Bixlozone Metabolism in Crop and Weed Species: A Basis for Selectivity and Evolved Resistance

Metabolism of Bixlozone was investigated to selectively control annual ryegrass (Lolium rigidum) in Australian cereal and canola crops. The metabolic fate of bixlozone on seedlings demonstrated that crop selectivity of bixlozone is due to either a lack of capacity for bixlozone activation to phytotoxic 5-ketobixlozone (canola) or enhanced production of low-toxicity hydroxylated metabolites (wheat and barley).