Stability of Fenvalerate Resistance in the Leaf miner Parasitic Di glyphs begin (H)'lnenoptera: Eulophidae)

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We studied the stability of field-selected resistance to fenvalerate in Diglyphus begini (Ashamed), a major parasitic of Liriomyza Sp. Leaf miners. After up to 10 mo of laboratory rearing without exposure to insecticide, the LC50 to fenvalerate declined significantly in females, but not in males. Adults of both sexes from resistant colonies remained significantly less susceptible than adults from susceptible colonies and showed low mortality at concentrations equivalent to field-recommended application rates of fenvalerate. Comparison with previously reported data suggests that resistance in D. begini is not less stable than resistance in the leaf miner liriomyza trifolii (Burgess). The persistence of resistance in D. begini may be especially valuable in integrated pest management programs that use pyre thyroids intermittently.

Document Type: Research Article

Publication date: April 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.
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