari: Oribatida

    Mahunka, S.

    2012-07-01

    Full Text Available Within the framework of the continuous survey of the Madagascan Oribatida Fauna some newly surveyed Oppioidea (Acari: Oribatida species are discussed. Altogether 15 species are listed of the recently studied, identified and described taxa originating from several sites of the island (Malagasy Republic. Seven species of them are new to science and some other known only from few localities. One species represents also a new genus, Interbelba gen. nov. Three species, Berniniella bicarinata (Paoli, 1908, Quadroppia circumita (Hammer, 1961 and Discosuctobelba variosetosa (Hammer, 1961are recorded from Madagascar for the first time. With 22 figures.

  10. Study of Acari and Collembola Populations in Four Cultivation Systems in Dourados - MS

    Rosilda Mara Mussury

    2002-09-01

    Full Text Available The impact four cultivation systems on the soil fauna was studied, using Oribatida and Gamasida acarids as bioindicators and collembolan. The research was carried out in experimental fields, located in EMBRAPA - CPAO in Dourados, Centerwest of Brazil from July 1997 to December 1999. The constant pasture system presented smaller impact on the soil fauna followed by agricultural cattle rotation and a direct plantation system. In the conventional plantation series, the populational density of the mesofauna organisms was low, especially collembolan families.O impacto de quatro sistemas de cultivo sobre a fauna de solo foram estudados, utilizando-se como bioindicadores os acari Oribatida e Gamasida e os Collembola. A pesquisa foi conduzida em campos experimentais, localizados na EMBRAPA - CPAO no município de Dourados, MS, no período de julho de 1997 à dezembro de 1999. O sistema de pastagem contínua apresentou menor impacto sobre a fauna de solo seguido da rotação agricultura pecuária e do sistema de plantio direto. Nas sucessões do plantio convencional, a densidade populacional dos organismos da mesofauna foi baixa, em especial as famílias de colembolos.

  11. Two new Uropodina species from Ethiopia (Acari: Mesostigmata)

    Kontschán, J.; Starý, Josef

    2013-01-01

    Roč. 54, č. 1 (2013), s. 49-56. ISSN 1681-5556 Institutional research plan: CEZ:AV0Z60660521 Institutional support: RVO:60077344 Keywords : Acari * Uropodina * Afrotropical * Ethiopia * new species * new synonymy Subject RIV: EG - Zoology Impact factor: 0.500, year: 2013

  12. New Uropodina species and records from Malaysia (Acari: Mesostigmata)

    Kontschán, J.; Starý, Josef

    2012-01-01

    Roč. 58, č. 2 (2012), s. 177-192. ISSN 1217-8837 Institutional research plan: CEZ:AV0Z60660521 Keywords : Acari * new records * new species * Malaysia Subject RIV: EH - Ecology, Behaviour Impact factor: 0.472, year: 2012

  13. Biologia e flutuação populacional de Mononychellus Planki (Mc Gregor) (Acari: Tetranychidae) em cultivares de soja Glycine Max (L.) Merr. e impacto do imidacloprido em aspectos biológicos do adulto.

    Siqueira, Fabio

    2012-01-01

    Resumo: Visando buscar cultivares de soja Glycine max (L.) Merr. com fatores de resistência ao ácaro verde Mononychellus planki (McGregor) (Acari: Tetranychidae) foram realizados estudos sobre a biologia em laboratório, flutuação populacional em diferentes cultivares durante duas safras e possíveis ações de agrotóxicos no crescimento populacional. Inicialmente foram realizados estudos de biologia de imaturos em dez cultivares BRS 133, BRS 134, BRS 282, BRS 284, BRS 245 RR, BMX Titan RR, IAC 1...

  14. Neoseiulus fallacis (Garman) (Acari: Phytoseiidae) as a potential biological control agent for spider mites (Acari: Tetranychidae) in Virginia vineyards

    Metzger, Jessica A.

    2001-01-01

    Outbreaks of spider mites (Acari: Tetranychidae) in vineyards have been increasing with the expansion of the industry in Virginia. Only three effective acaricides are registered on grapes and as resistance begins to occur, control options are limited. Biological control of spider mites by inoculative or inundative releases of predatory mites has been tried on a wide range of crops including grapes. This project examined the feasibility of using Neoseiulus fallacis (Acari: Phytoseiidae) as ...

  15. A new species of Brevipalpus Donnadieu (Acari: Tenuipalpidae) and key to the Egyptian species.

    Halawa, Alaa M; Fawzy, Magdy M

    2014-01-01

    A new species, Brevipalpus noranae sp. nov. (Acari: Tenuipalpidae) is described and illustrated from females collected on Malus domestica Borkh and Citrus aurantium L. A key to the species of the genus Brevipalpus present in Egypt is provided. PMID:24869810

  16. Three new .i.Trachyuropoda./i. (Acari: Uropodina: Trachyuropodidae) species from the Neotropical region

    Kontschán, J.; Starý, Josef

    2013-01-01

    Roč. 37, č. 1 (2013), s. 7-14. ISSN 1300-0179 Institutional support: RVO:60077344 Keywords : Acari * Uropodina * Trachyuropoda * Galápagos Islands Subject RIV: EG - Zoology Impact factor: 0.585, year: 2013

  17. Temperature-dependent development and reproductive traits of Tetranychus macfarlanei (Acari: Tetranychidae)

    Ullah, Mohammad Shaef; Haque, Md. Ahsanul; Nachman, Gösta;

    2012-01-01

    Development and reproductive traits of Tetranychus macfarlanei Baker & Pritchard (Acari: Tetranychidae) were investigated on kidney bean, Phaseolus vulgaris L., at eleven constant temperatures. Tetranychus macfarlanei was able to develop and complete its life cycle at temperatures ranging from 17...

  18. Primeiro registro de Tetranychus urticae (Acari: Tetranychidae) em mudas de teca no Brasil

    Alexandre dos Santos; Vagner Aniceto Teixeira; Otávio Peres Filho; Milson Evaldo Serafin; Marçal Pedro Neto; Carlos Alberto da Cunha Oliveira

    2014-01-01

    O ácaro fitófago Tetranychus urticae (Kock, 1836) (Acari: Tetranychidae) foi relatado e suas injúrias caracterizadas pela primeira vez em viveiro de produção mudas de teca (Tectona grandis) no Brasil.

  19. Eupalopsellus prasadi Bagheri and Khanjani 2009 (Acari: Prostigmata, Eupalopsellidae), a New record for the Turkish acaro fauna

    KASAP, İsmail; Çobanoğlu, Sultan; PEHLİVAN, SERKAN; KÖK, Şahin

    2013-01-01

    Females of Eupalopsellus prasadi Bagheri and Khanjani 2009, (Acari: Eupalopsellidae) were collected from the colony of Tetranychus urticae Koch (Acari: Tetranychidae) which are harmful on grown apple trees (Malus domestica Borkh. (Rosaceae)) in Bigalı village at Eceabat, Çanakkale. This is a new record for the Turkish fauna.

  20. Eriophyoid mites from Northeast China (Acari: Eriophyoidea).

    Xue, Xiao-Feng; Guo, Jing-Feng; Hong, Xiao-Yue

    2013-01-01

    We describe and illustrate herein one new genus and eighteen new eriophyoid mite species (Acari: Eriophyoidea) collected in northeast China. They are: Shevtchenkella huzhongiensis sp. nov. on Ulmus davidiana Planch. var. japonica (Sarg. ex Rehder) Nakai (Ulmaceae), Shevtchenkella jingboicus sp. nov. on Acer sp. (Aceraceae), Calepitrimerus flexuosus sp. nov. on Spiraea flexuosa Fisch. ex Cambess. (Rosaceae), Calepitrimerus maximowiczii sp. nov. on Crataegus maximowiczii Schneid. (Rosaceae), Calepitrimerus pilosus sp. nov. on Agrimonia pilosa Ledeb. (Rosaceae), Calepitrimerus yichunensis sp. nov. on Sorbaria sorbifolia (L.) A.Br. (Rosaceae), Cupacarus oxyphyllus sp. nov. on Euonymus oxyphyllus Miq. (Cel-astraceae), Epitrimerus sambucus sp. nov. on Sambucus williamsii Hance (Caprifoliaceae), Epitrimerus wuyingensis sp. nov. on Acer sp. (Aceraceae), Longisolenidionus amurensis gen. nov & sp. nov. on Tilia amurensis Rupr. (Tiliaceae), Phyllocoptes jiagedaqiensis sp. nov. on Cunninghamia sp. (Taxodiaceae), Aculops huzhongensis sp. nov. on Salix sp. (Sali-caceae), Aculus huzhongsalixus sp. nov. on Salix sp. (Salicaceae), Tetra angelica sp. nov. on Angelica sp. (Apiaceae), Tetra jiagedaqia sp. nov. on Lespedeza sp. (Fabaceae), Vittacus mandshurica sp. nov. on Corylus sieboldiana Blume var. mandshurica (Maxim.) C. K. Schneid. (Betulaceae), Vittacus cannabus sp. nov. on Cannabis sativa L. (Moraceae), and Peralox dentatis sp. nov. on Ulmus sp. (Ulmaceae). Two species formerly assigned to Rhyncaphytoptus, R. abiesis (Xue, Song & Hong, 2006) and R. fabris (Xue, Song & Hong, 2006) were reassigned to Nalepella, based on the presence of seta vi on the apical shield, and other characteristics of Nalepella. One species formerly assigned to Rhyncaphytoptus, R. fargesis (Xue, Song & Hong, 2006) was reassigned to Pentaporca, based on the presence of seta vi on the apical shield, opisthosoma with five ridges and other characteristics of Pentaporca. At the same time, four new eriophyoid

  1. Mites and ticks (Acari. Chapter 7.4

    Maria Navajas

    2010-07-01

    Full Text Available The inventory of the alien Acari of Europe includes 96 species alien to Europe and 5 cryptogenic species. Among the alien species, 87 are mites and 9 tick species. Besides ticks which are obligate ectoparasites, 14 mite species belong to the parasitic/predator regime. Among these species, some invaded Europe with rodents (8 spp. and others are parasitic to birds (2 spp. The remaining 77 mite species are all phytophagous and among these 40% belong to the Eriophyidae (37 spp. and 29% to the Tetranychidae (27 spp. families. These two families include the most significant agricultural pest. The rate of introductions has exponentially increased within the 20th century, the amplification of plant trade and agricultural commodities movements being the major invasion pathways. Most of the alien mite species (52% are from North America, Asia (25%, and Central and South America (10%. Half of the ticks (4 spp. alien to Europe originated from Africa. Most of the mite species are inconspicuous and data regarding invasive species and distribution range is only partially available. More research is needed for a better understanding of the ecological and economic effects of introduced Acari.

  2. Mites (Arachnida, Acari on Citrus sinensis L. Osbeck orange trees in the state of Amazonas, Northern Brazil Ácarofauna de Citrus sinensis L. Osbeck no estado do Amazonas, Brasil

    Teiamar da Encarnação Bobot

    2011-01-01

    Full Text Available Despite the importance of citriculture in Brazil, very little is known about mite populations in citrus crops in the Northern Region. In the municipality of Manaus, 12 sprayed sweet orange orchards were surveyed every two weeks during seven months to record mite species amount, and to describe the abundance and distribution of the most important species. The size and age of the orchards varied from 3,360 to 88,080 m² and seven to 25 years, respectively. In the fourteen sampling period, leaves, twigs and fruits were collected from 12 trees, one per orchard. In total, 3,360 leaves, 672 twigs and 1,344 fruits were sampled from 168 trees. Mites were manually extracted from the fruits, and by the washing method on leaves and twigs. We identified pests with the potential to cause economic loss. Fourteen species of phytophagous and mycophagous mites from Eriophyidae, Tarsonemidae, Tenuipalpidae, and Tetranychidae were recorded. Brevipalpus phoenicis (Geijskes 1939 and Phyllocoptruta oleivora (Ashm., 1879, the two commonest phytophagous mites in other Brazilian regions were dominant, showing that local orchards are susceptible to their infestation. Eleven predatory mites were recorded, comprising 10% of the mite population, belonging to Phytoseiidae and Ascidae. Phytoseiidae was the richest family, with ten species. The results are discussed in relation to the temporal variation aspects and habitat use of the most important species. Long-term research encompassing chemical applications followed by evaluations of the mite community are necessary for a better management of the orchards, taking into consideration the seasonal phenology of key pests.Apesar da importância da citricultura no Brasil, pouco se conhece sobre as populações de ácaros em plantações de citros no norte do país. No município de Manaus, 12 pomares de laranja doce pulverizados foram avaliados a cada duas semanas, durante sete meses, para o registro de ácaros plantícolas e

  3. The complete mitochondrial genome of Tetranychus truncatus Ehara (Acari: Tetranychidae).

    Chen, Da-Song; Jin, Peng-Yu; Hong, Xiao-Yue

    2016-01-01

    The complete mitochondrial genome of Tetranychus truncatus Ehara (Acari: Tetranychidae) is a typical circular DNA with length of 13,089 bp (GenBank accession number: KM111296). The genome contains all 13 protein-coding genes (PCGs), an A + T-rich region, two rRNA genes and 22 tRNA genes. The A + T content of the mitochondrial genome is 84.5%. The AT-skew is positive (0.032) while the GC-skew is negative (-0.058). The gene arrangement is conserved in T. urticae, Panonychus citri and P. ulmi which are in the same family (Tetranychidae). The A + T-rich region is only 43 bp in length with high A + T content (97.7%). All the PCGs start with typical ATD codons. Eight PCGs have complete TAA stop codons, while five PCGs have an incomplete stop codon (T). PMID:25162745

  4. The complete mitochondrial genome of the scab mite Psoroptes cuniculi (Arthropoda: Arachnida) provides insights into Acari phylogeny

    Gu, Xiao-Bin; Liu, Guo-Hua; Song, Hui-Qun; Liu, Tian-Yu; Yang, Guang-You; Zhu, Xing-Quan

    2014-01-01

    Background Limited available sequence information has greatly impeded population genetics, phylogenetics and systematics studies in the subclass Acari (mites and ticks). Mitochondrial (mt) DNA is well known to provide genetic markers for investigations in these areas, but complete mt genomic data have been lacking for many Acari species. Herein, we present the complete mt genome of the scab mite Psoroptes cuniculi. Methods P. cuniculi was collected from a naturally infected New Zealand white ...

  5. Investigations of Gamasina mites in natural and man-affected soils in Latvia (Acari: Mesostigmata)

    Salmane, I.

    2003-01-01

    Investigations of Gamasina mites in natural and man-affected soils in Latvia (Acari: Mesostigmata) A short overview is presented on Gamasina material collected in 22 natural and man-disturbed habitats in Latvia. Species diversity, average density and species dominance were investigated. Altogether 1

  6. A new pomegranate pest for Turkey; Pomegranate false spidermite, Tenuipalpus punicae Pirtchard and Baker (Acari: Tenuipalpidae)

    DÖKER, İsmail; KAZAK, Cengiz; KARUT, Kamil

    2013-01-01

    In this study, the pomegranate false spider mite Tenuipalpus punicae Pirtchard and Baker (Acari: Tenuipalpidae) collected from pomegranate growing areas of Adana province is determined for the first record for Turkish mite fauna. Some information related to world distribution, damage, biology and control of this pest are presented in the paper.

  7. Stigmaeus ceylani, a new species of the genus Stigmaeus Koch (Acari: Stigmaeidae) from Turkey

    Uluçay, İsmail

    2015-01-01

    In this study a new species of Stigmaeus Koch (Acari: Stigmaeidae), Stigmaeus ceylani sp. nov., is described and illustrated. Specimens have been collected from the soil and litter under Punica granatum, 2014, İskenderun, Hatay, Turkey. Besides, the male, female, deutonymph, protonymph and larva of the species are illustrated in this article.  

  8. Primeiro registro de Tetranychus urticae (Acari: Tetranychidae em mudas de teca no Brasil

    Alexandre dos Santos

    2014-07-01

    Full Text Available O ácaro fitófago Tetranychus urticae (Kock, 1836 (Acari: Tetranychidae foi relatado e suas injúrias caracterizadas pela primeira vez em viveiro de produção mudas de teca (Tectona grandis no Brasil.

  9. Recharacterization of Gymnodamaeoidea and erection of Plateremaeoidea (Acari, Oribatei), with key to families and genera

    Adilson D. Paschoal

    1989-01-01

    The present paper deals with the recharacterization of the Gymnodamaeoidea and the erection of Plateremaeoidea n. grad. (Acari, Oribatei). Gymnodamaeidae Grandjean, Aleurodamaeidae Paschoal & Johnston, and Idiodamaeidae Paschoal are recognised under the Gymnodamaeoidea. Plateremaeidae Tragardh, Pheroliodidae Paschoal, Nooliodidae Paschoal, Hammeriellidae Paschoal, Lyrifissellidae Paschoal, Pedrocortesellidae Paschoal, Licnodamaeidae Grandjean and Licnobelbidae Grandjean are included in Plater...

  10. Five New Records of Raphignathoid Mites (Acari: Raphignathoidea from Poland/ Pięć Nowych Gatunków Roztoczy Z Nadrodziny Raphignathoidea (Acari Stwierdzonych W Faunie Polski

    Doðan Salih

    2014-12-01

    Full Text Available Pięć nowych gatunków roztoczy (Acari: Raphignathoidea zostało odnoto- wanych jako nowe dla fauny Polski: trzy z rodziny Stigmaeidae, Eustigmaeus rhodomela (Koch, Mediolata obtecta Dónel et Doóan, Stigmaeus glabrisetus Summers, jeden z rodziny Cryptognathidae, Favognathus cucurbita (Berlese, i jeden z rodziny Barbutiidae, Barbuda anguineus (Berlese. Ostatni z wymienio- nych jest jednocześnie pierwszym stwierdzeniem przedstawiciela rodziny Barbutiidae w Polsce.

  11. Garrapatas (Acari: Ixodidae) asociadas a perros en diferentes ambientes de la provincia de Corrientes, Argentina Ticks (Acari: Ixodidae) of dogs in different environments of the Corrientes Province, Argentina

    V.N. Debárbora; E.B. Oscherov; A.A. Guglielmone; Nava, S.

    2011-01-01

    Se estudiaron las garrapatas (Acari: Ixodidae) de perros en ambientes urbanos, periurbanos y rurales de la provincia de Corrientes por medio de colecciones mensuales durante un año en siete sitios diferentes. De los 138 perros examinados, en 87 (63,04%) se determinaron tres especies de garrapatas: Amblyomma tigrinum (n=35), Amblyomma ovale (n=2) y Rhipicephalus sanguineus sensu lato (n=523). Las mayores prevalencias para A. tigrinum y R. sanguineus s.l. fueron halladas en ambientes rurales. E...

  12. Seletividade de agrotóxicos usados na cultura da macieira a Neoseiulus Californicus (McGregor (Acari: Phytoseiidae1 Pesticide selectivity used in apple crops Neoseiulus californicus (McGregor (Acari: Phytoseiidae

    Geraldine de Andrade Meyer

    2009-06-01

    Full Text Available Objetivou-se avaliar os efeitos secundários dos principais agrotóxicos utilizados em macieira sobre adultos e imaturos de Neoseiulus californicus (McGregor (Acari: Phytoseiidae. Os testes foram conduzidos em laboratório, utilizando as doses dos produtos recomendadas para a cultura e o método de contato e residual com pulverização em superfície de folha. Foram testados tebufenozida, fosmete, metidationa, clorpirifós, abamectina, fenpiroximato, piridabem, captana, mancozebe (duas dosagens e ditianona. Para o cálculo do efeito total (E% sobre os adultos, avaliaram-se a mortalidade, a oviposição e a viabilidade dos ovos, e para os imaturos, somente a mortalidade. Os resultados do E% foram avaliados 96 horas após a pulverização. Os produtos foram classificados quanto ao efeito total (E% de toxicidade proposta pela IOBC/WPRS. Fosmete, tebufenozida e metidationa foram inócuos; abamectina, fenpiroximato, clorpirifós, captana, mancozebe (nas duas dosagens testadas e ditianona foram levemente nocivos, e piridabem foi moderadamente nocivo aos adultos de N. californicus. O fungicida mancozebe, na maior dosagem (320g,i.a./100L, foi o que mais afetou o ácaro predador. Quanto à seletividade dos agrotóxicos aos imaturos, constatouse que abamectina e piridabem foram moderadamente nocivos, e os demais foram inócuos. Nenhum produto foi classificado como nocivo, evidenciando a tolerância de N. californicus a estes agrotóxicos. Estes resultados permitem uma escolha e manejo mais adequado para os agrotóxicos utilizados nos pomares comerciais de macieira, de forma que a presença deste ácaro predador exerça pressão de controle do ácaro-vermelho.The objective of this study was to evaluate the side effects of the main pesticides used in adult and immature Neoseiulus californicus (McGregor (Acari: Phytoseiidae. The tests were carried out in the laboratory by using the contact and residual spraying method on the leaf surface. It was tested

  13. New Wolbachia supergroups detected in quill mites (Acari: Syringophilidae).

    Glowska, Eliza; Dragun-Damian, Anna; Dabert, Miroslawa; Gerth, Michael

    2015-03-01

    Wolbachia is the most abundant intracellular bacterial genus infecting a wide range of arthropods and filarial nematodes. Wolbachia have evolved parasitic, mutualistic and commensal relationships with their hosts but in arthropods generally act as reproductive parasites, inducing a wide range of phenotypic effects such as cytoplasmic incompatibility, parthenogenesis, feminization and male-killing. Up to now, the genus has been divided into 14 supergroups successively named A-O. Here, we describe two new Wolbachia supergroups from syringophilid mites (Acari: Cheyletoidea). These obligatory ectoparasites of birds inhabit the quills of feathers in many avian groups. The species of this family reproduce in a haplodiploid mode sensu arrhenotoky and are usually strongly female-biased. Based on the sequences of four protein-coding genes (ftsZ, gltA and groEL and coxA) and the 16S rRNA we identified strains of three Wolbachia supergroups (F and two distinct, yet undescribed ones) in five quill mite species. Our results suggest that in some cases the distribution of the bacteria can be better correlated with the mite's bird host rather than with mite taxonomy as such. The discovery of two new Wolbachia supergroups not only broadens the knowledge of the diversity of this bacterium but also raises questions about potential effects induced in quill mites and transmission mechanisms of the endosymbionts in this peculiar bacteria-quill mite-bird system. PMID:25541519

  14. Molecular analysis of Boophilus spp. (Acari: Ixodidae) tick strains.

    Fuente, J; García-García, J C; González, D M; Izquierdo, G; Ochagavia, M E

    2000-10-01

    Boophilus spp. (Acari: Ixodidae) parasitize cattle and other farm and wild animals in tropical and subtropical regions of the world. Ticks belonging to the genus Boophilus have undergone evolutionary processes associated with habitat adaptation following biogeographical separation, resulting in strains with marked morphological differences. We have characterized at the molecular level B. microplus strains from Latin America and Australia, employing sequences derived from the bm86 coding region, an intron located within the bm86 gene, and DNA short tandem repeats (STR). A B. annulatus strain was employed for comparison. The results indicated that variation within the bm86 coding region is higher between B. microplus strains than between some B. microplus strains and B. annulatus. The sequence of the intron was not informative for phylogenetic analysis, varying among individuals of the same strain. Two STRs were identified in B. microplus (STRs BmM1 and BmM2) and one in B. annulatus (STR Ba1). Southern hybridization experiments with STRs BmM1 and BmM2 as a probe revealed the prevalence of dispersed moderately repeated DNA in the genome of B. microplus. The analysis of polymorphism at STR locus BmM1 evidenced differences within and between populations of B. microplus. These results support at the molecular level the existing differences between B. microplus strains and suggest tools to characterize these populations. PMID:10962158

  15. Ocorrência do ácaro fitófago Catarhinus tricholaenae Keifer (Acari: Diptilomiopidae em cultivares de milho Bt Occurrence of the phytophagous mite Catarhinus tricholaenae Keifer (Acari: Diptilomiopidae on Bt corn cultivars

    Marcos Antônio Matiello Fadini

    2012-09-01

    Full Text Available O objetivo deste trabalho foi avaliar a ocorrência do microácaro-da-face-inferior-das-folhas-de-milho Catarhinus tricholaenae Keifer (Acari: Diptilomiopidae em cultivares transgênicas de milho, contendo as proteínas Cry1F e Cry 1 A(b e milho não Bt. Durante o período de junho de 2010 a janeiro de 2011, foram coletadas, quinzenalmente, cinco amostras aleatórias de quatro folhas em talhões de milho Bt, contendo a proteína Cry 1F e Cry 1 A(b, e de milho não Bt em áreas experimentais da Embrapa Milho e Sorgo, em Sete Lagoas, MG. As amostras de folhas foram vistoriadas por 15 minutos na região da nervura central, em busca de adultos de C. tricholaenae. Foram registrados 2.930 indivíduos de C. tricholaenae, sendo que 1.114 no milho Bt Cry 1F, 753 em Cry 1 A(b e 1063 indivíduos em folhas das cultivares não Bt. As maiores abundâncias populacionais médias ocorreram nos meses de novembro e dezembro. Os fatores estágio fenológico das plantas e precipitação afetaram positivamente a abundância de C. tricholaenae. A abundância média do período de coleta de C. tricholaenae foi reduzida pela cultivar de milho contendo a proteína Cry 1 A(b. Esse é o primeiro registro de ácaros sobre cultivares de milho transgênico no Brasil.The objective of this study was to evaluate the occurrence of "microácaro-da-face-inferior-das-folhas-de-milho" Catarhinus tricholaenae Keifer (Acari: Diptilomiopidae on transgenic cultivars of corn containing proteins Cry1F and Cry 1 A (b and non-Bt corn. During the period from June 2010 to January 2011 were collected, every two weeks, five random samples of four leaves in plots of Bt corn containing the protein Cry 1F and Cry 1 A (b and non-Bt corn in the experimental area of Embrapa Corn and Sorghum, Sete Lagoas, MG. The leaf samples were examined for 15 minutes in the central region of leaf in search of adult C. tricholaenae. We recorded 2930 individuals of C. tricholaenae, 1114 on Bt Cry 1F, 752 on Cry 1 A

  16. A large parasitengonid mite (Acari, Erythraeoidea from the Early Cretaceous Crato Formation of Brazil

    J. A. Dunlop

    2007-08-01

    Full Text Available A new large, fossil mite (Arachnida: Acari, Pararainbowia martilli n. gen. n. sp., is described from the Early Cretaceous (Aptian Crato Formation from Ceará State, Brazil. It is assigned to the Cohort Parasitengona and the superfamily Erythraeoidea, some extant members of which can reach up to seven millimetres in body length. Given that doubts have been raised about the identity of putative Crato feather mite eggs, this new fossil represents the first unequivocal record of Acari from the Crato Formation, the first non-amber record of an erythraeoid mite and the oldest named example of this superfamily. Fossil erythraeoids from Mesozoic and Tertiary ambers are briefly reviewed – including a widely overlooked Late Cretaceous species – with comments on Mesozoic mites in general. Thirteen Baltic amber erythraeoids have been formally described, but much unstudied material from various amber sources remains. Ein neues großes Milbenfossil (Arachnida: Acari, Pararainbowia martilli n. gen. n. sp., wird aus der Crato Formation (Unterkreide, Aptium des Ceará Gebietes in Brasilien beschrieben. Es wird der Kohorte Parasitengona und der Überfamilie Erythraeoidea zugeordnet; die modernen Vertreter erreichen eine Körperlänge bis zu sieben mm. Weil die Identität von Federmilbeneiern aus der Crato Formation in Frage gestellt wurde, ist dieser Neufund der erste klare Hinweis von Acari aus der Crato Formation. Es ist die erste erythraeoide Milbe, die nicht aus dem Bernstein stammt sowie das älteste genannte Beispiel dieser Überfamilie. Fossile erythraeoide Milben aus dem Bernstein des Mesozoikum und des Tertiärs werden kurz zusammengefasst – u. a. eine weitgehend übersehene Art aus der Oberkreide – mit allgemeinen Anmerkungen zu den mesozoischen Milben. Dreizehn erythraeoide Milbenarten sind aus dem baltischen Bernstein genannt und beschrieben worden, aber weiteres unbearbeitetes Material von verschiedenen Bernstein-Fundpunkten liegt noch vor

  17. De corticole fauna van platanen: i. Arachniden (Arachnida: Araneae, Pseudoscorpiones, Acari)

    Noordijk, J.; Berg, M.P.

