Impact of Cattle Grub (Hypoderma spp.) (Diptera: Oestridae) Infestations on Performance of Beef Cattle1
Authors: SCHOLL, PHILIP J.; HIRONAKA, ROBERT; WEINTRAUB, JEROME
Source: Journal of Economic Entomology, Volume 81, Number 1, February 1988 , pp. 246-250(5)
Publisher: Entomological Society of America
Abstract:Forty-five weaned Angus steer calves, Bos taurus, were obtained from a ranch at the interface between a large area (southern Alberta, Canada) with a history of several years' treatment with systemic insecticides for cattle grubs, Hypoderma lineatum (Villers) and Hypoderma bovis (L.), and an area where there had been treatment for only 1 yr. Thus, we expected that these animals would receive different levels of cattle grub infestation pressure and have different numbers of encysted larvae. The steers were not exposed to systemic insecticides; they were evaluated for the effects of the cattle grubs on performance. Peak numbers of cattle grubs that appeared in the backs of these animals ranged from 2 to 39. The influence of level of cattle grub infestation on the performance of these steers during the period when the larvae were migrating to and emerging from the animals' backs did not influence the steers' rate of gain, feed intake, or feed-to-gain ratio. The entire growth period from weaning to slaughter was divided and analyzed as three distinct periods: the period before the cattle grubs appeared in the animals' backs, the period when cattle grubs were present in the warbles, and the period following drop-out of cattle grubs. In addition, cattle grub infestation did not influence carcass grade, backfat thickness, marbling score, or rib eye area when steers were slaughtered 13 wk after the last cattle grub had emerged. Results suggest that relatively low numbers of cattle grubs did not produce measurable effects on performance of cattle that were placed on feed as soon as 15 wk before Hypoderma spp. encystment.
Document Type: Research Article
Publication date: February 1, 1988
- 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.
- Editorial Board
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Visit this journal's homepage
- ingentaconnect is not responsible for the content or availability of external websites