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The Effect of Tedion on the Eggs and Larvae of Three Strains of the Two-Spotted Spider Mite, Tetranychus telarius1

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Tedion® (2,4,4',5-tetrachlorodiphenyl sulfone) had little or no contact effect on eggs of different ages from two-spotted spider mites, Tetranychus telarius (L.). However, a high percentage of hatching larvae were killed. Tedion-treated females produced a high percentage of nonviable eggs the first 24 hours with a marked decrease thereafter. The number of nonviable eggs produced by untreated females after feeding on Tedion residues increased with the length of feeding time. A strain of spider mites previously exposed to Tedion under greenhouse conditions was resistant to these effects.

Document Type: Research Article

Publication date: February 1, 1961

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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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