    2001-01-01

    The corticolous fauna of plane trees: I. Arachnids (Arachnida: Araneae, Pseudoscorpiones, Acari) From February until September 2000 an inventory was made of the bark-dwelling arthropod fauna of more than 400 plane trees (Platanus hybrida), all over the Netherlands. Arthropods were collected from bark and under the ‘loose’ bark fragments at a height of 160-175 cm from the ground. Algae, mosses and fungi are important resources for the corticolous fauna. Crevices in the tree trunk and loose bar...

  18. Historical review of the genus Dermanyssus Dugès, 1834 (Acari: Mesostigmata: Dermanyssidae)

    Roy L; Chauve C.M.

    2007-01-01

    A synthetic review of the historical systematics of Dermanyssus Dugès, 1834 (Acari: Mesostigmata: Dermanyssidae) is provided. The classification at the specific level in this early genus has not really been clarified during more than a century despite its economic impact, and the history of the genus is complex and includes various stages. Moreover, Dermanyssus currently includes 23 species, whereas the last review took only 18 species into account. Changes in the species status and position ...

  19. A survey of ticks (Acari: Ixodidae) of companion animals in Australia

    Greay, Telleasha L.; Oskam, Charlotte L.; Alexander W Gofton; Rees, Robert L; Ryan, Una M.; Irwin, Peter J.

    2016-01-01

    Background Ticks are among the most important vectors of pathogens affecting companion animals, and also cause health problems such as tick paralysis, anaemia, dermatitis, and secondary infections. Twenty ixodid species have previously been recorded on dogs, cats, and horses in Australia, including Rhipicephalus sanguineus, Ixodes holocyclus and Haemaphysalis longicornis, which transmit tick-borne diseases. A survey of hard ticks (Acari: Ixodidae) was conducted during 2012–2015 to investigate...

  20. Acaricidal and repellent activities of essential oil of Eucalyptus globulus against Dermanyssus gallinae (Acari: Mesostigmata)

    Dehghani-Samani Amir; Madreseh-Ghahfarokhi Samin; Dehghani-Samani Azam; Pirali-Kheirabadi Khodadad

    2015-01-01

    Introduction: By considering an increase in drug resistance against red mites, finding the nonchemical herbal acaricide against Dermanyssus gallinae (De Geer) (Acari: Mesostigmata) is necessary to kill them and to reduce the chemical resistance against chemical acaricides in this specie. Dermanyssus gallinae is a potential vector of the causal agent of several viral diseases such as Equine encephalitis and St. Louis encephalitis. It can be a vector of bacteria such as Salmonella spp., Mycobac...

  1. CARACTERIZAÇÃO QUÍMICA E EFEITO DO ÓLEO ESSENCIAL DE ERVA-DE-SANTA-MARIA SOBRE O ÁCARO-RAJADO DE MORANGUEIRO

    JOÃO PAULO PEREIRA PAES; VANDO MIOSSI RONDELLI; ADILSON VIDAL COSTA; ULYSSES RODRIGUES VIANNA; VAGNER TEBALDI DE QUEIROZ

    2015-01-01

    O ácaro-rajado, Tetranychus urticae Koch (1836) (Acari: Tetranychidae), é a principal praga na cultura do morangueiro. O objetivo deste trabalho foi a caracterização química do óleo essencial de Chenopodium ambrosioides L. e a avaliação de seus efeitos sobre o ácaro-rajado. Os compostos do óleo essencial foram identificados pelasanálises de CG-DIC e CG-EM. A mortalidade e a oviposição foram avaliadas após a pulverização do óleo (2,5; 5,0; 7,5 e 10,0% v v-1) sobre fêmeas do ácaro-rajado. O ren...

  2. A new species of Atractides Koch, 1837 (Acari: Hydrachnidia, Hygrobatidae from Ethiopia, with a discussion on the biodiversity of the genus Atractides in the Afrotropical region

    Vladimir Pesic

    2011-03-01

    Full Text Available A new species of Atractides Koch, 1837 (Acari, Hydrachnidia is described from Ethiopia. The world number of Atractides now tallies 297 species. The diversity of the genus Atractides in the Afrotropical region is briefly discussed.

  3. The complete mitochondrial genome of the citrus red mite Panonychus citri (Acari: Tetranychidae): high genome rearrangement and extremely truncated tRNAs

    Dou Wei; Wang Bao-Jun; Wei Dan-Dan; Yuan Ming-Long; Wang Jin-Jun

    2010-01-01

    Abstract Background The family Tetranychidae (Chelicerata: Acari) includes ~1200 species, many of which are of agronomic importance. To date, mitochondrial genomes of only two Tetranychidae species have been sequenced, and it has been found that these two mitochondrial genomes are characterized by many unusual features in genome organization and structure such as gene order and nucleotide frequency. The scarcity of available sequence data has greatly impeded evolutionary studies in Acari (mit...

  4. Sobre el género Neocalonyx (Acari: Prostigmata: Hydryphantidae en las Yungas About the genus Neocalonyx (Acari: Prostigmata: Hydryphantidae in the Yungas

    Beatriz Rosso de Ferradás

    2007-12-01

    Full Text Available Se tratan aquí dos especies conocidas del género Neocalonyx y se describe una nueva especie, N. diaguita sp. nov. de la provincia de Jujuy (Argentina. Se discuten los caracteres considerados en los tres subgéneros y los cuatro grupos de especies, reconocidos en uno de ellos.Two known species of Neocalonyx genus are dealt with in this paper, and one new species, N. diaguita sp. nov. from Jujuy province in Argentina is described.The characters considered in the three subgenera and the four species groups of one of them are discussed.

  5. Development of Iphiseiodes quadripilis (Banks) (Acari: Phytoseiidae) on pollen or mite diets and predation on Aculops pelekassi (Keifer) (Acari: Eriophyidae) in the laboratory.

    Villanueva, Raul T; Childers, Carl C

    2007-02-01

    Development and reproduction of Iphiseiodes quadripilis (Banks) were evaluated on single food diets of pollen (Malephora crocea Jacquin [ice plant] or Quercus sp. [oak]), spider mites, [Eutetranychus banksi (McGregor) or Panonychus citri (McGregor) (Acari: Tetranychidae)], or the citrus rust mite Phyllocoptruta oleivora (Ashmead) (Acari: Eriophyidae). Experiments were conducted in an environmental chamber at 28 degrees +/- 1 degrees C, 14:10 (L:D) daylength, and 45% RH. I. quadripilis completed development and laid viable eggs that subsequently hatched on diets of either ice plant or oak pollen or eggs and motile stages of E. banksi. P. citri was acceptable as prey, but survival of larvae to adults was only 36%, whereas survival on E. banksi, ice plant pollen, and oak pollen was 48, 60, and 68%, respectively. The webbing produced by P. citri seemed to inhibit foraging behavior of I. quadripilis larvae and nymphs. Larvae of I. quadripilis developed only to the second nymphal instar on a diet of P. oleivora alone or water alone. Starved I. quadripilis females and deutonymphs were observed preying on the pink citrus rust mite, Aculops pelekassi (Keifer) (Eriophyidae). During 4-min observation trials, two series of I. quadripilis fed on 1.8 +/- 0.47 and 3.5 +/- 0.45 A. pelekassi motile stages after being starved for 6 and 24 h, respectively. I. quadripilis females did not prey on P. oleivora in arenas containing both rust mite species. PMID:17349110

  6. New feather mites of the subfamily Pterodectinae (Acari: Astigmata: Proctophyllodidae) from passerines (Aves: Passeriformes) in Mato Grosso do Sul, Brazil

    Mironov, S. V.; Literák, I.; Čapek, Miroslav

    2008-01-01

    Roč. 1947, - (2008), s. 1-38. ISSN 1175-5326 Institutional research plan: CEZ:AV0Z60930519 Keywords : Acari * Astigmata * feather mites * systematics * Brazil * Proctophyllodidae * Aves * Passeriformes Subject RIV: EG - Zoology Impact factor: 0.740, year: 2008 http://www.mapress.com/zootaxa/2008/f/zt01947p038.pdf

  7. New feather mites of the subfamily Pterodectinae (Acari: Proctophyllodidae) from passerines and woodpeckers (Aves: Passeriformes and Piciformes) in Vietnam

    Mironov, S.; Literák, I.; Hung, N. M.; Čapek, Miroslav

    2012-01-01

    Roč. 3440, č. 3440 (2012), s. 1-49. ISSN 1175-5326 R&D Projects: GA MŠk LC06073 Institutional support: RVO:68081766 Keywords : Acari * feather mites * Proctophyllodidae * systematics * Aves * Passeriformes * Piciformes * Vietnam Subject RIV: EG - Zoology Impact factor: 0.974, year: 2012 http://www.mapress.com/zootaxa/2012/f/zt03440p049.pdf

  8. Effect of coconut palm proximities and Musa spp. germplasm resistance to colonization by Raoiella indica (Acari: Tenuipalpidae)

    Although coconut (Cocos nucifera L.) is the predominant host for Raoiella indica Hirst (Acari: Tenuipalpidae), false spider mite infestations do occur on bananas and plantains (Musa spp. Colla). Since its introduction, the banana and plantain industries have been negatively impacted to different deg...

  9. A mite (Acari: Erythraeidae) as unusual parasite on an adult caddisfly (Trichoptera: Hydroptilidae) from the Dominican Republic (West Indies)

    Botosaneanu, L.; Bolland, H.R.

    1997-01-01

    BOTOSANEANU, L. & H.R. BOLLAND, 1997. A mite (Acari: Erythraeidae) as unusual parasite on an adult caddisfly (Trichoptera: Hydroptilidae) from the Dominican Republic (West Indies). Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 71-76. First known case of a caddisfly (adult Leucotrichia tubifex Flint, 1964) parasitized by a mite (larva of Leptus sp.) belonging to another group than Hydrachnellae.

  10. A novel disease affecting the predatory mite Phytoseiulus persimilis (Acari, Phytoseiidae): evidence for the involvement of bacteria

    Schütte, C.; Poitevin, O.J.L.; Dicke, M.

    2008-01-01

    Adult female Phytoseiulus persimilis Athias-Henriot (Acari, Phytoseiidae) of a laboratory population show drastic changes in foraging behavior, anatomy and life history compared to typical laboratory populations. We demonstrated earlier that the set of characteristic symptoms, called non-responding

  11. Ticks (Acari: Ixodida) on wild carnivores in Brazil.

    Labruna, Marcelo B; Jorge, Rodrigo S P; Sana, Dênis A; Jácomo, Anah Tereza A; Kashivakura, Cyntia K; Furtado, Mariana M; Ferro, Claudia; Perez, Samuel A; Silveira, Leandro; Santos, Tarcísio S; Marques, Samuel R; Morato, Ronaldo G; Nava, Alessandra; Adania, Cristina H; Teixeira, Rodrigo H F; Gomes, Albério A B; Conforti, Valéria A; Azevedo, Fernando C C; Prada, Cristiana S; Silva, Jean C R; Batista, Adriana F; Marvulo, Maria Fernanda V; Morato, Rose L G; Alho, Cleber J R; Pinter, Adriano; Ferreira, Patrícia M; Ferreira, Fernado; Barros-Battesti, Darci M

    2005-01-01

    The present study reports field data of ticks infesting wild carnivores captured from July 1998 to September 2004 in Brazil. Additional data were obtained from one tick collection and from previous published data of ticks on carnivores in Brazil. During field work, a total of 3437 ticks were collected from 89 Cerdocyon thous (crab-eating fox), 58 Chrysocyon brachyurus (maned wolf), 30 Puma concolor (puma), 26 Panthera onca (jaguar), 12 Procyon cancrivorus (crab-eating raccoon), 4 Speothos venaticus (bush dog), 6 Pseudalopex vetulus (hoary fox), 6 Nasua nasua (coati), 6 Leopardus pardalis (ocelot), 2 Leopardus tigrinus (oncilla), 1 Leopardus wiedii (margay), 1 Herpailurus yagouaroundi (jaguarundi), 1 Oncifelis colocolo (pampas cat), 1 Eira barbara (tayara), 1 Galictis vittata (grison), 1 Lontra longicaudis (neotropical otter), and 1 Potus flavus (kinkajou). Data obtained from the Acari Collection IBSP included a total of 381 tick specimens collected on 13 C. thous, 8 C. brachyurus, 3 P. concolor, 10 P. onca, 3 P. cancrivorus, 4 N. nasua, 1 L. pardalis, 1 L. wiedii, 4 H. yagouaroundi, 1 Galictis cuja (lesser grison), and 1 L. longicaudis. The only tick-infested carnivore species previously reported in Brazil, for which we do not present any field data are Pseudalopex gymnocercus (pampas fox), Conepatus chinga (Molina's hog-nosed skunk), and Conepatus semistriatus (striped hog-nosed skunk). We report the first tick records in Brazil on two Felidae species (O. colocolo, H. yagouaroundi), two Canidae species (P. vetulus, S. venaticus), one Procyonidae species (P. flavus) and one Mustelidae (E. barbara). Tick infestation remains unreported for 5 of the 26 Carnivora species native in Brazil: Oncifelis geoffroyi (Geoffroy's cat), Atelocynus microtis (short-eared dog), Pteronura brasiliensis (giant otter), Mustela africana (Amazon weasel), and Bassaricyon gabbii (olingo). Our field data comprise 16 tick species represented by the genera Amblyomma (12 species), Ixodes (1

  12. New species, new records and re-description of spider mites (Acari: Tetranychidae) from India.

    Zeity, Mahran; Srinivasa, N; Gowda, C Chinnamade

    2016-01-01

    Two species of Tetranychidae (Acari), Oligonychus neotylus sp. nov. from Zea mays and Pennisetum purpureum (Poaceae) and Tetranychus hirsutus sp. nov. from Gymnema sylvestre R. Br. (Apocynaceae) are described from Karnataka state, south India. Tetranychus bambusae Wang and Ma is recorded for the first time from India and re-described. Four other species are reported for the first time from India viz., Oligonychus coniferarum (McGregor), Oligonychus duncombei Meyer, Tetranychus marianae McGregor and Tetranychus okinawanus Ehara from Cupressus sp., an undetermined grass, Centrosema pubescens and Adenium obesum, respectively. PMID:27394311

  13. The residual and direct effects of reduced-risk and conventional miticides on twospotted spider mites, Tetranychus urticae (Acari: Tetranychidae) and predatory mites (Acari: Phytoseiidae)

    The residual effects of several reduced-risk and conventional miticides were evaluated in strawberries (Fragaria × ananassa Duchesne) on the twospotted spider mite (TSSM), Tetranychus urticae Koch (Acari: Tetranychidae) and on 2 predatory mites, Neoseiulus californicus McGregor and Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae). Experiments were conducted in the laboratory and greenhouse. The greenhouse experiments also tested the direct effects of the miticides on TSSM. The efficacy of conventional and reduced-risk miticides was evaluated on strawberry leaf discs and on whole plants for control of TSSM. Furthermore, the residual effects of these miticides were evaluated on whole strawberry plants against selective predatory mites. For TSSM, 5 treatments were evaluated: a conventional miticide; fenbutatin-oxide (Vendex[reg]) and 3 reduced-risk miticides; binfenazate (Acramite 50WP[reg]), activated garlic extract (Repel[reg]), sesame seed and castor oil (Wipeout[reg]), and a water-treated control. For predatory mites, the residual effects of only Acramite[reg] and Vendex[reg] were evaluated. Acramite[reg] was the most effective acaricide in reducing TSSM populations in both the laboratory and greenhouse experiments. Vendex[reg] and Wipeout[reg] were also effective in the laboratory, but did not cause significant reduction of TSSM in the greenhouse. Repel[reg] was the least effective of the 4 pesticides evaluated. Neither Acramite[reg] nor Vendex[reg] had a significant effect on either predatory mite species. However, there appeared to be more predatory mites on the Vendex[reg]-treated plants than on the Acramite[reg]-treated plants. There were significantly more predatory mites of both species on the cue plants, which were inoculated with TSSM versus the non-cue plants, which were not inoculated. (author)

  14. Pyrethroid resistance in Phytoseiulus macropilis (Acari: Phytoseiidae): cross-resistance, stability and effect of synergists.

    Queiroz, Maria Cristina Vitelli; Sato, Mario Eidi

    2016-01-01

    Phytoseiulus macropilis Banks (Acari: Phytoseiidae) is an effective predator of Tetranychus urticae Koch (Acari: Tetranychidae). The objectives of this research were to study the stability of fenpropathrin resistance and the cross-resistance relationships with different pyrethroids, and also to evaluate the effect of synergists [piperonyl butoxide (PBO), diethyl maleate (DEM) and S,S,S-tributyl phosphorotrithioate (DEF)] on fenpropathrin resistant and susceptible strains of this predaceous mite. The stability of fenpropathrin resistance was studied under laboratory conditions, using P. macropilis populations with initial frequencies of 75 and 50% of resistant mites. The percentages of fenpropathrin resistant mites were evaluated monthly for a period of up to 12 months. A trend toward decreased resistance frequencies was observed only during the first 3-4 months. After this initial decrease, the fenpropathrin resistance was shown to be stable, maintaining constant resistance frequencies (around 30%) until the end of the evaluation period. Toxicity tests carried out using fenpropathrin resistant and susceptible strains of P. macropilis indicated strong positive cross-resistance between fenpropathrin and the pyrethroids bifenthrin and deltamethrin. Bioassays with the synergists DEM, DEF and PBO were also performed. The maximum synergism ratio (SR = LC50 without synergist/LC50 with synergist) detected for the three evaluated synergists (PBO, DEM, DEF) was 5.86 (for DEF), indicating low influence of enzyme detoxification processes in fenpropathrin resistance. PMID:26530989

  15. Digital signage sobre IP

    Casademont Filella, Albert

    2012-01-01

    Projecte que versa sobre el disseny i la implementació d'un sistema de Digital Signage (Cartelleria Digital) sobre IP, creant un gestor que permeti controlar de forma remota tot un conjunt de petits dispositius connectats a pantalles que emeten continguts multimèdia com vídeos, imatges, feeds rss...

  16. Beklemishevia hispaniola n. sp., nuevo representante de la Cohorte Palaeosomata (Acari, Oribatei en España

    Pérez-Iñigo, C.

    1996-12-01

    Full Text Available A new species of oribatid mite (Acari, Oribatei belonging to the family Ctenacaridae (Cohors Palaeosomata is described; this species was recorded several times in Spain as Beklemishevia galeodula Zachvatkin, 1945. The new species is easily distinguishable from the mentioned one because of the presence of three claws in every leg, a noticeable pigidial neotrichy and the absence of short, almost spiniform, setae on the pygidium.Se describe una nueva especie de oribátido (Acari, Oribatei perteneciente a la familia Ctenacaridae (Cohorte Palaeosomata que habia sido citada varias veces en España como Beklemishevia galeodula Zachvatkin, 1945, y de la que se diferencia por presentar tres uñas en todas las patas, una acentuada neotriquia pigidial y carecer de setas cortas espiniformes en el pigidio.

  17. Prolixus (Acari: Trombidiformes: Tenuipalpidae) newly recorded from New Zealand: A new species from Cyperaceae and its ontogenetic patterns in chaetotaxy.

    Xu, Yun; Zhang, Zhi-Qiang

    2014-01-01

    The genus Prolixus (Acari: Tenuipalpidae) was represented by two species from Australian sedges prior to this study. A new species, Prolixus meyerae sp. nov., is here described and illustrated from leaves of Gahnia (Cyperaceae) in Auckland, New Zealand. In this paper, we present the ontogenetic additions in idiosomal and leg chaetotaxy from larva to adult. A key to world species of Prolixus is also proposed. PMID:25543721

  18. Ultrafiltros sobre ω.

    Mancilla Hernández, Salvador

    2012-01-01

    El objetivo del presente trabajo estudiar los ideales y filtros sobre conjuntos numerables, los que comúnmente conocemos como filtros sobre ω o ideales sobre ω. Dentro de estos, nos enfocaremos en la clase de I-ultrafiltros los cuales fueron estudiados por James Baumgartner en [11]. Y dentro de esta clase de ultrafiltros, nos concentraremos cuando I es {A ⊆ ω : n∈A g(n) < ∞}, también conocido como ideal sumable con respecto a g, donde g es una sucesión de números reales no negativ...

  19. Sobre el Paisaje Cultural

    Hernández León, Juan Miguel

    2008-01-01

    El 4º Congreso Europeo sobre Investigación Arquitectónica y Urbana EURAU’08, organizado por la Escuela Técnica Superior de Arquitectura de la Universidad Politécnica de Madrid y dedicado a reflexionar sobre el “Paisaje cultural”, continúa la tarea de intercambio de conocimientos científicos y experiencias docentes entre las escuelas y facultades europeas de Arquitectura emprendida en las ediciones anteriores de Marsella, acerca de “La cuestión doctoral”, de Lille, sobre “El espacio considerad...

  20. The complete mitochondrial genome of the citrus red mite Panonychus citri (Acari: Tetranychidae: high genome rearrangement and extremely truncated tRNAs

    Dou Wei

    2010-10-01

    Full Text Available Abstract Background The family Tetranychidae (Chelicerata: Acari includes ~1200 species, many of which are of agronomic importance. To date, mitochondrial genomes of only two Tetranychidae species have been sequenced, and it has been found that these two mitochondrial genomes are characterized by many unusual features in genome organization and structure such as gene order and nucleotide frequency. The scarcity of available sequence data has greatly impeded evolutionary studies in Acari (mites and ticks. Information on Tetranychidae mitochondrial genomes is quite important for phylogenetic evaluation and population genetics, as well as the molecular evolution of functional genes such as acaricide-resistance genes. In this study, we sequenced the complete mitochondrial genome of Panonychus citri (Family Tetranychidae, a worldwide citrus pest, and provide a comparison to other Acari. Results The mitochondrial genome of P. citri is a typical circular molecule of 13,077 bp, and contains the complete set of 37 genes that are usually found in metazoans. This is the smallest mitochondrial genome within all sequenced Acari and other Chelicerata, primarily due to the significant size reduction of protein coding genes (PCGs, a large rRNA gene, and the A + T-rich region. The mitochondrial gene order for P. citri is the same as those for P. ulmi and Tetranychus urticae, but distinctly different from other Acari by a series of gene translocations and/or inversions. The majority of the P. citri mitochondrial genome has a high A + T content (85.28%, which is also reflected by AT-rich codons being used more frequently, but exhibits a positive GC-skew (0.03. The Acari mitochondrial nad1 exhibits a faster amino acid substitution rate than other genes, and the variation of nucleotide substitution patterns of PCGs is significantly correlated with the G + C content. Most tRNA genes of P. citri are extremely truncated and atypical (44-65, 54.1 ± 4.1 bp, lacking

  1. Garrapatas (Acari: Ixodidae asociadas a perros en diferentes ambientes de la provincia de Corrientes, Argentina Ticks (Acari: Ixodidae of dogs in different environments of the Corrientes Province, Argentina

    V.N. Debárbora

    2011-06-01

    Full Text Available Se estudiaron las garrapatas (Acari: Ixodidae de perros en ambientes urbanos, periurbanos y rurales de la provincia de Corrientes por medio de colecciones mensuales durante un año en siete sitios diferentes. De los 138 perros examinados, en 87 (63,04% se determinaron tres especies de garrapatas: Amblyomma tigrinum (n=35, Amblyomma ovale (n=2 y Rhipicephalus sanguineus sensu lato (n=523. Las mayores prevalencias para A. tigrinum y R. sanguineus s.l. fueron halladas en ambientes rurales. Especímenes de R. sanguineus s.l. fueron detectados a lo largo de todo el año, con picos de abundancia en primavera y verano, A. tigrinum fue encontrada en otoño, invierno y primavera con un pico en esta última estación, mientras que A. ovale fue colectada sólo en primavera. Rhipicephalus sanguineus s.l. y A. tigrinum fueron halladas en todos los ambientes muestreados, pero el primer taxón fue siempre el más abundante. Teniendo en cuenta que las especies del complejo R. sanguineus son potenciales vectores de microorganismos patógenos para los perros y humanos, y debido a la alta prevalencia registrada en este estudio, queda en evidencia la relevancia de aplicar métodos para su control en las áreas incluidas en este estudio.Ticks (Acari: Ixodidae of dogs in urban, peri-urban and rural areas from the Corrientes Province, Argentina, were studied. They were monthly collected during one year at 7 different sites. A total of 138 dogs were examined, and 87 (63.04% of them were infested; and three species were determined: Amblyomma tigrinum (n=35, Amblyomma ovale (n=2 and Rhipicephalus sanguineus sensu lato (n=523. Both A. tigrinum and R. sanguineus s.l. had the highest prevalence in rural areas. Specimens of R. sanguineus s.l. were collected in the four seasons, but the peaks of abundance were detected in spring and summer. Amblyomma tigrinum was found in autumn, winter and spring, with the peak of abundance in spring, and the two specimens of A. ovale were

  2. First record of the genus .i.Bloszykiella./i. in Kenya with the description of .i.Bloszykiella tertia./i. sp n. (Acari: Uropodidae) from a .i.Pinus radiata./i. D. Don plantation

    Kontschán, J.; Starý, Josef

    2015-01-01

    Roč. 56, č. 3 (2015), s. 629-635. ISSN 1681-5556 Institutional support: RVO:60077344 Keywords : Acari * new species * Pinus radiata plantation * Kenya Subject RIV: EG - Zoology Impact factor: 0.464, year: 2014

  3. Description of a new species of bat-associated argasid tick (Acari: Argasidae) from Brazil.

    Dantas-Torres, Filipe; Venzal, José M; Bernardi, Leopoldo F O; Ferreira, Rodrigo L; Onofrio, Valéria C; Marcili, Arlei; Bermúdez, Sergio E; Ribeiro, Alberto F; Barros-Battesti, Darci M; Labruna, Marcelo B

    2012-02-01

    A new species of argasid tick (Acari: Argasidae) is described from immature and adult specimens collected from several localities in Brazil. A complete morphological account is provided for all postembryonic life stages, i.e., larva, nymph, female, and male. Ornithodoros cavernicolous n. sp. is the 113(th) in the genus. Morphologically, the new species shares common features, e.g., presence of well-developed cheeks and legs with micromammillate cuticle, with other bat-associated argasid ticks included in the subgenus Alectorobius. In particular, the new species is morphologically related to Ornithodoros azteci Matheson, with which it forms a species group. Phylogenetic analysis based on the 16S rRNA gene sequences supports the placement of the new species within a large clade that includes other New World bat-associated argasids. However, the new species seems to represent an independent lineage within the genus Ornithodoros. PMID:21955330

  4. Arthropod colonization of land--linking molecules and fossils in oribatid mites (Acari, Oribatida).

    Schaefer, Ina; Norton, Roy A; Scheu, Stefan; Maraun, Mark

    2010-10-01

    Terrestrial fossils that document the early colonization of land are scarce for >100 my after the Cambrian explosion. This raises the question whether life on land did not exist or just did not fossilize. With a molecular dating technique, we analyzed the origin of terrestrial chelicerate microarthropods (Acari, Oribatida) which have a fossil record since the Middle Devonian that is exceptional among soil animals. Our results suggest that oribatid mites originated in the Precambrian (571+/-37 mya) and that the radiation of basal groups coincides with the gap in the terrestrial fossil record between the Cambrian explosion and the earliest fossilized records of continental ecosystems. Further, they suggest that the colonization of land started via the interstitial, approximately 150 my earlier than the oldest fossils of terrestrial ecosystems. Overall, the results imply that omnivorous and detritivorous arthropods formed a major component in early terrestrial food webs, thereby facilitating the invasion of terrestrial habitats by later colonizers of higher trophic levels. PMID:20420932

  5. Benefits and risks of the subcutaneous immunotherapy with acari extracts in allergic rhinoconjunctivitis and bronchial asthma

    Olimpio Rodríguez-Santos

    2014-12-01

    Full Text Available The records of patients from the Allergology Service in the Previsora Policlinic, Camagüey were revised to evaluate benefits and risks of the subcutaneous immunotherapy (ITSC with extracts of acari. The study was observational, analytic and retrospective of cases and controls in allergic rhinoconjunctivitis and bronchial asthma. A total of 160 subjects, older than 18 years old, were chosen. Eighty out of them had already received ITSC with dose increase during 13 weeks and maintenance with monthly injections during 18 months. A total of 80 patients who only received prevention measures and medications during the crises were paired. Questionnaires were applied for quality of rhinoconjunctivitis life and asthma, about the consumption of medications and the frequency of the crises. The adverse events were measured, as they were local and systemic to the cutaneous tests, to the ITSC and the different pharmacological treatments. There was a significant increase of the punctuation of life quality questionnaires, (p=0.011. The consumption of medications decreased in both the cases and the controls, without significant differences (p=0.083. The frequency of the rhinitis and asthma crises decrease in the group of ITSC (p=0.029. Slight local and systemic reactions were reported in both groups with Odds ratio (OR=2.029 in the ITSC group, with a 95% confidence interval of 1.114–3.967 (p=0.019. The results show that the subcutaneous immunotherapy with acari offers benefits and few risks to patients with allergic rhinoconjunctivitis and asthma.

