author(s)
D Sudha Rani, S Pradeep Kumar, MN Venkatesh, CH Naga Satya Sri and K Anand Kumar

abstract
The present investigation was carried out to explore the bio efficacy of Insecticides against Gram pod borer, Helicoverpa armigera in redgram during Kharif, 2016 and 2017 at Agricultural Research Station, Garikapadu. Seven treatments including untreated control were evaluated for their relative efficacy towards suppression of larval population and reduction of percent pod damage. The insecticides viz., Emamectin benzoate 5SG, Flubendamide 20WG, Chlorantraniliprole 20 SC, Thiodicarb 75% WP, Indoxacarb 14.5 SC, Novaluron 10 EC were applied three times during the crop season viz., 50% flowering, pod initiation and 50% pod formation stage. Among all the insecticides, larval population of H.armigera infesting redgram was proven to be significantly lower in plots treated with chlorantraniliprole 20 SC (0.62 larvae/plant) and flubendamide 20 WG (1.04 larvae/plant) exhibiting 76.36 and 69.09 percent reduction over control respectively. Similar trend was also observed with respect to percent reduction of pod damage over control, where chlorantraniliprole 20 SC and flubendamide 20 WG exhibited 63.65 and 59.57 percent control respectively. Yield increase over control was recorded to be higher in plots treated with chlorantraniliprole 20 SC (60.78%) and flubendamide 20 WG (54.93%). The other treatments in order of yield efficacy were indoxacarb 14.5 SC (46.73%) > emamectin benzoate 5SG (43.68%)> thiodicarb 75% WP (42.45%)> novaluron 10 EC (27.37%).