Field efficacy of cartap hydrochloride (Mortar 75 SG) against stem borers and leaf folder on rice/basmati rice

Cartap hydrochloride (Mortar 75 SG) was evaluated @ 375, 425 and 500 g/ha for the control of stem borers and leaf folder under irrigated field conditions on rice during 2010 and basmati rice during 2011 and 2012 cropping seasons along with chlorpyriphos 20 EC @ 2500 ml/ha as standard check and untreated control. Mortar 75SG @ 425 and 500 g/ha provided effective control of stem borers (dead hearts and white ears) as well as leaffolder infesting rice/basmati rice and was statistically at par with chlorpyriphos 20 EC but significantly better than untreated control. The cost benefit ratio was highest in Mortar 75SG @ 425 g/ha followed by its higher dose @ 500 g/ha, chlorpyriphos 20 EC and Mortar 75SG @ 375 g/ha. Keeping in view the highest cost benefit ratio, Mortar 75SG @ 425 g/ha is recommended for management of stem borers and leaf folder on rice/basmati rice.