  6. Ticks (Acari: Ixodida: Argasidae, Ixodidae infesting humans in Northwestern Córdoba province, Argentina Garrapatas infestando humanos en el noroeste de la provincia de Córdoba, Argentina

    Nava Santiago

    2006-06-01

    Full Text Available Ticks infesting humans were collected from September 2004 to August 2005 in Northwestern Córdoba in an area with a southern limit in the locality of Dean Funes (30°25´S 64°20´W and San José de las Salinas (30°00´S 64°37´W in the North. The collections consisted in ticks found attached on man obtained from three sources: 1 specimens fixed on two workers during two successive days per month of field work in the northern part of the area which belongs to Western Chaco district of the phytogeographical Chaco domain, 2 ticks attached to a man working in a farm close to Dean Funes in the Chaco Serrano district of the Chaco domain and, 3 ticks collected from a collaborator visiting daily a suburban property with dogsin the vicinities of Dean Funes. Most ticks collected were larvae, nymphs and adults of Amblyomma neumanni from the Chaco Serrano district where a nymph of Otobius megnini was also found on man. Adults of Amblyomma parvum and Amblyomma tigrinum were detected feeding on humans in the Western Chaco district and in the property close to Dean Funes, respectively. Amblyomma neumanni was absent on man from December to April while most specimens of A. parvum and A. tigrinum were collected during summer. Their role as potential vector of ticktransmitted diseases in the area is unknown.Se recolectaron garrapatas (Acari: Ixodida: Argasidae, Ixodidae infestando humanos entre septiembre de 2004 y agosto de 2005 en un área del noroeste de Córdoba cuyo límite al sur es la localidad Deán Funes (30º25´S 64°20´W y el límite al norte es la localidad de San José de las Salinas (30°00´S 64°37´W. Las colecciones consistieron en garrapatas fijadas a humanos obtenidas de tres fuentes: 1 garrapatas fijadas sobre dos trabajadores durante dos días sucesivos por mes de trabajo de campo en la parte norte del área, la cual pertenece al distrito chaqueño occidental del dominio fitogeográfico del Chaco, 2 garrapatas fijadas a un trabajador en

  7. Molecular characterization of a new monopartite dsRNA mycovirus from mycorrhizal Thelephora terrestris (Ehrh.) and its detection in soil oribatid mites (Acari: Oribatida)

    Petrzik, Karel; Sarkisova, Tatiana; Starý, Josef; Koloniuk, Igor; Hrabáková, Lenka; Kubešová, Olga

    2016-01-01

    Roč. 489, FEB 2016 (2016), s. 12-19. ISSN 0042-6822 R&D Projects: GA MŠk LH13136 Institutional support: RVO:60077344 Keywords : Acari * Earthfan fungus * Mycovirus * Oribatida Subject RIV: EE - Microbiology, Virology Impact factor: 3.321, year: 2014

  8. Evaluation of corn plant as potential banker plant for supporting predatory gall Midge, Feltiella acarisuga (Diptera: Cecidomyiidae) against Tetranychus urticae (Acari: Tetranychidae) in greenhouse vegetable production

    The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is one of the most important and highly polyphagous pests of vegetables and other crops worldwide. In this study, several experiments were conducted under laboratory and greenhouse conditions to evaluate whether corn plant ...

  9. A review of mites of the genus Neharpyrhynchus Fain (Acari: Harpirhynchidae) - ectoparasites of wild birds, including description of four new species

    Martinů, J.; Dusbábek, František; Literák, I.

    2008-01-01

    Roč. 34, č. 2 (2008), s. 197-209. ISSN 0164-7954 Institutional research plan: CEZ:AV0Z60220518 Keywords : Acari * Neharpyrhynchus * Harpirhynchidae * mites * bird s * Czech Republic Subject RIV: EG - Zoology Impact factor: 0.438, year: 2008

  10. Two new families (Acari: Alicorhagiidae and Platyhelminthes: Prorhynchidae) reported for the Hungarian fauna From leaf litter in the Bükk Mountains

    Pfliegler, W.P.; Bolton, S.J.

    2016-01-01

    Two new members of the Hungarian fauna are reported, both of them were collected in beech forest leaf litter in the Bükk Mountains, North-East Hungary: Alicorhagia fragilis Berlese, 1910 (Arthropoda: Arachnida: Acari: Sarcopti-formes: Endeostigmata: Alicorhagiidae) and Geocentrophora baltica (Kennel, 1883) (Platyhelminthes: Rhabditophora: Trepaxonemata: Amplimatricata: 'Lecithoepitheliata': Prorhynchida: Prorhynchidae). The families Alicorhagiidae and Prorhynchidae both represent...

  11. A new species of Aculops (Acari: Prostigmata: Eriophyidae) from Serbia on Dipsacus laciniatus L. (Dipsacaceae), a weed target of classical biological control in the United States of America

    The new eriophyid mite species Aculops dipsaci n. sp. (Acari: Prostigmata: Eriophyidae) collected from Dipsacus laciniatus L. (Dipsacaceae) in northern Serbia is described and illustrated. Differential diagnosis is provided in comparison with Aculops salixis Xue, Song and Hong. This is the first e...

  12. Inferencias sobre Grafos

    Sira M. Allende; Carlos N. Bouza

    2002-01-01

    El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el anal...

  13. Mitos sobre agroecologia.

    Canuto, João Carlos

    2011-01-01

    O presente ensaio vem a discutir alguns aspectos do discurso sobre a Agroecologia, procurando evidenciar contradições do senso comum, advindas seja de parte da comunidade leiga, dos meios de comunicação ou da comunidade científica. Coloca em debate alguns mitos sobre os sistemas agroecológicos, tais como: que sejam tecnologicamente retrógrados, de baixa produtividade, exigentes em mão-de-obra, economicamente inviáveis e “puramente ideológicos”.

  14. Progress in the complete mitochondrial genomes of the Acari%蜱螨线粒体基因组研究进展

    袁明龙; 王进军

    2012-01-01

    Acari, including ticks and mites, is one of the most diverse group of arthropods. In this paper, we reviewed the research progress in the 28 sequenced complete mitochondrial genomes of acari species. These mitochondrial genomes have several marked features; (1) There is significant variation in the size of mitochondrial genomes among the 28 acari species, and the mitochondrial genome of Panonychus citri (13 077 bp) is the smallest among all sequenced arthropods; (2) The base composition of all acari mitochondrial genomes are biased toward A and T, with six species harboring reverse GC-skew values (positive value) ; (3) The base composition and the position, length, copy number of the A +T-rich regions vary greatly among the 28 acari species, of which four tetranychid species harbor the highest A +T content within acari and the shortest A +T-rich region (44-57 bp) among arthropods; (4) High gene rearrangements are found in acari mitochondrial genomes, especially in those of Acariformes, but the rearrangements are not correlated to high taxonomic ranks; (5) The tRNA genes in some species of Acariformes are extremely truncated, presenting atypical cloverleaf structures. We suggest that it is necessary to sequence more acari mitochondrial genomes aiming to investigate whether these tRNA genes lacking both D- and T-arms are functional or not, to analyze the molecular mechanisms of evolution in acari mitochondrial genomes, and to carry out the acari mitochondrial transcriptome studies.%蜱螨亚纲包括蜱类和螨类,是节肢动物中物种多样性最高的类群之一.本文综述了当前已测序的28种蜱螨线粒体基因组的研究成果.概括起来,蜱螨线粒体基因组具有以下特点:(1)大小变异显著,其中柑橘全爪螨Panonychus citri线粒体基因组在目前已测节肢动物中最小(13077 bp);(2)一般碱基组成偏向A和T,但6种蜱螨具有相反的GC-偏斜(正值);(3)基因组的碱基组成及A+T富集区的位置、长度和

  15. A new species of Litarachna (Acari, Hydrachnidia, Pontarachnidae from a Caribbean mesophotic coral ecosystem

    Vladimir Pesic

    2014-07-01

    Full Text Available New records of pontarachnid mites (Acari: Hydrachnidia from the Caribbean island of Puerto Rico are presented. Litarachna lopezae sp. n., from substrata collected from Bajo de Sico, a mesophotic coral reef ecosystem in Mona Passage off Puerto Rico, is described as new to science. The new species was collected from nearly 70 m depth, the greatest depth from which pontarachnid mites have been found until now. In addition, a Litarachna sp. was also found in association with the tube of the polychaete Sabellastarte magnifica (Shaw, 1800 at the shallow waters of north Puerto Rico.

  16. Toxicidade diferencial de produtos à base de abamectina ao ácaro Brevipalpus phoenicis (Geijskes, 1939 (Acari: Tenuipalpidae em citros Differential toxicity of abamectin based products over Brevipalpus phoenicis (Geijskes, 1939 (Acari: Tenuipalpidae mite in citrus

    Daniel Júnior de Andrade

    2010-03-01

    Full Text Available O ácaro Brevipalpus phoenicis é uma das principais pragas dos citros por ser vetor do "Citrus Leprosis Virus" (CiLV, agente causal da leprose, uma das mais graves doenças da citricultura. Objetivou-se avaliar o efeito tóxico de produtos à base de abamectina sobre o ácaro B. phoenicis. Foram realizados um experimento de ação direta e três de ação residual no Laboratório de Acarologia do Departamento de Proteção de Plantas (Fitossanidade da FCAV - UNESP, Jaboticabal-SP. O delineamento adotado nos bioensaios foi o inteiramente casualizado, onde 10 tratamentos foram repetidos 7 vezes, sendo cada repetição composta por um fruto de laranja. Os tratamentos estudados (mL p.c./100 L de água foram: Acaramik a 20; 30; 40 e 50 mL; Vertimec a 30 e 40 mL; Abamectin Nortox a 30 e 40 mL; Tricofol a 77 mL e uma testemunha sem aplicação. Utilizaram-se frutos com presença de verrugose, que foram lavados e parcialmente parafinados, deixando-se uma área sem parafina, que foi circundada com cola entomológica para contenção dos ácaros. Transferiram-se 20 ácaros adultos B. phoenicis para cada fruto. No bioensaio de ação direta, a transferência foi realizada antes das aplicações e, nos bioensaios de ação residual, aos 5; 10 e 15 dias após a aplicação dos produtos. A aplicação dos produtos sobre os frutos foi realizada em Torre de Potter. Os resultados obtidos nos bioensaios evidenciaram que os melhores tratamentos foram: Tricofol a 77 mL, Acaramik a 40 e 50 mL e Vertimec a 40 mL. De forma geral, os produtos testados podem ser utilizados no controle do ácaro B. phoenicis.The mite Brevipalpus phoenicis (Geijskes, 1939 (Acari: Tenuipalpidae is one of the most important pests in Brazil citrus plantation, because it is the virus "Citrus Leprosis Virus" (CiLV vector, one of the most serious citrus plantation diseases. The purpose of this experiment was to evaluate the toxical effect of abamectin in the mite B. phoenicis. It was performed

  17. Inferencias sobre Grafos

    Sira M. Allende

    2002-05-01

    Full Text Available El estudio de un juego puede ser modelado asumiendo que solo algunas partidas son observadas. Entonces el árbol del juego debe ser estimado utilizando información muestral. Similarmente ocurre al obtener información sobre el comportamiento de las decisiones tomadas por individuos muestreados sobre un árbol de decisión teórico. Al considerar una medida de probabilidad que caracterice el comportamiento de redes aleatorias se puede obtener un estimado del árbol asociado. Este problema es el analizado en este trabajo. Algunos resultados experimentales obtenidos usando Recocido Simulado ilustran el procedimiento. Su papel en el estudio de modelos económicos y de mercadeo es discutido.

  18. Escrito sobre el cuerpo

    Antonio Malalana Ureña

    2013-09-01

    Full Text Available El catálogo, en una edición bilingüe español-inglés, es una pequeña guía de la exposición Shirin Neshat. Escrito sobre el cuerpo, muestra que se integra dentro de los actos de PHOTOESPAÑA13, el festival internacional de fotografía y artes visuales. El esquema del libro es sencillo y los textos son extremadamente divulgativos. El primero de ellos, Escrito sobre el cuerpo (pp. 10-15, cuyo autor es Octavio Zaya, comisario de la exposición, resume la trayectoria de esta intelectual, que "interactúa" con la fotografía y los formatos audiovisuales, y nos presenta la argumentación narrativa de los documentos expuestos, contextualizando la obra recopilada.

  19. Estudios sobre Borges

    Facultad de Humanidades y Ciencias de la Educación

    1991-01-01

    Contenidos de la obra: De Barthes a Pierre Menard | José Luis De Diego Pierre Menard, autor del Quijote: De la poligrafía al fraude | Andrea Cucatto Homenaje a Roberto Arlt: La otra cara de la moneda | Fabio Espósito Emma a través del espejo: Una lectura de Emma Zunz | Graciela Beatriz Goldchluk Sobre el concepto de verdad en Borges | Sergio Pastormerlo

  20. Sobre genes y electrones

    Martín Pereda, José Antonio

    1992-01-01

    El autor reflexiona sobre un artículo publicado en una revista, en el que se pronosticaba un declive para los científicos dedicados a la física y la ciencia armamentística, debido al fin de la guerra fría, y un ascenso al poder de los biólogos y de todos aquellos relacionados con las ciencias y las tecnologías de la vida.

  1. Primeiro registro de Oligonychus yothersi (McGregor (Acari: Tetranychidae em Eucalyptus grandis Hill ex Maiden no Brasil First record of Oligonychus yothersi (McGregor (Acari: Tetranychidae on Eucalyptus grandis Hill ex Maiden in Brazil

    Fabrício Fagundes Pereira

    2005-08-01

    Full Text Available Relata-se a infestação de um ácaro-vermelho em mudas clonais de Eucalyptus grandis Hill ex Maiden, mantidas em casa de vegetação no município de Martinho Campos, Minas Gerais. O ácaro foi observado na parte superior das folhas que exibiam sinais de sucção de seiva e bronzeamento. Essas injúrias causaram desenvolvimento anormal e morte de plantas. O ácaro foi identificado como Oligonychus yothersi (McGregor (Acari: Tetranychidae, e isso representa o primeiro registro dessa espécie em mudas clonais de E. grandis no Brasil.An infestation of the red spider mite was reported in clone seedlings of Eucalyptus grandis Hill ex Maiden under greenhouse conditions, in the municipality of Martinho Campos, Minas Gerais State. The spider mite was found on the leaf upper faces with signs of sap suction and bronzing. Such injuries caused abnormal development and plant death. The spider mite was identified as Oligonychus yothersi (McGregor (Acari: Tetranychidae. This is the first record of O. yothersi on E. grandis seedlings in Brazil.

  2. CARACTERIZAÇÃO QUÍMICA E EFEITO DO ÓLEO ESSENCIAL DE ERVA-DE-SANTA-MARIA SOBRE O ÁCARO-RAJADO DE MORANGUEIRO

    JOÃO PAULO PEREIRA PAES

    2015-06-01

    Full Text Available O ácaro-rajado, Tetranychus urticae Koch (1836 (Acari: Tetranychidae, é a principal praga na cultura do morangueiro. O objetivo deste trabalho foi a caracterização química do óleo essencial de Chenopodium ambrosioides L. e a avaliação de seus efeitos sobre o ácaro-rajado. Os compostos do óleo essencial foram identificados pelasanálises de CG-DIC e CG-EM. A mortalidade e a oviposição foram avaliadas após a pulverização do óleo (2,5; 5,0; 7,5 e 10,0% v v-1 sobre fêmeas do ácaro-rajado. O rendimento do óleo essencial foi de 0,3%, e os compostos identificados foram (Z-ascaridol (87%, (E-ascaridol (5,04%, p-cimeno (4,83%, a- terpineno (1,24% e piperitona (0,7%. Os maiores valores para mortalidade e redução de oviposição observados foram 85% e 69%, respectivamente. O óleo essencial de C. ambrosioidesé uma opção promissora para o manejo do ácaro-rajado.

  3. Acaricidal activity of Juglans regia leaf extracts on Tetranychus viennensis and Tetranychus cinnabarinus (Acari: Tetranychidae).

    Wang, Y N; Shi, G L; Zhao, L L; Liu, S Q; Yu, T Q; Clarke, S R; Sun, J H

    2007-08-01

    Leaf extracts of the walnut, Juglans regia L., were evaluated under laboratory conditions to determine their acaricidal activity on the mites Tetranychus cinnabarinus (Boisduval) and Tetranychus viennensis Zacher (Acari: Tetranychidae). Extracts had both contact and systemic toxicity to these mites. The four solvents tested for preparing crude extracts were petroleum ether, chloroform, ethyl acetate, and methanol. Methanol was the most efficient solvent, with an extraction rate from 17.06 + 0.80 to 20.27 +/- 0.28%. Petroleum ether was the least effective solvent, with extraction rates from 2.30 +/- 0.13 to 2.71 +/- 0.13%. However, the crude extracts with petroleum ether resulted in the highest mite mortality (79.04 +/- 0.52%) in a slide dip bioassay. Mites mortalities from the concentrated extracts prepared by chloroform, ethyl acetate, methanol, or distilled water were significantly lower than petroleum ether. The mean lethal concentrations (LC50) of the extracts from petroleum ether, chloroform, ethyl acetate, methanol, and distilled water to the two mite species were 0.73 +/- 0.04, 1.66 +/- 0.28, 4.96 +/- 0.35, 7.45 +/- 0.67, and 9.91 +/- 0.32 mg/ml, respectively. After liquid chromatography and thin-layer chromatography, the concentrated extracts of petroleum ether were separated into eight fractions and tested for acaricidal activity. Fraction 6 produced significantly higher mite mortality rates than the other groups, killing approximately 90% of both species. PMID:17849883

  4. Acaricidal and repellent activities of essential oil of Eucalyptus globulus against Dermanyssus gallinae (Acari: Mesostigmata

    Dehghani-Samani Amir

    2015-07-01

    Full Text Available Introduction: By considering an increase in drug resistance against red mites, finding the nonchemical herbal acaricide against Dermanyssus gallinae (De Geer (Acari: Mesostigmata is necessary to kill them and to reduce the chemical resistance against chemical acaricides in this specie. Dermanyssus gallinae is a potential vector of the causal agent of several viral diseases such as Equine encephalitis and St. Louis encephalitis. It can be a vector of bacteria such as Salmonella spp., Mycobacterium spp. and Erysipelothrix rhusiopathiae. It is also known to cause itching dermatosis in humans. In this study acaricidal and repellent activities of essential oil of Eucalyptus globulus against Dermanyssus gallinae were studied. Methods: After extracting the essential oil, different concentrations of the plant extract were prepared. Then, acaricidal effect of different concentrations was tested on poultry red mite, Dermanyssus gallinae, by dropping 3-4 drops of essential oil on mites. Repellent activity of essential oil was tested by Y-tube olfactometer bioassay. After the test, total number of killed and repellent mites reported. Results: Concentration of 1:2 or 50% had more acaricidal effect on mites. Also essential oil of Eucalyptus globulus had repellent activity against red mites. Conclusion: This study showed that essential oil of Eucalyptus globulus had acaricidal and repellent activities against red mites. Hence it might be used as a herbal acaricide against it to kill and to reduce the chemical resistance in this specie.

  5. Historical review of the genus Dermanyssus Dugès, 1834 (Acari: Mesostigmata: Dermanyssidae

    Roy L.

    2007-06-01

    Full Text Available A synthetic review of the historical systematics of Dermanyssus Dugès, 1834 (Acari: Mesostigmata: Dermanyssidae is provided. The classification at the specific level in this early genus has not really been clarified during more than a century despite its economic impact, and the history of the genus is complex and includes various stages. Moreover, Dermanyssus currently includes 23 species, whereas the last review took only 18 species into account. Changes in the species status and position in the genus Dermanyssus from 1834 until today are presented. The evolution of the generic definition is explored and compared with other genera of the group. How the discrimination between the different species evolved in the genus is also examined. Some difficulties in the specific definitions are discussed. A current diagnosis of the genus Dermanyssus is given. A table of the species included in this genus since its first description along with their respective current positions, a list of the currently included species in Dermanyssus with their hosts, and a world map presenting their geographic distribution are provided.

  6. Distribution of Chaetodactylus krombeini (Acari: Chaetodactylidae) within Osmia cornifrons (Hymenoptera: Megachilidae) nests: implications for population management.

    McKinney, Matthew I; Park, Yong-Lak

    2013-06-01

    Chaetodactylus krombeini (Baker) (Acari: Chaetodactylidae) is a cleptoparasitic mite that negatively affects propagation of Osmia spp. (Hymenoptera: Megachilidae) for orchard pollination in the USA. This study was conducted to determine the effect of C. krombeini on mortality of male and female Osmia cornifrons, the Japanese hornfaced bee. A total of 107 O. cornifrons nests were examined to determine within-nest distribution of C. krombeini with regression analyses. A total of 30 mite-free O. cornifrons nests were observed and within-nest distribution of male and female O. cornifrons was determined with non-linear regression analyses. In addition, cocoons from 20 mite-infested O. cornifrons cells were examined to determine whether C. krombeini could be found inside cocoons of O. cornifrons. The results of this study showed that female O. cornifrons and C. krombeini were found more frequently in the inner part of the nest, and male O. cornifrons were found mostly in the center of the nest. No C. krombeini were found inside O. cornifrons cocoons. These results indicate that C. krombeini have a greater negative impact on mortality in the egg and larval stages of female O. cornifrons than in male O. cornifrons. Implications for management of C. krombeini and O. cornifrons populations for orchard pollination are discussed in this article. PMID:23100109

  7. Flagging versus dragging as sampling methods for nymphal Ixodes scapularis (Acari: Ixodidae)

    Rulison, Eric L.; Kuczaj, Isis; Pang, Genevieve; Hickling, Graham J.; Tsao, Jean I.; Ginsberg, Howard S.

    2013-01-01

    The nymphal stage of the blacklegged tick, Ixodes scapularis (Acari: Ixodidae), is responsible for most transmission of Borrelia burgdorferi, the etiologic agent of Lyme disease, to humans in North America. From 2010 to fall of 2012, we compared two commonly used techniques, flagging and dragging, as sampling methods for nymphal I. scapularis at three sites, each with multiple sampling arrays (grids), in the eastern and central United States. Flagging and dragging collected comparable numbers of nymphs, with no consistent differences between methods. Dragging collected more nymphs than flagging in some samples, but these differences were not consistent among sites or sampling years. The ratio of nymphs collected by flagging vs dragging was not significantly related to shrub density, so habitat type did not have a strong effect on the relative efficacy of these methods. Therefore, although dragging collected more ticks in a few cases, the numbers collected by each method were so variable that neither technique had a clear advantage for sampling nymphal I. scapularis.

  8. Beat sampling accuracy in estimating spruce spider mite (Acari: Tetranychidae) populations and injury on juniper.

    Shrewsbury, Paula M; Hardin, Mark R

    2004-08-01

    The use of a standardized beat sampling method for estimating spruce spider mite, Oligonychus ununguis (Jacobi) (Acari: Tetranychidae), densities on a widely used evergreen ornamental plant species, Juniperus chinensis variety 'Sargentii' A. Henry (Cupressaceae), was examined. There was a significant positive relationship between total spruce spider mite densities and spider mite densities from beat sampling on juniper. The slope and intercept of the relationship may be used by pest managers to predict total spider mite densities on plants from beat sample counts. Beat sampling dramatically underestimates the total number of spider mites on a foliage sample. The relationships between spruce spider mite feeding injury and spider mite density estimates from beat sampling juniper foliage and total spider mite counts on foliage were also examined. There was a significant positive relationship between spruce spider mite density as estimated from beat sampling and injury to the plants. There was a similar positive relationship between the total number of spruce spider mites and injury to the plants, suggesting that a pest manager could use beat sampling counts to estimate plant injury and related thresholds. These findings have important implications to decision-making for spruce spider mite control, especially as it relates to threshold levels and determining rates of predator releases. Further assessment of the effectiveness of beat and other sampling methods across multiple spider mite- host plant associations needs to be examined to enable pest managers to select sampling plans that are feasible and reliable. PMID:15384359

  9. Ticks (Acari: Ixodidae) infesting birds in an Atlantic rain forest region of Brazil.

    Ogrzewalska, Maria; Pacheco, Richard C; Uezu, Alexandre; Richtzenhain, Leonardo J; Ferreira, Fernando; Labruna, Marcelo B

    2009-09-01

    Brazil has the third richest bird diversity of the world; however, there are few data concerning ticks (Acari: Ixodidae) parazitizing birds. The aim of the study was to report tick infestations on wild birds from an Atlantic rain forest region of Brazil. During 2 yr, ticks were collected from birds and from the environment in 12 forest sites. A total of 1,725 birds were captured representing 80 species from 24 families. In total, 223 (13%) birds were found infested by immature stages of Amblyomma ticks: 1,800 larvae and 539 nymphs. The prevalence of ticks was higher among birds from the families Thamnophilidae, Conopophagidae, and Momotidae. The most common tick parasitizing birds was Amblyomma nodosum Koch. Other tick species, Amblyomma coelebs Neumann, Amblyomma cajennense (F.), Amblyomma ovale Koch, Amblyomma longirostre (Koch), Amblyomma calcaratum Neumann, and Amblyomma naponense (Packard), were found sporadically. Among free-living ticks collected in the environment, A. cajennense was the most common, followed by A. coelebs, A. naponense, Amblyomma brasilense Aragão, and Hemaphysalis juxtakochi Cooley. PMID:19769058

  10. Spatial distribution of galls caused by Aculus tetanothrix (Acari: Eriophyoidea) on arctic willows.

    Kuczyński, Lechosław; Skoracka, Anna

    2005-01-01

    The distribution of galls caused by Aculus tetanothrix (Acari: Eriophyoidea) on three Salix species was studied. The factors influencing this distribution were analysed, i.e. willow species, study area and shoot length. Spatial pattern of gall distribution within the shoot was also examined. The study was conducted in Russia, Kola Peninsula. Densities of galls caused by A. tetanothrix differed significantly among willow species. Considerably higher gall density was recorded in the White Sea coast than in the Khibiny Mountains. This may be explained by the influence of a milder maritime climate that favors mite occurrence compared to a harsh and variable mountain climate that limits mite abundance. There was no relationship between the gall density and the shoot length. The highest density of galls was recorded on the inner offshoots; within the offshoot, there was a maximum density on the fifth leaf. This pattern was repeatable for all shoots studied, independent of the study area, willow species and length of shoots, suggesting the optimal conditions for A. tetanothrix exist on leaves in the middle part of a shoot. This distribution pattern may be an effect of the trade-off between the costs and benefits resulting from leaf quality and mite movement along the shoot. This hypothesis, however, needs to be tested experimentally. PMID:16132741

  11. Apuntes sobre liderazgo

    Contreras, Manuel E.

