Management of Manure Breeding Flies Under Caged-Layers with Cga-72662, 1980

Abstract

Abstract Two caged-layer houses, located in Grenada Co., MS., were used to evaluate the insect growth inhibitor CGA-72662 for management of house fly and soldier fly breeding in manure. Each house contained 3 manure pits ca 2.14 m wide x 86.9 m long x 0.10 m deep and housed 20,000 layers. Prior to treatment with CGA-72662, the manure was removed each 10 days and Improved Golden Malrin house fly bait was applied for fly control. One house served as an untreated (control) and the other house received CGA-72662 5% SC metered through the water supply. The growth inhibitor was added to the water supply at the rate of 3 ml per 378.4 liteis of water. The test commenced on Aug 15 end continued to Sep 23. Due to the moist condition of the droppings, the houses were cleaned as the pits filled (ca each 10 to 12 days). Management of fly populations was observed for adult house flies in the houses and adults (of both species) emerging from the feces. Adult house fly counts were taken from the flies resting on the overhead electrical wires. At 3 randomly chosen sites in each house, the number of adult house flies were counted while resting on a 3.05 tn section of wire and averaged. No attempt was made to determine adult soldier fly populations. From each treatment, 300 mature larvae or newly formed pupae (of both species) were removed and placed in emergence containers. Pretreatment observations on Aug 15 indicated that larvae of both fly species were numerous in the pits and adult house fly populations were high. The pits were cleaned on Aug 15. From Aug 18 through Sep 23, the growth inhibitor was metered through the water to the treatment house.