Field Evaluation of Selected Insecticides and Botanical against Mustard Aphid, Lipaphis erysimi (Kalt.) on Mustard, Brassica juncea L.

A field trial was conducted at Central Research Farm [CRF], SHUATS, Naini, Prayagraj during the Rabi season. Six treatments were evaluated against Lipaphis erysimi. i.e. Fipronil 5% SC @ 0.5ml/lit, Difenthurion 50% WP @ 0.20g/lit, Profenophos 50% EC @ 1ml/lit, Thiamethoxam 25% WG @ 0.25g/lit, Imidacloprid 17.8% SL @ 0.5ml/lit and NSKE 5% @ 5ml/lit were evaluated against mustard aphid Lipaphis erysimi. Results revealed that, among the different treatments, the lowest population of mustard aphid was recorded in Imidacloprid 17.8% SL (22.82). Thiamethoxam 25% WG (33.63) was found to be the next best treatment followed by Difenthurion 50% WP (47.18), Fipronil 5% SC (54.15), and Profenophos 50% EC (60.12), whereas NSKE 5% (80.23) was found to be the least effective against this pest. The plot treated with the highest yield Imidacloprid 17.8% SL (24.6 q/ha) followed by Thiamethoxam 25% WG (21.8 q/ha), Difenthurion 50% WP (18.2 q/ha), Fipronil 5% SC (16.4 q/ha), Profenophos 50% EC (14.3 q/ha) and NSKE 5% (13.5 q/ha) as compared to the control plot (9.2 q/ha).Among the treatments, the best and most economical treatment was Imidacloprid 17.8% SL (1:7.24) followed by Thiamethoxam 25% WG (1:6.43), Difenthurion 50% WP (1:5.24), Fipronil 5% SC (1:4.64), Profenophos 50% EC (1:3.94) and NSKE 5% (1:3.90) as compared to control plot (1:2.83).