    2010-01-01

    Este trabajo presenta una breve síntesis de las principales teorías de liderazgo y se centra sobre el enfoque de liderazgo adaptativo de Ronald Heifetz. El documento originalmente fue desarrollado para las sesiones de educación a distancia de INDES. Ha sido revisado para usar en otros ámbitos de capacitación y ha sido utilizado en sesiones presenciales llevadas a cabo por INDES, como por otras entidades en universidades y centros de capacitación de America Latina.

  12. Informe APEI sobre movilidad

    Arroyo Vázquez, Natalia

    2011-01-01

    Este informe incluye una amplia aproximación al concepto de movilidad, desde un punto de vista introductorio, que nunca antes en nuestro ámbito había abarcado todos los aspectos que tienen que ver con él, desde cuestiones técnicas como los dispositivos móviles, sistemas operativos y navegadores, conectividad y estándares —cuya intención es poder comprender todos aquellos aspectos relacionados con la movilidad y que tienen una incidencia directa sobre los contenidos— hasta otras más relacionad...

  13. Sobre el razonamiento judicial

    Asís Roig, Rafael de

    1998-01-01

    El trabajo elabora modelos a través de los cuáles es posible reconstruir la argumentación judicial plasmada en las sentencias y, a la vez, hacer explícitas las reglas que sirven de justificación a sus decisiones, y el marco normativo utilizado como referencia. El estudio analiza tanto los pronunciamientos sobre hechos como los que se refieren a la calificación jurídica, en principio, desde una perspectiva descriptiva. Ahora bien, también se llevan a cabo reflexiones y propuestas que van más a...

  14. Lâminas de irrigação e sombreamento na produção de biomassa de Acariçoba (Hydrocotyle umbellata L.)

    Alves, N. M.; M.D.B. LIMA; J.R. Paula; G.A. SIMON

    2015-01-01

    RESUMO:A acariçoba é uma planta utilizada pela medicina ayurvédica e em cosméticos por possuir propriedades rejuvenescedoras e revitalizante do sistema nervoso e cérebro. Com objetivo de avaliar os caracteres agronômicos e o teor de flavonóides totais de acariçoba em resposta a aplicação de lâminas distintas de irrigação e sombreamento, foi conduzido um experimento em área localizada nas coordenadas 17º 47' 53'' latitude (S); longitude (W) - 51º 55' 53'', com altitude média de 648m, no períod...

  15. Sobre historia mundial hoy

    Vera Weiler

    2010-08-01

    Full Text Available Los procesos de globalización son una realidad; su enorme impacto sobre la vida humana los ha convertido en un tema recurrente sobre el que se escribe y se comenta a diario también en Colombia. Los libros que de ellos tratan, ante todo los que 10 hacen en tono crítico, baten records en la industria editorial en todo el mundo. Las expectativas que acerca del futuro abrigan cientos de millones de personas se relacionan con 10 que ellas esperan, para bien o para mal, de la globalización. Las posturas que los gobernantes ocupan al respecto en el mundo son, cuando menos de aceptación, generalmente de activa participación en pos de la globalización. Por un lado, crece la preocupación y se multiplican las protestas; por el otro, dominan los razonamientos de los especialistas en materia de maximización de los rendimientos de los capitales que presentan la globalización, al estilo que se viene imponiendo, como el camino ineludible del gobierno universal de la eficiencia. ¿Tienen que decir algo los historiadores frente a todo esto?.

  16. Acaricidal and Ovicidal Effects of Sage (Salvia officinalis L.) and Rosemary (Rosmarinus officinalis L.) (Lamiaceae) Extracts on Tetranychus urticae Koch (Acari: Tetranychidae)

    Sibel YORULMAZ SALMAN; Sarıtaş, Semiha; KARA, Nimet; Ay, Recep

    2014-01-01

    Tetranychus urticae Koch (Acari: Tetranychidae) is a harmful pest for crops such as vegetables, fruits, and ornamental and industrial plants. The usage of plant extracts for pest control is seen as an alternative to synthetic pesticides. The effect of methanolic extracts obtained from sage (S. officinalis) and rosemary (R. officinalis) plants from the Lamiaceae family on T. urticae was researched in an effort to create an alternative to synthetic pesticides. The spray tower-leaf disk method w...

  17. Acaricidal and oviposition deterring effects of santalol identified in sandalwood oil against two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae)

    Roh, Hyun Sik; Lim, Eu Gene; Kim, Jinwoo; Park, Chung Gyoo

    2011-01-01

    Thirty-four plant essential oils were screened for their acaricidal and oviposition deterrent activities against two-spotted spider mite (TSSM), Tetranychus urticae Koch (Acari: Tetranychidae), in the laboratory using a leaf-dip bioassay. From initial trials, sandalwood and common thyme oils were observed to be the most effective against TSSM adult females. Subsequent trials confirmed that only sandalwood oil was significantly active (87.2 ± 2.9% mortality) against TSSM adult females. Sandalw...

  18. Secondary structure of expansion segment D1 in LSU rDNA from Arachnida and its phylogenetic application in Eriophyoid mites and in Acari.

    Wang, Zheng-Hang; Zhao, Ya-E; Xu, Yang; Hu, Li; Chen, Yi-Meng

    2015-12-01

    An increasing number of researchers have applied secondary-structure based multiple alignments of rDNA genes in phylogeny. These studies mostly depended on a few valuable divergent domains in LSU and SSU rDNA. Yet other divergent domains, e.g. D1, were poorly investigated and rarely used. However, these domains might contain additional evolutionary data and play a vital role in DNA-based phylogenetic study. Here, we investigated all available D1 sequences of Arachnida taxa and predicted corresponding secondary structures to help identify homologous positions in the D1 region. Long insertions were found exclusive to Eriophyoidea and folded into three newly proposed helices. Non-Acari taxa were all GC rich. In Acari, most Trombidiformes and all Mesostigmata (Parasitiformes) taxa were AT rich and Ixodida (Parasitiformes) GC rich; however there was no consistent base bias in Sarcoptiformes sequences. For Eriophyoid mites, genera Cecidophyopsis and Aceria were both well supported in MP, NJ, ME and ML tress based on D1 sequences, and clusters of Cecidophyopsis species were identical with former study. This demonstrated that the D1 region could act as a valuable molecular marker in phylogenetic reconstruction of Eriophyoidea. Additionally, D1 has been proven suitable in phylogenetic analysis at the family and genus level in Acari, but not in Opiliones. PMID:26420464

  19. Excertos sobre o sedentarismo

    Alexandre Palma

    2014-09-01

    Full Text Available O sedentarismo tem sido tratado como algo perfeitamente determinável, objetivo e, portanto, que pode ser apreendido. Por outro lado, o conceito de sedentarismo ainda permanece questionável e, por conseguinte, os instrumentos mostram-se inconsistentes. Neste sentido, o objetivo do presente estudo foi mostrar que diferentes discursos de verdade vêm concorrendo por esse conceito, o que nos motiva a pensar qual é a verdade ou, até mesmo, se há alguma verdade sobre ele. Após apresentarmos diferentes possibilidades de compreender o sedentarismo, através do uso de aforismos, entendemos que postular um discurso como verdade talvez apenas signifique que as pessoas nele creem e que há uma vontade de verdade como uma vontade voltada para o poder.

  20. Voz sobre frame relay

    D´Elia, Gabriel Anibal

    2000-01-01

    Esta tesis trata el tema de VOFR, desde la digitalización de la voz hasta su transmisión a través de dicha red, así también como la comparación con otros medios de transporte como VOIP. Dada las características del protocolo frame relay y su disponibilidad se eligió como el medio más apropiado para la transmisión de voz y datos en forma integrada sobre una misma red. El trabajo comienza con una breve explicación de la voz, su digitalización y forma actual de transmisión a través de una red di...

  1. Description of a new argasid tick (Acari: Ixodida) from bat caves in Brazilian Amazon.

    Nava, Santiago; Venzal, Jose M; Terassini, Flavio A; Mangold, Atilio J; Camargo, Luis Marcelo A; Labruna, Marcelo B

    2010-12-01

    Nothoaspis amazoniensis n. sp. (Acari: Ixodida: Argasidae) is described from adult and immature ticks (nymph II, nymph I, larva) collected from bat caves in the Brazilian Amazon. Also, 16S rDNA sequences are provided. The diagnostic characters for adults are the presence of false shield or nothoaspis, an anteriorly projecting hood covering the capitulum, a medial extension of palpal article I (flaps), genital plate extending from coxa I to IV, absence of 2 setae on the internal margin of the flaps, a minute hypostome without denticles, presence of a central pore in the base of hypostome, and a reticulate surface pattern on the posterior half of the nothoaspis in males. The nymph II stage is characterized by a hood that is small in relation to the capitulum, short coxal setae, palpal flaps lacking setae on the internal margin, long hypostome, pointed with dentition 4/4 apically, and the anterior half of the body is covered by a cell-like configuration. Nymph I stage is characterized by a hood, small in relation to the capitulum, dorsum of the body covered by a cell-like configuration, venter integument covered by a cell-like configuration, and hypostome dentition 4/4 with apices that are "V"-shaped. Diagnostic characters of the larvae are the number and size of dorsal setae, and the shape of scutum and hypostome. The new species appears to have a life cycle with a larva that feeds on bats, a non-feeding nymphal stage (nymph I), a feeding nymphal stage (nymph II), and adults that probably represent non-feeding stages. PMID:21158616

  2. Susceptibility of Tetranychus urticae Koch. (Acari: Tetranychidae to Isolates of Entomopathogenic Fungus Beauveria bassiana

    Slavimira A. Draganova

    2010-01-01

    Full Text Available Bioassays with five isolates of the entomopathogenic fungus Beauveria bassiana (Bals.- Criv. Vuillemin were conducted under laboratory conditions with a goal to estimate their virulence to the two-spotted spider mite Tetranychus urticae Koch. (Acari: Tetranychidae. Common bean plants with mites were treated by spraying conidial suspensions of isolates at concentrations of 106, 107 and 108 conidia/ml. Lethal effects of the fungal isolates wereevaluated as percentages of cumulative daily mortality due to mycoses, corrected for mortality in the control variant. Virulence of the isolates was estimated based on values of the median lethal time (LT50 calculated by probit analysis for the variants treated with conidial suspensions at the concentration of 106 conidia/ml.The two-spotted spider mite was found susceptible to the examined isolates of the entomopathogenic fungus B. bassiana. Mycosis caused to T. urticae by the B. bassiana isolates 444 Bb and 445 Bb had fast lethal effect after treatment with conidial suspensions even at the concentration of 106 conidia/ml. The mean mortality values of host individuals were 83.78 ± 3.62% and 68.49 ± 4.28% on the first day, respectively, and up to 100% in both variants on the fourth day.The isolates 426 Bb, 444 Bb and 445 Bb of B. bassiana were highly virulent to two-spotted spider mites with values of the median lethal time varied within overlapped narrow confidence intervals from 0.122 to 1.084 days (average value 0.162 days, from 0.117 to 1.398 days (average value 0.146 days and from 0.106 to 1.162 days (average value 0.131 days,respectively. Significant differences regarding virulence of the three isolates at p-level < 0.05 could not been proved. The other two examined isolates were distinctly less virulent to T. urticae than these three B. bassiana isolates.

  3. TAMBO VIEJO: UN ASENTAMIENTO FORTIFICADO EN EL VALLE DE ACARÍ, PERÚ (Tambo Viejo: A Fortified Settlement in the Acari Valley, Peru

    Lidio M. Valdez

    2013-10-01

    Full Text Available La aparición de los asentamientos fortificados y el origen del conflicto violento son temas poco discutidos en el contexto de la arqueología peruana. Considero que es oportuno investigar y determinar cuándo y por qué surgieron los primeros asentamientos fortificados. El propósito central de este artículo está precisamente orientado a responder tales interrogantes y discutir el tema del conflicto violento en el valle de Acarí y, por extensión, en la costa sur del Perú. Las evidencias arqueológicas disponibles señalan que, durante el periodo Intermedio Temprano, Tambo Viejo fue un asentamiento defendido por varias estructuras perimétricas. Otros sitios contemporáneos de Tambo Viejo en Acarí también fueron fortificados. Además, existe en el mismo valle evidencia tangible de violencia en la forma de prisioneros que posteriormente fueron decapitados. En contraste a la evidencia proveniente de Acarí, no existen asentamientos del periodo Intermedio Temprano identificables como fortificaciones, lo que hace de los sitios de Acarí los primeros asentamientos fortificados de toda la costa sur. ENGLISH: The emergence of violent conflict and of fortified settlements is a subject little studied within Peruvian archaeology. However, I consider it vital to investigate and determine the time and the reasons under which fortified settlements were first established. The central aim of this paper is to discuss when and why fortified settlements emerged first in the Acari Valley and, by extension, in the south coast of Peru. Available archaeological evidence indicates that during the Early Intermediate Period, Tambo Viejo was a fortified settlement protected by several massive walls. Other neighbouring sites in Acari were also fortified. Furthermore, in Acari there is conclusive evidence for violence in the form of decapitated individuals. In contrast to evidence coming from Acari, not a single Early Intermediate Period settlement from other

  4. Demodex castoris sp. nov. (Acari: Demodecidae) parasitizing Castor fiber (Rodentia), and other parasitic arthropods associated with Castor spp.

    Izdebska, Joanna N; Fryderyk, Sławomira; Rolbiecki, Leszek

    2016-02-11

    A new species of demodecid mite, Demodex castoris sp. nov. (Acari: Prostigmata: Demodecidae), is described based on adult stages from the skin of the nasal region of the Eurasian beaver Castor fiber Linnaeus, 1758, collected in Poland. This is the first detection of a representative demodecid mite in rodents of the suborder Castorimorpha and also represents the first detection of a skin mite in Eurasian beavers. The new species is a small skin mite (average 173 µm in length) characterized by sexual dimorphism related to body proportions. D. castoris sp. nov. was observed in 4 out of 6 beavers examined (66.6%), with a mean intensity of 10.8 and an intensity range of 2-23 ind. host(-1). This paper also contains a checklist of parasitic arthropods known from Castor spp. PMID:26865230

  5. A new species of Tenuipalpus sensu stricto (Acari: Tenuipalpidae) from Brazil, with ontogeny and a key to the known species.

    Castro, Elizeu B; Feres, Reinaldo J F; Ochoa, Ronald; Bauchan, Gary R

    2016-01-01

    The Cerrado is the second largest Brazilian biome, and is considered to be a "hotspot" due the great concentration of endemic species and high rate of deforestation. Surveys of the mite fauna present in this biome have revealed a great number of new species. In this paper, we describe Tenuipalpus spinosaurus sp. nov. (Acari: Tenuipalpidae), a new species of Tenuipalpus sensu stricto, from adult females, deutonymphs, protonymphs, larvae and eggs, collected on Terminalia argentea (Combretaceae), from the Cerrado in Brazil. Females of this new species bear a prominent longitudinal crest on the opisthosoma. The ontogenetic changes in the idiosoma and leg chaetotaxy of all stages are presented. A key to the world species of Tenuipalpus sensu stricto is provided. PMID:27394345

  6. Refletindo sobre idosos institucionalizado

    Cenir Gonçalves Tier

    2004-06-01

    Full Text Available Trata-se de uma pesquisa qualitativa, descritiva que teve por objetivo identificar como vem sendo o relacionamento idoso-família, identificando os motivos que levaram os familiares a optarem pela institucionalização do seu idoso, obtendo-se também a visão da família sobre o cuidado no lar. Para coleta dos dados utilizou-se um instrumento com perguntas abertas. A coleta dos dados efetivou-se nos meses de agosto de 2002 a julho de 2003, sendo sujeitos da pesquisa, familiares de idosos de uma instituição asilar em um município da região noroeste do Rio Grande do Sul. Através da análise de conteúdo constatou-se que a maior dificuldade encontrada pela família, visando dispensar cuidados ao idoso é a "falta de tempo para cuidar" do seu familiar idoso, pois a maioria deles exige cuidados em tempo integral.

  7. Sobre el nombre "Quechua"

    Rodolfo Cerrón-Palomino

    1985-06-01

    Full Text Available Uno de los primeros problemas con el que a menudo tropiezael estudioso de los idiomas ágrafos, como es el caso de las lenguasaborígenes de América, es el de su denominación (glotónimo.En la medida ,en que, por razones históricas, las noticias sobretales lenguas, y por consiguiente los primeros estudios sobre lasmismas, surgen a partir del contacto con los miembros de la civilización occidental, los nombres de los distintos idiomas, así comode los grupos étnicos que los manejan, son el resultado casi siempre arbitrario cie designaciones fortuitas hechas por viajeros, misiioneros y exploradores, quienes por lo general se basan, para ello, bien en descripciones físicas de los grupo étnicos, en ciertos indios geográficos que constituyen el habitat de los mismos, e incluso en prejuicios que se nutren de un marcado europocentrismo.

  8. The biology and fecundity of the citrus red mite Panonychus citri (McGregor) (Acari: Tetranychidae) at different temperatures under laboratory conditions

    KASAP, İsmail

    2009-01-01

    The developmental time and fecundity of Panonychus citri (McGregor 1916) (Acari: Tetranychidae) on Washington navel sweet orange (Citrus sinensis (L.) Osb.) leaves were determined at 15, 20, 25, 30 and 35 ± 1 °C, 65 ± 10% RH, and a 16:8-h (L:D) photoperiod under laboratory conditions. Total development time of P. citri females was 37.2, 16.6, 12.2, 9.8, and 9.0 days at 15, 20, 25, 30, and 35 ± 1 °C, respectively. Total and daily egg production levels of P. citri were highest at 25 °C (25.6 an...

  9. New records of marine water mites (Acari: Hydrachnidia: Pontarachnidae) from the Pujada Bay (West Pacific Ocean) and the Andaman Sea (Indian Ocean)

    Pesic, V.; Chatterjee, T.; Troch, M. de; Ingole, B.S.

    entomologica serbica, 2009, 14(1): 129-132 UDC 595.42(265.5+267) [Short communication] NEW RECORDS OF MARINE WATER MITES (ACARI: HYDRACHNIDIA: PONTARACHNIDAE) FROM THE PUJADA BAY (WEST PACIFIC OCEAN) AND THE ANDAMAN SEA (INDIAN OCEAN) VLADIMIR PEŠIĆ1, TAPAS... CHATTERJEE2, MARLEEN DE TROCH3 and BABAN INGOLE4 1 University of Montenegro, Department of Biology, Cetinjski put b.b., 81000 Podgorica, Montenegro E-mail: pesicv@t-com.me 2 Indian School of Learning, Department of Biology, I.S.M. Annexe, P.O. – I...

  10. Lizonia baldini sobre Polytrichum formosum

    Girbal i Lladó, Josep; Lloret Maya, Francisco; Pérez Obiol, Ramon

    1982-01-01

    S'ha trobat al Montseny (UTM:DG 46 26) l'ascomicet briofil Lizonia baldini (Pir) Dobb (Ordre Dothideales) parasit sobre Polytrichum formosum Hedw. Es descriuen les característiques dels exemplars observats i s'indica la seva incidencia en la producció d'anteridis

  11. Discurso sobre la historia colombiana

    Quijano Otero, José María

    2010-01-01

    Resumen de las lecciones de Historia Patria, desde la llegada de Colón hasta los primeros brotes independentistas. Sobre la manera de estudiar los hechos históricos: su enlace, las causas que los produjeron, i los efectos que de ellos derivaron.

  12. Visiones educativas sobre los MOOC

    Cabero Almenara, Julio

    2015-01-01

    Los “Cursos Masivos en Abiertos” o MOOC se están convirtiendo en una de las tecnologías de gran penetración en el terreno educativo en los últimos tiempos, considerándose por algunos como una tecnología que creará un tsunami sobre la educación

  13. Life history of Neoseiulus californicus (McGregor, 1954) (Acari: Phytoseiidae) fed with castor bean (Ricinus communis L.) pollen in laboratory conditions.

    Marafeli, P P; Reis, P R; Silveira, E C da; Souza-Pimentel, G C; de Toledo, M A

    2014-08-01

    The predatory mite, Neoseiulus californicus (McGregor, 1954) (Acari: Phytoseiidae) is one of the principal natural enemies of tetranychid mites in several countries, promoting efficient control of those mites in several food and ornamental crops. Pest attacks such as that of the spider mite, Tetranychus urticae Koch, 1836 (Acari: Tetranychidae), is one of the problems faced by farmers, especially in the greenhouse, due to the difficulty of its control with the use of chemicals because of the development of fast resistance making it hard to control it. The objective of this work was to study the life history of the predatory mite N. californicus as a contribution to its mass laboratory rearing, having castor bean plant [Ricinus communis L. (Euphorbiaceae)] pollen as food, for its subsequent use as a natural enemy of T. urticae on a cultivation of greenhouse rosebushes. The studies were carried out in the laboratory, at 25 ± 2°C of temperature, 70 ± 10% RH and a 14 hour photophase. The biological aspects and the fertility life table were appraised. Longevity of 32.9 days was verified for adult females and 40.4 days for males. The intrinsic rate of increase (rm) was 0.2 and the mean generation time (T) was 17.2 days. The population doubled every 4.1 days. The results obtained were similar to those in which the predatory mite N. californicus fed on T. urticae. PMID:25296220

  14. Transcriptome Analysis of the Carmine Spider Mite, Tetranychus cinnabarinus (Boisduval, 1867 (Acari: Tetranychidae, and Its Response to β-Sitosterol

    Chunya Bu

    2015-01-01

    Full Text Available Tetranychus cinnabarinus (Acari: Tetranychidae is a worldwide polyphagous agricultural pest that has the title of resistance champion among arthropods. We reported previously the identification of the acaricidal compound β-sitosterol from Mentha piperita and Inula japonica. However, the acaricidal mechanism of β-sitosterol is unclear. Due to the limited genetic research carried out, we de novo assembled the transcriptome of T. cinnabarinus using Illumina sequencing and conducted a differential expression analysis of control and β-sitosterol-treated mites. In total, we obtained >5.4 G high-quality bases for each sample with unprecedented sequencing depth and assembled them into 22,941 unigenes. We identified 617 xenobiotic metabolism-related genes involved in detoxification, binding, and transporting of xenobiotics. A highly expanded xenobiotic metabolic system was found in mites. T. cinnabarinus detoxification genes—including carboxyl/cholinesterase and ABC transporter class C—were upregulated after β-sitosterol treatment. Defense-related proteins, such as Toll-like receptor, legumain, and serine proteases, were also activated. Furthermore, other important genes—such as the chloride channel protein, cytochrome b, carboxypeptidase, peritrophic membrane chitin binding protein, and calphostin—may also play important roles in mites’ response to β-sitosterol. Our results demonstrate that high-throughput-omics tool facilitates identification of xenobiotic metabolism-related genes and illustration of the acaricidal mechanisms of β-sitosterol.

  15. New Miticides for Integrated Pest Management of Varroa destructor (Acari: Varroidae) in Honey Bee Colonies on the Canadian Prairies.

    Vandervalk, L P; Nasr, M E; Dosdall, L M

    2014-12-01

    Varroa destructor Anderson and Trueman 2000 (Acari: Varroidae) is an ectoparasitic mite of the honey bee, Apis mellifera L. (Hymenoptera: Apidae). Honey bee colonies require extensive management to prevent mortality caused by varroa mites and the viruses they vector. New miticides (Thymovar and HopGuard) to manage varroa mites were evaluated during the spring and fall treatment windows of the Canadian prairies to determine their effectiveness as part of an integrated management strategy. Thymovar and HopGuard were evaluated alongside the currently used industry standards: Apivar and formic acid. Results demonstrated that Apivar and formic acid remain effective V. destructor management options under spring and fall conditions. Applications of Thymovar during spring were associated with a reduction in brood area, and therefore should be limited to the fall season. The miticide HopGuard was not effective in managing V. destructor, and alteration of the current delivery system is necessary. This study demonstrates the potential for new effective treatment options to supplement currently used V. destructor integrated pest management systems. PMID:26470066

  16. Influence of the webbing produced by Oligonychus ilicis (McGregor) (Acari: Tetranychidae) on associated predatory phytoseiids

    Oligonychus ilicis (McGregor) is among those mite species that can cause damage to coffee plants (Coffea spp.). Species of Phytoseiidae acari are considered the most important and studied predatory mites. The objective of this study was to evaluate the effects of the webbing produced by O. ilicis on its predation by females of the phytoseiids Iphiseiodes zuluagai Denmark and Muma, Euseius citrifolius Denmark and Muma and Amblyseius herbicolus (Chant). Four bioassays were conducted, with three treatments and ten replicates. Each replicate consisted of 25 O. ilicis per experimental unit (a leaf disc of Coffea arabica) according to the tested developmental stage, in independent experiments. To spin the web, 15 adult females were put on each experimental unit for 24h; females were then removed, leaving only the web, and predators and prey to be tested were introduced. Predation was assessed after 24h. In the presence of webbing, the consumption of eggs, larvae and nymphs by I. zuluagai and eggs and larvae by E. citrifolius was lower. For A. herbicolus, egg predation was lower, but larval predation did not vary significantly and predation of nymphs and adults was higher in the presence of webbing. Predators as a whole were more efficient consuming larvae regardless of the presence of webbing. Considering the stages of O. ilicis altogether, webbing reduced the predation potential of I. zuluagai and E. citrifolius, but not of A. herbicolus. (author)

  17. Screening of spider mites (Acari: Tetranychidae) for reproductive endosymbionts reveals links between co-infection and evolutionary history.

    Zhang, Yan-Kai; Chen, Ya-Ting; Yang, Kun; Qiao, Ge-Xia; Hong, Xiao-Yue

    2016-01-01

    Reproductive endosymbionts have been shown to have wide-ranging effects on many aspects of their hosts' biology. A first step to understanding how these endosymbionts interact with their hosts is to determine their incidences. Here, we screened for four reproductive endosymbionts (Wolbachia, Cardinium, Spiroplasma and Rickettsia) in 28 populations of spider mites (Acari: Tetranychidae) representing 12 species. Each of the four endosymbionts were identified in at least some of the tested specimens, and their infection patterns showed variations at the species-level and population-level, suggesting their distributions can be correlated with both the phylogeny and ecology of the hosts. Co-infections of unrelated bacteria, especially double infections of Wolbachia and Cardinium within the same individuals were common. Spiroplasma and Rickettsia infections were specific to particular host species, respectively. Further, the evolutionary histories of these endosymbionts were inferred by comparing the phylogenies of them and their hosts. These findings can help to clarify the interactions between endosymbionts and arthropods. PMID:27291078

  18. Toxicity of acaricides to Raoiella indica and their selectivity for its predator, Amblyseius largoensis (Acari: Tenuipalpidae: Phytoseiidae).

    de Assis, Carla P O; de Morais, Elisângela G F; Gondim, Manoel G C

    2013-07-01

    Raoiella indica Hirst (Acari: Tenuipalpidae) is considered a pest of coconut palm in Asia and the Middle East. This mite was recently introduced in the Americas, where it spread to several countries and expanded its range of hosts, causing heavy losses to coconut and banana production. The phytoseiid mite Amblyseius largoensis (Muma) is one of the predators most often encountered in coconut palms. Because the current prospects for the control of R. indica in the New World indicate the use of acaricides and the management of their natural enemies, the objective of this study was to evaluate the toxicity of selected acaricides to R. indica and the selectivity (i.e., toxicity to the predator relative to toxicity to the prey) for A. largoensis. Assays were performed by the immersion of banana leaf discs in acaricide solutions, followed by the placing of adult females of the pest or predator on the discs. Mortality of the mites was evaluated after 24 h, and the data obtained were subjected to probit analysis. Abamectin, fenpyroximate, milbemectin and spirodiclofen were the products most toxic to R. indica adults, whereas fenpyroximate and spirodiclofen were the most selective for A. largoensis. PMID:23229493

  19. Experimental infestation with the immatures of Amblyomma dissimile Koch, 1844 (Acari: Ixodidae on Tropidurus torquatus (Lacertilia: Iguanidae and Oryctolagus cuniculus Infestação experimental com as fases imaturas de Amblyomma dissimile Koch, 1844 (Acari: Ixodidae em Tropidurus torquatus (Lacertilia: Iguanidae e Oryctolagus cuniculus

    L.H.T. Freitas

    2004-02-01

    Full Text Available Larvas provenientes de duas fêmeas de Amblyomma dissimile Koch, 1844 (Acari: Ixodidae, naturalmente ingurgitadas em uma iguana (Iguana iguana e provenientes do Estado do Mato Grosso, foram utilizadas na infestação experimental de lagartos da espécie Tropidurus torquatus e coelhos domésticos. As larvas alimentadas em ambos os hospedeiros realizaram ecdise para ninfas. As ninfas apenas ingurgitaram no lagarto e mudaram para machos e fêmeas. Este é o primeiro registro do parasitismo de larvas e ninfas de A. dissimile em T. torquatus e de larvas em coelhos.

