Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Summa phytopathologica (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100025 |
Resumo: | Northern corn leaf blight, caused by Exserohilum turcicum(Et), is one of the major corn diseases which can reduce grain yield and quality. The aim of this study was to determine the mycelial sensitivity of ten Etisolates, five from Argentina and five from Brazil, to six fungicides (carbendazim, captan, fludioxinil, metalaxyl, iprodione and thiram) used in seed treatment. The inhibitory concentration (IC50) was determined by using seven concentrations of the fungicides supplemented to the agar medium. The mycelial colony diameter was measured with a digital caliper. Experimental design was completely randomized with four replicates. Data on the percent mycelial growth inhibition were analyzed by logarithmic regression and the IC50 was calculated. The fungicide iprodione was the most potent, with IC50 < 0.01 mg/L, followed by fludioxonil, IC50 0.31 mg/L, and thiram, 1.37 mg/L. Carbendazim, metalaxyl and captan were classified as non-fungitoxic, showing IC50 > 50 mg/L for all isolates. Although iprodione is the most potent fungicide, it is not used for corn seed treatment. The IC50s obtained in this study can be used as baseline for future monitoring studies of Etsensitivity to fungicides. |
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Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight:baseline inhibitory concentrationfungitoxicityhelmintosporiosisHelminthosporium turcicumZea maysNorthern corn leaf blight, caused by Exserohilum turcicum(Et), is one of the major corn diseases which can reduce grain yield and quality. The aim of this study was to determine the mycelial sensitivity of ten Etisolates, five from Argentina and five from Brazil, to six fungicides (carbendazim, captan, fludioxinil, metalaxyl, iprodione and thiram) used in seed treatment. The inhibitory concentration (IC50) was determined by using seven concentrations of the fungicides supplemented to the agar medium. The mycelial colony diameter was measured with a digital caliper. Experimental design was completely randomized with four replicates. Data on the percent mycelial growth inhibition were analyzed by logarithmic regression and the IC50 was calculated. The fungicide iprodione was the most potent, with IC50 < 0.01 mg/L, followed by fludioxonil, IC50 0.31 mg/L, and thiram, 1.37 mg/L. Carbendazim, metalaxyl and captan were classified as non-fungitoxic, showing IC50 > 50 mg/L for all isolates. Although iprodione is the most potent fungicide, it is not used for corn seed treatment. The IC50s obtained in this study can be used as baseline for future monitoring studies of Etsensitivity to fungicides.Grupo Paulista de Fitopatologia2015-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100025Summa Phytopathologica v.41 n.1 2015reponame:Summa phytopathologica (Online)instname:Grupo Paulista de Fitopatologiainstacron:GPF10.1590/0100-5405/1931info:eu-repo/semantics/openAccessDe Rossi,Roberto LuisReis,Erlei MeloBrustolin,Ricardoeng2015-10-07T00:00:00Zoai:scielo:S0100-54052015000100025Revistahttp://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 |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
title |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
spellingShingle |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight De Rossi,Roberto Luis :baseline inhibitory concentration fungitoxicity helmintosporiosis Helminthosporium turcicum Zea mays |
title_short |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
title_full |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
title_fullStr |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
title_full_unstemmed |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
title_sort |
Fungicide baseline for mycelial sensitivity of Exserohilum turcicum, causal agent of northern corn leaf blight |
author |
De Rossi,Roberto Luis |
author_facet |
De Rossi,Roberto Luis Reis,Erlei Melo Brustolin,Ricardo |
author_role |
author |
author2 |
Reis,Erlei Melo Brustolin,Ricardo |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
De Rossi,Roberto Luis Reis,Erlei Melo Brustolin,Ricardo |
dc.subject.por.fl_str_mv |
:baseline inhibitory concentration fungitoxicity helmintosporiosis Helminthosporium turcicum Zea mays |
topic |
:baseline inhibitory concentration fungitoxicity helmintosporiosis Helminthosporium turcicum Zea mays |
description |
Northern corn leaf blight, caused by Exserohilum turcicum(Et), is one of the major corn diseases which can reduce grain yield and quality. The aim of this study was to determine the mycelial sensitivity of ten Etisolates, five from Argentina and five from Brazil, to six fungicides (carbendazim, captan, fludioxinil, metalaxyl, iprodione and thiram) used in seed treatment. The inhibitory concentration (IC50) was determined by using seven concentrations of the fungicides supplemented to the agar medium. The mycelial colony diameter was measured with a digital caliper. Experimental design was completely randomized with four replicates. Data on the percent mycelial growth inhibition were analyzed by logarithmic regression and the IC50 was calculated. The fungicide iprodione was the most potent, with IC50 < 0.01 mg/L, followed by fludioxonil, IC50 0.31 mg/L, and thiram, 1.37 mg/L. Carbendazim, metalaxyl and captan were classified as non-fungitoxic, showing IC50 > 50 mg/L for all isolates. Although iprodione is the most potent fungicide, it is not used for corn seed treatment. The IC50s obtained in this study can be used as baseline for future monitoring studies of Etsensitivity to fungicides. |
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=S0100-54052015000100025 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052015000100025 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0100-5405/1931 |
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 |
_version_ |
1754193418034085888 |