Toxicity of some pesticides to predatory mite, Amblyseius finlandicus (Oudemans) (Acari: Phytoseiidae) under laboratory conditions

Abstract

An experiment was carried out during September to October 2014-15 and 2015-16 to investigate the effects of toxicity of different pesticides predatory mite, A. finlandicus under laboratory conditions. Toxicity was assessed by calculating percent mortality of eggs, nymphs and adult stages of A. finlandicus resulting 12 h, 24 h, 36 h, 48 h, 60 h and 72 h after treatment. The effects were classified by IOBC classification indicated that propergite 0.067 percent was slightly harmful (>30% mortality) to eggs and adults of A. finlandicus. Spiromesifen at the concentrations 0.0129, 0.0229 and 0.0329 percent were harmless (30% mortality) to all stages of A. finlandicus. Further, difenthiuron at 0.04, 0.05 and 0.06 and fenpyroximate at 0.04, 0.05 and 0.06 percent concentrations were harmless (