Tests with Insecticides for Control of Lice on Goats and Sheep

Abstract

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.