Optimum release times for biological control of the two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) by Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseidae) on the strawberry in greenhouses
2006
Kim, Y.H. (National Institute of Agricultural Science and Technology, RDA, Suwon, Republic of Korea), E-mail: yongh@rda.go.kr | Park, S.G. (Nonsan Agricultural Technology Center, Nonsan, Republic of Korea)
The effectiveness of the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseidae) in controlling the two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) was evaluated in commercial strawberry greenhouses in two areas of Korea. Optimum release times for P. persimilis were investigated by case studies. Control effects of the two-spotted spider mite by release of the predatory mite were shown. There was mostly good control by the release of P. persimilis when there were fewer than 0.9 T. urticae per leaf.
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