Abstract
The comparative aspects of toxicity of phosphororganic and pyrethroid insecticides and their combinations for arthropods and warm‐blooded organisms were studied. The quantitative comparison of the coefficients of the selectivity, specific sensitivity and combined action were worked out. The most perspective mixtures were determined and the optimum ratios of their ingredients were stated. Foxim, Fluvalinat, Deltamethrin and mixture of Fluvalinat with Chlorpyriphos in ratios of 1:10 and 1:15 ‐ had more selective features for the Colorado potato beetle (Leptinotarsa decemlineata Say), the spider mite (Tetranychus urticae Koch), the spring cereal aphid (Schizaphis graminum Rond).
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