Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures

Detalhes bibliográficos
Autor(a) principal: Basso, Lúcia Mara de Souza
Data de Publicação: 2005
Outros Autores: Monteiro, Antonio Carlos, Belo, Marco Antonio de Andrade, Soares, Vando Edesio, Garcia, Marcos Valério, Mochi, Dinalva Alves
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6998
Resumo: The objective of this work was to evaluate the efficiency of Metarhizium anisopliae fungus against Boophilus microplus population in Brachiaria brizantha and Tifton 85 (Cynodon) pastures, artificially infested with tick engorged females. Thirty plots of 1 m2 each were randomly distributed in fifteen treated and fifteen control groups per type of grass, establishing five repetitions for each treatment. Pastures were infested with engorged tick females standardized by number and weight. Metarhizium anisopliae suspension with 1.8x108 conidia mL-1 concentration was sprayed on the plot in three different assays, prior infested with tick females, immediately after tick inoculation and at first larvae emergency. The fungus action was evaluated at 35th, 38th, 41st, 48th, 55th and 61st day post infestation by counting recovered larvae. A significative reduction of larvae counts occurred in fungus treated groups during 35th to 48th day post infestation, ranging between 87% and 94% of efficacy on tick larvae control. The mean values for larvae counting in Tifton 85 pasture were lower than in B. brizantha plot in all analysis, suggesting the pasture effect on fungus action. Treatment strategy influenced on M. anisopliae activity, which demonstrated better results at 41st and 55th day post infestation in B. brizantha, submitted to conidia challenge after larvae emergency.
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spelling Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pasturesControle de larvas de Boophilus microplus por Metarhizium anisopliae em pastagens infestadas artificialmenteBrachiaria brizantha; Tifton 85; tick; biological control; entomopathogenic fungusBrachiaria brizantha; Tifton 85; carrapato; controle biológico; fungo entomopatogênicoThe objective of this work was to evaluate the efficiency of Metarhizium anisopliae fungus against Boophilus microplus population in Brachiaria brizantha and Tifton 85 (Cynodon) pastures, artificially infested with tick engorged females. Thirty plots of 1 m2 each were randomly distributed in fifteen treated and fifteen control groups per type of grass, establishing five repetitions for each treatment. Pastures were infested with engorged tick females standardized by number and weight. Metarhizium anisopliae suspension with 1.8x108 conidia mL-1 concentration was sprayed on the plot in three different assays, prior infested with tick females, immediately after tick inoculation and at first larvae emergency. The fungus action was evaluated at 35th, 38th, 41st, 48th, 55th and 61st day post infestation by counting recovered larvae. A significative reduction of larvae counts occurred in fungus treated groups during 35th to 48th day post infestation, ranging between 87% and 94% of efficacy on tick larvae control. The mean values for larvae counting in Tifton 85 pasture were lower than in B. brizantha plot in all analysis, suggesting the pasture effect on fungus action. Treatment strategy influenced on M. anisopliae activity, which demonstrated better results at 41st and 55th day post infestation in B. brizantha, submitted to conidia challenge after larvae emergency.O objetivo deste trabalho foi avaliar a eficiência do controle exercido por Metarhizium anisopliae na população de Boophilus microplus, em pastagens de Brachiaria brizantha, e do híbrido Tifton 85 (Cynodon spp.), artificialmente infestadas com fêmeas ingurgitadas do carrapato. Trinta canteiros com 1 m2 de área cada foram distribuídos aleatoriamente. Quinze foram pulverizados com esporos do fungo e quinze controles em cada forrageira, constituindo cinco repetições de cada tratamento, foram infestados com número e peso padronizados de fêmeas ingurgitadas do ácaro. Aplicou-se o fungo, na concentração de 1,8x108 conídios mL-1, em três situações: pulverização antes da infestação com o carrapato, após a infestação e posterioriormente à emergência das primeiras larvas nos capins. A ação do fungo foi avaliada no 35o, 38o, 41o, 48o, 55o e 61o dia pós-infestação, por meio da contagem de larvas recuperadas. Obteve-se controle de larvas do ácaro, que, nas avaliações realizadas entre o 35o e o 48o dia pós-infestação, variou entre 87% e 94%. As médias das contagens de estágios larvares do carrapato foram menores em todas as amostragens realizadas no capim-Tifton 85, indicando que houve efeito da pastagem na ação do fungo. A situação de aplicação influencia a atividade do fungo, com melhor resultado nas coletas realizadas entre o 41o e 55o dia após infestação em B. brizantha, e aplicação dos conídios logo após a emergência das primeiras larvas.