Evaluation of insecticides against mustard aphid, Lipaphis erysimi (Kaltenbach)

Abstract

Field experiments were conducted to evaluate the efficacy of various insecticides against mustard aphid, Lipaphis erysimi on mustard crop during rabi seasons 2020-21 and 2021-22. The results on the field efficacy revealed that performance-wise treatments were in the order of imidacloprid 17.8 SL > thiamethoxam 25%WG> acetamiprid 20%SP > dimethoate 30%EC > malathion 50%EC > fipronil 5%EC > profenofos 50%EC > buprofezin 25%EC. The least population (5.40/plant) of aphid was obtained with application of imidacloprid 17.8% SL at 7 DAS and (6.67/plant) at 10 DAS during 2020-21 and 2021-22, respectively. The same trend was observed till 28th day in comparison to rest of the treatments and untreated control. Significant reduction in population was observed with imidacloprid 17.8 SL @ 27.0 gm a.i./ha followed by thiamethoxam 25%WG @ 25 gm a.i./ha and dimethoate 30%EC @ 200 gm a.i./ha. Imidacloprid and thiamethoxam were significantly superior to other treatments. The maximum yield was obtained with imidacloprid (17.99 and 18.22 q/ha) followed by thiamethoxam (16.62 and 17.37q/ha) during 2020-21 and 2021-22, respectively.