Relative efficacy of newer insecticides and biopesticides against Helicoverpa armigera (hub.) in chickpea
K Dinesh, R Bharu Singh, K Kavita and Choudhary RS
A field study was conducted at instructional farm, Rajasthan College of Agriculture, MPUAT, Udaipur during Rabi 2013-14 and 2014-15 to evaluate the efficacy of insecticides and biopesticides against gram pod borer (Helicoverpaarmigera H.) on chickpea (Cicer arietinum L.) variety GNG 1581. T1 (Flubendiamide 480 SC @ 200 ml/ha) was most effective, which caused (70.31, 73.08 and 72.04) and (72.86, 75.97 and 72.84) highest mean percent reduction in population of gram pod borer larvae. It was followed by Indoxacarb 14.5 SC @ 500 ml/ha. The biopesticide treatment of T6 (HaNPV 200 LE @ 250 ml/ha) and T7 (Bt.k 8 L @ 1lit/ha) were least effective against gram pod borer. The highest seed yield of 22.78 and 24.53 q ha-1 was obtained from T1 (Flubendiamide 480 SC @200 ml/ha) and minimum yield 16.00 and 15.20 q ha-1 was recorded in T9 (HaNPV- Bt.K- Bt.K @ 250LE-1Lit-1Lit/ha), during rabi 2013-14 and 2014-15. The highest benefit: cost ratio of 1.26 and 1.42 was recorded in T1 (Flubendiamide 480 SC @200 ml/ha) and minimum benefit cost ratio 1.03 and 1.04 was recorded in T9 (HaNPV- Bt.K- Bt.K @ 250LE-1Lit-1Lit/ha, during rabi 2013-14 and 2014-15.