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Control of Boophilus Ticks on Cattle with a Flowable Formulation of Coumaphos

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Abstract:

A flowable formulation of coumaphos (BAY Vb 9328 Flowable) was evaluated as a control acaricide against Boophilus ticks. At 0.06%, the compound reduced the index of reproduction (IR) by >99.9% against the southern cattle tick, B. microplus (Canestrini), and provided 95.9% reduction of the IR against the cattle tick, B. annulatus (Say). At 0.12%, BAY Vb 9328 Flowable was >99.9 and 100% effective against B. microplus and B. annulatus, respectively. Samples of vat suspension obtained from the top, middle, and bottom of the unagitated vat suspension at various intervals after animals were treated indicated no significant settling of coumaphos particles for 7 days postdipping as compared with samples obtained immediately after animals were treated. At 14 and 21 days posttreatment, the mean concentration of coumaphos was 0.02 and 0.01 %, respectively, indicating that coumaphos particles had settled to the bottom of the vat.

Document Type: Research Article

Publication date: April 1, 1982

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  • 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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