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Evolution of resistance to the pyrethroid insecticide fenvalerate in the diamondback moth, Plutella xylostella (L.), was simulated by a computer model. Predictions from the model agree with data documenting development of diamondback moth resistance to fenvalerate in Ban-chau, Taiwan, in <4 years. Sensitivity analyses varying fecundity (4-fold), initial R gene frequency (10,000-fold), initial population density (100-fold), and percentage of larvae escaping insecticide exposure (0–20%) resulted in predicted times for resistance development under Ban-chau conditions ranging from <1–4 years. Simulations of 15 management strategies suggest that under tropical conditions, spray frequency must be less than two per cabbage cycle or spray concentration less than the LC75 of susceptible larvae to substantially delay resistance development. Adoption of alternative tactics for management of the diamondback moth is strongly urged.
Document Type: Research Article
Publication date: December 1, 1986
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.