Interactive Response of the Horn Fly (Diptera: Muscidae) and Selected Breeds of Beef Cattle
Authors: STEELMAN, C. DAYTON; BROWN, JR., A. HAYDEN; GBUR, EDWARD E.; TOLLEY, G.
Source: Journal of Economic Entomology, Volume 84, Number 4, August 1991 , pp. 1275-1282(8)
Publisher: Entomological Society of America
Abstract:Statistically significant differences were observed in the population density of the horn fly, Haematobta irritans irritans (L.), on different breeds of beef cattle. The European breed Chianina had a population density of horn flies generally ::>;50%than that of the British cattle breeds (Angus, Hereford, Polled Hereford, and Red Poll) and another European breed (Charolais). Generally, no significant difference existed among numbers of horn flieson Hereford, Polled Hereford, and Red Pollcows in 1988 or among Angus,Hereford, Polled Hereford, and Red Poll cows in 1989. Factors other than color appeared to be involved in the selective process between the horn fly and its host. Population densities on two white European breeds (Charolais and Chianina) were significantly different on all weekly intervals except for 4 wk in both 1988 and 1989. No significant difference existed among Charolais and British breeds except during 4 wk in 1988 and 3 wk in 1989. When weaning weights of all calves were adjusted for the effects of age to 205 d, sex of calf, and age of dam, the indirect effect of the horn fly on weaning weight showed a significant linear regression. Each 100 flies per cow caused a reduction of 8.1 kg in calf weaning weight. Cows within each breed with low numbers of horn flies weaned significantly heavier calves than cows with higher numbers of horn flies.
Document Type: Research Article
Publication date: August 1, 1991
- 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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