House Fly Control Studies in Chatham County, Georgia1

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Abstract
In 1957, residual applications of chlorinated hydrocarbons and organophosphorus compounds and insecticide impregnated cord installations were evaluated in Chatham County, Georgia, for control of house fly populations. EPN:DDT suspensions (25:200 mg./sq. ft.) provided satisfactory fly control for 3 to 7 weeks, an EPN :sugar suspension (25:62.5 mg./sq. ft.) failed to provide control, and a DDT suspension (200 mg./sq. ft.) gave excellent to satisfactory control for 8 weeks. Dow ET-57 (sampled as Dow ET-14) emulsions and suspensions produced acceptable control for 9 to 11 weeks (200 mg./sq. ft.) and for 4 to 5 weeks (100 mg./sq. ft.). A Dipterex:sugar water solution 200:500 mg./sq. ft.) yielded excellent control for 10 weeks at one dairy but was effective for only 2 weeks at a second dairy. Re-treatment of the latter dairy provided 6 weeks of satisfactory control. Emulsions of malathion: DDT: sugar; Guthion: sugar; General Chemical Compound 3707; or suspensions of lindane or methoxychlor failed to give control. Parathion-impregnated cotton cords (3/32”diameter), Diazinon-impregnated cords (⅛” or 3/16” diameter) and parathion-Diazinon treated cords (3/32” diameter) provided excellent to satisfactory fly control in dairy barns and a chicken ranch, for periods of approximately 9 to 15 weeks.

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