author(s)
Praveen Kumar, SP Yadav, Sunita Yadav and Puneet

abstract
Bio-efficacy of six insecticides (Imidacloprid 17.8 SL @ 40ml/acre, Thiamethoxam 25 WG @ 40 g/acre, Nimbecidine 1500 ppm @ 1.00 l/acre, Nimbecidine 300 ppm @ 1.00 l/acre, Neem oil 5% and NSKE 5%) was evaluated against untreated control. Thiamethoxam 25 WG @ 40g/acre exhibited maximum reduction in cotton leafhopper population followed by imidacloprid 17.8 SL @ 40ml/acre. NSKE 5% reduced minimum population. The maximum net profit (Rs. 10442 per ha) was recorded in thiamethoxam 25 WG treatment followed by imidacloprid 17.8 SL (Rs. 9210 per ha). The highest incremental cost benefit ratio (ICBC) was also obtained in the thiamethoxam (12.00) treatment followed by imidacloprid (8.00).