Intake and Efficacy of Methoprene and Stirofos Mineral Blocks for Control of Horn Flies (Diptera: Muscidae) on Pastured Beef Cattle
Authors: MOON, ROGER D.; NOETZEL, DAVE M.; JOHNSTON, LEE J.
Source: Journal of Economic Entomology, Volume 86, Number 6, December 1993 , pp. 1738-1745(8)
Publisher: Entomological Society of America
Abstract:Pastured herds of Shorthorn beef cattle, Bos taurus L., in western Minnesota were treated with different insecticidal mineral blocks during the summers of 1990 and 1991. Treatments were noninsecticidal blocks (MoorMan's 646-B Special Range Mineral Block A), 0.02% methoprene blocks (MoorMan's 650-B), and 0.5% stirofos blocks (Sweetlix). Mineral intake was monitored once or twice per wk. To evaluate efficacy, identified animals from the three herds were commingled for 18 h in one pasture to allow naturally occurring horn flies, Haematobia irritans irritans (L.), to oviposit in the animals' dung pats. Just before adults emerged, horn fly puparia were extracted to assess the effects of the insecticidal minerals on the developing flies. Intake of all three blocks varied substantially among weeks but most often exceeded prescribed rates. Methoprene blocks consistently increased pupal mortality, but offsetting increases in pupal densities negated effectiveness. Stirofos blocks did not increase larval mortality. Neither insecticidal block effectively prevented within-pasture production of horn flies under field conditions.
Document Type: Research article
Publication date: 1993-12-01
- 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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