Data/hora: 11/06/2024 05:24:07

Provedor de dados: | Planta Daninha
País: | Brazil
Título: | Sensitivity of weedy rice populations to Quizalofop
Autores: | M. Oliveira Neto,Antonio; Guerra,Naiara; Coffin,Maxwell; R. Burgos,Nilda; de Andrade,Alexander; Noldin,José A.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Aryloxyphenoxypropionate; ACCase inhibitor; Red rice; Oryza sativa.
Resumo: | Abstract  Background:  Rice lines displaying resistance to quizalofop-p-ethyl (quizalofop), an acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicide, were developed to facilitate control of imidazolinone-resistant weedy rice (red rice), as well as other susceptible grasses.  Objective:  To assess the sensitivity of weedy rice accessions from Brazil to quizalofop.  Methods:  Two bioassays were conducted on the greenhouse from March to June 2016, in a completely random design with a two-factor factorial combination of treatments and four replications. The factor A was weedy rice accession and factor B was quizalofop rates (0, 25 and 50 g a.i. ha-1). It was assessed a total of 84 genotypes in the two bioassays, composed of 78 weedy rice accessions, 4 rice cultivars, and 2 lines resistant to aryloxyphenoxypropionate (AOPP) herbicides. Quizalofop was applied the 2-leaf stage. Weedy rice control was evaluated at 28 and 22 days after treatment (DAT), respectively for bioassay I and II, using a scale of 0% (no control) to 100% (dead).  Results:  All weedy rice accessions were susceptible to quizalofop, being controlled 100% with 50 g a.i. ha-1. Rice lines SC 964 and SC 965, resistant to AOPP herbicides, were not injured by quizalofop.  Conclusions:  quizalofop is an effective tool for weedy rice control in ACCase-resistant rice.
Tipo: | Info:eu-repo/semantics/report
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100650
Editor: | Sociedade Brasileira da Ciência das Plantas Daninhas
Relação: | 10.1590/s0100-83582020380100083
Formato: | text/html
Fonte: | Planta Daninha  v.38 2020
Fonte: | info:eu-repo/semantics/openAccess