Bio-efficacy of some insecticides against H. armigera (Hubner) on chickpea (Cicer arietinum L.)
2012
Singh, P.S. | Shukla, R.K. | Yadav, N.K.
Chickpea‘SAKI9516’ was sown on Agricultural Research Farm of Banaras Hindu University during Rabi season 2010–11 and 2011–12 for the bio-efficacy of certain new molecules insecticides viz., HaNPV@250 LE/ha, spinosad 45SC@ 100 g a.i./ha, fenvalerate 20 EC @ 300 g a.i./ha, quinalphos 25EC @ 450 g a.i./ha, emamectin benzoate 5SG @ 11 g a.i./ha, azadirachtin 1500 ppm@5ml/lit, cartap hydrochloride 50 SP @ 500 g a.i./ha, fiproni 15 SC @ 50 g a.i./ha and indoxacarb 14.5 EC @ 75 g were applied twice at 15 days interval against gram pod borer, H. armigera. Spinosad was found best among all the treatments with 81.2% reduction in larval population over control followed by indoxacarb, fipronil, emamectin benzoate, cartap hydrochloride, fenvalerate, and quinalphos, azadirachtin and HaNPV. After 7 days of spraying of second application, spinosad was found best again in reduceding 79.8% larval population followed by indoxacarb (with 78.3% reduction in larval populations). The highest yield was obtained in spinosad (1.79 t/ha) while low in azadirachtin (1.06 t/ha). The cost:benefit ratio was high in treatment fipronil (1: 8.2) while low in treatment indoxacarb (1: 5.3).
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