Bio-efficacy and economics of insecticides for management of Helicoverpa armigera Hübner in Chick pea

The minimum larval incidence of H. armigera of 0.95 and 0.36 larva/m row length was recorded in rynaxypyr 20 SC at 3 and 7 days after spraying, respectively followed by flubendiamide 48 SC (1.47 & 0.78 larvae/m row length) and emamectin benzoate 5 SG (1.55 & 0.89 larvae/m row length) as against convention insecticide profenophos 50 EC which recorded 2.09 and 1.49 larva/m row length. The treatment with rynaxypyr 20 SC was found significantly effective in reducing the pod damage (3.5%) followed by flubendiamide 48 SC (4.8%) and emamectin benzoate 5 SG (6.05%) as compared to profenophos (13.9%). The highest (2590 kg/ha) grain yield was recorded in rynaxypyr 20 SC followed by flubendiamide 48 SC (2365 kg/ha) and emamectin benzoate 5 SG (2292 kg/ha). However, the highest (1:19.22) ICBR (Incremental cost benefit ratio) was recorded in flubendiamide 48 SC followed by rynaxypyr 20 SC (1:11.1), profenophos 50 EC (1:7.8), emamectin benzoate 5 SG (1: 4.2) and lufenuron 5.4 EC (1:3.5).