Both physiological tolerance to the pyrethroid permethrin and behavioral response to permethrin have been shown to have some genetic basis in the diamondback moth, Phitella xylostella (L.). Hence, selection based on these characters should he possible. We investigated the direct and indirect effects of selection on physiological tolerance and behavioral responsiveness, and how these effects vary across populations. Working with four populations for which genetic information was available, we created three groups within each population by selecting for behavioral responsiveness and unresponsiveness, and by separately selecting for physiological tolerance. The effects of selection were evaluated by assaying the offspring of these groups. In all four populations, the dominant effects of selection were on physiological tolerance. Physiological tolerance was higher in those groups selected directly based on tolerance and those selected for behavioral unresponsiveness, than in the groups selected for behavioral responsiveness. In addition, tolerance was higher in the groups selected for tolerance and behavioral unresponsiveness than in the parental generation in all but one population. We observed no clear patterns with respect to the behavioral character. Direct selection for responsiveness was successful in only one population. Selection based on tolerance did not indirectly produce shifts in behavior. At least two elements of behavior, however, were affected by selection: first, genera responsiveness as shown by behavioral variation independent of permethrin: second, an increased tendency to avoid permethrin especially at high toxin concentrations. These effects varied among the populations apparently as a result of variation in genetic parameters.
Document Type: Research Article
Publication date: June 1, 1995
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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.