Relative Susceptibility of Oats (Avena sativa) and Wheat (Triticum aestivum) to Fluazifop, Haloxyfop, and Sethoxydim

Abstract

The purpose of the research was to determine the effect of several postemergence herbicides on transpiration and growth of seedling oats and wheat. Fluazifop, haloxyfop, and sethoxydim were applied postemergence at various rates to oats and wheat in the 1- to 2-leaf stage in controlled environment rooms and the field. In all cases where transpiration was reduced significantly, oats were affected more than wheat. Generally, haloxyfop and sethoxydim in both controlled environments and the field suppressed oat growth more than wheat. Fluazifop controlled both small grain species equally in the field, but oats were suppressed more under controlled environment conditions. Effects of the three herbicides were always greater in the controlled environments than in the field.

Efeito de herbicidas graminicidas, aplicados em pós-emergência, sobre aveia branca, aveia preta e trigo

“…Na Au st rá li a e Est ado s Uni dos , tam bém já for am enc ont rad os alguns genótipos de aveias silvestres (Avena falua e Avena sterilis) que apresentavam resistência aos herbicidas do grupo dos ariloxifenoxipropionatos (Mansooji et al, 1992). Beardmore & Linscott (1989), testando os herbicidas haloxyfop e sethoxydi m, constatar am que as doses requeridas para reduzir metade da população de aveia e trigo era maior para trigo do que para aveia, o que não ocorreu com o composto fluazifop que, em condições de campo, controlou igualmente trigo e aveia.…”