Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control

Detalhes bibliográficos
Autor(a) principal: Agostinetto, Dirceu
Data de Publicação: 2019
Outros Autores: Ulguim, André da Rosa, Zandoná, Renan Ricardo, da Silva, Jéssica Dias Gomes, da Silva, Bruno Moncks, Várgas, Leandro
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Bioscience journal (Online)
Texto Completo: https://seer.ufu.br/index.php/biosciencejournal/article/view/42118
Resumo: In the State of Rio Grande do Sul (RS), Southern Brazil, glyphosate has not been capable of controlling wild poinsettia (Euphorbia heterophylla L.) in soybean fields, thus, suggesting resistance to this herbicide. Therefore, this study aimed at evaluating sensitivity of wild poinsettia biotypes to glyphosate, identifying the occurrence of resistance of wild poinsettia to the herbicide in RS state and determining the resistance factor of wild poinsettia biotypes under suspicion, besides assessing other herbicides as alternative controls. Two greenhouse experiments, which lasted two years, were conducted by a completely randomized design with four replications. Six biotypes (Factor A) and eight doses of glyphosate (Factor B) were used for getting the dose-response curve. Regarding the alternative control, post-emergence herbicides for soybean and corn crops were tested. Control and dry mass of the shoot were analyzed as variables. Resistance factors of resistant biotypes 20.2 and 21.1 were 4.83 and 5.29, respectively, by comparison with the susceptible biotype (11.4). In RS state, there has currently been high selection pressure due to the intensive use of glyphosate against wild poinsettia plants, as the result of the occurrence of biotypes 20.2 and 21.1 which have low levels of resistance to glyphosate and very little control by ALS-inhibiting herbicides. Therefore, an alternative to mitigate the problem is the use of herbicides with different mechanisms of action.
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spelling Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical controlResistência de nível baixo de biótipos de leiteira ao glyphosate e alternativas químicas de controle Euphorbia heterophylladose responseresistance factorweedAgricultural SciencesIn the State of Rio Grande do Sul (RS), Southern Brazil, glyphosate has not been capable of controlling wild poinsettia (Euphorbia heterophylla L.) in soybean fields, thus, suggesting resistance to this herbicide. Therefore, this study aimed at evaluating sensitivity of wild poinsettia biotypes to glyphosate, identifying the occurrence of resistance of wild poinsettia to the herbicide in RS state and determining the resistance factor of wild poinsettia biotypes under suspicion, besides assessing other herbicides as alternative controls. Two greenhouse experiments, which lasted two years, were conducted by a completely randomized design with four replications. Six biotypes (Factor A) and eight doses of glyphosate (Factor B) were used for getting the dose-response curve. Regarding the alternative control, post-emergence herbicides for soybean and corn crops were tested. Control and dry mass of the shoot were analyzed as variables. Resistance factors of resistant biotypes 20.2 and 21.1 were 4.83 and 5.29, respectively, by comparison with the susceptible biotype (11.4). In RS state, there has currently been high selection pressure due to the intensive use of glyphosate against wild poinsettia plants, as the result of the occurrence of biotypes 20.2 and 21.1 which have low levels of resistance to glyphosate and very little control by ALS-inhibiting herbicides. Therefore, an alternative to mitigate the problem is the use of herbicides with different mechanisms of action.As falhas de controle de leiteira (Euphorbia heterophylla L.) após aplicação de glyphosate em lavouras de soja do Rio Grande do Sul (RS) são frequentes, sugerindo a resistência ao herbicida. Diante disso, os objetivos foram avaliar a sensibilidade de biótipos de leiteira ao herbicida glyphosate, identificar a ocorrência da resistência, determinar o fator de resistência de biótipos de leiteira com suspeita de resistência e avaliar herbicidas alternativos para o seu controle. Foram conduzidos dois experimentos em casa de vegetação, em delineamento inteiramente casualizado com quatro repetições ambos realizados em dois anos. No experimento de curva dose-resposta foram utilizados cinco biótipos (fator A) e oito doses do herbicida glyphosate (fator B). Para o controle alternativo, foram testados herbicidas em pós emergência das culturas de soja e milho. As variáveis analisadas foram controle e massa seca da parte aérea. O fator de resistência dos biótipos resistentes (20.2 e 21.1) foram 4,83 e 5,29 comparativamente ao biótipo suscetível (11.4) respectivamente. Existe elevada pressão de seleção pelo glyphosate em plantas de leiteira no RS, observando-se a ocorrência de biótipos 20.2 e 21.1 com resistência de nível baixo ao herbicida e com controle reduzido pelos herbicidas inibidores de ALS. Portanto, uma alternativa