Bio-efficacy of Some Insecticides against Hoppers in Rice.

The field experiment was carried out to evaluate the efficacy of different insecticides against hoppers on rice. The result revealed that, pymetrozine 50 WG was the best in reducing the white backed plant hopper (WBPH) and green leaf hopper (GLH) with 2.95 and 2.89 hoppers per hill, respectively, which was followed by clothianidin 50 WDG (3.05 WBPH and 2.99 GLH per hill) and flonicamid 50 WG (3.45 WBPH and 3.33 GLH per hill). The treatments imidacloprid 70 WG (4.47 WBPH and 3.87 GLH per hill) and fipronil 5 SC (5.61 WBPH and 4.44 GLH per hill) were found moderately effective, while bifenthrin 10 EC (6.76 WPBH and 4.92 GLH per hill) and cartap hydrochloride 50 SP (7.07 WBPH and 5.45 GLH per hill) were found to be the least effective in managing the WBPH and GLH. In case of natural enemies' population, no detrimental impact of insecticides was observed on the population of spiders as the treatment differences were non-significant. Amongst the seven insecticides evaluated, pymetrozine 50 WG treated plots recorded the highest grain and straw yield. [ABSTRACT FROM AUTHOR]