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Phoxim as an Insect Protectant for Stored Grains1

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Phoxim was tested on hard winter wheat, shelled corn, and sorghum grain as a protectant against adult rice weevils, Sitophilus oryzae (L.); red flour beetles, Tribolium castaneum (Herbst); confused flour beetles, T. confusum Jacquelin duVal; and lesser grain borers, Rhyzopertha Dominica (F.). Evaluations of results were made at intervals by determination of mortalities after aging of the deposits, by counting the number of progeny developing after toxicity test exposures, and by an assessment of progeny damage to the treated grain.

Phoxim applied at a rate of 5 ppm was superior to the standard dosage of 10 ppm malathion in all tests. Protection against rice weevil damage was excellent throughout the 12-month storage. A lessening of toxicity effectiveness against the flour beetles and lesser grain borers was noted after 9 months' storage, and little progeny damage was inflicted.

Definite levels of phoxim residue were evident with the 3 dosages applied. Variations were found, but the recoveries seem representative for 3 scalar rates of application.

Document Type: Research Article

Publication date: December 1, 1971

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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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