Tobacco Budworms: Response to Gossypol and Selection in a Field-collected Strain Under Laboratory Conditions

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A cuture of Heliothis virescens (F.), collected from cotton as larvae, was maintained on diet medium containing concentrations of gossypol for 13 generations and selected for a tolerance when compared to a control culture. By selecting only larvae that weighed at least 60% of the average weight of control-culture larvae, we observed a significant increase in tolerance to gossypol. In generation 13, the concentration necessary for 95% weight reduction was significantly greater than in generations of the selected and control cultures previously tested. The gossypol treatment affected larval weights, pupal weights, percentage of pupation, and time to pupation of the selected culture compared to the control culture; however, the major effects were observed within the first generations. Fertility of females from the selected culture in generation 13 reared on 0.21% gossypol was reduced 38% compared to females from the control culture.

Document Type: Research Article

Publication date: February 1, 1985

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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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