Efficiency of indigenous and exotic predatory mites to control the two-spotted spider mite on strawberry
2001
Manita Kongchuensin | Usanee Chattrakul | Viman Sripen | Vatana Charanasri
Two-spotted spider mite is the important pest of strawberry. Releases of native predatory mite provided a good control of this mite. The objective of this research is to adopt the two exotic predatory mites, Phytoseiulus perimilis and Amblyseius californicus, to control the two spotted spider mite by comparing their efficiency with the native species, A. longispinosus. Effects of abamectin and the petroleum spray oil were also investigated. Trials were conducted at Inthanon Station, Royal Project Foundation, at Chiang Mai province in 2000. The result showed that 5 releases of A. californicus (10 mites per plant) could keep the two-spotted spider mite population under control better than 5 releases of A. longispinosus and 8 releases of P. persimilis. Spraying of abamection 0.0018 percent could reduce mite population the same as releasing of A. longispinosus and P. persimilis; spraying of petroleum spray oil 0.2 percent every 2 weeks could not suppress mite population. Yields obtained throughout the crop in the treatment controlled by A. californicus was the highest and weighed 1.87 times more than untreated plot.
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