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Pesticide Resistance in Tribolium castaneum and T. confusum (Coleoptera: Tenebrionidae) from Flour Mills in the United States

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Field strains of confused flour beetle, Tribolium confusum Jacquelin du Val, and red flour beetle, Tribolium castaneum (Herbst), were collected from flour mills throughout the United States and tested with discriminating doses to determine their resistance to pesticides. Of 17 strains of T. confusum, 82%were resistant to malathion, 53%were resistant to chlorpyrifos-methyl, 24% were resistant to dichlorvos, 18% were resistant to phosphine, and none was resistant to synergized pyrethrins or resmethrin. Of 28 strains of T. castaneum. 93% were resistant to malathion, 64% were resistant to dichlorvos, 46% were resistant to phosphine, 36% were resistant to chlorpyrifos-methyl, and none was resistant to synergized pyrethrins or resmethrin. Generally, T. castaneum was more resistant than T. confusum. The frequency of this gene for malathion resistance in T. castaneum was sufficiently high to contribute to control failures in the field.

Document Type: Research Article

Publication date: June 1, 1991

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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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