Authors: HEAD, GRAHAM; HOY, CASEY W.; HALL, FRANKLIN R.

Source: Journal of Economic Entomology, Volume 88, Number 3, June 1995 , pp. 447-453(7)

Publisher: Entomological Society of America

Abstract:

Insects may survive insecticide applications by physiological mechanisms that permit tolerance of an acquired dose or behavioral mechanisms that reduce the dose acquired. We investigated the genetic basis of physiological and behavioral responses to the pyrethroid permethrin within four diamondback moth, Plutella xylostella (L.), populations with different average levels of tolerance. Using a half-sib design, variance components and heritabilities of the two characters and the genetic correlation between them were calculated for each population. In all four populations, additive genetic variances and heritabilities for physiological tolerance to permethlin were highly significant. In contrast, heritabilities for behavioral avoidance of permethrin were low and significant in only one population, although additive genetic variances were similar to those for tolerance. The phenotypic and genetic correlations between these two characters varied among the populations from essentially zero to strongly significant. All correlations were negative in form, with behaviorally responsive families tending to be less physiologically tolerant and unresponsive families tending to be more physiologically tolerant. The magnitude of the correlation was related to the amount of additive variation in the population; significant correlations between physiological tolerance and behavioral avoidance occurred in populations with relatively high levels of additive variation for both characters. Implications for the evolution of insecticide resistance and applications for resistance management are discussed, as are parallels with oviposition preference-larval performance studies.

Document Type: Research article

Publication date: 1995-06-01

More about this publication?

• 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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