METRIBUZIN RESIDUES IN LENTIL FOLLOWING POSTEMERGENCE APPLICATION

In a study involving two sites in western Canada, residues of the herb icide metribuzin in lentil were monitored by gas chromatography follow ing postemergence application at 0.28 kg a.i. ha(-1). On the day of sp raying, initial residues in lentil green foliage were of the order of 1 mg kg(-1). Metribuzin residues in the green foliage continually decr eased with time to non-detectable levels (< 0.02 mg kg(-1)) at 42 d af ter application. No metribuzin residues were detected in the straw or mature seed.