Efficacy of abamectin 1.9 EC against two spotted spider mite, Tetranychus urticae Koch (Acari: tetranychidae) on brinjal

Based on pooled analysis of data of two seasons, two foliar sprays of abamectin @ 125 mL ha⁻¹, at 10 days interval, first at 45 and second at 55 days after transplanting resulted in the lowest mean population of two spotted spider mite Tetranychus urticae Koch (Acari:Tetranychidae) on brinjal (Cv. Local) (1.77 mites cm⁻² leaf area). In comparison, fenpropathrin, spiromesifen and dicofol recorded 7.78, 9.12 and 11.71 mites cm⁻² leaf area, respectively and the untreated check 22.94 mites cm⁻² leaf area. Abamectin application up to 250 mL ha^{1 was moderately safe to the predatory mite, Amblyseius tetranychivorus and coccinellids while other insecticides were toxic. All doses of abamectin from 60 to 250 L ha−1 were equally effective in recording brinjal yield which ranged from 17.37 to 17.83 tonnes ha−1 as against 13.00 tonnes ha−1 in untreated control.}