DDT to Control Flies Breeding in Poultry Manure12

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Abstract
At least 24 spp. of flies, 9 beetles, 6 parasitic wasps and 1 moth were reared from chicken manure accumulated on the dropping boards of the laying batteries at the poultry farm of the Univ. of Hawaii Agric. Expt. Sta. Ten of the flies are of possible economic importance to man and domestic animals, the predominant one being the house fly, Musca domestica. A 2-gal. knapsack sprayer was used in spraying the manure. A 0.25% water miscible emulsion of DDT when applied at about 9 pints per 100 sq. ft. has been found to control adequately the breeding of 4 spp. of flies: Musca domestica, Fannia pusio, Chrysomyia megacephala, and Ophyra chalcogaster. Increasing the concn. of DDT to 0.5% resulted in 90 to 100% control of the breeding. The hover fly, Volucella obesa, and the soldier fly, Hermetia illucens, tolerated concns. of DDT emulsions as high as 1%. The addition of lime to the manure makes the manure unsuitable for the breeding of the latter 2 spp. DDT as a water suspension spray is approx. 1/4 as effective as in the form of an emulsion spray. The dust, even at a concn. of 10% DDT, is not satisfactory. It has not been determined what effect DDT might have on plants when DDT-treated manure is used as fertilizer.

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