  20. Experimental infestation with the immatures of Amblyomma dissimile Koch, 1844 (Acari: Ixodidae) on Tropidurus torquatus (Lacertilia: Iguanidae) and Oryctolagus cuniculus Infestação experimental com as fases imaturas de Amblyomma dissimile Koch, 1844 (Acari: Ixodidae) em Tropidurus torquatus (Lacertilia: Iguanidae) e Oryctolagus cuniculus

    L.H.T. Freitas; Faccini, J. L. H.; E DAEMON; M.C.A. Prata; D.M. Barros-Battesti

    2004-01-01

    Larvas provenientes de duas fêmeas de Amblyomma dissimile Koch, 1844 (Acari: Ixodidae), naturalmente ingurgitadas em uma iguana (Iguana iguana) e provenientes do Estado do Mato Grosso, foram utilizadas na infestação experimental de lagartos da espécie Tropidurus torquatus e coelhos domésticos. As larvas alimentadas em ambos os hospedeiros realizaram ecdise para ninfas. As ninfas apenas ingurgitaram no lagarto e mudaram para machos e fêmeas. Este é o primeiro registro do parasitismo de larvas ...

  1. Preliminary assays for efficiency avaliation of neem oil for control of Oligonychus yothersi (Acari: Tetranychidae) /
    Ensaios preliminares para avaliação da eficiência de óleo de neem no controle de Oligonychus yothersi (Acari: Tetranychidae)

    Renato C. Oliveira; Sandra M. J. Capelo; Amarildo Pasini

    2003-01-01

    The effect of a commercial formulation of the neem oil (azadirachtina) was evaluated in different stages of the biological cycle of the red mite of the paraguay tea Oligonychus yothersi (Acari: Tetranychidae). The formulation was shown efficient in the adults control, as well as it affected the fecundity of the females of the mite, however it didn’t inhabited oviposition, when the leaves were treated with the product.Avaliou-se o efeito de uma formulação comercial a base de neem (azadirachtin...

  2. Rhipicephalus sanguineus (Acari: Ixodidae, the brown dog tick, parasitizing humans in Brazil Rhipicephalus sanguineus (Acari: Ixodidae, o carrapato vermelho do cão, parasitando humanos no Brasil

    Filipe Dantas-Torres

    2006-02-01

    Full Text Available The objective of this paper is to describe four cases of human parasitism by Rhipicephalus sanguineus (Latrielle in Brazil. During an investigation regarding the species of ectoparasites of domestic dogs from the metropolitan region of Recife, Pernambuco state, four dog owners were found to be parasitized by ticks. The ticks were collected from these individuals and their dogs. All the ticks were identified as Rhipicephalus sanguineus . These are, to our knowledge, the first four cases of human parasitism by this tick species in Brazil. The possible implications of this finding are discussed here.O objetivo deste artigo é descrever quatro casos de parasitismo humano por Rhipicephalus sanguineus (Latrielle no Brasil. Durante uma investigação sobre as espécies de ectoparasitas de cães domésticos provenientes da Região Metropolitana de Recife, Pernambuco, quatro proprietários de cães foram encontrados parasitados por carrapatos. Foram coletados carrapatos dos indivíduos e de seus cães. Todos os carrapatos foram identificados como Rhipicephalus sanguineus, sendo, portanto, descritos os primeiros quatro casos de parasitismo humano por esta espécie de carrapato, no Brasil. Neste trabalho, são discutidas as possíveis implicações epidemiológicas deste achado.

  3. Modelos ambientales sobre la vejez

    Izal, María; Fernández-Ballesteros, Rocío

    1990-01-01

    La perspectiva ambiental en el estudio de la vejez es probablemente un ámbito poco conocido. En este trabajo se expone una revisión crítica de los principales modelos de explicación de las relaciones ambiente-conducta en la vejez. Finalmente, se discute sobre la superación de algunas limitaciones presentes en estas formulaciones teóricas, presentándose posibles alternativas teóricas y metodológicas para el desarrollo de esta área.

  4. COMENTARIOS SOBRE MEMORIA Y COMUNIDAD

    José A. Escalona Delfino

    2009-01-01

    El presente trabajo es una reflexión sobre aspectos esenciales en torno a la relación memoria-comunidad y su importancia para la investigación científica de las sociedades y los grupos humanos. Sin penetrar en profundidad en la trayectoria histórica del tema, ni en el tratamiento específico que importantes hombres de ciencia, considerados sus progenitores o procreadores, han dado a estos conceptos, hacemos particulares consideraciones con respecto al concepto de Memoria Histórica o Colectiva....

  5. Nota sobre Keynes y Brentano

    Crespo, Ricardo F.; IAE (Universidad Austral) y CONICET

    2013-01-01

    Este trabajo explora la posibilidad de una relación entre el pensamiento de John Maynard Keynes y el del filósofo alemán Franz Brentano (1839-1917) en los campos lógico y epistemológico. George E. Moore -profesor de Keynes- y Keynes mismo leyeron y alabaron el libro de Brentano El origen del conocimiento moral (1889). ¿Tomó Keynes algunas ideas lógicas o epistemológicas de Brentano? El trabajo sugiere que, a pesar de ciertas similitudes entre las ideas lógicas y sobre la verdad de Keynes y Br...

  6. Historicismo: notas sobre um paradigma

    José D’Assunção Barros

    2012-01-01

    Este artigo tem por objetivo desenvolver algumas considerações sobre o Historicismo e sua possibilidade de ser examinado como um dos paradigmas que concorrem para o estabelecimento de uma história científica no século XIX. O primeiro ponto tratado é relativo às origens do paradigma Historicista na transição do século XVIII para o século XIX. Na sequência, aproximamo-nos da apropriação conservadora do paradigma historicista no novo contexto no qual a burguesia européia está assentada no Poder,...

  7. Thomas Hobbes: sobre el miedo

    Carlos Bührle

    2004-01-01

    Este trabajo pretende echar cierta luz sobre el papel del miedo en el pensamiento político de Hobbes. Sabido es que esta pasión subyace al contrato social, en el sentido de que impulsa al hombre a abandonar el estado de naturaleza a fin de encontrar seguridad y de deshacerse de la amenaza de la muerte violenta. Teniendo en cuenta que el miedo y la muerte son inseparables en la filosofía de Hobbes, surge una pregunta fundamental: ¿hasta qué punto podemos decir que el miedo desaparece completam...

  8. Sobre la crisis financiera internacional

    Antonio Torrero Mañas

    2013-01-01

    Este trabajo es una reflexión sobre la crisis financiera internacional en la mitad de su sexto año. Respecto a la evolución de la crisis tengo una sensación agridulce. La parte positiva es que se ha evitado un descalabro inmediato de gran entidad. Mi mayor inquietud procede de los desequilibrios que pueden provocar las finanzas internacionales sin que exista ninguna institución moderadora y ordenadora de los flujos con un ámbito supranacional. Creo que una fuente válida de inspiración serí...

  9. Lumbalgias en hockey sobre cesped

    Rodríguez, Claudia

    2011-01-01

    Se realizó un estudio tomando como muestra a 84 jugadoras de hockey sobre hierba amateurs, mayores de 18 años de la primera categoría de la ciudad de Mar del Plata, en la cual el objetivo general fue determinar la incidencia del gesto deportivo en las lumbalgias de dichas jugadoras. El dolor lumbar tiene una alta prevalencia entre los deportistas, se ha relacionado con déficits en la fuerza extensora lumbar, y el hecho de padecerlo representa un obstáculo importante para la ...

  10. Entorno colaborativo sobre laboratorios remotos

    Grosclaude, Eduardo; Sznek, Jorge Eduardo; Ramos Garcia, Vicente; Bertogna, Mario Leandro; López Luro, Francisco; Zanellato, Claudio

    2006-01-01

    El proyecto de investigación Software para Procesos Colaborativos incluye una línea de acción sobre el desarrollo de experiencias en Laboratorios Remotos. Esta línea está dedicada a complementar las tareas de aprendizaje con un soporte tecnológico de sistemas, entendido como todas aquellas actividades de infraestructura que promuevan la disponibilidad de recursos y apoyen la escalabilidad de procesos en la tarea educativa apuntalada por tecnologías de información. En este trabajo se describe ...

  11. Environmentally associated ticks (Acari: Ixodidae in Campo Grande, Mato Grosso do Sul, Brazil Carrapatos (Acari: Ixodidae associados com o ambiente em Campo Grande, Mato Grosso do Sul, Brasil

    Marcos Valério Garcia

    2013-03-01

    Full Text Available Herein, we report tick species found on wild and domestic animals and in the environment during a one-year sampling period at the Brazilian Farming Research Company beef cattle unit (Embrapa Beef Cattle, which is located within the urban area of Campo Grande, Mato Grosso do Sul, Brazil. From 55 wild hosts including six different species (Nasua nasua, Cebus spp., Cerdocyon thous, Myrmecophaga tridactyla, Tamandua tetradactyla and Dasyprocta aguti, 323 ticks were collected. Amblyomma ovale ticks were found solely on coatis, and Amblyomma nodosum was identified solely on anteaters. No ticks were found on capuchin monkeys. However, Amblyomma cajennense was found on all parasitized host species with the exception of capuchin monkeys. Giant anteaters displayed the highest infestation abundance, with a mean of 53 ticks∕animal. Environmental sampling yielded 166 adult A. cajennense ticks. The tick species found on domestic animals (Rhipicephalus (Boophilus microplus, R. sanguineus, Dermacentor nitens and A. cajennense were those typically found on these hosts in Brazil. The most prevalent tick species, A. cajennense, was found on both wild and domestic animals and was also prevalent in the environment. Thus, this tick species is the primary vector that allows pathogens to bridge wild and domestic animals in the Cerrado.Neste trabalho são descritas as espécies de carrapatos de animais selvagens e domésticos e do ambiente coletados por um ano na EMBRAPA Gado de Corte localizado na área urbana de Campo Grande, Mato Grosso do Sul, Brasil. Dos 55 hospedeiros selvagens de seis espécies diferentes (Nasua nasua, Cebus spp., Cerdocyon thous, Myrmecophaga tridactyla, Tamandua tetradactyla e Dasyprocta aguti foram coletados 323 carrapatos. Amblyomma ovale foi encontrado apenas em quatis e Amblyomma nodosum apenas sobre tamanduás. Nenhum carrapato foi encontrado sobre macacos-prego. Por outro lado, Amblyomma cajennense foi encontrado em todos os hospedeiros

  12. Fitoseídeos (Acari: Phytoseiidae associados a cafezais e fragmentos florestais vizinhos Phytoseiids (Acari: Phytoseiidae associated to coffee plantations and adjacent forest fragments

    Ester Azevedo Silva

    2010-10-01

    Full Text Available Existem poucas informações sobre a fauna de ácaros predadores (Phytoseiidae em ambientes naturais brasileiros adjacentes a agroecossistemas cafeeiros (Coffea spp. ou sobre a influência que essa vegetação exerce como reservatório de ácaros predadores. Neste estudo, objetivou-se avaliar a diversidade destes organismos em cafeeiros e fragmentos florestais adjacentes. Coletaram-se amostras das espécies Calyptranthes clusiifolia (Miq. O. Berg (Myrtaceae, Esenbeckia febrifuga (A. St.-Hil. A. Juss. ex Mart. (Rutaceae, Metrodorea stipularis Mart. (Rutaceae e Allophylus semidentatus (Miq. Radlk. (Sapindaceae, em oito fragmentos florestais, de 5 a 51 ha, e cafezais adjacentes, nos meses de junho (final período chuvoso e outubro (final período seco nos anos 2004 e 2005, na região Sul do Estado de Minas Gerais. Ácaros foram extraídos das folhas, utilizando o método de lavagem e, em seguida, montados em lâminas de microscopia em meio de Hoyer, para identificação específica. No total foram identificados 2.348 fitoseídeos, sendo 2.090 nos fragmentos florestais e 258 espécimes nos cafezais adjacentes, pertencentes a 38 espécies. Servindo-se de análise faunística, a espécie Iphiseiodes zuluagai Denmark & Muma, 1972 apresentou os melhores índices no agroecossistema cafeeiro, sendo muito frequente e constante nas épocas estudadas. Nos fragmentos florestais Amblyseius herbicolus Chant, 1959, Iphiseiodes affs. neonobilis Denmark & Muma, 1978, Leonseius regularis DeLeon, 1965 e Euseius alatus DeLeon, 1966 foram dominantes, muito abundantes, muito frequentes e constantes nas épocas estudadas. Podemos concluir que a vegetação nativa abriga ácaros predadores, inimigos naturais de ácaros-praga, que ocorrem na cultura cafeeira, possibilitando o desenvolvimento de programas de manejo ecológico com áreas de vegetação natural e agroecossistemas cafeeiros adjacentes.There is little information about the fauna of predatory mites

  13. Seasonal variation of North American form of Gigantolaelaps mattogrossensis (Acari: Laelapidae) on marsh rice rat in southern coastal Texas.

    Carmichael, Joseph A; Strauss, Richard E; McIntyre, Nancy E

    2007-01-01

    The ectoparasites of a small mammal community within an intertidal zone in the upper Gulf coast region of Texas were studied to assess the seasonal variation in abundances of the mite Gigantolaelaps mattogrossensis (Fonseca) (Acari: Laelapidae) on the marsh rice rat, Oryzomys palustris (Harlan). Further study into the ecology and dynamics of this parasite-host relationship was deemed to be necessary to expand the understanding of these potential participants in the ecology of Bayou Hantavirus, an important causative agent of Hantavirus pulmonary syndrome. The objective of this study was to determine the effects of five predictor variables on mite abundance: prevalences of hosts, relative humidity, precipitation, temperature, and length of daylight. Mite abundance was modeled as a function of the five variables with analyses of variance and multiple regressions; however, because the predictor variables pertain to the sampling period rather than to the individual rodent host, the effective sample size was small and thus the sums of squares and cross products matrix was singular. We therefore developed and used a new method for estimating regression coefficients based on the "noise-addition method" (random residual variation) combined with a bootstrap step converting the reduced rank data to full rank, providing realistic estimates of confidence intervals for the regression statistics. The population abundances of mites fluctuated significantly across collecting periods. Humidity and precipitation were the most influential variables in explaining the variation in abundances of mites. Model interpretation suggests that G. mattogrossensis is a nidicolous parasite. These results provide a baseline understanding of the seasonal interactions between parasite and host. PMID:17294924

  14. Amblyomma hadanii n. sp. (Acari: Ixodidae), a tick from northwestern Argentina previously confused with Amblyomma coelebs Neumann, 1899.

    Nava, Santiago; Mastropaolo, Mariano; Mangold, Atilio J; Martins, Thiago F; Venzal, José M; Guglielmone, Alberto A

    2014-07-01

    All stages of Amblyomma hadanii n. sp. (Acari: Ixodidae) are described from northwestern Argentina. The diagnostic characters for males are a combination of the pattern of scutal ornamentation, basis capituli dorsally rectangular with cornua, coxa I with two subequal spurs (the internal wider, the external longer), coxae II-III with a single spur, coxa IV with a single spur not reaching level of anus, ventral plates irregular in shape (larger and sometimes with a small incision on festoons 4, 5 and 6) and hypostome spatulate with dental formula 3/3 in 7-8 rows. The diagnostic characters for the females are a combination of scutal ornamentation, postero-lateral margins of scutum slightly convex, coxa I with two subequal spurs (the internal wider, the external longer), basis capituli dorsally rectangular, porose areas rounded, genital aperture U-shaped, and hypostome spatulate with dental formula 3/3 in 7-8 rows. Diagnosis of nymphs can be performed by a combination of basis capituli rectangular, scutum with large punctations in the lateral fields and small punctations in the central field, and cervical groove short and ending as a small shallow depression at the eye level. Larvae are diagnosed by the shape of basis capituli, scutum with with posterior margin slightly convex, and legs with coxa I with 2 triangular spur (the external longer than the internal), and with coxae II and III each with 1 triangular spur. The hosts recorded for this new tick species are Tapirus terrestris (Linnaeus), horse, cattle, dog and humans. Analyses of a 410 bp fragment of the mitochondrial 16S rRNA gene and the complete sequence of the nuclear 18S rRNA gene supported the description of A. hadanii as a new species. PMID:24935128

  15. Genetic diversity and population structure of Panonychus citri (Acari: Tetranychidae), in China based on mitochondrial COI gene sequences.

    Yuan, Ming-Long; Wei, Dan-Dan; Zhang, Kun; Gao, Yu-Zhen; Liu, Yong-Hua; Wang, Bao-Jun; Wang, Jin-Jun

    2010-12-01

    The citrus red mite, Panonychus citri (McGregor) (Acari: Tetranychidae), is regarded as one of the most important citrus pests in many countries, such as Japan, Spain, and China. In this study, the mitochondrial cytochrome oxidase subunit I gene was used to analyze genetic diversity and population structure of 15 P. citri populations collected from three citrus (Citrus spp.) planting regions of China. Our analysis found that these populations had relatively low genetic diversities. Bayesian tree and haplotype network showed that the 22 haplotypes of P. citri formed two lineages with low Bayesian posterior probabilities (0.55 and 0.63), and haplotypes in a sample were scattered throughout the Bayesian tree, indicating that there may be no significant genealogical structure among populations. However, when Yuxi and Danjiangkou populations (both without H7 haplotype) were excluded from the analysis, analysis of molecular variance found a weak, but significant, geographic structuring. Mantel test indicated a significant and positive correlation between genetic and geographical distances, reflecting certain degree of isolation by distance. The genetic differentiation based on pairwise F(ST) was not significant between most populations, and some F(ST) were even negative, indicating remarkable gene flow among these populations. The weak population structure of P. citri in this study was probably influenced by high gene flow between some populations due to long-distance dispersal of this species, which may be largely relied on the movement of plants between populations. The mismatch distribution analysis showed that no signal of population growth, but the Fu's F(S) value was significantly negative for total populations and the star-like shape of haplotype network, suggesting a history of population expansion of P. citri in China. PMID:21309245

  16. Laboratory evaluation of a native strain of Beauveria bassiana for controlling Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae).

    Immediato, Davide; Camarda, Antonio; Iatta, Roberta; Puttilli, Maria Rita; Ramos, Rafael Antonio Nascimento; Di Paola, Giancarlo; Giangaspero, Annunziata; Otranto, Domenico; Cafarchia, Claudia

    2015-09-15

    The poultry red mite, Dermanyssus gallinae (De Geer, 1778) (Acari: Dermanyssidae) is one of the most economically important ectoparasites of laying hens worldwide. Chemical control of this mite may result in environmental and food contamination, as well as the development of drug resistance. High virulence of Beauveria bassiana sensu lato strains isolated from naturally infected hosts or from their environment has been demonstrated toward many arthropod species, including ticks. However, a limited number of studies have assessed the use of B. bassiana for the control of D. gallinae s.l. and none of them have employed native strains. This study reports the pathogenicity of a native strain of B. bassiana (CD1123) against nymphs and adults of D. gallinae. Batches of nymph and adult mites (i.e., n=720 for each stage) for treated groups (TGs) were placed on paper soaked with a 0.1% tween 80 suspension of B. bassiana (CIS, 10(5), 10(7) and 10(9) conidia/ml), whilst 240 untreated control mites for each stage (CG) were exposed only to 0.1% tween 80. The mites in TG showed a higher mortality at all stages (p<0.01) when compared to CG, depending on the time of exposure and the conidial concentration. A 100% mortality rate was recorded using a CIS of 10(9) conidia/ml 12 days post infection (DPI) in adults and 14 DPI in nymphs. B. bassiana suspension containing 10(9) conidia/ml was highly virulent towards nymph and adult stages of D. gallinae, therefore representing a possible promising natural product to be used in alternative or in combination to other acaricidal compounds currently used for controlling the red mite. PMID:26206607

  17. Selection of Entomopathogenic Fungi to Control Varroa destructor (Acari: Varroidae Selección de Hongos Entomopatógenos para el Control de Varroa destructor (Acari: Varroidae

    Marta Rodríguez

    2009-12-01

    Full Text Available The aim of this work was select entomopathogenic fungi tolerant to temperatures inside the brood area of honey bees (Apis mellifera for to control Varroa destructor. For this purpose, 50 Beauveria bassiana (Balsamo Vuillemin and 48 Metarhizium anisopliae (Metschn. Sorokin isolates were evaluated at 30 and 35 ºC. For each isolate, colony discs of 5 mm with mycelium were placed in the center of a Petri dish with Sabouraud dextrose agar (SDA medium. The dishes were incubated at 30 and 35 °C, without light. Radial growth of each colony was measured daily. All the B. bassiana and M. anisopliae isolates presented a lineal growth rate at a temperature of 30 ºC. However, at 35 ºC, most of the isolates did not grow, except three B. bassiana and 14 M. anisopliae isolates (P El objetivo de este trabajo fue seleccionar hongos entomopatógenos tolerantes a las temperaturas del nido de cría de las abejas (Apis mellifera, para ser utilizados en el control de Varroa destructor. Se evaluaron 50 aislamientos de Beauveria bassiana (Balsamo Vuillemin y 48 de Metarhizium anisopliae (Metschn. Sorokin a temperaturas de 30 y 35 ºC. Discos de agar de 5 mm de diámetro con micelio de colonias de cada aislamiento, se depositaron en el centro de placas Petri con medio agar Sabouraud dextrosa (ASD. Las placas fueron incubadas a 30 y 35 °C y oscuridad y diariamente se midió el radio de cada colonia. Todos los aislamientos de B. bassiana y M. anisopliae var. anisopliae presentaron una tendencia lineal a través del tiempo a temperaturas de incubación de 30 °C. A 35 °C la mayoría de los aislamientos no crecieron, excepto tres aislamientos de B. bassiana y 14 de M. anisopliae (p < 0,001. Estos aislamientos fueron seleccionados para realizar pruebas de patogenicidad sobre V. destructor, aplicando una suspensión de 10(7 conidias mL-1. El aislamiento más efectivo fue Qu-M845 de M. anisopliae (p = 0,0033, produjo una mortalidad de 85%. La capacidad patogénica de este

  18. On GAMER, plataforma de continguts sobre videojocs

    Villegas Bonachera, José Ricardo

    2015-01-01

    Desenvolupament d'una plana web amb disseny responsiu sobre videojocs en català a partir del gestor de continguts WordPress. Desarrollo de una página web con diseño responsivo sobre videojuegos en catalán a partir del gestor de contenidos WordPress. Bachelor thesis for the Multimedia program on Computer Science.

  19. Recursos y enlaces sobre comunidades de aprendizaje

    Ferrer Esteban, Gerard

    2005-01-01

    Obras y artículos sobre el proyecto Comunidades de Aprendizaje desarrollado en el Estado español. Tesis doctorales sobre comunidades de aprendizaje. Fundamentación teórica de las comunidades de aprendizaje. Sitios en Internet relacionados con las comunidades de aprendizaje y proyectos afines de desarrollo comunitario en contextos escolares.

  20. First description of the nymph and larva of Dermacentor compactus Neumann, 1901 (Acari: Ixodidae), parasites of squirrels (Rodentia: Sciuridae) in southeast Asia.

    Apanaskevich, Dmitry A

    2016-05-01

    Recent reexamination of collection lots stored in the United States National Tick Collection revealed adult specimens of Dermacentor compactus Neumann, 1901 (Acari: Ixodidae) reared from field-collected nymphs, which allowed us to associate field-collected unidentified nymphs and larvae with this species. Nymphs of D. compactus can be easily distinguished from those of other congeneric species by the shape of the scutum and spiracular plate, the hypostome dentition, and the size of the spurs on the coxae. Larvae of this species can be distinguished by the shape and sculpture of the scutum, the shape of basis capituli, the absence of auriculae, and the size of the spurs on coxae II and III. Both nymphs and larvae feed mostly on various species of squirrels (Rodentia: Sciuridae). Considerably fewer nymphs and larvae were found on murid rodents (Rodentia: Muridae), domestic dogs (Carnivora: Canidae), and a snake (Squamata: Colubridae). PMID:27095664

  1. Historicismo: notas sobre um paradigma

    José D’Assunção Barros

    2012-08-01

    Full Text Available Este artigo tem por objetivo desenvolver algumas considerações sobre o Historicismo e sua possibilidade de ser examinado como um dos paradigmas que concorrem para o estabelecimento de uma história científica no século XIX. O primeiro ponto tratado é relativo às origens do paradigma Historicista na transição do século XVIII para o século XIX. Na sequência, aproximamo-nos da apropriação conservadora do paradigma historicista no novo contexto no qual a burguesia européia está assentada no Poder, combinando-se com a consolidação dos modernos estados-nações. A especificação das características deste paradigma constituem o principal ponto de análise

  2. Ensaio sobre Saramago = Essay on Saramago

    Weigert, Sergio

    2013-01-01

    Partindo da obra de José Saramago, Ensaio sobre a Cegueira, constrói-se o “Ensaio sobre Saramago” sob perspectiva filosófica, fundamentada particularmente em Fredric Jameson. A interrupção da quotidianidade, matéria do desenvolvimento do conteúdo, faz aflorar a hipótese da temporalidade congelada, suporte da argumentação do teórico. Levanta-se a discussão sobre Modernidade e Pós-Modernidade da obra de Saramago, avançando no recurso da ironia, não como alicerce, mas como teia que tece, envolve...

  3. Somos un envase : Discursos sobre el aborto

    Löcher, Jennifer Irene

    2014-01-01

    No hay persona que no tenga opinión acerca del asunto y, cada vez más, la sociedad argentina debate sobre la pregunta de si se debe legalizar/despenalizar el aborto o no. Nunca antes se habló tanto sobre el tema públicamente: se publican artículos en los diarios, hay manifestaciones a favor y hay manifestaciones en contra de la legalización del aborto. El siguiente trabajo pretende relevar y analizar discursos que circulan socialmente alrededor del debate sobre el aborto. (Párrafo extraíd...

  4. Concepciones sobre la docencia universitaria de calidad

    Arbeláez López, Ruby; Fortes del Valle, M. Carmen; Grau Rubio, Claudia

    2008-01-01

    Con esta investigación hemos querido participar en el proceso de búsqueda y construcción del sentido de calidad aplicado a la docencia universitaria, con el objetivo general de evidenciar las concepciones sobre docencia de calidad que pueden deducirse de los procesos de evaluación de los profesores universitarios. Nuestra meta final intenta propiciar la revisión de las políticas educativas y el enriquecimiento de la cultura sobre docencia y sobre evaluación docente. La mayor aportación de nue...

