Insecticide Tests Against the Tropical Horse Tick, Dermacentor nitens, on Horses1
Authors: DRUMMOND, R..O.; GRAHAM, O..H.
Source: Journal of Economic Entomology, Volume 57, Number 4, August 1964 , pp. 549-553(5)
Publisher: Entomological Society of America
Abstract:In Tamaulipas, Mexico, and Florida, U.S.A., small-scale Field tests were conducted with several insecticides applied to horse's infested with Dermacentor nitens Neumann, the tropical horse tick. In :Mexico, all stages of this one-host species were found in the ears of horses. The ears were treated by hand with insecticide in water, mineral oil, smears, dusts, and other formu- lations, and the bodies sprayed with the same insecticides in At 1 week after treatment, ticks were scraped from the horses' ears, and mortality counts made to determine the effectiveness of the treatments. Limited data indicated all treat- . ments killed many ticks, but some differences in effectiveness were observed. Highly effective treatments were 0.5% carbaryl, 0.1% Compound 4072 (2-ehloro-1-(2,4-dichlorophenyl) vinyl diethyl phosphate), .5% coumaphos dust, 1% dioxathion in mineral oil, EQ-335smear, and 5% ronnel smear; less effective Were(0.25%coumaphos, 0.75% lindane in ear tick remedy, and 0.15% dioxathion; least effective treatments were 0.05% di- azinon, 0.03% lindane, 0.5% malathion, 0.5% ronnel, and 0.5% toxaphene. In Florida, the ears of horses were infested and in most cases all stages were found in the nostrils and manes; with some horses, ticks were found between the ears, and on the belly and tail. The ears and nostrils were treated by hand an the bodies sprayed. Horses were examined 1 and 2 weeks post-. treatment. More effective treatments for ears and nostrils were 0..5% carbaryl, 0.0.5%carhophenothion, 0.1% Compound 4072 5% coumaphos dust, 0.15% dioxathion, EQ33.5 smear, and 0.7.5% ronnel; less effective treatments were 0.1% fenthion, 0.25% coumaphos, 0.03% and 1% lindane, and 0.5% malathion.
In one small test, trichlorfon in feed for 10 days at 20 mg/kg/day and fenthion in feed for 5 days at 5 mg/kg/day were systemically effective against D. nitcus in the cars of horses that consumed treated feed.
Document Type: Research Article
Publication date: August 1964
- 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.
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