International Journal of Entomology Research

Authors
Dr. PD Ghoghari, RL Chavadhari, Dr. VA Patil, NK Kavad

Abstract
An experiment was conducted during kharif 2014-15 to 2016-17 at Main Rice Research Centre, Navsari Agricultural University, Navsari to test the efficacy of some insecticides against rice stem borer, Scirpophaga spp. Among all the insecticides tested, treatment of flubendiamide 20 WG 0.005 @ 2.5 gm /10 litres was found most effective in controlling rice stem borer, S. spp. The next best treatment was chlorantraniliprole 18.5 SC 0.006 @ 3 ml/10 litres and thiacloprid 21.7 SC 0.02 @ 10 ml/10 litres in terms of reduction of stem borer population. The highest grain yield of rice (6146 kg/ha) was recorded in the treatment flubendiamide 20 WG 0.005 @ 2.5 gm/10 litres which were followed by chlorantraniliprole 18.5 SC 0.006 @ 3 ml/10 litres (5919 kg/ha), thiacloprid 21.7 SC 0.02 @ 10 ml/10 litre (5784 kg/ha) and lambda cyhalothrin 2.5 EC 0.0025 @ 10 ml/10 litre (5662 kg/ha). As far as straw yield, treatment of flubendiamide 20 WG 0.005 @ 2.5 gm/10 litre was found the highest straw yield (7151 kg/ha) and it was followed by the treatment of chlorantraniliprole 18.5 SC 0.006 @ 3 ml/10 litre (6899 kg/ha), thiacloprid 21.7 SC 0.02 @ 10 ml/10 litre (6777 kg/ha) and lambda cyhalothrin 2.5 EC 0.0025 @ 10 ml/10 litre (6556 kg/ha). In terms of ICBR the treatment flubendiamide 20 WG 0.005 @ 2.5 gm/10 litres was found most superior over the rest of the treatments.