Twospotted Spider Mites: Control on Strawberry with Organotin, Naphthoquinone, and Cyclopropane Acaricides

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Efficacy of selected compounds from recently developed groups of acaricides was evaluated in 3 winter field experiments for control of Tetranychus urticae Koch on strawberry, The naphthoquinone, DPX-3792 (2-acetyloxy)-3-dodecyl-1,4-naphthalenedione), and the organotin compounds, cyhexatin, hexakis, and R-28627 (S-tricyclohexyltin O,O-diisopropyl phosphorodithioate), effectively reduced mites and their eggs below levels that developed on strawberry foliage treated with water alone. Fruit yields from plants treated with these compounds were as high or higher than were yields from plants to which no acaricides were applied. The cyclopropane compound, ZR-856 (hexadecyl cyclopropanecarboxylate), was effective against T. urticae but reduced yields in 1 experiment. The carbamates, benomyl and oxamyl, were not as effective in reducing mite populations as the aforementioned chemicals but did significantly reduce populations relative to those on plants sprayed with water only.

Document Type: Research Article

Publication date: June 1, 1979

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