Tests with Insecticides for Control of Lice on Goats and Sheep

In laboratory tests, Angora goats infested with biting lice (Bovicola spp.) were dipped in 13 insecticides. All but 0.1% and 0.25% chlorobenzilate and 0.1% carbaryl freed goats of lice. In field tests, 22 herds of goats infested with biting lice and goat sucking lice (Linognathus stenopsis (Burmerister)) and 3 flocks of sheep infested with sheep biting lice (Bovicola ovis (L.)) were sprayed with 11 insecticides. All except 0.5% methoxychlor controlled existing populations of motile lice. Biting lice were controlled from shearing to shearing on goats sprayed with 0.25% Ruelene® (O-4-tert-butyl-2-chlorophenyl O-methyl methylphosphoramidate) and on sheep sprayed with 0.25% General Chemical 4072 (2-chloro-1(2,4-dichlorophenyl)vinyl diethyl phosphate) and 0.25% V-C 13 Nemacide® (0-2,4-dichlorophenyl O,O-diethyl phosphorothioate). Sucking lice were controlled from shearing to shearing on goats sprayed with 0.25% General Chemical 472 and 0.25% Relene.