Data/hora: 11/06/2024 16:48:39

Provedor de dados: | 87
País: | Brazil
Título: | Herbicide resistant barnyardgrass in Iran and Turkey
Autores: | Haghnama,Kianoosh; Mennan,Husrev.
Data: | 2020-01-01
Ano: | 2020
Palavras-chave: | Dose-response; Echinochloa crus-galli; Multiple-herbicide resistance; Rice.
Resumo: | Abstract  Background:  Inconsistent control of Barnyardgrass has been reported repeatedly by farmers in major rice growing areas of Iran and Turkey.  Objective:  Thus, a greenhouse study was conducted to investigate the resistance of Barnyardgrass to acetyl CoA carboxylase (cyhalofop-butyl) and acetolactate synthase (penoxsulam, bispyribac-sodium) inhibiting herbicides.  Methods:  The seeds were sown in pots in a greenhouse and after screening, were sprayed with various rates of cyhalofop-butyl, penoxsulam and bispyribac-sodium herbicides at 3-4 leaf stage. Four weeks later, the above ground biomass was cut, dried in an oven and weighted. The results were then analyzed in the R software (drc package) using a four or three parameter log-logistic function. All experiments were repeated twice.  Results:  While 30% of biotypes collected from Turkey were not controlled by ACCase inhibitors at twice the recommended rates, no resistance was observed in Iran’s samples. Only one biotype exhibited cross-resistant to penoxsulam and bispyribac-sodium in Iran, which was due to consecutive application of herbicides with modes of action similar to these herbicides. In contrast, several Turkish biotypes showed cross-resistance as well as multiple resistance to ACCase and ALS inhibitors.  Conclusions:  The rapid expansion of herbicide resistance in both countries indicate the necessity of adopting integrated weed management practices to hinder the further evolution of resistance in future.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100310
Editor: | Sociedade Brasileira da Ciência das Plantas Daninhas
Relação: | 10.1590/s0100-83582020380100060
Formato: | text/html
Fonte: | Planta Daninha  v.38 2020
Fonte: | info:eu-repo/semantics/openAccess