  5. Puente sobre el Oosterschelde, Holanda

    Hoving, H. T.

    1967-03-01

    Full Text Available This new bridge, forming part of the Delta project, is made of concrete, and was built by successive overhangs. Precast units were mainly used. The bridge is 5,000 m long, and is 11.85 m wide. The main spans are 95 m in length, except one, which can be opened up to sea traffic, which is 40 m long. The free height of the bridge over the sea is 15 m, which is insufficient for large ships. This required that one of the spans, in deep water, should open up, on hinges, and provide free passage to large ships. The intermediate bridge supports are of special interest. They rest on piles which go down to 38 m. They are hollow, cylindrical, of 4.35 m external diameter, and are driven into the ground in several stages, as they penetrate through the sands at the bottom of the Oosterschelde. To drive them in, an excavating device, inside the pile, was utilised, and also a dredging and suction mechanism, to clean out the bottom, and allow the piles to sink by gravity. But when external friction did not allow this to happen, the piles were weighed down with up to 500 tons of ballast. A series of three of these piles, in a row, makes up each bridge support. A cross member over the pile heads supports, in turn, the bridge deck. The bridge was built in successive sections, overhanging from each support, and then finally connected with a central portion. Use of precast units has been very extensive, so that the bridge can be justiaflably regarded as being prefabricated.Este nuevo puente, que forma parte del Plan de obras denominadas del Delta, es de hormigón y se ha construido por el procedimiento de voladizos sucesivos, utilizando, en su mayor parte, elementos prefabricados. Tiene una longitud total de 5.000 m; una anchura de 11,85 m; tramos principales de 95 m de luz, salvo uno, levadizo, que tiene 40 m. La altura libre sobre las ag^uas del mar es de 15 m, que es insuficiente para las naves de gran tonelaje; esto exigió que uno de sus tramos, en aguas

  6. Puente sobre el rio Medway

    Freeman, Fox, Ingenieros

    1963-02-01

    have been prestressed both longitudinally and transversally. Between the two circulation roadways an elastic barrier has been placed, supported on metal posts.El puente sobre el río Medway tiene la misión de salvar dicho río en el nuevo trazado de carretera necesario para aliviar el denso tráfico estival entre Dower y Londres. Está situado en las proximidades de la ciudad de Rochester. La estructura se ha construido utilizando las vías de concurso. De todos los tipos presentados se eligió una estructura de hormigón armado. La longitud total de la obra es de 1.000 m. Los tres tramos principales de la obra salvan el río. El central es de 152 m de luz, y los dos adyacentes son de 103 m cada uno. Los accesos tienen un total de 18 tramos, que arrojan una longitud de 654 m. La anchura del puente es de 34 m, y la calzada se ha subdividido en dos direcciones de tráfico de 7,30 m cada una y, además, se han dejado dos espaldones laterales de 2,40 m de anchura. En planta se puede admitir que el puente tiene una alineación recta con una ligerísima curva, y que en el plano vertical presenta una pendiente de desagüe entre las pilas 9 y 10. Los estribos son de hormigón armado: tipo celular el del este y de hormigón en masa el del oeste. Los estribos se apoyan sobre pilotes hexagonales de hormigón armado cuya circunferencia circunscrita tiene 55 cm de radio y de 12 a 20 m de longitud. Cuando el firme se hallaba a profundidades inferiores a 6 m, los estribos se cimentaban directamente sobre el firme. Las pilas constituyen pórtico y tienen una altura variable de 9 a 30 m sobre el nivel del suelo. Los tramos de acceso forman una estructura continua simplemente apoyada. Cada tramo se compone de ocho vigas longitudinales de 30 a 41 m de longitud y de 190 toneladas cada una. Estas vigas son del tipo pretensado y prefabricado. El tramo central es del tipo cantilever, constituido por dos brazos, de 30 m de longitud, formados por vigas cajón. Cada una de estas vigas consta

  7. PERSPECTIVAS INFANTILES SOBRE LA TERRITORIALIDAD

    Noelia Enriz

    2009-12-01

    Full Text Available En este trabajo nos proponemos un acercamiento a las diversas ideas infantiles sobre el territorio habitado, en el contexto particular de la población mbyá guaraní de Misiones. La fragilidad territorialidad a la que es expuesta la población indígena en Argentina se manifiestan cotidianamente en diversas áreas. La población mbyá, ha sido surcada por los límites de los estados nacionales de Paraguay, Brasil y Argentina. La sedentarización y los cercamientos de tierras en los diferentes estados, han impulsado transformaciones de las lógicas de subsistencia, de habitación y organización comunitaria. En el caso de la provincia de Misiones la acreditación burocrática de los títulos de tierras se encuentra aplazada, el estado no se compromete con la concreción de este derecho.

  8. Sobre a psicopatologia dos atos

    Roberto Calazans

    2015-07-01

    Full Text Available Este artigo pretende apresentar a psicopatologia dos atos a partir do esquema de Jacques Lacan sobre a angústia. Diferenciamos os acting-out, a passagem ao ato, os sintomas, as inibições e a angústia fazendo uma duplicação do esquema de Lacan levando em consideração os registros do simbólico, do real e do imaginário. Esse esquema permite uma abordagem da questão dos atos do sujeito sem cair em uma perplexidade do clínico, nem na confusão entre os atos e a ação. Permite também uma melhor orientação do clínico em relação às diversas modalidades de respostas subjetivas que não se restringem à questão sintomática, que é o campo inaugural da clínica psicanalítica desde a sua fundação por Sigmund Freud. Acreditamos contribuir, assim, para um maior esclarecimento desse esquema no ensino de Lacan e para que ele possa servir de orientação para o tratamento dos atos do sujeito na clínica.

  9. Estudo multicasos sobre atividades inovativas

    Sonia Regina Hierro Parolin

    2013-09-01

    Full Text Available Em estudos sobre competitividade argumenta-se que as empresas necessitam de estratégias baseadas em inovações e de capacidades internas em constantes e intensas transformações, não somente nos padrões tecnológicos, mas também no encadeamento do processo de gestão das atividades inovativas, como processos dinâmicos, não lineares e diversificados, em função de múltiplos fatores dos ambientes interno e externo. Para contribuir com essas discussões, neste artigo apresenta-se um estudo multicasos em quatro indústrias de médio e grande portes, de segmentos, densidades tecnológicas e históricos com inovações diferentes entre si. Como principais resultados, salientam-se o encadeamento das atividades inovativas como parte de uma estratégia organizacional para obter resultados com inovação e a afluência de todas as pessoas, e não somente as alocadas em pesquisa e desenvolvimento, para o cumprimento dessa estratégia.

  10. El Impuesto sobre Sociedades - Tema 5

    Andrés Aucejo, Eva

    2008-01-01

    El Impuesto sobre Sociedades: Hecho imponible. Sujeto pasivo. Imputación temporal de ingresos y gastos. Régimen de transparencia fiscal. La base imponible: Ingresos computables, partidas deducibles y no deducibles. Reinversión de beneficios extraordinarios.

  11. Los derechos de autor sobre obtenciones vegetales

    Rosario Silva Gilli

    2015-01-01

    Full Text Available Contenido: Las creaciones en la agricultura. Los derechos de autor sobre obtenciones vegetales. El Convenio Internacional para la protección de las obtenciones vegetales (París 1961 y sus revisiones de Ginebra 1972, 1978,1991 Objeto de la protección legal. Condiciones del cultivar. Alcance de la protección. La protección de obtenciones vegetales en el Mercosur. Los Derechos de autor en el Mercosur. El Protocolo de Armonización de normas sobre Propiedad Intelectual en el Mercosur. El Acuerdo de Cooperación y facilitación sobre la protección de las obtenciones vegetales en los Estados Partes del Mercosur.  Alcance de la normativa Mercosur. Los Derechos sobre cultivares en Uruguay. Los Derechos de autor como derechos humanos. ¿Derechos de autor vs. derecho de propiedad intelectual? Reflexión final

  12. PERSPECTIVAS INFANTILES SOBRE LA TERRITORIALIDAD

    NOELIA ENRIZ

    2009-12-01

    Full Text Available In this paper we propose a different approach to children's ideas about the geographical area in the particular context of the Mbyá Guarani population, from Misiones (Argentine. The territorial fragility, that is exposed to the indigenous people in Argentina aremanifested daily in several areas. Mbyá population, has been crossed by the boundaries of national states of Paraguay, Brazil and Argentina. The sedentary and enclosures land processes in different states, have prompted changes in the logic of subsistence, housing and community organization. In Misiones province case, bureaucratic accreditation of land titles is postponed, the state is not committed to the realization of this right.RESUMEN: En este trabajo nos proponemos un acercamiento a las diversas ideas infantiles sobre el territorio habitado, en el contexto particular de la población mbyá guaraní de Misiones. La fragilidad territorialidad a la que es expuesta la población indígena en Argentina se manifiestan cotidianamente en diversas áreas. La población mbyá, ha sido surcada por los límites de los estados nacionales de Paraguay, Brasil y Argentina. La sedentarización y los cercamientos de tierras en los diferentes estados, han impulsado transformaciones de las lógicas de subsistencia, de habitación y organización comunitaria. En el caso de la provincia de Misiones la acreditación burocrática de los títulos de tierras se encuentra aplazada, el estado no se compromete con la concreción de este derecho.

  13. Consideraciones preliminares sobre la credibilidad

    Fernando Verdugo

    2004-01-01

    Full Text Available A modo de introducción al Seminario Interno de Profesores de la Facultad de Teología de la PUC, el autor recuerda, en primer lugar, lo que suele entenderse por "credibilidad" y, también, algunos de los criterios generales por los cuales algo o alguien adquiere la calidad de creíble (el que sea razonable, relevante o significativo, capaz de producir gozo estético, etc.. Luego, en la parte más extensa, el autor vuelve a llamar la atención sobre la necesidad de atender a los condicionamientos culturales de la fe cristiana. La fe, al igual que toda experiencia humana, está culturalmente mediada. Tomar conciencia de ese hecho y asumir las consecuencias metodológicas es indispensable para una teología que quiere poner atención a los desafíos actuales y contribuir así a la credibilidad del cristianismoThis article reprints the introductory session to the internal seminar of lecturers from the Faculty of Theology of the UC. In the first place, the author sums up what is usually understood by `credibility' and the general criteria through which something or someone gains credibility (being reasonable, relevant or significant, capable of producing aesthetic pleasure. Then the author deals at length with the need to take notice of the cultural conditionings of the Christian faith. The faith, the same as any other human experience, is culturally mediated. It is crucial for theology to become aware of this fact and come to terms with its methodological consequences, if it wants to face current challenges and so contribute to the credibility of Christianity

  14. Canis familiaris, UN NUEVO HOSPEDERO DE Ornithodoros (A. puertoricensis FOX, 1947 (ACARI: IXODIDA EN COLOMBIA

    BEJARANO EDUAR E. E.

    2009-04-01

    Full Text Available

    RESUMEN

    Las garrapatas revisten gran importancia en el campo biomédico por sus hábitos hematófagos y asociación con la transmisión de agentes patógenos a humanos y animales. El objetivo de esta investigación fue establecer las especies de garrapatas que parasitan perros en tres poblaciones del área rural del Caribe colombiano. Durante los meses de agosto y diciembre del año 2006 se realizó búsqueda activa de garrapatas sobre caninos domésticos de las localidades de El Campín, Sabanas del Potrero y Escobar Arriba, departamento de Sucre. Las garrapatas recolectadas fueron almacenadas en viales con etanol al 70% e identificadas empleando claves morfológicas de referencia para cada familia. Para la determinación de especie en la familia Argasidae se realizaron estimaciones morfométricas de estructuras externas. Se recolectaron 420 garrapatas a partir de 50 caninos infestados, de un total de 134 perros examinados, que corresponde a una tasa de infestación del 37,3%. Las garrapatas fueron identificadas como Rhipicephalus sanguineus, Rhipicephalus (Boophilus microplus y Amblyomma ovale pertenecientes a la familia Ixodidae, y Ornithodoros (Alectorobius puertoricensis de la familia Argasidae. La especie predominante fue R. sanguineus (92,1% en los estados de larva, ninfa y adulto, seguida por larvas de O. puertoricensis, que fueron halladas en menor número sobre caninos de las tres localidades. Se registra, por primera vez en América, el parasitismo de O. puertoricensis sobre caninos domésticos y se confirma su presencia en Colombia.

    Palabras clave

  15. Ocorrência de Ornithonyssus bursa (Berlese, 1888 (Acari: Macronyssidae em filhotes de Megascops choliba (corujinha-do-mato e Pitangus sulphuratus (bem-te-vi, no Rio Grande do Sul, Brasil Ocurrence of Ornithonyssus bursa (Berlese, 1888 (Acari: Macronyssidae on Megascops choliba (tropical screech-owl and Pitangus sulphuratus (great kiskadee nestlings in the Rio Grande do Sul State, Brazil

    Carolina S. Mascarenhas

    2009-12-01

    Full Text Available O Núcleo de Reabilitação da Fauna Silvestre e Centro de Triagem de Animais Silvestres da Universidade Federal de Pelotas - RS atendeu dois filhotes de Megascops choliba (corujinha-do-mato (Strigiformes - Strigidae e dois de Pitangus sulphuratus (bem-te-vi (Passeriformes - Tyrannidae intensamente parasitados por ácaros, em maio de 2005 e dezembro de 2006, respectivamente. Os filhotes e o ninho de P. sulphuratus foram recolhidos na zona urbana da cidade de Pelotas - RS após forte temporal. Os ácaros foram removidos, colocados em álcool 70% e levados ao laboratório de parasitologia para identificação. Os espécimes foram clarificados em lactofenol, montados em meio de Hoyer e identificados como Ornithonyssus bursa (Acari - Macronyssidae. Registra-se Megascops choliba e Pitangus sulphuratus como hospedeiros de Ornithonyssus bursa, no Rio Grande do Sul, Brasil.The Center for Rehabilitation of Wildlife and Center for Selection of Wild Animal of the Federal University of Pelotas has attended two nestlings of Megascops choliba (tropical screech-owl (Strigiformes - Strigidae and two of Pitangus sulphuratus (great kiskadee (Passeriformes - Tyrannidae heavily parasitized by mites, in May 2005 and December 2006, respectively. The nestlings and the nest of P. sulphuratus were collected in the Pelotas urban area after severe storms. The mites were removed, clarified in lactofenol, permanently mounted in Hoyer's medium and identified as Ornithonyssus bursa (Acari - Macronyssidae. Megascops choliba and Pitangus sulphuratus are reported as host of Ornithonyssus bursa in Rio Grande do Sul State, Brazil.

  16. Gestión Integrada de la araña roja Tetranychus urticae Koch (Acari: Tetranychidae): optimización de su control biológico en clementinos

    Sá Argolo, Poliane

    2012-01-01

    La araña roja, Tetranychus urticae Koch (Acari: Tetranychidae) es una de las plagas más perjudiciales que afectan los huertos de clementinos en España. En los clementinos, T. urticae habita en el envés de las hojas, donde produce tela y colonias densas. Absorbe el contenido de las células, causando manchas cloróticas en el lado superior de las hojas. Al final del ernao T. urticae puede provocar en los frutos icatrices características y en consecuencia, pérdida de su valor comercial. Hasta la ...

  17. DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD

    Sayuri P. Tamura M.

    2001-01-01

    Full Text Available «Disertación sobre equidad y justicia» es básicamente una respuesta a una inquietud en particular que yo tenía sobre las distintas posiciones que existen sobre estos dos temas y cómo definir cuál es la más acertada. Hice una descripción del punto de vista de Amartya Sen –la violación de los derechos sobre la propiedad privada es justificable si evitan las hambrunas2– frente al de Robert Nozick –la propiedad privada es un derecho fundamental y como tal debe ser respetado3–, sin embargo, aunque ambos enfoques son totalmente contrarios tienen mucho sentido, por lo cual es bastante difícil decidirse por uno en particular. Fue de esta forma, enfrentando sus opiniones, que yo logré desarrollar una posición frente a estas dos perspectivas, y así dar mi opinión al DISERTACIÓN SOBRE JUSTICIA Y EQUIDAD SAYURI P. TAMURA M. Estudiante de Economía y Negocios Internacionales de la Universidad ICESI. respecto. Al final, llegué a una conclusión, que aunque no es la más original y tampoco es la única, tiene mucho sentido y seguramente de ser posible, la situación del país podría cambiar para bien.

  18. Impacto psicosocial del Downsizing sobre los trabajadores

    CRISTÓBAL JIMÉNEZ JIMÉNEZ

    2006-01-01

    Full Text Available El presente trabajo intenta ahondar en lo expuesto en un trabajo anterior sobre el downsizing como fenómeno psicosociolaboral, analizando su impacto psicosocial. En primer lugar, se exponen los diferentes niveles de comprensión de este fenómeno, para pasar al análisis de los efectos y consecuencias sobre las personas, diferenciando entre dos tipos de víctimas: a los que se van de la organización (despedidos y b los que se quedan en la organización (supervivientes, prestando especial atención a lo que se conoce ya como el "síndrome del superviviente", para lo que se aporta información sobre sus características, las variables moderadoras que intervienen y los modelos explicativos del mismo. Se termina con algunas consideraciones sobre la actualidad y relevancia de dicho síndrome sugiriendo la idea de que el fenómeno del downsizing y sus consecuencias sobre las personas nos enfrenta a lo que podríamos ya considerar como un nuevo síndrome de la Psicopatología Laboral: el síndrome del superviviente.

  19. Ensaio sobre Saramago = Essay on Saramago

    Weigert, Sergio

    2013-01-01

    Full Text Available Partindo da obra de José Saramago, Ensaio sobre a Cegueira, constrói-se o “Ensaio sobre Saramago” sob perspectiva filosófica, fundamentada particularmente em Fredric Jameson. A interrupção da quotidianidade, matéria do desenvolvimento do conteúdo, faz aflorar a hipótese da temporalidade congelada, suporte da argumentação do teórico. Levanta-se a discussão sobre Modernidade e Pós-Modernidade da obra de Saramago, avançando no recurso da ironia, não como alicerce, mas como teia que tece, envolvendo tecido e artista.

  20. Impacto psicosocial del Downsizing sobre los trabajadores

    CRISTÓBAL JIMÉNEZ JIMÉNEZ; JOSÉ LUIS SÁNCHEZ LAGUNA

    2006-01-01

    El presente trabajo intenta ahondar en lo expuesto en un trabajo anterior sobre el downsizing como fenómeno psicosociolaboral, analizando su impacto psicosocial. En primer lugar, se exponen los diferentes niveles de comprensión de este fenómeno, para pasar al análisis de los efectos y consecuencias sobre las personas, diferenciando entre dos tipos de víctimas: a) los que se van de la organización (despedidos) y b) los que se quedan en la organización (supervivientes), prestando especial atenc...

  1. Principios sobre semáforos

    VALENCIA ALAIX, VÍCTOR GABRIEL

    2000-01-01

    Debido a la ausencia de una publicación que reuniese los aspectos más relevantes sobre semáforos y en el marco académico sobre ingeniería de tránsito de los cursos de pregrado y posgrado en Vías y Transporte de la Universidad Nacional de Colombia - Sede Medellín, se ha preparado este documento como guía introductoria a dicho tema. En su preparación se han recogido los tópicos principales de varias publicaciones internacionales y nacionales, además, su desarrollo ha considerado la experi...

  2. Rastros: dizendo sobre os fazeres/dizeres

    MELLO MARISOL BARENCO CORRÊA DE

    2001-01-01

    Com vistas ao aclaramento de noções erroneamente herdadas do contexto social e histórico da cultura moderna ocidental, que teve/tem como um de seus projetos o "apagamento" do sujeito, ou o distanciamento entre os sujeitos e suas formas de fazer, dizer, pensar, este artigo pretende contribuir com elementos para a construção de um outro paradigma nas ciências humanas. Trata-se de um relato sobre o processo de construção de nossa própria pesquisa, articulado à reflexão sobre as diversas formas d...

  3. Sobre la esclavitud: libro de artista

    MACHADO JIMÉNEZ, ALBERTO

    2015-01-01

    Sobre la esclavitud es un libro de artista, donde encontraremos imágenes acompañadas de breves frases que hacen referencia al tema propuesto en cada ilustración para que así se pueda comprender mejor la intención de este trabajo, reflexionar sobre la manera que tenemos de ver las cosas, en este caso, con respecto a la esclavitud. Dar a conocer distintas formas de ser esclavo en este sistema sería uno de los objetivos principales. Hacer litografías, dibujos con el uso de acua...

  4. Consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente

    Caridad Ramos Alvariño

    2004-01-01

    En el presente trabajo se exponen algunas consideraciones sobre diferentes procesos productivos y sus consecuencias sobre el medio ambiente. La disminución del impacto negativo de algunas producciones sobre el medio ambiente es favorable, pero el problema va más allá y de lo que se trata es de la necesidad de una transformación sostenible de las producciones que puedan conducir a una vida agradable y una naturaleza conservada entre otras muchas cuestiones que agobian hoy al mundo. La solución...

  5. Acaricidal properties of vetiver essential oil from Chrysopogon zizanioides (Poaceae) against the tick species Amblyomma cajennense and Rhipicephalus (Boophilus) microplus (Acari: Ixodidae).

    Campos, Roseane Nunes de Santana; Nascimento Lima, Cecília Beatriz; Passos Oliveira, Alexandre; Albano Araújo, Ana Paula; Fitzgerald Blank, Arie; Barreto Alves, Péricles; Nascimento Lima, Rafaely; Albano Araújo, Vinícius; Santana, Alisson Silva; Bacci, Leandro

    2015-09-15

    Ticks are arthropods widely distributed in tropical and subtropical regions, which can transmit infectious agents also responsible for zoonoses. Excessive use of conventional acaricides has resulted in the onset of drug resistance by these parasites, thus the need to use alternative methods for their control. This study evaluated the acaricidal activities of Chrysopogon zizanioides (vetiver) essential oils containing different zizanoic and khuzimol (high and low acidity) acid concentrations on Amblyomma cajennense and Rhipicephalus microplus (Acari: Ixodidae). To this aims, toxicity tests of different concentrations of examined essential oils were conducted on adult females and larval stages. Results showed that the essential oils of C. zizanioides with high and low acidity reduced oviposition of females, eggs hatch and larval survival, being more effective than some commercial products widely used to control these ectoparasites. These results indicate that the C. zizanoides essential oils are promising candidates as acaricidal agents and represent also an add value to vetiver oil with high acidity, which is commercially undervalued in the cosmetic industry. PMID:26359641

  6. Repellency of oils of lemon eucalyptus, geranium, and lavender and the mosquito repellent MyggA natural to Ixodes ricinus (Acari: Ixodidae) in the laboratory and field.

    Jaenson, Thomas G T; Garboui, Samira; Palsson, Katinka

    2006-07-01

    MyggA Natural (Bioglan, Lund, Sweden) is a commercially available repellent against blood-feeding arthropods. It contains 30% of lemon-scented eucalyptus, Corymbia citriodora (Hook.) K. D. Hill & L. A. S. Johnson (Myrtaceae), oil with a minimum of 50% p-menthane-3,8-diol. MyggA Natural also contains small amounts of the essential oils of lavender, Lavandula angustifolia Mill. (Lamiaceae), and geranium, Pelargonium graveolens L'Her. (Geraniaceae). In laboratory bioassays, MyggA Natural and C. citriodora oil exhibited 100% repellency against host-seeking nymphs of Ixodes ricinus (L.) (Acari: Ixodidae). Lavender oil and geranium oil, when diluted to 1% in 1,2-propanediol, had weak repellent activities on I. ricinus nymphs, but when diluted to 30% in 1,2-propanediol had 100% repellencies. 1,2-Propanediol (100%) had no significant repellent activity in comparison with that of the control. In field tests in tick-infested areas in central Sweden, tick repellency of MyggA Natural and C. citriodora oil was tested by the blanket-dragging technique for 4 d during a 6-d period. The repellencies (74 and 85%, respectively) on day 1 are similar (89%) to that of blankets treated in a similar manner with 19% diethyl-methyl-benzamide, based on previous work. Repellencies declined significantly from day 1 to day 6 (74 to 45% for MyggA Natural; 85 to 42% for C. citriodora oil). PMID:16892632

  7. Acaricidal activity of Annonaceae fractions against Tetranychus tumidus and Tetranychus urticae (Acari: Tetranychidae and the metabolite profile of Duguetia lanceolata (Annonaceae using GC-MS

    Dejane Santos Alves

    2015-12-01

    Full Text Available Species of the Tetranychus genus feed on plant tissues, which reduces the rate of photosynthesis and can lead to the death of plant tissues. As a result, considerable production losses are caused by these arthropods. Thus, in order to aid in the development of new products for the control of Tetranychus tumidus Banks and Tetranychus urticae Koch (Acari: Tetranychidae, the initial objective of this study was to select Annonaceae derived fractions that were soluble in dichloromethane and have acaricidal activity. Then, an exploratory analysis of the metabolite profile of the most successful fraction was performed by gas chromatography-mass spectrometry (GC-MS. Among the dichloromethane soluble fractions derived from Annona cacans Warm., Annona coriacea Mart., Annona neolaurifolia H. Rainer, Annona sylvatica A.St.-Hil., Duguetia lanceolata A.St.-Hil., Guatteria australis A.St.-Hil., Xylopia brasiliensis Spreng., Xylopia emarginata Mart. and Xylopia sericea A.St.-Hil., only the fraction from D. lanceolata stem bark reduced the survival of T. tumidus females. However, ovicidal activity was not detected when D. lanceolata stem bark was evaluated against T. tumidus eggs. Further, we studied the effect of dichloromethane soluble fractions from D. lanceolata leaves, berry fruits and stem bark on T. urticae, and the stem bark was found to be the most active fraction against T. urticae. The metabolite profile analysis of D. lanceolata stem bark by GC-MS, suggested that the main constituents were 2,4,5-trimethoxystyrene and trans-asarone.

  8. Population structure and dynamics of the cassava green mite Mononychellus tanajoa (Bondar and the predator Euseius ho (DeLeon (Acari: Tetranychidae, Phytoseiidae

    Evila C. Costa

    2012-06-01

    Full Text Available Population structure and dynamics of the cassava green mite Mononychellus tanajoa and the predator Euseius ho (Acari: Tetranychidae, Phytoseiidae. Cassava is attacked by several pests, among which the cassava green mite Mononychellus tanajoa. Predatory mites of the family Phytoseiidae are major natural enemies of pestmites and are naturally found inhabiting cassava plants in the field. We evaluated the temporal variation of the developmental stages of M. tanajoa and the most abundant predatory mite in cassava fields in the study region, the phytoseiid Euseius ho. Densities of all developmental stages of M. tanajoa were low during the rainy season, increasing over the cultivation cycle of cassava and peaking in the dry season. Overall, the larval stage of M. tanajoa presented the lowest densities throughout time. Densities of all developmental stages of E. ho were low and remained constant throughout the cultivation cycle of cassava. The number of eggs, nymphs and adults of M. tanajoa was higher in comparison to the larval stage whereas there were no differences in densities of the stages of E. ho. Densities of all developmental stages of M. tanajoa were negatively correlated with precipitation. Densities of the stages of egg, nymph and adult of M. tanajoa were positively related while the stage of larva was negatively related to temperature. We conclude that it is important to consider the population structure in studies of population dynamics of arthropods as each developmental stage experiences and responds uniquely to the local environment over time.

