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In experiments conducted against eggs and motile forms of Tetranychus urticae Koch and T. cinnabarinus (Boisduval), clofentezine [3,6-bis(2-chlorophenyl)-1,2,4,5-tetrazine] demonstrated selective toxicity against eggs. Contact mortality against motile forms was poor (<35%), but clofentezine was highly effective when used in combination with dicofol and diazinon. A treatment/temperature/time effect was obtained for both species, with clofentezine being less effective at 22°C than at 16°C. Tests for transovarial transmission showed no significant effect. Effective egg mortality from residual activity was variable for T. urticae, and relatively consistent for T. cinnabarinus. over a period of 22 days. Two wettable powders and one soluble concentrate formulations with different particle sizes were evaluated.
Document Type: Research Article
Publication date: April 1, 1986
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.