Control of Larvae of the House Fly and the Horn Fly in Manure of Insecticide-Fed Cattle1

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Abstract
Larvae or eggs of the house fly, Musca domestica L., or the horn fly, Haemalobia irritans (L.), or both, were added to manure from cattle fed 11 insecticides for 10 days. The numbers of adults that emerged were used to calculate the effects of the treatments. Mg per kg per day of insecticides effective against horn fly larvae were: 0.5 (lowest dosage tested) of Bay 37341 (O, O-diethyl O-[4-(methylthio)-3,5-xylyl] phosphorothioate); 1.0 of Bay 37342 (O, O-dimethyl O-[4-(methylthio)-3,5-xylyl] phosphorothioate); 10.0 (only dosage tested) of bromophos; 2.5-5.0 of famphur; 0.5-1.0 of fenthion; 1.5 (but not 2.0) of Imidan® (O, O-dimethyl S-phthalimidomethyl phosphorodithioate); 10.0 (only dosage tested) of Shell SD-8447 (2-chloro-1-(2,4,5-trichlorophenyl)vinyl dimethyl phosphate); and 2.5 of Stauffer R-3828 (S-(p-chloro-alpha-phenylbenzyl) O, O-diethyl phosphorodithioate). Mg per kg per day of insecticides effective against house fly larvae were: 5.0 of Bay 37342 (partially effective) and 10.0 (only dosage tested) of bromophos and SD-8447.

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