Data/hora: 05/06/2024 08:29:27

Provedor de dados: | 87
País: | Brazil
Título: | First report of Amaranthus viridis resistance to herbicides
Autores: | Francischini,A.C.; Constantin,J.; Oliveira JR.,R.S.; Santos,G.; Braz,G.B.P.; Dan,H.A.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Trifloxysulfuron-sodium; Pyrithiobac-sodium; Slender amaranth; ALS-inhibiting herbicides.
Resumo: | Due to the limited number of herbicides registered for the control of dicot weeds in cotton crops, ALS inhibitors have been used on an intensive and recurrent basis. Given that, cases of poor weed control have been described after application of these herbicides in the main cotton producing areas in Brazil, the purpose of the present work was to evaluate the occurrence of resistance to ALS herbicides in Amaranthus viridis biotypes from those areas. Dose-response curves were prepared after pre-emergence applications of trifloxysulfuron-sodium (0; 1.8; 3.7; 7.5; 15 and 30 g ha-1) and pyrithiobac-sodium (0; 35; 70; 140; 280 and 560 g ha-1), equivalent to 0, ¼, ½, 1, 2 and 4 times the recommended commercial rates. The selection of trifloxysulfuron-sodium resistant biotypes of A. viridis was confirmed in samples from Bahia (BA 7, BA 8, BA 9 and BA 11). However, no resistance to pyrithiobac-sodium was found for biotypes either from Bahia or from Mato Grosso do Sul.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000300013
Editor: | Sociedade Brasileira da Ciência das Plantas Daninhas
Relação: | 10.1590/S0100-83582014000300013
Formato: | text/html
Fonte: | Planta Daninha  v.32 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess