Cultivar mixtures in panicle blast control in upland rice
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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/13606 |
Resumo: | During 1984/85 and 1985/86 crop seasons field trials were conducted on cultivar mixtures as one of the alternative measures to restrict the panicle blast severities in upland rice. Two sets of mixtures, five each of early (Dourado Precoce, Guarani, IAC 25, IAC 165, IRAT 112) and medium duration (Amarelão, Araguaia, CNAx 104-13-34-2, IAC 47, IRAT 13) cultivars/lines exhibiting different degrees of susceptibility were compared with the individual components in relation to panicle blast and grain yield with and whithout chemical control. Three sprays of fungicide triciclazol (262 g/ha) were administered beginning from 5% heading. The average panicle blast severity of the treated and untreated plots of early duration cultivar mixture was signiticantly equal or less than the mean disease severity of its components. The performance of cultivar mixtures, in general, was inferior to the improved upland rice cultivars Guarani and Araguaia among the early and médium duration ones, respectively, in relation to panicle blast and grain yield. |
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Cultivar mixtures in panicle blast control in upland riceMisturas de cultivares no controle de brusone nas panículas em arroz de sequeiroPyricularia oryzae; Oryza sativa; varietal resistance; chemical control; fungicide; epidemiology.Pyricularia oryzae; Oryza sativa; resistência varietal; controle químico,;fungicida; epidemiologia.During 1984/85 and 1985/86 crop seasons field trials were conducted on cultivar mixtures as one of the alternative measures to restrict the panicle blast severities in upland rice. Two sets of mixtures, five each of early (Dourado Precoce, Guarani, IAC 25, IAC 165, IRAT 112) and medium duration (Amarelão, Araguaia, CNAx 104-13-34-2, IAC 47, IRAT 13) cultivars/lines exhibiting different degrees of susceptibility were compared with the individual components in relation to panicle blast and grain yield with and whithout chemical control. Three sprays of fungicide triciclazol (262 g/ha) were administered beginning from 5% heading. The average panicle blast severity of the treated and untreated plots of early duration cultivar mixture was signiticantly equal or less than the mean disease severity of its components. The performance of cultivar mixtures, in general, was inferior to the improved upland rice cultivars Guarani and Araguaia among the early and médium duration ones, respectively, in relation to panicle blast and grain yield.Foi conduzido, em 1984/85 e 1985/86, estudo sobre misturas de cultivares de arroz de sequeiro, como uma das alternativas para diminuir a severidade de brusone nas panículas, em condições de campo. As misturas de sementes, em proporções iguais, de cinco cultivares precoces (Dourado Precoce, Guarani, IAC 25, IAC 165, IRAT 112) e cinco cultivares/ linhagens de ciclo médio (Amarelão, Araguaia, CNAx 104-13-34-2, IAC 47, IRAT 13), exibindo diferentes graus de suscetibilidade, foram comparadas com os componentes individuais das misturas, em relação à severidade de brusone nas panículas e produção de grãos, com e sem controle químico. Foram feitas três aplicações do fungicida triciclazol (262 g/ha), iniciando-se quando da emissão de 5% das panículas. A severidade média, com e sem aplicação de fungicida nas panículas das misturas de cultivares de ciclo curto, foi igual ou menor que as médias dos componentes. O desempenho das misturas, em relação à brusone nas panículas e na produção, em geral, foi inferior ao das cultivares melhoradas, como Guarani e Araguaia, entre as de ciclo curto e médio, respectivamentePesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraPrabhu, Anne Sitarama2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13606Pesquisa Agropecuaria Brasileira; v.25, n.8, ago. 1990; 1183-1192Pesquisa Agropecuária Brasileira; v.25, n.8, ago. 1990; 1183-11921678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13606/7714info:eu-repo/semantics/openAccess2014-04-17T14:39:57Zoai:ojs.seer.sct.embrapa.br:article/13606Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-17T14:39:57Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Cultivar mixtures in panicle blast control in upland rice Misturas de cultivares no controle de brusone nas panículas em arroz de sequeiro |
title |
Cultivar mixtures in panicle blast control in upland rice |
spellingShingle |
Cultivar mixtures in panicle blast control in upland rice Prabhu, Anne Sitarama Pyricularia oryzae; Oryza sativa; varietal resistance; chemical control; fungicide; epidemiology. Pyricularia oryzae; Oryza sativa; resistência varietal; controle químico,;fungicida; epidemiologia. |
title_short |
Cultivar mixtures in panicle blast control in upland rice |
title_full |
Cultivar mixtures in panicle blast control in upland rice |
title_fullStr |
Cultivar mixtures in panicle blast control in upland rice |
title_full_unstemmed |
Cultivar mixtures in panicle blast control in upland rice |
title_sort |
Cultivar mixtures in panicle blast control in upland rice |
author |
Prabhu, Anne Sitarama |
author_facet |
Prabhu, Anne Sitarama |
author_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Prabhu, Anne Sitarama |
dc.subject.por.fl_str_mv |
Pyricularia oryzae; Oryza sativa; varietal resistance; chemical control; fungicide; epidemiology. Pyricularia oryzae; Oryza sativa; resistência varietal; controle químico,;fungicida; epidemiologia. |
topic |
Pyricularia oryzae; Oryza sativa; varietal resistance; chemical control; fungicide; epidemiology. Pyricularia oryzae; Oryza sativa; resistência varietal; controle químico,;fungicida; epidemiologia. |
description |
During 1984/85 and 1985/86 crop seasons field trials were conducted on cultivar mixtures as one of the alternative measures to restrict the panicle blast severities in upland rice. Two sets of mixtures, five each of early (Dourado Precoce, Guarani, IAC 25, IAC 165, IRAT 112) and medium duration (Amarelão, Araguaia, CNAx 104-13-34-2, IAC 47, IRAT 13) cultivars/lines exhibiting different degrees of susceptibility were compared with the individual components in relation to panicle blast and grain yield with and whithout chemical control. Three sprays of fungicide triciclazol (262 g/ha) were administered beginning from 5% heading. The average panicle blast severity of the treated and untreated plots of early duration cultivar mixture was signiticantly equal or less than the mean disease severity of its components. The performance of cultivar mixtures, in general, was inferior to the improved upland rice cultivars Guarani and Araguaia among the early and médium duration ones, respectively, in relation to panicle blast and grain yield. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-17 |
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/13606 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/13606 |
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/13606/7714 |
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.25, n.8, ago. 1990; 1183-1192 Pesquisa Agropecuária Brasileira; v.25, n.8, ago. 1990; 1183-1192 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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1793416674482847744 |