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Obliquebanded leafroller, Choristoneura rosaceana(Harris), larvae from a commercial apple orchard in western New York State were 36.8-fold,2.5-fold, and 5.2-fold more tolerant to azinphosmethyl, chlorpyrifos, and esfenvalerate, respectively, when compared with larvae collected from untreated habitats. However, this relationship was not the same for male and female moths from the same locations treated with the same insecticides. Female moths were more tolerant to all insecticides than were males. Field applications of azinphosmethyl and chlorpyrifos did not reduce fruit damage at harvest compared with the untreated control. However, only 3% fruit damage occurred in plots treated with esfenvalerate. These results suggest that larvae in the commercial apple orchards in western New York are resistant to azinphosmethyl and chlorpyrifos. Despite the 5.2-fold resistance level recorded for esfenvalerate, field applications of this insecticide still provide commercially acceptable control.
Document Type: Research Article
Publication date: December 1, 1997
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.