AbstractThe herbicide benzoylprop‐ethyl SUFFIX,aethyl (±)‐2‐(N‐benzoyl‐N‐3,4‐di‐chloroanilino) propionate has been applied in a radiolabelled form to spring wheat and winter wheat growing both indoors and outdoors. During the application the compound also fell onto the soil. The plants and corresponding soils were examined at harvest at 71‐98 days from treatment.Conversion of the herbicide occurred in plants and soil predominantly by a hydrolytic reaction to form benzoylpropbfollowed in plants by its conjugation with sugars. Small amounts ofN‐benzoyl‐3,4‐dichloroaniline and benzoic acid were also detected in plants. There was no evidence for the presence of 3,4‐dichloroaniline in the crops or soils nor was there evidence for 3,4,3′,4′‐tetra‐chloroazobenzene which has been implicated as a degradation product of some 3,4‐dichloroaniline herbicides in soils.Residues on plants were greatest in the straw and consisted mainly of benzoylprop‐ethyl and benzoylprop in free and conjugated forms. There was no evidence for appreciable movement of the compound within the plant from the treated foliage. Residues were particularly low in the grain and were not detected in the crop grown outdoors (limit of detectability 0.01 mg/kg). Residues in the soils were mainly in the 0‐7.5 cm layer and there
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