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Fenthion Spot Treatment for Cnotrol of the Hog Louse^{1 ,2,}

University of Kentucky^,5, Lexington 40506

Abstract

A 20% solution of fenthion applied to hogs in one spot on the back at the rate of 2 ml/45.5 kg of body weight was effective in controlling hog lice on feeder hogs, dry sows on pasture and sows nursing pigs. Lice were controlled on the nursing although they were not directly treated. Fenthion was superior in lice control to the standard .25% crotoxyphos + vapona spray.

¹ Anoplura: Haematopinidae, Haematopinus suis (L).

² The investigation reported in this paper (No. 76-7-5-170) is published with approval of the Director of the Kentucky Agricultural Experiment Station supported in part by the Bayvet Div. Cutter Laboratories, Inc., Shawnee Mission, KS 66201.

³ Professor and Assistant Professor of Entomology, College of Agriculture, University of Kentucky, Lexington, 40506.

⁴ Professor of Animal Science, College of Agriculture, University of Kentucky, Lexington, 40506.

⁵ Department of Entomology.