Acephateとfenpropathrinとの混用によるミカンハダニ防除効果

概要

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A mixture of acephate and fenpropathrin showed high synergism for acaricidal activity against female adults, larvae and mature eggs of the citrus red mite, Panonychus citri. No synergistic activity was observed between fenpropathrin and three organophosphorus insecticides : fenitrothion, dimethoate and isoxathion. Synergistic activity was also observed for a mixture of acephate and flucythrinate or fluvalinate. The synergy of acephate and flucythrinate was higher than that of acephate and fenpropathrin. However the acaricidal activity of a mixture of acephate and fenpropathrin was the highest among the three mixtures. The mixture of acephate and fenpropathrin prolonged the residual activity against female adults in comparison to just fenpropathrin. The persistence depended on the dosage of acephate in the mixture. The population density of citrus red mites in a mandarin- orange orchard was well controlled by the mixture of acephate and fenpropathrin compared to just fenpropathrin. The optimum mixture concentration was 167-333 ppm of acephate and 50 ppm of fenpropathrin.
1992-02-25