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To investigate reports on resistance or goat biting lice (Bovicola caprae (Gurlt) and B. limbatus (Gerv.)) to chlorinated hydrocarbon insecticides, goats from two ranches near Kerrville, Texas, were dipped into insecticides at dosages recommended by the Entomology Research Division, U. S. Department of Agriculture. Lice from one ranch were not killed by 0.25% toxaphene, which previously had been very effective. Field tests were conducted with sprays of Delnav® (2,3-p-dioxanedithiol S,S- bis(O,O-diethyl phosphorodithioate )), ronnel, malathion, Dipterex® (O,O-dimethyl 2,2,2-trichloro-l-hydroxyethylphosphon- ate), Bayer 21/199 (O-(S-chloro-4-methylumbelliferone) 0,0- diethyl phosphorothioate), Sevin®(1-naphthyl N-methyl carbamate), and toxaphene for the control of biting lice and sucking lice (Linognathus stenopsis (Burm.)) Toxaphene and 0.1% Delnav failed to kill lice. Others were effective within 24 hours on goats with fleece shorter than 10 weeks' growth, and from g to 5 days on goats with longer fleece. Flocks sprayed with 0.5% ronnel, 0.1% Bayer 21/199, and 0.5% Sevin were free of lice at the next shearing (2 to 4 months).
Document Type: Research Article
Publication date: October 1, 1959
More about this publication?
Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.