Department of Entomology, College of Agriculture, University of Agricultural Sciences, GKVK, Bangalore - 560 065, (India).
*Author for correspondence: Scientist, Plant Protection and Quarantine Section, National Botanical Research Institute, Rana Pratap Marg, Lucknow - 226 001, U.P. (India). E-mail: kc_shekar2001@yahoo.com
Selected pesticides were evaluated for residual toxicity at the recommended dose against spider mite Tetranychus urticae Koch infesting French bean. The LT50 was monocrotophos 0.04% and ethion 0.1% (19 days) > dicofol 0.05% (14 days) > dimethoate 0.06% (13 days) > acephate 0.06% and bifenthrin 0.05% (10 days) > fluvalinate 0.0125% and 0.025% (5–7 days) > endosulfan 0.07% and wettable sulphur 0.2% (>2 days).
