Comparative effect of insecticides against green leaf hopper (Nephotettix virescens Distant) on rice crop

In order to evaluate the efficacy of Insecticides against rice leaf hopper it was inferred that the application of Malathion (4.70, 4.92, 12.77 and 21.05 hoppers/10 sweeps) was the best in effectiveness gave reduced population after 72 hrs, 7,15 and 30 days of application. The Rocket (6.15, 4.50, 11.95 and 20.20 hoppers/10 sweeps) was also effective against this pest The other treatments like Thlodan (6.21 5.75,14.75, 21.60 hoppers/10 sweeps), Colfos (7.02, 6.45 17.85 and 16.99 hoppers/10 sweeps), Carina (7.75, 5.92, 16.90 and 20.25 hoppers/10 sweeps), Furadan (7.70, 8.75, 6.97 and 14.15 hoppers/10 sweeps), Thimet (8.22, 8.55, 6.30 and 15.97 hoppers/10 sweeps) and Neem oil (2.55, 14.85, 19.02 and 26.75 hoppers/10 sweeps) were less effective but better than control (8.95, 33.85, 36.65 and 39.32 hoppers/10 sweeps). The highest yield of paddy was recorded in case of Colfos (25.99 q/hac) followed by Carbofuran (25.30 q/hac). Neem oil was quite effective in reducing insect pest Incidence and increasing grain yield.