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Selection of larvae of Heliothis virescens (F.) with permethrin at the LD90 level produced resistance. After 11 generations of continuous selection pressure, the LD50 in the F12 generation increased 37-fold compared to the LD50 of the F1. Cross-resistance to cypermethrin in this strain was high. In the F12 generation, LD50 and LD95 values were 7.9- and 50-fold greater, respectively, than LD50 and LD95 values of a strain collected in the field in 1981.
Document Type: Research Article
Publication date: December 1, 1984
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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.