para atenuar o problema é o uso de herbicidas com diferentes mecanismos de ação.EDUFU2019-08-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/4211810.14393/BJ-v35n4a2019-42118Bioscience Journal ; Vol. 35 No. 4 (2019): July/Aug.; 1060-1070 Bioscience Journal ; v. 35 n. 4 (2019): July/Aug.; 1060-1070 1981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/42118/26651Brazil; ContemporaryCopyright (c) 2019 Dirceu Agostinetto, André da Rosa Ulguim, Renan Ricardo Zandoná, Jéssica Dias Gomes da Silva, Bruno Moncks da Silva, Leandro Várgashttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessAgostinetto, DirceuUlguim, André da RosaZandoná, Renan Ricardoda Silva, Jéssica Dias Gomesda Silva, Bruno MoncksVárgas, Leandro2022-01-26T12:46:48Zoai:ojs.www.seer.ufu.br:article/42118Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-01-26T12:46:48Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false
dc.title.none.fl_str_mv Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
Resistência de nível baixo de biótipos de leiteira ao glyphosate e alternativas químicas de controle
title Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
spellingShingle Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
Agostinetto, Dirceu
Euphorbia heterophylla
dose response
resistance factor
weed
Agricultural Sciences
title_short Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
title_full Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
title_fullStr Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
title_full_unstemmed Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
title_sort Low level resistance of wild poinsettia biotypes to glyphosate and alternative chemical control
author Agostinetto, Dirceu
author_facet Agostinetto, Dirceu
Ulguim, André da Rosa
Zandoná, Renan Ricardo
da Silva, Jéssica Dias Gomes
da Silva, Bruno Moncks
Várgas, Leandro
author_role author
author2 Ulguim, André da Rosa
Zandoná, Renan Ricardo
da Silva, Jéssica Dias Gomes
da Silva, Bruno Moncks
Várgas, Leandro
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Agostinetto, Dirceu
Ulguim, André da Rosa
Zandoná, Renan Ricardo
da Silva, Jéssica Dias Gomes
da Silva, Bruno Moncks
Várgas, Leandro
dc.subject.por.fl_str_mv Euphorbia heterophylla
dose response
resistance factor
weed
Agricultural Sciences
topic Euphorbia heterophylla
dose response
resistance factor
weed
Agricultural Sciences
description In the State of Rio Grande do Sul (RS), Southern Brazil, glyphosate has not been capable of controlling wild poinsettia (Euphorbia heterophylla L.) in soybean fields, thus, suggesting resistance to this herbicide. Therefore, this study aimed at evaluating sensitivity of wild poinsettia biotypes to glyphosate, identifying the occurrence of resistance of wild poinsettia to the herbicide in RS state and determining the resistance factor of wild poinsettia biotypes under suspicion, besides assessing other herbicides as alternative controls. Two greenhouse experiments, which lasted two years, were conducted by a completely randomized design with four replications. Six biotypes (Factor A) and eight doses of glyphosate (Factor B) were used for getting the dose-response curve. Regarding the alternative control, post-emergence herbicides for soybean and corn crops were tested. Control and dry mass of the shoot were analyzed as variables. Resistance factors of resistant biotypes 20.2 and 21.1 were 4.83 and 5.29, respectively, by comparison with the susceptible biotype (11.4). In RS state, there has currently been high selection pressure due to the intensive use of glyphosate against wild poinsettia plants, as the result of the occurrence of biotypes 20.2 and 21.1 which have low levels of resistance to glyphosate and very little control by ALS-inhibiting herbicides. Therefore, an alternative to mitigate the problem is the use of herbicides with different mechanisms of action.
publishDate 2019
dc.date.none.fl_str_mv 2019-08-08
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.ufu.br/index.php/biosciencejournal/article/view/42118
10.14393/BJ-v35n4a2019-42118
url https://seer.ufu.br/index.php/biosciencejournal/article/view/42118
identifier_str_mv 10.14393/BJ-v35n4a2019-42118
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.ufu.br/index.php/biosciencejournal/article/view/42118/26651
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv Brazil; Contemporary
dc.publisher.none.fl_str_mv EDUFU
publisher.none.fl_str_mv EDUFU
dc.source.none.fl_str_mv Bioscience Journal ; Vol. 35 No. 4 (2019): July/Aug.; 1060-1070
Bioscience Journal ; v. 35 n. 4 (2019): July/Aug.; 1060-1070
1981-3163
reponame:Bioscience journal (Online)
instname:Universidade Federal de Uberlândia (UFU)
instacron:UFU
instname_str Universidade Federal de Uberlândia (UFU)
instacron_str UFU
institution UFU
reponame_str Bioscience journal (Online)
collection Bioscience journal (Online)
repository.name.fl_str_mv Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)
repository.mail.fl_str_mv biosciencej@ufu.br||
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