Efficacy of abamectin 1.9 EC against two spotted spider mite, Tetranychus urticae Koch (Acari: tetranychidae) on brinjal
2017
Suresh, K. | Baskaran, RK Murali | Rani, B Usha | Parthiban, P
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 ha¹ 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.
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