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Toxicities of Selected Synthetic Pyrethroids to Two Species of Phytophagous Mites

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Laboratory experiments using the standard slide dip technique were conducted for selected synthetic pyrethroids and an organophosphorous insecticide to establish dosage-mortality data for the European red mite, Panonychus ulmi (Koch), and the twospotled spider mite, Tetranychus urticae Koch. After treatment, microscope slides containing mites were held under a photoperiod of LD 16:8 at 27°C and 95% relative humidity for 24 h before evaluation for mortality. Resulting mortality data were subjected to Finney's log-probit analysis. All chemicals tested were more toxic to P. ulmi than to T. urticae. The effectiveness of the chemicals against P. ulmi based on LC50 values was fenvalerate > SD 47443 > flucythrinate > SD 41706 > permethrin (Ambush) > permethrin (Pounce) > phosmet. Effectiveness against T. urticae based on LC50 values was fenvalerate > SD 47443 > permethrin (Ambush) > SD 41706 > fenpropathrin > permethrin (Pounce) > flucythrinate > phosmet.

Document Type: Research Article

Publication date: August 1, 1983

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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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