  9. First Record of Amblyomma ovale (Koch, 1844 (Acari: Ixodidae parasitizing Lontra longicaudis (Olfers, 1818 (Carnivora: Mustelidae in Santa Catarina Island, Florianópolis, Sc, Brazil

    Bibiana Verdin De Andrade

    2015-04-01

    Full Text Available Three female and one male Amblyomma ovale (Acari: Ixodidae were found parasitizing a neotropical otter (Lontra longicaudis (Carnivora: Mustelidae in Florianópolis, SC, Brazil. This is the first record of the occurrence of A. ovale in Santa Catarina Island and the second report of this ectoparasite in a mustelid species in Brazil. A. ovale has been reported in wild carnivores in several Brazilian states and is considered one of the main predominant species of the Atlantic rainforest. The Amblyomma ticks are primarily responsible for the spread of BSF in humans. Among the species of Amblyomma infesting dogs is the A. ovale and the proximity between man and the dog favors the parasite sharing. Santa Catarina Island has many rural and wild environments shared by domestic animals, especially dogs, such as the environment where the otter was found in this study. Proper determination of tick species and their distribution in different geographical regions is essential for the understanding of the epidemiology of Rickettsiosis.

  10. Sobre o natural e o actor

    Tavares, Margarida

    2010-01-01

    Neste artigo, procura-se reflectir sobre o conceito de natural quando aplicado ao trabalho do actor. Parte-se de quatro relevantes textos da dramaturgia ocidental, a saber: Hamlet, de Shakespeare; Crítica da ‘Escola das mulheres’ e O improviso de Versalhes, de Molière; e O teatro cómico, de Goldoni.

  11. Las fuentes cristianas sobre Jesús

    Melero Martínez, J.M.

    2010-01-01

    Full Text Available El artículo es una presentación de las fuentes históricas sobre Jesús de Nazaret: fuentes sinópticas, fuente Q, fuentes afines a la gnosis, fragmentos de evangelio con material sinóptico o joánico, evangelios judeocristianos y otras fuentes.

  12. Sobre un sistema no lineal de epidemias

    Ortega S., Luis

    2012-01-01

    Un modelo sobre epidemias que describe la población infectada y la población susceptible de ser infectada en el cual se toma en consideraci6n el efecto de difusión es el siguiente: [Formula Matemática].

  13. Diferentes visões sobre a cidade

    Veriano Takuji Miura

    2010-06-01

    Full Text Available A paisagem urbana sempre exerceu um fascínio sobre os homens. Ela tem sido, ao mesmo tempo, sonho e pesadelo de um tempo. Em diferentes momentos, a paisagem urbana tem sido abordada de modo a expressar as singularidades de seu tempo. Nesse sentido, o objetivo deste artigo é trazer uma discussão sobre as diferentes visões da cidade propostas por acadêmicos, cineastas e romancistas. Desde a visão romantizada das cidades da Idade Média, de Ítalo Calvino, até as “cidades virtuais” de Pierre Lévy, destaca-se o longo percurso da chamada “aventura da modernidade”.

  14. El problema de Steklov sobre el cono

    Óscar Andrés Montaño Carreño

    2012-01-01

    Sea (Mn, g) un cono de altura 0 ≤ xn+1 ≤ 1 en R n+1, dotado con una métrica rotacionalmente invariante 2ds2 + f 2 (s)dw2 , donde dw2 representa la métrica estándar sobre S n−1 , la esfera unitaria (n − 1)-dimensional. Supongamos que Ric(g) ≥ 0. En este artículo demostramos que si h > 0 es la curvatura media sobre ∂M y ν1 es el primer valor propio del problema de Steklov, entonces ν1 ≥ h. Abstract. Let (Mn, g) be a cone of height 0 ≤ xn+1 ≤ 1 in R ...

  15. Neopolares de problemas de empaquetamiento sobre semigrupos

    Aráoz Durand, Julián Arturo

    1982-01-01

    Los neopolares permiten caracterizar las caras de un poliedro combinatorio como vértices de poliedros altamente estructurados. Esto sirve para generar planos de cortes y para obtener propiedades duales en problemas de programación entera. Gomory caracterizó neopolares para problemas sobre grupos, Aráoz en "Polyhedral Neopolarities" extendió estos resultados a semigrupos de cubrimiento. En este trabajo se caracterizan neopolares importantes de semigrupos de empaquetamiento que incluyen los pro...

  16. Consideraciones sobre la motricidad del violinista

    Allende, Pablo

    2009-01-01

    Comienza la exposición hablando de que intenta prevenir las patologías en los violinistas mediante secuencias de ejercicios específicos, de diferentes técnicas corporales y fisioterapéuticas. Presenta datos estadísticos sobre el índice de patologías que se encuentran entre estos intérpretes para por último presentar tablas de ejercicios propiamente dichas para intentar paliar estas dolencias

  17. Productos derivados sobre bienes de consumo

    Francisco Venegas Martinez; Salvador Cruz Ake

    2010-01-01

    Este trabajo de investigacion desarrolla un modelo de equilibrio general con expectativas racionales en tiempo continuo util para la determinacion de precios de contratos forward, contratos futuros, bonos cupon cero y opciones europeas (de compra y venta) sobre bienes de consumo. Para ello, el modelo considera un individuo representativo en una economia con dos bienes, los cuales son producidos con tecnologias estocasticas. Por ultimo, el modelo propuesto permite examinar estrategias para obt...

  18. Apuntes sobre la flora gallega, XVII

    Amigo Vázquez, Javier; Pulgar Sañudo, Íñigo

    2005-01-01

    Presentamos un nuevo capítulo dentro de la serie de contribuciones al conocimiento actualizado de la Flora de Galicia, aportando información de interés corológico sobre 11 taxa recolectados: Bidens frondosa L., Crypsis alopecuroides (Piller & Mitterp.) Schrad., Cyperus fuscus L., Cyperus michelianus (L.) Link, Dittrichia graveolens (L.) Desf., Echinochloa crus-galli (L.) P. Beauv. subsp. hispidula (Retz.) Honda, Eragrostis curvula (Schrad.) Nees, Hypericum hirsutum L., Lindernia dubia (L.) Pe...

  19. Reflexiones sobre el concepto de justicia

    Víctor C. Pascual Planchuelo

    2005-06-01

    Full Text Available Este ensayo constituye una reflexión sobre el concepto de Justicia. No se centra, como tantos estudios al respecto, en el plano teórico y metafísico, sino que atiende problemas de mayor actualidad: la opinión de los ciudadanos, la postura de los profesionales y otros asuntos controvertidos del ámbito del Derecho.

  20. Flutuação populacional e sintomas de dano por ácaros (Acari) em seringueira no Estado do Mato Grosso, Brasil Population fluctuation and mite (Acari) damage symptoms in rubber trees in the State of Mato Grosso, Brazil

    Noeli Juarez Ferla; Gilberto José de Moraes

    2008-01-01

    Apesar da grande importância da cultura da seringueira (Hevea brasiliensis Muell. Arg.) para o Brasil, pouco se conhece sobre a flutuação populacional dos ácaros nessa cultura. O objetivo deste trabalho foi estudar a flutuação populacional de ácaros na seringueira no Estado do Mato Grosso, bem como observar a evolução dos sintomas de ataque de tais pragas nessa planta. O estudo foi conduzido em campos de seringueira de Itiquira e Pontes e Lacerda, Estado do Mato Grosso, com seis clones: FX 38...

  1. A review of the ticks (Acari, Ixodida of Brazil, their hosts and geographic distribution - 1. The State of Rio Grande do Sul, Southern Brazil

    Evans DE

    2000-01-01

    Full Text Available A review of the ticks (Acari, Ixodida of the State of Rio Grande do Sul, southern Brazil, was completed as a step towards a definitive list (currently indicated as 12 of such species, their hosts and distribution. The ticks: Argas miniatus (poultry, Ixodes loricatus (opossums, Amblyomma aureolatum (dogs, A. calcaratum (anteaters, A. cooperi (capybaras, A. nodosum (anteaters, A. tigrinum (dogs (Neotropical and Rhipicephalus sanguineus (dogs (introduced, cosmopolitan, Afrotropical were confirmed as present, in addition to the predominant, Boophilus microplus (cattle (introduced, pan-tropical, Oriental. Of the further 18 species thus far reported in the literature as present in the state, but unavailable for examination: only Ornithodoros brasiliensis (humans and their habitations (Neotropical, Ixodes affinis (deer (Nearctic/Neotropical and I. auritulus (birds (Nearctic/Neotropical/Afrotropical/ Australasian are considered likely; 13 species would benefit from corroborative local data but the majority appear unlikely; reports of A. maculatum (Nearctic/Neotropical, but circum-Caribbean are considered erroneous; the validity of A. fuscum is in doubt. The very recent, first known report of the tropical Anocentor nitens (horses(Nearctic/Neotropical, but still apparent absence of the tropical A. cajennense (catholic (Nearctic/Neotropical and the sub-tropical/temperate Ixodes pararicinus (cattle (Neotropical in Rio Grande do Sul are important for considerations on their current biogeographical distribution and its dynamics in South America. The state has relatively long established, introduced ("exotic", Old World tick species (B. microplus, R. sanguineus that continue to represent significant pests and disease vectors to their traditional, introduced domestic animal hosts, cattle and urban dogs. There are also indigenous, New World ticks (A. miniatus, O. brasiliensis, A. aureolatum, A. nitens, as both long established and possibly newly locally

  2. Suppression of host-seeking Ixodes scapularis and Amblyomma americanum (Acari: Ixodidae) nymphs after dual applications of plant-derived acaricides in New Jersey.

    Jordan, Robert A; Dolan, Marc C; Piesman, Joseph; Schulze, Terry L

    2011-04-01

    We evaluated the ability of dual applications of natural, plant-derived acaricides to suppress nymphal Ixodes scapularis Say and Amblyomma americanum (L.) (Acari: Ixodidae) in a Lyme disease endemic area of New Jersey. An aqueous formulation of 2% nootkatone provided >90% control of I. scapularis through 7 d. Control declined to 80.9% at 14 d, and a second application was made that provided >95% control through the remaining 4 wk of the nymphal season. Nootkatone provided >90% control of A. americanum through 35 d postapplication. Applications of 2% carvacrol and EcoTrol T&O resulted in rapid knockdown of both tick species, but control declined significantly to 76.7 and 73.7%, respectively, after 14 d when a second application was made that extended control of both tick species to between 86.2 and 94.8% at 21 d. Subsequently, control declined steadily in all plots by 42 d postapplication except for I. scapularis in carvacrol-treated plots, where levels of control >90% were observed through 35 d. Of the three compounds tested, 2% nootkatone provided the most consistent results, with 96.5 and 91.9% control of I. scapularis and A. americanum through 42 and 35 d, respectively. The ability of plant-derived natural products to quickly suppress and maintain significant control of populations of these medically important ticks may represent a future alternative to the use of conventional synthetic acaricides. In addition, the demonstrated efficacy of properly-timed backpack sprayer application may enable homeowner access to these minimal-risk acaricides. PMID:21510219

  3. A sustained release gel formulation of doramectin for control of lone star ticks (Acari: Ixodidae) and horn flies (Diptera: Muscidae) on cattle.

    Lohmeyer, K H; Miller, J A; Pound, J M; Klavons, J A

    2009-04-01

    A gel formulation formed by incorporating technical doramectin into a 10% hydroxypropyl methylcellulose aqueous solution was used to subcutaneously inject steers at varying dosages. Doramectin serum concentration of steers receiving 600 microg (AI)/kg body weight declined from 21.9 ppb at 0.5 wk to below detectable at 8 wk postinjection. The 1,200 microg (AI)/kg injection resulted in serum concentrations of 29.1 ppb at 0.5 wk and declined to 0.5 ppb at 8 wk postinjection. Both the 600 and 1,200 microg (AI)/kg injections provided 100% inhibition of index of fecundity (IF) in adult lone star ticks, Amblyomma americanum L. (Acari: Ixodidae) through week 8, after which inhibition declined to 79.4 and 45.3%, respectively, during the 12th week posttreatment. For steers treated at 600 microg (AI)/kg, mortality of adult horn flies, Hematobia irritans L. (Diptera: Muscidae), declined from 16.9% during week 2 to 3.1% during week 7 postinjection. The blood from steers treated at 1,200 microg (AI)/kg resulted in a similar decline in mortality of blood fed adult horn flies from 29.4% during week 1 to 4.0% during week 7. The 600 microg (AI)/kg treatment provided complete control of larval horn flies in the manure for 9 wk, whereas the 1,200 microg (AI)/kg injection gave complete control for 14 wk posttreatment. The doramectin gel formulation provided long-lasting delivery of doramectin to cattle and extended control of lone star ticks and larval horn flies. Such a simple and inexpensive formulation could be useful in tick eradication programs by reducing the frequency of gathering cattle. PMID:19449664

  4. Sampling method evaluation and empirical model fitting for count data to estimate densities of Oligonychus perseae (Acari: Tetranychidae) on 'Hass' avocado leaves in southern California.

    Lara, Jesús R; Saremi, Naseem T; Castillo, Martin J; Hoddle, Mark S

    2016-04-01

    Oligonychus perseae (Acari: Tetranychidae) is an important foliar spider mite pest of 'Hass' avocados in several commercial production areas of the world. In California (USA), O. perseae densities in orchards can exceed more than 100 mites per leaf and this makes enumerative counting prohibitive for field sampling. In this study, partial enumerative mite counts along half a vein on an avocado leaf, an industry recommended practice known as the "half-vein method", was evaluated for accuracy using four data sets with a combined total of more than 485,913 motile O. perseae counted on 3849 leaves. Sampling simulations indicated that the half-vein method underestimated mite densities in a range of 15-60 %. This problem may adversely affect management of this pest in orchards and potentially compromise the results of field research requiring accurate mite density estimation. To address this limitation, four negative binomial regression models were fit to count data in an attempt to rescue the half-vein method for estimating mite densities. These models were incorporated into sampling plans and evaluated for their ability to estimate mite densities on whole leaves within 30-tree blocks of avocados. Model 3, a revised version of the original half-vein model, showed improvement in providing reliable estimates of O. perseae densities for making assessments of general leaf infestation densities across orchards in southern California. The implications of these results for customizing the revised half-vein method as a potential field sampling tool and for experimental research in avocado production in California are discussed. PMID:26861068

  5. Pensamiento ciceroniano sobre el rol del ciudadano en la obra “Sobre los deberes”

    Luis Diego Brenes Villalobos

    2013-01-01

    Full Text Available : El ensayo repasa -en los orígenes del republicanismo- el aporte realizado por uno de sus autores clásicos más importante, Marco Tulio Cicerón. En concreto, se revisa la visión de este sobre el rol del ciudadano y el concepto de ciudadanía como intrínsecamente ligada a la República y a la concepción del humanismo. Al efecto, el ensayo se centra en la obra “Sobre los deberes” (De officiis.

  6. ALGUNAS CONSIDERACIONES SOBRE GUARDA Y CUIDADO

    Antonio A. Salomón Salomón; Yusleidys Arteaga Gónzalez; Beatriz Figueraz González; Diosbel Fuentes Guilarte

    2011-01-01

    Desde comienzos del segundo tercio del pasado siglo, la mayor parte de los ordenamientos jurídicos se ocuparon de reformar el derecho de familia. Las nuevas concepciones sociales sobre la familia estaban fuertemente inspiradas en el principio de igualdad acogido por la Organización de Naciones unidas. La igualdad de los cónyuges y las relaciones de igualdad de los progenitores respecto a los hijos encontró un respaldo jurídico para fundamentar las reformas del derecho de familia en la igualda...

  7. Productos derivados sobre bienes de consumo

    Francisco Venegas Martínez; Salvador Cruz Ake

    2010-01-01

    Este trabajo de investigación desarrolla un modelo de equilibrio general con expectativas racionales en tiempo continuo útil para la determinación de precios de contratos forward , contratos futuros, bonos cupón cero y opciones europeas (de compra y venta) sobre bienes de consumo. Para ello, el modelo considera un individuo representativo en una economía con dos bienes, los cuales son producidos con tecnologías estocásticas. Por último, el modelo propuesto permite examinar estrategias para o...

  8. Observaciones sobre colostomía

    Escobar T., Jaime; Castro, Augusto de; Peñalosa, Federico

    2011-01-01

    Se hace una revisión sobre 133 casos de colostomías hechas en pacientes del Hospital San Juan de Dios de Bogotá en un período de cinco años; el 43.7 por ciento de los casos eran heridas por arma de fuego. La mortalidad global fue de 16.5 por ciento. La colostomía derivativa, en ASA, ha bajado la mortalidad en las heridas de colon en dicho hospital.

  9. Avances sobre bases de datos no convencionales

    Arroyuelo, Jorge; Esquivel, Susana Cecilia; Grosso, Alejandro; Ludueña, Verónica; Reyes, Nora Susana; Chávez, Edgar; Navarro, Gonzalo

    2014-01-01

    En la actualidad han surgido, debido a los avances alcanzados en tecnologías de información y comunicación, aplicaciones no tradicionales sobre bases de datos de todo tipo de datos, valga la redundancia. Éstos pueden ser imágenes, texto libre, secuencias de ADN, audio, video, etc., pueden estar o no estructurados y provenir de diversas fuentes (satélites, telescopios, revistas, fotografías, música, etc.), como también ser de diferentes tamaños, generalmente muy grandes. Por otro lado, las con...

  10. Literatura infantil sobre problemas infantiles: la diabetes

    Lázaro Fernández, Patricia

    2015-01-01

    Debido al creciente número de casos de diabetes infantil que se está dando en la sociedad actual, no es raro encontrarse en las aulas cada vez más casos de esta enfermedad. Por esta razón, he decidido analizar dos libros sobre esta temática, para hacer un acercamiento del material seleccionado a las aulas y poder desarrollar junto con los niños un aprendizaje colectivo y cooperativo. En este trabajo se expone la importancia de la literatura y la literatura infantil como una ...

  11. Algunas reflexiones sobre la supervivencia empresarial

    Sarabia Alzaga, José María

    1995-01-01

    Dos bloques-tópico, bien conocidos, configuran el esquema lógico de las reflexiones que se proponen. El primero de ellos se centra en nuestra realidad global: el entorno; el segundo, en los impactos que éste ha generado en la empresa, exponiendo una síntesis contrastada -y hoy día vigente- sobre cómo las empresas de éxito están consiguiendo sobrevivir. Como conclusión, se sintetizan algunas ideas o lineas generales de actuación que pudieran ayudar a mejorar o reforzar las propias experiencias...

  12. Sentencias Constitucionales sobre la muerte digna

    Serrano, J. M.

    2006-01-01

    La sentencia comentada ha sido considerada como relevante en la discusión sobre el derecho a la vida en relación con la eutanasia. Sin embargo, las peculiaridades del caso qeu le dio origen y la propia argumentación del tribunal la alejan d euna interpretación relevante en torno a los dos tópicos del derecho a la vida y a la dignidad. Por el contrario la sentencia resulta decepcionate en su argumentación más propia. Primero respecto a la propia huelga de hambre que condena sin matices en rela...

  13. Consideraciones sobre de la ética

    Enrique Cantolla Bernal

    2005-01-01

    El presente ensayo muestra como el hombre, a través de la historia, a estado constantemente buscando beneficios para su vida y ha debido cumplir con varias tareas, que con el tiempo han dado origen a costumbres y comportamientos que han llevado a constituir la moral y la ética. Esta última, nos permite definir y determinar los principales fines de la vida del hombre y cuales son los principios y normas que lo rigen. Así, el estudio de la ética nos plantea la interrogante sobre "los fines de l...

  14. Recursos sobre propiedad intelectual en internet

    Sorli Rojo, Ángela; Merlo Vega, José Antonio

    2001-01-01

    El concepto de propiedad intelectual, entendido en su sentido más amplio, englobaría todos los aspectos relacionados con los derechos que se obtienen de una creación, tanto en su forma original, como de sus posibles reproducciones y transformaciones. En este trabajo se recopilan y analizan una serie de fuentes de información accesibles en Internet sobre este tema. No obstante, la idea de propiedad intelectual no coincide plenamente con la de propiedad industrial, que es mucho m...

  15. Efecto de masticar chicle sobre la halitosis

    De Luca Monasterios, Fiorella; Chimenos Küstner, Eduardo; López López, José

    2014-01-01

    Fundamento y objetivo: Este estudio pretende estimar la prevalencia de halitosis oral en una población joven y mostrar el efecto del chicle sobre el aliento. Pacientes y método: Estudio prospectivo de campo descriptivo correlacional, de corte transversal. Se seleccionaron a conveniencia 121 jóvenes, de los que 98 concluyeron el estudio, el cual se realizó en el Hospital Odontológico Universitario-Universidad de Barcelona. El protocolo consistió en: cuestionario, evaluación clínica oral, prueb...

  16. Soportes apoyados sobre vigas pretensadas (EE. UU.

    Editorial, Equipo

    1965-12-01

    Full Text Available This work has been awarded a prize by the Prestreesed Concrete Institute. It refers to a number of flyovers on the Arroyo Seco, of California. This river has been canalized, to help drainage in case of heavy rainfall. The canal runs through a highly populated zone, and a motor road and accessory ramps had to cross the canal. The resulting design involves three prestressed girders, lightly arched in a parabolic outline, resting on each river shore, running along the line of the bridge, over the canal. It was decided that the bridge piles should not rest on the river bed, in order not to reduce its flow capacity. The girders of a maximum length of 39 ms, are box shaped, and stiffened with thin diaphragms. The cylindrical pile, 1.50 m in diameter, is an integral part of the girder, and applies to it a concentrated load of about 4000 tons. The girders rest on reinforced concrete cubes, which in turn are supported by concrete slabs and piles driven into the soil.Esta obra ha sido premiada por el Prestressed Concrete Institute y se refiere a una serie de pasos superiores sobre el Arroyo Seco, en California, que se ha canalizado para servir de desagüe en el caso de avenidas torrenciales. El canal se halla en una zona de edificación densa y se trata del paso—sobre aquél—de una autopista y rampas de acceso. La solución adoptada consistió en tres vigas pretensadas, ligeramente arqueadas con perfil parabólico, apoyadas en las dos márgenes y situadas en correspondencia con los tres soportes, sobre el propio canal, ya que ninguno de aquéllos debía apoyarse en el lecho de este último al objeto de no disminuir su capacidad de desagüe. Las vigas—de unos 39 m de longitud la mayor—son del tipo cajón, rigidizadas con unos diafragmas de pequeño espesor. El soporte cilíndrico, de 1,50 m de diámetro, se solidariza con la viga y le transmite una notable carga concentrada, del orden de 4.000 toneladas. Los apoyos de estas vigas son simples dados

  17. Comentarios sobre dibujo analítico

    Mata Botella, Elena

    2004-01-01

    Cuaderno de apoyo a la docencia del DIBUJO DE ARQUITECTURA que pretende hacer reflexionar al alumno (de primero o segundo de carrera) sobre un tipo de dibujo que aquí se ha llamado “dibujo analítico”. Un dibujo que a través de operaciones gráficas y conceptuales como la esquematización y la selección de información, tiende a alejarse de la descripción del objeto arquitectónico para adentrarse en determinados aspectos o dimensiones que subyacen en el proyecto arquitectónico. Unas notas intr...

  18. Claves sobre el poder de las mujeres

    García de León Álvarez, María Antonia

    2012-01-01

    El objeto de este texto es esbozar una síntesis sobre algunos nudos de mi obra en el área de Género y Poder. El estudio del poder es un punto de partida ineludible para abordar todo tema de Género, es decir, es necesario arrancar desde la comprensión del fenómeno social del poder, ya que el Patriarcado es un sistema estructurado de poder por género. Este punto de partida indica la relevancia del tema (nada más ni nada menos que el poder, tema clave en las Ciencias Sociales).

  19. Mapping sobre arquitecturas heterogéneas

    De Giusti, Laura Cristina

    2008-01-01

    La programación de algoritmos paralelos, a diferencia de los algoritmos secuenciales, no cuenta para su representación con un único modelo. Esa carencia ocasiona que su aplicación sobre una arquitectura heterogénea, a través de modelos existentes, no halle el resultado que se ambiciona. La computación paralela ha propuesto, como pocas, significativos quiebres en el ámbito de la Ciencia de la Computación, al provocar la reformulación y generación de nuevos conceptos. El desarrollo de nuevos mo...

  20. Sobre la hiperinflación peruana

    Oscar Dancourt; Ivory Yong

    1989-01-01

    El propósito de este artículo es contar una historia que ya ha sido muy bien contada en otras circunstancias: la historia de las hiperinflaciones. La deuda que tenemos con esa literatura económica clásica (Van Walre de Bordes (1924), Keynes (1971), Bresciani-Turroni (1968); Schacht (1927), Graham (1930). Robinson (1976)) no puede contabilizarse ni en una bibliografía, ni en unas cuantas citas. También debemos mucho a la literatura maierrta sobre las hiperinflaciones (especialmente Cagan (1967...

  1. Nota sobre Phelipaea reuteriana Rchb. F. (Orobanchaceae)

    Pujadas-Salvá, Antonio J.; Crespo Villalba, Manuel Benito

    2006-01-01

    Recientemente se ha demostrado que Phelipaea reuteriana Rchb. f. es el nombre prioritario para Orobanche tunetana Beck, habiéndose rescatado aquél en el género Phelipanche Pomel (= Orobanche sect. Trionychon Wallr.). En la presente nota, sobre la base de los datos moleculares accesibles, se discute la conveniencia de separar las distintas secciones de Orobanche en géneros independientes y, por el contrario, se propone la nueva combinación Orobanche reuteriana (Rchb. f.) M.B. Crespo & A. Pujad...

  2. Notas sobre Phelipaea reuteriana Rchb. f. (Orobanchaceae)

    Crespo Villalba, Manuel Benito; Pujadas Salvá, Antonio

    2006-01-01

    Recientemente se ha demostrado que Phelipaea reuteriana Rchb. f. es el nombre prioritario para Orobanche tunetana Beck, habiéndose rescatado aquél en el género Phelipanche Pomel (= Orobanche sect. Trionychon Wallr.). En la presente nota, sobre la base de los datos moleculares accesibles, se discute la conveniencia de separar las distintas secciones de Orobanche en géneros independientes y, por el contrario, se propone la nueva combinación Orobanche reuteriana (Rchb. f.) M.B. Crespo & A. Pujad...

  3. El tullido. Un cuento sobre los cuentos

    Fernández-Urtasun, R. (Rosa)

    2005-01-01

    Este artículo realiza una lectura literaria y simbólica de El tullido, uno de los cuentos de Christian Andersen que pasó desapercibido entre los relatos que se publicaron tras su muerte. El relato del argumento va acompañado de una reflexión sobre los temas que aparecen recogidos en el texto: las tradiciones orales, la belleza del arte, la esperanza, la creación, la importancia de la escritura y de la lectura, la esencia de la literatura.

  4. Notas sobre envidia, equilibrio y optimalidad

    Cristini, Marcela; Chisari, Omar Osvaldo

    1980-01-01

    Demostramos aquí -aún para coeficientes de producción distintos de la unidad- la suficiencia de las características del equilibrio para determinar el efecto aludido sobre la situación de ambos agentes. Damos otra condición suficiente, que no supone necesariamente el equilibrio; generalizamos los resultados a un número mayor de consumidores y deducimos propiedades del óptimo de Pareto, definido como aquella situación en la que no es posible mejorar el nivel de utilidad de un agente sin reducir...

  5. Puntualizaciones sobre el concepto de latencia

    Bortolazzo, Antonela

    2007-01-01

    El presente escrito revisa un concepto elaborado por Freud, como es la noción de Período de latencia sexual. Antes de hacer explícito el enfoque desde el cual será abordado quisiera mencionar que, lo que a continuación se desarrolla se enmarca en el trabajo de investigación que sobre el concepto de Latencia realiza, desde hace catorce años, la Cátedra de Psicología Evolutiva I, de la cual formo parte. En esta oportunidad me propongo indagar el concepto de latencia en el marco de la teoría ...

  6. Futuros: estudo de caso sobre futuros cambiais

    Santo, Paula Cristina Rosa da Silva Espírito

    2010-01-01

    Mestrado em Contabilidade A presente dissertação foi realizada com vista à obtenção do grau de mestre em Contabilidade pelo Instituto Superior de Contabilidade e Administração de Lisboa. Para o desenvolvimento desta dissertação foi escolhido o tema “Contratos de Futuros”. Em termos estruturais esta monografia divide-se em duas partes. Na primeira parte faz-se uma exposição sobre o tema os “Futuros”. Na segunda parte é apresentado o trabalho de investigação que foi desenvolvido. Na...

