Pesticide Research Journal

Efficacy of chlorantraniliprole (Coragen 20 SC), a new insecticide of anthranilic diamide class was evaluated @ 10, 20, 30 and 40 g ai ha⁻¹ and compared with thiocyclam hydrogen oxalate (Evisect 50 SP), an insecticide of neristoxin group @ 400 g ai ha⁻¹ and the check insecticide, chlorpyriphos (500 g ai ha⁻¹) under irrigated conditions in Punjab against stemborers and leaffolder infesting rice during kharif 2009 and 2010. Chlorantraniliprole @ 40 g ai ha⁻¹ provided an effective control of stemborers (1.62% dead hearts and 2.00% white-ears) statistically at par with thiocyclam hydrogen oxalate (1.71% dead hearts and 2.07% white-ears) and chlorpyriphos (1.61% dead hearts and 2.00% per cent white-ears) but, significantly better than its lower dosages of 10 and 20 g ai ha⁻¹ and the untreated control. Per cent damaged leaves (3.40%) in chlorantraniliprole applied @ 40 g ai ha⁻¹ was statistically at par with the check insecticide, chlorpyriphos (3.27%). Paddy yield in treated plots ranged from 33.0–36.1 q ha⁻¹ which was significantly higher than the control (30.87 q ha⁻¹), except for the lowest dose of the chlorantraniliprole (32.03 q ha⁻¹) which was at par with the control.