Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Acta Scientiarum. Agronomy (Online) |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120 |
Resumo: | In Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate susceptibility ranking of the sourgrass biotypes was MG < GO < MT < BA. The MT and BA biotypes demonstrated high glyphosate resistance levels, and the GO biotype had a high potential to develop resistance. Farmers should avoid the application of glyphosate overdoses to minimize the selection pressure on weeds. |
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Acta Scientiarum. Agronomy (Online) |
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Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fieldschemical controlDigitaria insularisdose responseresistance factor.FitotecniaFitotecniaIn Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate susceptibility ranking of the sourgrass biotypes was MG < GO < MT < BA. The MT and BA biotypes demonstrated high glyphosate resistance levels, and the GO biotype had a high potential to develop resistance. Farmers should avoid the application of glyphosate overdoses to minimize the selection pressure on weeds. Universidade Estadual de Maringá2018-02-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionEmpirical researchPesquisa Empíricaapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3512010.4025/actasciagron.v40i1.35120Acta Scientiarum. Agronomy; Vol 40 (2018): Publicação Contínua; e35120Acta Scientiarum. Agronomy; v. 40 (2018): Publicação Contínua; e351201807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120/pdfCopyright (c) 2017 Acta Scientiarum. Agronomyinfo:eu-repo/semantics/openAccessSilveira, Hellen Martins daLangaro, Ana Claudiala Cruz, Ricardo Alcántara-deSediyama, TocioSilva, Antonio Alberto2019-09-24T12:26:47Zoai:periodicos.uem.br/ojs:article/35120Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2019-09-24T12:26:47Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
title |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
spellingShingle |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields Silveira, Hellen Martins da chemical control Digitaria insularis dose response resistance factor. Fitotecnia Fitotecnia |
title_short |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
title_full |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
title_fullStr |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
title_full_unstemmed |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
title_sort |
Glyphosate efficacy on sourgrass biotypes with suspected resistance collected in GR-crop fields |
author |
Silveira, Hellen Martins da |
author_facet |
Silveira, Hellen Martins da Langaro, Ana Claudia la Cruz, Ricardo Alcántara-de Sediyama, Tocio Silva, Antonio Alberto |
author_role |
author |
author2 |
Langaro, Ana Claudia la Cruz, Ricardo Alcántara-de Sediyama, Tocio Silva, Antonio Alberto |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silveira, Hellen Martins da Langaro, Ana Claudia la Cruz, Ricardo Alcántara-de Sediyama, Tocio Silva, Antonio Alberto |
dc.subject.por.fl_str_mv |
chemical control Digitaria insularis dose response resistance factor. Fitotecnia Fitotecnia |
topic |
chemical control Digitaria insularis dose response resistance factor. Fitotecnia Fitotecnia |
description |
In Brazil, infestations of crop areas with glyphosate-resistant (GR) sourgrass (Digitaria insularis (L.) Fedde) biotypes has risen significantly, increasing crop production costs. Glyphosate efficacy on three biotypes (GO, BA and MT) of sourgrass with suspected resistance was evaluated. A susceptible biotype (MG) was used as the control. The results confirmed that the MG and GO biotypes were susceptible to glyphosate (control > 90%). The MG biotype exhibited growth reduction and mortality by 50% (GR50 and LD50, respectively) with mean glyphosate doses of 243.7 and 431.6 g ae ha-1. The resistance index of the biotypes with suspected resistance ranged from 2.8 to 6.1 in relation to GR50 and between 1.4 to 26.7 in relation to LD50. The glyphosate susceptibility ranking of the sourgrass biotypes was MG < GO < MT < BA. The MT and BA biotypes demonstrated high glyphosate resistance levels, and the GO biotype had a high potential to develop resistance. Farmers should avoid the application of glyphosate overdoses to minimize the selection pressure on weeds. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-02-09 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Empirical research Pesquisa Empírica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120 10.4025/actasciagron.v40i1.35120 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120 |
identifier_str_mv |
10.4025/actasciagron.v40i1.35120 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35120/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2017 Acta Scientiarum. Agronomy info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2017 Acta Scientiarum. Agronomy |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
publisher.none.fl_str_mv |
Universidade Estadual de Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Agronomy; Vol 40 (2018): Publicação Contínua; e35120 Acta Scientiarum. Agronomy; v. 40 (2018): Publicação Contínua; e35120 1807-8621 1679-9275 reponame:Acta Scientiarum. Agronomy (Online) instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum. Agronomy (Online) |
collection |
Acta Scientiarum. Agronomy (Online) |
repository.name.fl_str_mv |
Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br |
_version_ |
1799305909990588416 |