Effects of Some Pesticides on the Predatory Mite, Neoseiulus longispinosus (Evans) (Gamasina: Phytoseiidae)

Abstract

To obtain selective pesticides that are harmless to the predatory mite, Neoseiulus longispinosus, native to Thailand, we tested the toxicity of 29 pesticides on the predatory mite by the leaf-dip method. All pesticides were examined at the concentrations used in the fields of Thailand. The results immediately after dipping the leaf in pesticide showed that fenbutatin oxide, buprofezin, fenobucarb, imidacloprid, dinotefuran, validamycin, carbendazim and sulfur were selective pesticides, harmless to adult females, eggs and immatures of N. longispinosus. These chemicals are expected to be promising pesticides on IPM crops in Thailand, where N. longispinosus is the major natural enemy of spider mites.