author(s)
Sunil Kumar Ghosh

abstract
Chilli (Capsicum annuam L.) is an important spice crop as well as vegetable crop infested by different insect pests of which jassid (Amrasca bigutula bigutula.) and aphid (Aphis gossypii cause substantial damage to chilli plant. Highest reduction of jassid population was noticed from the treatments Imidacloprid 17.8% SL @ 50 a.i. g/ha. No statistical variation was observed on percent reduction of jassid at 1, 3, 7 and 14 days after spray for both the treatments of Imidacloprid 17.8% SL @ 50 a.i. g/ha and 37.5 a.i. g/ha and recorded maximum reduction of 83.70% and 82.21% respectively at 3 days after spray. Maximum reduction of aphid (88.89%) was recorded from Imidacloprid 17.8% SL @ 50 g a.i./ha which was statistically at par with Imidacloprid 17.8% SL @ 37.5 g a.i./ha (85.34%) at 3 day after spray. Maximum number of predator population was observed in the treatment imidacloprid @ 25 a.i. g/ha (1.63 per plant) as well as untreated plot (2.03 per plant). Imidacloprid 17.8% SL was found effective to control jassid and aphid on chilli crop with no phytotoxicity and no adverse effect on natural enemies.