Insecticidal treatments against Heteronychus consimilis Kolbe, a serious pest of wheat in Kenya, killed large numbers of adults and markedly reduced the damagedone by them. Subsequent damage by larvae was prevented.

The most effective of the treatments tested were aldrin at 7.2 oz. per acre applied with the fertiliser, BHC in the form of Mergamma A applied as a seed dressing at 3¼ oz. per acre, and BHC in the form of Agrocide 7 applied as a seed dressing at 3¼ lb. per acre. The best treatments resulted in considerable increases in yield and gave promise of effective practical control on a large scale.