CONTROL OF WILD OATS IN WHEAT WITH BENZOYLPROP-ETHYL

Abstract

Benzoylprop-ethyl (ethyl-N-benzoyl-N (3,4-dichlorophenyl)-2-amino-propionate) at 1.1 to 5.5 kg/ha gave good control of wild oats (Avena fatua L.) resulting in significantly higher yields of wheat (Triticum aestivum L. cv. Manitou and Neepawa). Late herbicide application (4-leaf growth stage of wild oats) provided better wild oat control and slightly better wheat yields than early application (1.5-leaf stage) in 1969 but not in 1970. Of the three herbicide formulations evaluated, the FX 2182 liquid formulation gave slightly higher wheat yields. Benzoylprop-ethyl at 1.4 kg/ha in mixture with TCA (sodium salt of trichloroacetic acid) at 0.56 kg/ha was less effective in controlling wild oats than benzoylprop-ethyl alone, but wheat yields were unaffected. However, addition of the amine salt of 2,4-D ((2,4-dichlorophenoxy) acetic acid) or MCPA ([(4-chloro-o-tolyl) oxy] acetic acid) at 0.56 kg/ha to benzoylprop-ethyl/TCA mixtures significantly reduced the efficiency of benzoylprop-ethyl for wild oat control and reduced wheat tolerance resulting in lower yields.