  7. Reflexiones sobre contabilidad privada y contabilidad nacional

    José Arturo Gutiérrez

    1995-01-01

    Se discuten las interrelaciones de la contabilidad privada y la contabilidad nacional, insistiendo en sus condicionantes internos contradictorios en relación con la sobredeterminación de la formación económico-social vigente. En relación con ello se introduce la reflexión sobre la unidad contradictoria entre empresa y capital, esto es, la base técnica frente a su determinante socioeconómico, conflicto que la propia contabilidad privada expresa: al describir el capital aporta necesariamente el...

  8. Consideraciones criminológicas sobre las bandas juveniles

    Medina, Juanjo, Ralphs, Robert, Aldridge, Judith

    2010-01-01

    Este artículo ofrece una serie de reflexiones originales sobre la definición de las bandas juveniles y resume algunos de los debates claves en el campo de investigación sobre bandas. En particular, se presta especial atención a los estudios sobre la relación entre bandas y delincuencia, las teorías que explican la formación de las bandas y los factores que empujan a los jóvenes a vincularse a las mismas, los estudios sobre respuestas de política criminal a este fenómeno, ...

  9. Más sobre Abalone y algo sobre tuercas: los tetrahexos

    Rupérez, José Antonio; García, Manuel

    2012-01-01

    Comentamos los problemas planteados en anterior artículo sobre jugadas del ABALONE, describiéndolo de nuevo y presentamos el puzle de los Polihexos, fácil de construir y entretenido de resolver; útil para plantear ejercicios de combinatoria y simetrías.

  10. Debate sobre estudios postcoloniales y subalternos

    David Morris

    2001-01-01

    Full Text Available A partir de los comentarios a la reseña elaborada por Ian S. Mclean sobre el libro: Cuerpos incas y el cuerpo de Cristo. El Corpus Christi en Cuzco colonial, Perú, escrito por Carolyn Dean, surge un debate sobre los Estudios Postcoloniales y Subalternos, que se desarrolló entre el 12 de agosto y el 3 de septiembre de 2001, a través de la lista de correo electrónico de H-Latam, grupo de discusión dedicado a la historia latinoamericana. En él participaron destacados especialistas en el tema, quienes analizaron, entre otras cuestiones, el uso de la jerga y las formas de escritura, la novedad de sus planteamientos, sus influencias filosóficas y epistemológicas, su pretensión de captar el punto de vista de los vencidos y subordinados, la pertinencia de unas ideas originalmente desarrolladas para el estudio del colonialismo inglés y luego aplicadas al colonialismo español en América Latina.

  11. El problema de Steklov sobre el cono

    Óscar Andrés Montaño Carreño

    2012-12-01

    Full Text Available Sea (Mn, g un cono de altura 0 ≤ xn+1 ≤ 1 en R n+1, dotado con una métrica rotacionalmente invariante 2ds2 + f 2 (sdw2 , donde dw2 representa la métrica estándar sobre S n−1 , la esfera unitaria (n − 1-dimensional. Supongamos que Ric(g ≥ 0. En este artículo demostramos que si h > 0 es la curvatura media sobre ∂M y ν1 es el primer valor propio del problema de Steklov, entonces ν1 ≥ h. Abstract. Let (Mn, g be a cone of height 0 ≤ xn+1 ≤ 1 in R n+1, endowed with a rotationally invariant metric 2ds2 + f 2 (sdw2 , where dw2 represents the standard metric on S n−1 , the (n − 1-dimensional unit sphere. Assume Ric(g ≥ 0. In this paper we prove that if h > 0 is the mean curvature on ∂M and ν1 is the first eigenvalue of the Steklov problem, then ν1 ≥ h.

  12. Sobre la aplicabilidad del Principialismo Norteamericano

    Pablo Requena Meana

    2008-01-01

    Full Text Available La propuesta de cuatro principios prima facie que Beauchamp y Childress han sugerido para la bioética (el principialismo se ha impuesto como uno de los paradigmas más seguidos, no sólo en los Estados Unidos, sino también en muchas otras partes del mundo. Este modelo ha sido criticado desde distintos puntos de vista, sobre todo en los últimos quince años. Una de las mayores objeciones que se hace al principialismo es la dificultad de aplicar la propuesta a los casos de la vida real. El problema de fondo está en que, a la falta de jerarquización de principios, se suma la ausencia casi total de indicaciones antropológicas sobre los bienes morales que deberían proteger dichos principios. El resultado es que ante un dilema ético se pueden sacar conclusiones opuestas, según se utilice un principio u otro. Los autores proponen como instrumentos para superar estos conflictos la especificación y ponderación de los principios y reglas morales; pero, en bastantes casos, no resultan suficientes.

  13. Avaliação in vitro da eficácia de acaricidas sobre Boophilus microplus (Canestrini, 1887 (Acari: Ixodidae de bovinos no município de Ilhéus, Bahia, Brasil In vitro valuation of acaricides efficiency to Boophilus microplus (Canestrini, 1887 (Acari: Ixodidae from bovines at the region of Ilhéus, Bahia, Brazil

    Dunezeu Alves Campos Júnior

    2005-12-01

    Full Text Available O carrapato Boophilus microplus é a espécie de maior distribuição geográfica e importância econômica para os países produtores de bovinos em áreas tropicais e sub-tropicais do planeta. No Brasil, a Região Nordeste apresenta algumas áreas mais favoráveis para as infestações do gado. O controle químico ainda é a forma mais eficaz de combate deste ectoparasita, mas o manejo inadequado dos acaricidas tem contribuído com o aparecimento de resistência de populações aos produtos disponíveis no mercado. O município de Ilhéus, na Região Cacaueira da Bahia, vem incrementando sua atividade pecuária em substituição à lavoura cacaueira devastada. Foram realizados 30 testes de imersão in vitro (biocarrapaticidogramas com fêmeas ingurgitadas de B. microplus colhidas em propriedades rurais aleatoriamente selecionadas num grupo de 96 entrevistadas na região. O estudo revelou a existência de resistência ou sensibilidade de populações de B. microplus frente aos carrapaticidas de contato mais utilizados nas propriedades de exploração pecuária da região de Ilhéus. Os quatro carrapaticidas testados apresentaram as seguintes eficiências médias: Amitraz - 30,95%; Deltametrina - 65,04%; Cipermetrina / diclorvos - 75,73%; e Triclorfon / coumaphos / cyfluthrin - 75,13%.The tick Boophilus microplus is the species with the greatest geographical distribution and economic importance for the countries situated at tropical and sub-tropical zones of the planet. In Brazil, the Northwest Region is showed as the most favorable to the cattle infestation. Chemical control is an efficient control method employed, but the inadequate handling of acaricides contributed for to the onset of resistant ticks to the available acaricides in the market. The county of Ilhéus, at the Cocoa's Region from Bahia, has been increasing the cattle activity instead of the devastated cocoa's plantations. Between April and September 2000, in vitro imersion tests were performed with engorged females of B. microplus collected from 30 farms randomly chosen in a group of 96 interviewed at the region. The current study showed the existence of resistance or sensibility of the populations of B. microplus to the contact acaricides commonly used at cattle properties of the region of Ilhéus. The four acaricides tested showed the following levels of efficiency: Amidin - 30.95%; Deltamethrin - 65.04%; Cipermethrin / diclorvos - 75.73%; and Triclorfon / coumaphos / cyfluthrin - 75.13%.

  14. Umbrales económicos para la araña roja Tetranychus urticae (acari: Tetranychidae) en mandarino

    Aguilar Fenollosa, Ernestina; Pascual Ruiz, Sara; Ibáñez Gual, María Victoria; Hurtado Ruiz, Mónica; Martínez Ferrer, M. T.

    2014-01-01

    Tetranychus urticae es una plaga clave en cítricos, especialmente en mandarina clementina. Se evaluó el daño de este ácaro sobre la producción de 24 árboles de clementino durante tres años consecutivos. Los árboles fueron visitados semanalmente, y se estimó tanto la población de araña roja como la de ácaros fitoseidos, así como la brotación. Al final de cada temporada, se recolectaron las clementinas, se pesaron, y se evaluó el daño ocasionado por T. urticae en fruto. Se encontró una relación...

  15. Canis familiaris, UN NUEVO HOSPEDERO DE Ornithodoros (A. puertoricensis FOX, 1947 (ACARI: IXODIDA EN COLOMBIA Canis familiaris, a New Host of Ornithodoros (A. puertoricensis Fox, 1947 (Acari: Ixodida in Colombia

    LUIS E PATERNINA

    Full Text Available Las garrapatas revisten gran importancia en el campo biomédico por sus hábitos hematófagos y asociación con la transmisión de agentes patógenos a humanos y animales. El objetivo de esta investigación fue establecer las especies de garrapatas que parasitan perros en tres poblaciones del área rural del Caribe colombiano. Durante los meses de agosto y diciembre del año 2006 se realizó búsqueda activa de garrapatas sobre caninos domésticos de las localidades de El Campín, Sabanas del Potrero y Escobar Arriba, departamento de Sucre. Las garrapatas recolectadas fueron almacenadas en viales con etanol al 70% e identificadas empleando claves morfológicas de referencia para cada familia. Para la determinación de especie en la familia Argasidae se realizaron estimaciones morfométricas de estructuras externas. Se recolectaron 420 garrapatas a partir de 50 caninos infestados, de un total de 134 perros examinados, que corresponde a una tasa de infestación del 37,3%. Las garrapatas fueron identificadas como Rhipicephalus sanguineus, Rhipicephalus (Boophilus microplus y Amblyomma ovale pertenecientes a la familia Ixodidae, y Ornithodoros (Alectorobius puertoricensis de la familia Argasidae. La especie predominante fue R. sanguineus (92,1% en los estados de larva, ninfa y adulto, seguida por larvas de O. puertoricensis, que fueron halladas en menor número sobre caninos de las tres localidades. Se registra, por primera vez en América, el parasitismo de O. puertoricensis sobre caninos domésticos y se confirma su presencia en Colombia.Ticks are very important from the biomedical point of view, by their hematophagic activity and their role in the transmission of pathogenic microorganisms to man and animals. The main goal of this work was to establish the tick species parasiting dogs in three rural localities of the Colombian Caribbean. From August to December 2006, an active search of ticks on dogs was carried out in the localities of El Camp

  16. Hábitos de consumo sobre la cerveza

    Velasco Matilla, Débora

    2015-01-01

    Estudio de los hábitos de consumo de cerveza en un pueblo determinado situado en la provincia de Segovia, Cantalejo. Contiene un resumen sobre la historia de la cerveza y su tipología y un estudio de mercado sobre la cerveza partiendo de una encuesta.

  17. Violência sobre Crianças

    Sacadura, Catarina Brito; Aragão, Maria José

    2014-01-01

    Trata-se de um estudo de revisão sobre a violência exercida sobre crianças, os agentes da violência, os sujeitos da violência, os factores de risco, as consequências na idade adulta e a recidividade de violência sexual.

  18. Argentina neodesarrollista : Debates sobre el modelo

    Féliz, Mariano

    2015-01-01

    En este libro desarrollamos estudios diversos sobre la economía argentina; las políticas públicas y la estructura social; el proyecto de desarrollo en el país y la región; y la dinámica del capitalismo a escala global. En todos los casos, el objetivo de los textos es analítico y pedagógico a la vez. Pretenden aportar a la comprensión de los diversos problemas, presentando elementos de una propuesta superadora partiendo de la crítica de la economía dominante y desde una lectura que se nutra de...

  19. Algunas observaciones sobre el mundo actual

    Tello, Ángel Pablo

    1993-01-01

    El artículo expone las nuevas condiciones políticas creadas en el mundo a partir de la caída del Muro de Brelín y la disolución de la Unión Soviética. Desde allí, el autor intenta reflexionar sobre las líneas de acción que emergen en el planeta como consecuencia de ello y de la ausencia de referencias globales que se observaron durante décadas. En particular, el ascenso de los nacionalismos que no sólo es un fenómeno que afecta a los países en desarrollo, sino también a las potencias industri...

  20. Sobre a moralidade do direito em Kant

    Joãosinho Beckenkamp

    2009-07-01

    Full Text Available http://dx.doi.org/10.5007/1677-2954.2009v8n1p63Na atual literatura sobre a fi losofi a prática de Kant há uma tendência a negligenciar a distinção feita na Metaphysik der Sitten entre direito (Jus e ética (Ethica, a ponto de ser a doutrina do direito de Kant vista como uma mera aplicação do imperativo categórico. Este artigo procura mostrar que Kant apresenta em sua doutrina do direito uma série de argumentos que logram estabelecer o direito de modo inteiramente independente da ética.

  1. NOTAS SOBRE A LÓGICA ESTOICA

    Valter Duarte Moreira Júnior

    2014-02-01

    Full Text Available Diante do grande desenvolvimento da Lógica e do cálculo proposicional no século XX, estudiosos do assunto em todo o mundo se concentraram em um rigoroso estudo dessa disciplina e sua história. Nesse processo, o eminente lógico polonês Jan Lukaziewicz descobriu em sua pesquisa sobre história da lógica a Lógica Estoica, que, já em III a. C., havia antecipado diversos métodos e conceitos da Lógica Moderna. Nossa intenção neste artigo é fazer um breve esboço da lógica desenvolvida pelos Estoicos.

  2. Apuntes sobre el Cultivo del Cacao

    Ochoa Horacio

    1940-03-01

    Full Text Available Por muchos años permaneció el cultivo del cacao en nuestro país, en un deplorable atraso técnico; el agricultor a duras penas si tenía conocimientos generales de su explotación y, de una industria que tuvo su auge debido a la extensividad de las plantaciones, hoy sólo resta una reducida porción de ella. ¿Qué factores operaron esa tan notoria reducción hasta el punto de que exportadores en otros tiempos nos convertimos en importadores obligados de ese producto? Hay muchas razones de orden técnico y de orden económico. Los cacaotaleros obtenían halagadoras retribuciones cuando el jornal consistía en la alimentación que se le daba a la peonada y cuando, generoso, añadía una sobretasa en dinero. Bajo ese sistema de explotación, el descuadre que pudiera ocasionar tanto las enfermedades criptogámicas como los plagas, no era suficiente como para provocar el pesimismo en el hacendado y por tanto inducirlo al abandono de la plantación. A medida que las condiciones sociales del campesino se fueron modificando y su standard de vida aumentaba, cambió fundamentalmente el mecanismo de la industria Se observó entonces que los árboles morían y que era pobre la producción; que lo que en tiempos pasados fuera un negocio lucrativo, se les había convertido en una actividad improductiva y, para controlar estos fenómenos que se generalizaban en todas las zonas cacaotaleras, opusieron la ignorancia, el rutinarismo y la desidia. Lentamente se han ido modificando los conceptos antiguos sobre el trabajo cultural y los cuidados que con relación a las enfermedades y plagas requiere este delicado cultivo; la rutina está echando paso atrás y las experiencias científicas que procuran la prosperidad del plantío, se ponen en práctica en algunas zonas . Esto da esperanza para la reconstitución de la industria cacaotalera en nuestro país, que cuenta con inmensas regiones de óptima calidad para hacerla florecer sobre bases nuevas, con

  3. NOTAS SOBRE A LÓGICA ESTOICA

    Valter Duarte Moreira Júnior

    2014-01-01

    Diante do grande desenvolvimento da Lógica e do cálculo proposicional no século XX, estudiosos do assunto em todo o mundo se concentraram em um rigoroso estudo dessa disciplina e sua história. Nesse processo, o eminente lógico polonês Jan Lukaziewicz descobriu em sua pesquisa sobre história da lógica a Lógica Estoica, que, já em III a. C., havia antecipado diversos métodos e conceitos da Lógica Moderna. Nossa intenção neste artigo é fazer um breve esboço da lógica desenvolvida pelos Estoicos....

  4. Sobre el Boletín

    Andrés Arias

    2014-03-01

    Full Text Available En la página de Internet de la Biblioteca Luis Ángel Arango se indica que una de la funciones principales del Boletín es la de reseñar la novedades bibliográfica que van apareciendo en el país. "Novedades": de lo nuevo, tanto en las publicaciones como en las reseñas. Es decir, si lo que asegura la página de la Biblioteca es cierto, quien se acerca al Boletín debe encontrarse con comentarios recientes sobre libros recientes. Con guía que le ayuden a elegir entre las mil ofertas que hay en el mercado bibliográfico. Pero bien sabemos que este objetivo no se cumple.

  5. Potential of two populations of Amblyseius swirskii (Acari: Phytoseiidae) for the control of Bemisia tabaci biotype B (Hemiptera: Aleyrodidae) in Brazil.

    Cavalcante, Ana Cristina Cerqueira; Borges, Lucas Rosa; Lourenção, André Luiz; de Moraes, Gilberto José

    2015-12-01

    Predatory mites of the family Phytoseiidae are commercialized in European and North American countries for the control of whiteflies (Insecta: Aleyrodidae). Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) is one of the predators used for that purpose. This predator is not found in Brazil and in many other countries, but its introduction could promote biological control of Bemisia tabaci (Gennadius) biotype B (silverleaf whitefly) in those countries. The aim of this study was to compare two populations of A. swirskii as predators of eggs of B. tabaci of two different ages, as well as the acceptance of those populations for other food types [eggs of Tetranychus urticae Koch; larvae and protonymphs of Aleuroglyphus ovatus (Troupeau) (Astigmatina: Acaridae) and cattail pollen (Typha domingensis Persoon)]. One of the populations of A. swirskii was collected in the Republic of Benin, in tropical Africa, and the other was commercially available in The Netherlands. The comparison was done to evaluate the population with better potential for practical use, and to determine food types that could be used for mass rearing the predator. Experiments were conducted at 28 ± 1 °C, 80 ± 10 % relative humidity and 12 h photophase. Both populations were able to oviposit when fed eggs of B. tabaci, but the Netherlands population showed higher oviposition rate (2.3 and 1.6 times higher on young and older eggs, respectively). Higher predation rates were observed for eggs up to 24 h of age in comparison with older eggs. Aleuroglyphus ovatus proved to be a promising prey for possible mass rearing of this predator in Brazil, where that astigmatic mite is found naturally when pollen was used as food, no significant difference was observed for oviposition rate between populations. The results suggested a higher potential of the Netherlands population of A. swirskii for the control of B. tabaci biotype B in this country for augmentative biological control, with the possible use of

  6. Biology of three species of Agistemus (Acari: Stigmaeidae): life table parameters using eggs of Panonychus citri or pollen of Malephora crocea as food.

    Goldarazena, Arturo; Aguilar, Hugo; Kutuk, Halil; Childers, Carl C

    2004-01-01

    The biology and life table parameters of Agistemus industani Gonzalez, A. cyprius Gonzalez, and A. floridanus Gonzalez (Acari: Stigmaeidae) were studied under laboratory conditions using two food sources: Panonychus citri (McGregor) eggs or ice plant, Malephora crocea (Jacquin) Schwantes pollen at 25 degrees C. The larval, protonymph, deutonymph, and adult stages of A. industani fed on citrus red mite eggs. All active stages of A. industani, except the larva, fed on all P. citri stages and the larval stage could not feed on P. citri adults. All immature stages of A. industani fed on M. crocea pollen. Agistemus cyprius larvae fed on P. citri eggs and larvae or ice plant pollen. The nymphal stages fed on P. citri eggs, larvae, and protonymphs but not deutonymphs or adults while A. cyprius deutonymphs and adults fed on all P. citri stages. Adult and nymphal stages of A. cyprius fed on ice plant pollen and successfully completed their development while A. floridanus did not. Agistemus floridanus larvae fed only on P. citri eggs, while the other stages fed on P. citri eggs, larvae, and protonymphs. The developmental times from egg to adult for A. industani and A. cyprius when fed M. crocea pollen were 11.3 and 13.4 days, respectively. Agistemus floridanus was unable to complete its life cycle on a diet of only M. crocea pollen. Agistemus industani, A. cyprius, and A. floridanus completed development from egg to adult in 11.7, 13.8, and 10.8 days, respectively, when fed P. citri eggs. The intrinsic rate of increase (r(m)) values for A. cyprius and A. industani were 0.0311 and 0.1201 per day on the pollen diet. The net reproductive rate (Ro) was 3.58 for A. cyprius and 10.07 for A. industani with generation times (T) of 45.2 and 35.1 days, respectively, on the ice plant pollen diet. The r(m) values for A. cyprius, A. floridanus, and A. industani on the P. citri egg only diet were: 0.0562, 0.1001, and 0.1031 per day, respectively. The Ro values for each species fed P

  7. Phytoseiidae (Acari: Mesostigmata) within citrus orchards in Florida: species distribution, relative and seasonal abundance within trees, associated vines and ground cover plants.

    Childers, Carl C; Denmark, Harold A

    2011-08-01

    Seven citrus orchards on reduced- to no-pesticide spray programs were sampled for predacious mites in the family Phytoseiidae (Acari: Mesostigmata) in central and south central Florida. Inner and outer canopy leaves, open flowers, fruit, twigs, and trunk scrapings were sampled monthly between September 1994 and January 1996. Vines and ground cover plants were sampled monthly between September 1994 and January 1996 in five of these orchards. The two remaining orchards were on full herbicide programs and ground cover plants were absent. Thirty-three species of phytoseiid mites were identified from 35,405 specimens collected within citrus tree canopies within the seven citrus orchards, and 8,779 specimens from vines and ground cover plants within five of the seven orchards. The six most abundant phytoseiid species found within citrus tree canopies were: Euseius mesembrinus (Dean) (20,948), Typhlodromalus peregrinus (Muma) (8,628), Iphiseiodes quadripilis (Banks) (2,632), Typhlodromips dentilis (De Leon) (592), Typhlodromina subtropica Muma and Denmark (519), and Galendromus helveolus (Chant) (315). The six most abundant species found on vines or ground cover plants were: T. peregrinus (6,608), E. mesembrinus (788), T. dentilis (451), I. quadripilis (203), T. subtropica (90), and Proprioseiopsis asetus (Chant) (48). The remaining phytoseiids included: Amblyseius aerialis (Muma), A. herbicolus (Chant), A. largoensis (Chant), A. multidentatus (Chant), A. sp. near multidentatus, A. obtusus (Koch), Chelaseius vicinus (Muma), Euseius hibisci Chant, Galendromus gratus (Chant), Metaseiulus mcgregori (Chant), Neoseiulus mumai (Denmark), N. vagus (Denmark), Phytoscutus sexpilis (Muma), Phytoseiulus macropilis (Banks), Proprioseiopsis detritus (Muma), P. dorsatus (Muma), P. macrosetae (Banks), P. rotundus (Muma), P. solens (De Leon), Typhlodromips deleoni (Muma), T. dillus (De Leon), T. dimidiatus (De Leon), T. mastus Denmark and Muma, T. simplicissimus (De Leon), and T. sp

  8. Eupalopsellidae and Stigmaeidae (Acari: Prostigmata) within citrus orchards in Florida: species distribution, relative and seasonal abundance within trees, associated vines, and ground cover plants.

    Childers, Carl C; Ueckermann, Eduard A

    2014-10-01

    Seven citrus orchards on reduced- to no-pesticide spray programs were sampled for predacious mites in the families Eupalopsellidae and Stigmaeidae (Acari: Prostigmata) in central and south central Florida. Inner and outer canopy leaves, fruit, twigs, and trunk scrapings were sampled monthly between August 1994 and January 1996. Open flowers were sampled in March from five of the sites. Two species of eupalopsellid mites (Exothorhis caudata Summers and Saniosulus harteni (van-Dis and Ueckermann)) were identified from 252 specimens collected within citrus tree canopies within the seven citrus orchards of which 249 were E. caudata. Only two E. caudata were collected from ground cover plants within five of the seven orchards. Eight species of Stigmaeidae were identified from 5,637 specimens: Agistemus floridanus Gonzalez, A. terminalis Gonzalez, Eustigmaeus arcuata (Chandhri), E. sp. near arcuata, E. segnis (Koch), Mediostigmaeus citri (Rakha and McCoy), Stigmaeus seminudus Wood, and Zetzellia languida Gonzalez were collected from within citrus tree canopies from seven orchard sites. Agistemus floridanus was the only species in either family that was abundant with 5,483 collected from within citrus tree canopies compared with only 39 from vine or ground cover plants. A total of 431 samples from one or more of 82 vines and ground cover plants were sampled monthly between September 1994 and January 1996 in five of these orchards and one or more eupalopsellids or stigmaeids were collected from 19 of these plants. Richardia brasiliensis (Meg.) Gomez had nine A. floridanus from 5 of 25 samples collected from this plant. Solanum sp. had five A. floridanus from three samples taken. Both eupalopsellid and stigmaeid species numbers represented orchards were on full herbicide programs and ground cover plants were absent. Agistemus floridanus was more abundant in the citrus orchards with on-going or recent herbicide programs compared with orchards having well-developed ground

  9. Fatores que afetam artrópodes associados a cinco acessos de ginseng-brasileiro (Pfaffia glomerata em Montes Claros, Estado de Minas Gerais = Factors affecting arthropods associated with five accessions of Brazilian ginseng (Pfaffia glomerata in Montes Claros, Brazil

    Germano Leão Demolin Leite

    2008-01-01

    Full Text Available O objetivo deste trabalho foi identificar artrópodes associados a cinco acessos ('NDS', 'COVB', 'NAT', 'ROST' e 'GSD1' de Pfaffia glomerata, bem como o efeito de clima, dossel, face foliar, tricomas e inimigos naturais sobre a entomofauna. Dos artrópodes observados, Aphis gossypii (Hemiptera: Aphididae, Diabrotica speciosa (Coleoptera: Chrysomelidae e Tetranychus ludeni (Acari: Tetranychidae apresentaram maior densidade populacional. Dos inimigos naturais observados, ácaros predadores estiveram associados ao ácaro branco Polyphagotarsonemus latus (Acari: Tarsonemidae, e um complexo de aranhas a besouros desfolhadores, pulgões e cicadelídeos. Observaram-se correlações significativas diretas múltiplas e lineares da população de A. gossypii com maior densidade de Crematogaster sp.(Hymenotera: Formicidae (protocooperação e correlação negativa com densidade de Cycloneda sanguinea (Coleoptera: Coccinelidae e a temperatura do ar. Foi observado maior ataque de ácaros T. ludeni, T. urticae (Tetranychidae e P. latus, em períodos de menor umidaderelativa. Observou-se maior densidade populacional de A. gossypii, nos acessos 'ROST' e 'NAT' e de T. ludeni ao acesso 'ROST'. O acesso 'GSD1' foi o mais danificado por besouros desfolhadores. Pulgões e ácaros preferiram alimentar-se na face abaxial das folhas apicais,enquanto D. speciosa apresentou preferência pela face adaxial do terço mediano do dossel. Tricomas (100% tectores não afetaram os artrópodes.The objective of this study was to identify arthropods associated with five accessions ('NDS', 'COVB', 'NAT', 'ROST' and 'GSD1' of Pfaffia glomerata and the effect of weather, canopy height, foliar face, trichomes, and naturals enemies over the entomofauna. The arthropods Aphis gossypii, Diabrotica speciosa, and Tetranychus ludeni had the highest population densities. Among naturals enemies, there were predator mites associated with the broad mitePolyphagotarsonemus latus, and the spiders

  10. Pilas de arena sobre grafos dirigidos y algo de complejidad

    Carolina Mejía Moreno

    2006-01-01

    Full Text Available En este artículo estudiamos el Modelo de Pilas de Arena sobre grafos dirigidos. El comportamiento del modelo sobre grafos dirigidos es más complejo (en término estrictos que sobre grafos no dirigidos; es por ello que, para muchas de las preguntas centrales de la teoría, no se conoce la respuesta en el caso dirigido. En este artículo se ha sintetizado la teoría para digrafos, se han simplificado algunas pruebas y se concretan algunos resultados relacionados con la complejidad de predicción del autómata.