Immature lesser grain borers Rhyzopertha dominica (F.), in wheat exposed to a constant temperature of 41 plus/minus 1 C and an RH of 70 plus/minus 3% were completely controlled. Some immature rice weevils, Sitophilus oryzae (L.), in wheat exposed to a constant temperature of 35 plus/minus 1 C and an RH 60 plus/minus 3% were killed. The reduction in adult emergence was 64% when mature rice weevil larvae and early pupae infested the wheat.