AbstractThe metabolism of the wild oat herbicide flamprop‐methyl, methyl (±)‐2‐N‐(3‐chloro‐4‐fluorophenyl)benzamidopropionate, in spring wheat grown to maturity has been studied under glasshouse and outdoor conditions. 14C‐Flamprop‐methyl labelled separately in the halophenyl ring and the carbonyl of the benzoyl group was used. The major metabolite formed in plants was the corresponding carboxylic acid, II, which also occurred as conjugates. Other minor metabolites detected under glasshouse conditions only were the 3‐ and 4‐hydroxybenzoyl analogues of flamprop‐methyl and 3′‐chloro‐4′‐fluorobenzanilide. The soil in which the plants were grown contained residues comprising mainly flamprop‐methyl and II together with smaller am
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