Vol. 11, Special Issue 8 (2022)

Author(s):
Pankaj Kumar Rajpoot, Jitendra Kumar, Rishabh Mishra, Arun Kumar and Pawan Kumar

Abstract:
The investigation entitled, The effectiveness of various bio pesticides and insecticides against the aphid, Rhopalosiphum maidis Fitch on barley (Hordeum vulgare Linn.)’ was conducted at the Crop Research Farm, Nawabganj, C.S. Azad University of Agriculture and Technology, Kanpur during Rabi season 2019-20. The bio efficacy of the treatments evaluated against aphid on barley crop showed that lowest population of application of acetamiprid 20 SP (3.72 aphids/shoot) was found significantly superior in reducing the aphid population in comparison to other bio pesticide and insecticide except flubendiamide 480 SC and imidacloprid 17.8 SL also gave similar effect of acetamiprid 20 SP statistically. The application of Azadirachtin was found to be least effective having (31.67 aphids/shoot). All treatments were found to be statistically superior in comparison to be untreated check (78.45 aphids/shoot). The percentage reduction in population over untreated check in various treatments varies from 45.05 to 82.21 percent, the lowest in Azadirachtin and highest in acetamiprid 20 SP.