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBasso, Lúcia Mara de SouzaMonteiro, Antonio CarlosBelo, Marco Antonio de AndradeSoares, Vando EdesioGarcia, Marcos ValérioMochi, Dinalva Alves2005-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6998Pesquisa Agropecuaria Brasileira; v.40, n.6, jun. 2005; 595-600Pesquisa Agropecuária Brasileira; v.40, n.6, jun. 2005; 595-6001678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6998/4046info:eu-repo/semantics/openAccess2014-09-22T17:36:36Zoai:ojs.seer.sct.embrapa.br:article/6998Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-22T17:36:36Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
Controle de larvas de Boophilus microplus por Metarhizium anisopliae em pastagens infestadas artificialmente
title Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
spellingShingle Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
Basso, Lúcia Mara de Souza
Brachiaria brizantha; Tifton 85; tick; biological control; entomopathogenic fungus
Brachiaria brizantha; Tifton 85; carrapato; controle biológico; fungo entomopatogênico
title_short Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
title_full Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
title_fullStr Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
title_full_unstemmed Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
title_sort Control of Boophilus microplus larvae by Metarhizium anisopliae in artificially infested pastures
author Basso, Lúcia Mara de Souza
author_facet Basso, Lúcia Mara de Souza
Monteiro, Antonio Carlos
Belo, Marco Antonio de Andrade
Soares, Vando Edesio
Garcia, Marcos Valério
Mochi, Dinalva Alves
author_role author
author2 Monteiro, Antonio Carlos
Belo, Marco Antonio de Andrade
Soares, Vando Edesio
Garcia, Marcos Valério
Mochi, Dinalva Alves
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Basso, Lúcia Mara de Souza
Monteiro, Antonio Carlos
Belo, Marco Antonio de Andrade
Soares, Vando Edesio
Garcia, Marcos Valério
Mochi, Dinalva Alves
dc.subject.por.fl_str_mv Brachiaria brizantha; Tifton 85; tick; biological control; entomopathogenic fungus
Brachiaria brizantha; Tifton 85; carrapato; controle biológico; fungo entomopatogênico
topic Brachiaria brizantha; Tifton 85; tick; biological control; entomopathogenic fungus
Brachiaria brizantha; Tifton 85; carrapato; controle biológico; fungo entomopatogênico
description The objective of this work was to evaluate the efficiency of Metarhizium anisopliae fungus against Boophilus microplus population in Brachiaria brizantha and Tifton 85 (Cynodon) pastures, artificially infested with tick engorged females. Thirty plots of 1 m2 each were randomly distributed in fifteen treated and fifteen control groups per type of grass, establishing five repetitions for each treatment. Pastures were infested with engorged tick females standardized by number and weight. Metarhizium anisopliae suspension with 1.8x108 conidia mL-1 concentration was sprayed on the plot in three different assays, prior infested with tick females, immediately after tick inoculation and at first larvae emergency. The fungus action was evaluated at 35th, 38th, 41st, 48th, 55th and 61st day post infestation by counting recovered larvae. A significative reduction of larvae counts occurred in fungus treated groups during 35th to 48th day post infestation, ranging between 87% and 94% of efficacy on tick larvae control. The mean values for larvae counting in Tifton 85 pasture were lower than in B. brizantha plot in all analysis, suggesting the pasture effect on fungus action. Treatment strategy influenced on M. anisopliae activity, which demonstrated better results at 41st and 55th day post infestation in B. brizantha, submitted to conidia challenge after larvae emergency.
publishDate 2005
dc.date.none.fl_str_mv 2005-06-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6998
url https://seer.sct.embrapa.br/index.php/pab/article/view/6998
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6998/4046
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.40, n.6, jun. 2005; 595-600
Pesquisa Agropecuária Brasileira; v.40, n.6, jun. 2005; 595-600
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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