Genetic Variability in Tetranychus urticae (Acari: Tetranychidae) from Greece: Insecticide Resistance and Isozrmes

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Abstract:

Resistance to methyl-parathion. methidathion, and methomyl was studied by bioassays in Tetranychus urticae Koch from Greece. At LC50, the resistance ratio was highly variable with methidathion (5- to 63-fold) and with methomyl (6- to 34-fold). The mortality curves with methyl-parathion showed a clear plateau at ≍20% mortality. and the resistance ratio was ≍50 fold at LC50 in all samples. By using isoelectric focusing on cellulose acetate membranes, electrophoretic studies of 5 loci encoding esterases (Est-l and Est-2), glucose-phosphate isomerase (Gpi), malic enzyme (Me), and phosphoglucomutase (Pgm) disclosed large genetic differences among the samples.

Document Type: Research Article

Publication date: December 1, 1996

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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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