In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides

Detalhes bibliográficos
Autor(a) principal: Reis,Erlei Melo
Data de Publicação: 2015
Outros Autores: Deuner,Elaine, Zanatta,Mateus
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Summa phytopathologica (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100021
Resumo: In in vivoexperiments the sensitivity of 18 isolates of Phakopsora pachyrhizifrom several regions of Brazil to IDM fungicides (cyproconazole, epoxiconazole and tebuconazole and an IQE (pyraclostrobin) were evaluated. The assessments were based on leaflet uredia density. Inhibitory concentration (IC50) and sensitivity reduction factor were determined for all fungicide x strain interactions. Tebuconazole sensitivity reduction was detected for most fungus isolates. In contrast, there was no fungicide shift in sensitivity of the fungus to pyraclostrobin. We conclude that the control failure of soybean rust found in some farms is due to the reduced sensitivity of the fungus to the IDM fungicide and that it remains sensitive to pyraclostrobin.
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spelling In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicidesSoybean rustfungitoxicityresistancetriazol and strobilurin fungicidesIn in vivoexperiments the sensitivity of 18 isolates of Phakopsora pachyrhizifrom several regions of Brazil to IDM fungicides (cyproconazole, epoxiconazole and tebuconazole and an IQE (pyraclostrobin) were evaluated. The assessments were based on leaflet uredia density. Inhibitory concentration (IC50) and sensitivity reduction factor were determined for all fungicide x strain interactions. Tebuconazole sensitivity reduction was detected for most fungus isolates. In contrast, there was no fungicide shift in sensitivity of the fungus to pyraclostrobin. We conclude that the control failure of soybean rust found in some farms is due to the reduced sensitivity of the fungus to the IDM fungicide and that it remains sensitive to pyraclostrobin.Grupo Paulista de Fitopatologia2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100021Summa Phytopathologica v.41 n.1 2015reponame:Summa phytopathologica (Online)instname:Grupo Paulista de Fitopatologiainstacron:GPF10.1590/0100-5405/1975info:eu-repo/semantics/openAccessReis,Erlei MeloDeuner,ElaineZanatta,Mateuseng2015-10-07T00:00:00Zoai:scielo:S0100-54052015000100021Revistahttp://www.scielo.br/sphttps://old.scielo.br/oai/scielo-oai.phpsumma@fca.unesp.br1980-54540100-5405opendoar:2015-10-07T00:00Summa phytopathologica (Online) - Grupo Paulista de Fitopatologiafalse
dc.title.none.fl_str_mv In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
title In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
spellingShingle In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
Reis,Erlei Melo
Soybean rust
fungitoxicity
resistance
triazol and strobilurin fungicides
title_short In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
title_full In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
title_fullStr In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
title_full_unstemmed In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
title_sort In vivo sensitivity of Phakopsora pachyrhizi to DMI and QoI fungicides
author Reis,Erlei Melo
author_facet Reis,Erlei Melo
Deuner,Elaine
Zanatta,Mateus
author_role author
author2 Deuner,Elaine
Zanatta,Mateus
author2_role author
author
dc.contributor.author.fl_str_mv Reis,Erlei Melo
Deuner,Elaine
Zanatta,Mateus
dc.subject.por.fl_str_mv Soybean rust
fungitoxicity
resistance
triazol and strobilurin fungicides
topic Soybean rust
fungitoxicity
resistance
triazol and strobilurin fungicides
description In in vivoexperiments the sensitivity of 18 isolates of Phakopsora pachyrhizifrom several regions of Brazil to IDM fungicides (cyproconazole, epoxiconazole and tebuconazole and an IQE (pyraclostrobin) were evaluated. The assessments were based on leaflet uredia density. Inhibitory concentration (IC50) and sensitivity reduction factor were determined for all fungicide x strain interactions. Tebuconazole sensitivity reduction was detected for most fungus isolates. In contrast, there was no fungicide shift in sensitivity of the fungus to pyraclostrobin. We conclude that the control failure of soybean rust found in some farms is due to the reduced sensitivity of the fungus to the IDM fungicide and that it remains sensitive to pyraclostrobin.
publishDate 2015
dc.date.none.fl_str_mv 2015-03-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100021
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100021
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0100-5405/1975
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Grupo Paulista de Fitopatologia
publisher.none.fl_str_mv Grupo Paulista de Fitopatologia
dc.source.none.fl_str_mv Summa Phytopathologica v.41 n.1 2015
reponame:Summa phytopathologica (Online)
instname:Grupo Paulista de Fitopatologia
instacron:GPF
instname_str Grupo Paulista de Fitopatologia
instacron_str GPF
institution GPF
reponame_str Summa phytopathologica (Online)
collection Summa phytopathologica (Online)
repository.name.fl_str_mv Summa phytopathologica (Online) - Grupo Paulista de Fitopatologia
repository.mail.fl_str_mv summa@fca.unesp.br
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