Data/hora: 01/06/2024 10:24:58

Provedor de dados: | 1
País: | Brazil

Título:

Multiple resistance of Conyza sumatrensis to three mechanisms of action of herbicides

Multiple resistance of Conyza sumatrensis to three mechanisms of action of herbicides

Autores: | Albrecht, Alfredo Junior Paiola; Pereira, Vinicius Gabriel Caneppele; Souza, Cristian Natalino Zanfrilli de; Zobiole, Luiz Henrique Saes; Albrecht, Leandro Paiola; Adegas, Fernando Storniolo.
Data: | 2020-04-03
Ano: | 2020
Palavras-chave: | Conyza spp.; Dose-response; Paraquat; Glyphosate; Chlorimuron. Conyza spp.; Dose-response; Paraquat; Glyphosate; Chlorimuron.
Resumo: | Fleabane (Conyza spp.) is an important weed in grain production systems and is currently one of the most problematic weeds in Brazil. An important factor related to weeds such as fleabane is the characteristic of herbicide-resistant biotypes developed under selection pressure, with multiple resistance previously detected for Conyza spp. Thus, the aim of this study was to demonstrate the multiple resistance of Conyza sumatrensis to the herbicides paraquat, glyphosate, and chlorimuron. From the F2 seeds of biotypes with suspected resistance to paraquat, glyphosate, and chlorimuron, dose-response greenhouse experiments were conducted for the three herbicides. Herbicides were applied when the plants had 6-8 leaves that were at a height of 8 cm. At the end of the evaluations, 28 days after application, multiple resistance to paraquat, glyphosate, and chlorimuron was observed, with resistance factors (RF50) for the control of 7.43, 3.58, and 14.35 and for the reduction of dry mass of 2.65, 2.79, and 11.31, respectively. All the established criteria for demonstrating new cases of weed resistance were met; thus, the first case worldwide of a Conyza species with resistance to herbicides with three different mechanisms of action was confirmed.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42485

10.4025/actasciagron.v42i1.42485

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42485/751375149824
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; Vol 42 (2020): Publicação contínua; e42485

Acta Scientiarum. Agronomy; v. 42 (2020): Publicação contínua; e42485

1807-8621

1679-9275

Fonte:

Copyright (c) 2020 Acta Scientiarum. Agronomy

https://creativecommons.org/licenses/by-nc-nd/4.0