Baseline Susceptibility of Tetranychus truncatus (Prostigmata: Tetranychidae) to acaricides

Tetranychus truncatus Ehara (Tetranychidae), a globally distributed phytophagous mite, infests various plants, including many economically important crops. In Kerala, it has been identified as a major pest on vegetable crops. Continuous monitoring of the field populations for susceptibility to various acaricides is needed to understand the status of resistance in them. Studies were conducted to assess the baseline susceptibility of Tetranychus truncatus (Prostigmata: Tetranychidae) to acaricides. The present study generated baseline data for T. truncatus to acaricides viz., spiromesifen (1.2 ppm), fenazaquin (2.9 ppm), diafenthiuron (1.6 ppm), fenpyroximate (2.6 ppm) chlorfenapyr (1.0 ppm), propargite (2.3 ppm) and hexythiazox (36.1 ppm).