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Control of Cattle Grubs by Pour-On, Injection, and Spray1

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Abstract:

Four organophosphates were tested for efficacy against cattle grubs, Hypoderma lineatum (de Villers) and H. bovis (L.) using three methods of application: high-pressure, full-coverage spray; pour-on; or intramuscular injection. Ruelene® (O-4-tert-butyl-2- chlorophenyl O-methyl methylphosphoramidate) showed grub reductions of 99.6% to 100% when used as a 0.25% spray or as a 10 or 7 gram/calf pour-on. Lesser reductions (90.0% to 96.3%) were noted with Ruelene as a 5 gram/calf pour-on. Co-ral® (O,O- diethyl O-3-chloro-4-methyl-2-oxo-2H-benzopyran-7 -yl-phosphorothioate) was 91.1% effective as a 0.25% spray and 91.8% to 97.8% effective as a pour-on at the 5 gram/calf dosage. Bayer 29493 (O,O-dimethyl O-[4-(methythio)-m-tolyl[ phosphorothioate) reduced grubs 100% as a 0.25% spray, a 2.5 gram/calf pour-on, or as a 7 mg./kg. injection. American Cyanamid 380\23 (Famophos) (O,O-dimethyl, O, p-(dimethylsulfamoyl) phenyl phosphorothioate) showed effectiveness against grubs of 94.8% using a 10 gram/calf pour-on and 99.6% as injections at either 15 or 7 mg./kg. Necessity of differential treatment of calves by the pour-on technique, accounting for dosage on a per unit weight basis, is not indicated. Cholinesterase activity and gains in weight were affected slightly in some of the treatments. Toxicity was encountered ill some of the treatments varying from mild to severe. Alfalfa hay appeared to have contributed to severe bloat in one group of treated calves.

Document Type: Research Article

Publication date: August 1, 1962

More about this publication?
  • 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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