EFFECTIVENESS OF 3 RESIDUAL INSECTICIDE FORMULATIONS TO CONTROL RED FLOUR BEETLES (COLEOPTERA, TENEBRIONIDAE) ON PAINTED AND UNPAINTED STEEL

Three insecticides were tested for efficacy against adult red flour beetles on painted and unpainted steel plates. Microencapsulated formulations of chlorpyrifos and diazinon provided 100% control for 47 weeks on both painted and unpainted surfaces. A lacquer-based formulation of chlorpyrifos was not as effective and could have been affected by paint. These findings have importance in the control of stored product insect pests on painted metal surfaces, including the decks of naval vessels.