Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean

Detalhes bibliográficos
Autor(a) principal: Zanatta,Tiago
Data de Publicação: 2012
Outros Autores: Reis,Erlei Melo, 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=S0100-54052012000200007
Resumo: Experiments were carried out in a growth chamber to evaluate the effect of spreader and uredospore concentrations on the efficiency of infection by Phakopsora pachyrhizi, the causal agent of Asian soybean rust. CD 214 RR soybean cultivar was inoculated with the following polyoxyethylene sorbitane monolaurate concentrations: 0, 30, 60, 120, 240, 480 and 960 µL.L-1 water, as well as a fixed uredospore concentration of 2 x 10(4) spores.mL-1. In a second phase, the inoculum concentrations of 0, 5 x 10³, 1 x 10(4), 2 x 10(4), 4 x 10(4), 8 x 10(4) and 16 x 10(4) uredospores.mL-1 were evaluated, and the spreader concentration of 240 µL.L-1, selected in the previous experiment, was fixed. The spreader concentration of 240 µL.L-1 can be used in artificial inoculation studies, as well as up to 4 x 10(4) uredospores.mL-1. In this work, there was a correlation between uredia and lesion density. Thus, the use of lesion density is recommended to assess disease intensity for its accuracy and less time consuming. There was also a positive correlation between uredia and lesion density.
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spelling Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybeanLeaflet incidencelesion densityAsian soybean rustGlycine maxExperiments were carried out in a growth chamber to evaluate the effect of spreader and uredospore concentrations on the efficiency of infection by Phakopsora pachyrhizi, the causal agent of Asian soybean rust. CD 214 RR soybean cultivar was inoculated with the following polyoxyethylene sorbitane monolaurate concentrations: 0, 30, 60, 120, 240, 480 and 960 µL.L-1 water, as well as a fixed uredospore concentration of 2 x 10(4) spores.mL-1. In a second phase, the inoculum concentrations of 0, 5 x 10³, 1 x 10(4), 2 x 10(4), 4 x 10(4), 8 x 10(4) and 16 x 10(4) uredospores.mL-1 were evaluated, and the spreader concentration of 240 µL.L-1, selected in the previous experiment, was fixed. The spreader concentration of 240 µL.L-1 can be used in artificial inoculation studies, as well as up to 4 x 10(4) uredospores.mL-1. In this work, there was a correlation between uredia and lesion density. Thus, the use of lesion density is recommended to assess disease intensity for its accuracy and less time consuming. There was also a positive correlation between uredia and lesion density.Grupo Paulista de Fitopatologia2012-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-54052012000200007Summa Phytopathologica v.38 n.2 2012reponame:Summa phytopathologica (Online)instname:Grupo Paulista de Fitopatologiainstacron:GPF10.1590/S0100-54052012000200007info:eu-repo/semantics/openAccessZanatta,TiagoReis,Erlei MeloZanatta,Mateuseng2012-07-23T00:00:00Zoai:scielo:S0100-54052012000200007Revistahttp://www.scielo.br/sphttps://old.scielo.br/oai/scielo-oai.phpsumma@fca.unesp.br1980-54540100-5405opendoar:2012-07-23T00:00Summa phytopathologica (Online) - Grupo Paulista de Fitopatologiafalse
dc.title.none.fl_str_mv Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
title Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
spellingShingle Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
Zanatta,Tiago
Leaflet incidence
lesion density
Asian soybean rust
Glycine max
title_short Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
title_full Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
title_fullStr Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
title_full_unstemmed Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
title_sort Adjuvant concentrations and uredospore densities on Phakopsora pachyrhizi infection efficiency in soybean
author Zanatta,Tiago
author_facet Zanatta,Tiago
Reis,Erlei Melo
Zanatta,Mateus
author_role author
author2 Reis,Erlei Melo
Zanatta,Mateus
author2_role author
author
dc.contributor.author.fl_str_mv Zanatta,Tiago
Reis,Erlei Melo
Zanatta,Mateus
dc.subject.por.fl_str_mv Leaflet incidence
lesion density
Asian soybean rust
Glycine max
topic Leaflet incidence
lesion density
Asian soybean rust
Glycine max
description Experiments were carried out in a growth chamber to evaluate the effect of spreader and uredospore concentrations on the efficiency of infection by Phakopsora pachyrhizi, the causal agent of Asian soybean rust. CD 214 RR soybean cultivar was inoculated with the following polyoxyethylene sorbitane monolaurate concentrations: 0, 30, 60, 120, 240, 480 and 960 µL.L-1 water, as well as a fixed uredospore concentration of 2 x 10(4) spores.mL-1. In a second phase, the inoculum concentrations of 0, 5 x 10³, 1 x 10(4), 2 x 10(4), 4 x 10(4), 8 x 10(4) and 16 x 10(4) uredospores.mL-1 were evaluated, and the spreader concentration of 240 µL.L-1, selected in the previous experiment, was fixed. The spreader concentration of 240 µL.L-1 can be used in artificial inoculation studies, as well as up to 4 x 10(4) uredospores.mL-1. In this work, there was a correlation between uredia and lesion density. Thus, the use of lesion density is recommended to assess disease intensity for its accuracy and less time consuming. There was also a positive correlation between uredia and lesion density.
publishDate 2012
dc.date.none.fl_str_mv 2012-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.language.iso.fl_str_mv eng
language eng
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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.38 n.2 2012
reponame:Summa phytopathologica (Online)
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