Insect Growth Regulators: Laboratory and Field Evaluations of Thompson-Hayward TH-6040 Against the House Fly and the Stable Fly13

Abstract

In the laboratory, the insect growth regulator, Thompson-Hayward TH-6040, (N-(4-chlorophenyl)-N′-(2,6-difluorobenzoyl)-urea), prevented the emergence of the house fly, Musca domestica L., and the stable fly, Stomoxys calcitrans (L.), when it was applied topically at a rate of 1 mg/ft² of surface breeding area. In a cattle feedlot and at a waste water treatment plant, TH-6040 applied to the surface of the breeding area at a rate of 50 mg/ft² gave 90% control of house flies. The TH-6040 apparently is effective only by ingestion. The IGR caused a disruption in the cuticle formation of the house fly and the stable fly during larval-pupal metamorphosis.