Selection for Behavioral Resistance in Twospotted Spider Mite (Acari: Tetranychidae) to Flucythrinate

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When populations of the twospotted spider mite, Tetranychus urticae Koch, were selected repeatedly in the laboratory with the pyrethroid flucythrinate, their behavioral responses to exposure to residues changed. Methods were developed to permit approximately equal segregation between treated and untreated primary leaves of French dwarf bean plants, Phaseolus vulgaris L., over a 24-h exposure period. Behavioral selections for increased or decreased irritability to flucythrinate residues continued for 11 selections. To maintain equal segregation, the concentration for selections for decreased irritability was incrementally increased from an initial value of 0.003 g (AI)/liter in selection 4 to reach 0.25 g (AI)/liter at selection 11. Selection for increased irritability was accomplished by decreasing concentrations from the initial 0.003 g (AI)/liter in selections 1 to 8, to 0.0008 g (AI)/liter by selection 11. Slide-dip tests at the recommended field rate (0.05 g [AI]/liter) showed no change in physiological resistance in either behavioral selections.

Document Type: Research Article

Publication date: February 1, 1988

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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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