A strain of the predatory mite Amblyseius longispinosus (Evans) resistant to permethrin, developing in the tea plantation of Shizuoka Prefecture (Acarina: Phytoseiidae).

Abstract

Susceptibility of the predatory mite, Amblyseius longispinosus (EVANS) to permethrin (20%, W.P.) was investigated by the leaf disk spray method. Among the eleven strains, LC50 value of Hiranuma (1), Ide (1), and Minamihara strain were 301.9ppm, 66.5ppm and 8.8ppm, respectively.