Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana
Autor(a) principal: | |
---|---|
Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | https://www.revistas.usp.br/sa/article/view/21711 |
Resumo: | The Paraguay tea (Ilex paraguariensis) crop is an important economical activity in Southern Brazil. With the increase of tea consumption in the 80s, the number of monoculture crops also increased, creating favorable conditions for the development of phytophagous insect and mite populations, such as the red mite Oligonychus yothersi. The objective of this study was to evaluate the susceptibility of the red mite O. yothersi to the several strains of the Beauveria bassiana fungus. The experiments were carried out in Cascavel, PR, Brazil. Leaf disks of Paraguay tea (2.2 cm²) were previously infested with 20 adult females. Five disks were inoculated with 1 mL of each conidial suspension of B. bassiana strains (1x10(8) conidia per mL). Disks were kept afloat on distilled water in plastic boxes (3 cm diameter), under controlled conditions. Dead mites were transferred to a humid chamber on a daily basis to confirm the mortalities rate by the fungus. All the strains were pathogenic, with total mortality varying from 77 to 98%, 6 days after application. It was not possible to differentiate virulence levels between strains (P |
id |
USP-18_d76718450576d447141bd5a98abe0b5d |
---|---|
oai_identifier_str |
oai:revistas.usp.br:article/21711 |
network_acronym_str |
USP-18 |
network_name_str |
Scientia Agrícola (Online) |
repository_id_str |
|
spelling |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana Suscetibilidade de Oligonychus yothersi (Acari: Tetranychidae) ao fungo Beauveria bassiana ácaro vermelhoerva-matefungo entomopatogênicored miteParaguay teaentomopathogenic fungi The Paraguay tea (Ilex paraguariensis) crop is an important economical activity in Southern Brazil. With the increase of tea consumption in the 80s, the number of monoculture crops also increased, creating favorable conditions for the development of phytophagous insect and mite populations, such as the red mite Oligonychus yothersi. The objective of this study was to evaluate the susceptibility of the red mite O. yothersi to the several strains of the Beauveria bassiana fungus. The experiments were carried out in Cascavel, PR, Brazil. Leaf disks of Paraguay tea (2.2 cm²) were previously infested with 20 adult females. Five disks were inoculated with 1 mL of each conidial suspension of B. bassiana strains (1x10(8) conidia per mL). Disks were kept afloat on distilled water in plastic boxes (3 cm diameter), under controlled conditions. Dead mites were transferred to a humid chamber on a daily basis to confirm the mortalities rate by the fungus. All the strains were pathogenic, with total mortality varying from 77 to 98%, 6 days after application. It was not possible to differentiate virulence levels between strains (P A cultura da erva-mate (Ilex paraguariensis) é uma importante atividade econômica no Sul do Brasil. Com o aumento de consumo nos anos oitenta, cresceram também as áreas de monocultura, gerando condições favoráveis para o aumento populacional de insetos e ácaros fitófagos, entre eles o ácaro vermelho Oligonychus yothersi. Este estudo avaliou a suscetibilidade do ácaro vermelho O. yothersi a vários isolados do fungo Beauveria bassiana. O experimento foi conduzido em Cascavel, PR. Discos foliares de erva-mate (2,2 cm²) foram previamente infestados com 20 fêmeas adultas. Alíquotas de 1 mL de cada suspensão de conídios dos diferentes isolados de B. bassiana, ajustadas na concentração de 1,0x10(8) conídios mL-1 foram pulverizadas, separadamente, sobre um conjunto de 5 discos. Os discos foliares foram mantidos flutuando em água destilada, em caixas plásticas (3 cm de diâmetro), sob condições controladas. Diariamente, os ácaros mortos foram transferidos para câmara úmida, para confirmação de mortalidade causada pelo fungo. A mortalidade total variou entre 77 e 98% (6 dias após a aplicação), não permitindo diferenciar os isolados quanto à virulência (P>;0,05). Já a mortalidade confirmada variou entre 19 e 75%, permitindo diferenciá-los (PUniversidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz2002-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/sa/article/view/2171110.1590/S0103-90162002000100027Scientia Agricola; v. 59 n. 1 (2002); 187-189Scientia Agricola; Vol. 59 No. 1 (2002); 187-189Scientia Agricola; Vol. 59 Núm. 1 (2002); 187-1891678-992X0103-9016reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USPporhttps://www.revistas.usp.br/sa/article/view/21711/23735Copyright (c) 2015 Scientia Agricolainfo:eu-repo/semantics/openAccessOliveira, Renato Cassol deAlves, Luis Francisco AngeliNeves, Pedro Manuel Oliveira Janeiro2015-07-07T11:38:54Zoai:revistas.usp.br:article/21711Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2015-07-07T11:38:54Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana Suscetibilidade de Oligonychus yothersi (Acari: Tetranychidae) ao fungo Beauveria bassiana |
title |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
spellingShingle |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana Oliveira, Renato Cassol de ácaro vermelho erva-mate fungo entomopatogênico red mite Paraguay tea entomopathogenic fungi |
title_short |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
title_full |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
title_fullStr |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
title_full_unstemmed |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
title_sort |
Susceptibility of Oligonychus yothersi (Acari: Tetranychidae) to the fungus Beauveria bassiana |
author |
Oliveira, Renato Cassol de |
author_facet |
Oliveira, Renato Cassol de Alves, Luis Francisco Angeli Neves, Pedro Manuel Oliveira Janeiro |
author_role |
author |
author2 |
Alves, Luis Francisco Angeli Neves, Pedro Manuel Oliveira Janeiro |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Oliveira, Renato Cassol de Alves, Luis Francisco Angeli Neves, Pedro Manuel Oliveira Janeiro |
dc.subject.por.fl_str_mv |
ácaro vermelho erva-mate fungo entomopatogênico red mite Paraguay tea entomopathogenic fungi |
topic |
ácaro vermelho erva-mate fungo entomopatogênico red mite Paraguay tea entomopathogenic fungi |
description |
The Paraguay tea (Ilex paraguariensis) crop is an important economical activity in Southern Brazil. With the increase of tea consumption in the 80s, the number of monoculture crops also increased, creating favorable conditions for the development of phytophagous insect and mite populations, such as the red mite Oligonychus yothersi. The objective of this study was to evaluate the susceptibility of the red mite O. yothersi to the several strains of the Beauveria bassiana fungus. The experiments were carried out in Cascavel, PR, Brazil. Leaf disks of Paraguay tea (2.2 cm²) were previously infested with 20 adult females. Five disks were inoculated with 1 mL of each conidial suspension of B. bassiana strains (1x10(8) conidia per mL). Disks were kept afloat on distilled water in plastic boxes (3 cm diameter), under controlled conditions. Dead mites were transferred to a humid chamber on a daily basis to confirm the mortalities rate by the fungus. All the strains were pathogenic, with total mortality varying from 77 to 98%, 6 days after application. It was not possible to differentiate virulence levels between strains (P |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-03-01 |
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://www.revistas.usp.br/sa/article/view/21711 10.1590/S0103-90162002000100027 |
url |
https://www.revistas.usp.br/sa/article/view/21711 |
identifier_str_mv |
10.1590/S0103-90162002000100027 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://www.revistas.usp.br/sa/article/view/21711/23735 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2015 Scientia Agricola info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2015 Scientia Agricola |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
publisher.none.fl_str_mv |
Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz |
dc.source.none.fl_str_mv |
Scientia Agricola; v. 59 n. 1 (2002); 187-189 Scientia Agricola; Vol. 59 No. 1 (2002); 187-189 Scientia Agricola; Vol. 59 Núm. 1 (2002); 187-189 1678-992X 0103-9016 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1787713253082660864 |