Author(s): K. SEN, A. SAMANTA, A. HANSDA, P. P. DHAR AND A. SAMANTA

Abstract: A field experiment was conducted to evaluate the bioefficacy and economics of certain insecticides against mustard aphid, Lipaphis erysimi (Kalt.) infestation on mustard during rabi season of 2014-15. Among the treatments, imidacloprid 17.8 SL @ 20 g a.i. ha-1, thiamethoxam 25 WG @ 25 g a.i. ha-¹ and diafenthiuron 50 WP @ 50 g a.i. ha-¹ were proved to be effective against mustard aphid. Highest seed yield was obtained with imidacloprid 17.8 SL (17.41 q ha-¹) followed by thiamethoxam 25 WG (16.96 q ha-¹). Thus, imidaclopird 17.8 SL, thiamethoxam 25 WG and diafenthiuron 50 WP may be recommended to control mustard aphid. Additionally, the incremental cost-benefit ratio was found highest in imidacloprid being, 1:14.62 followed by 1:14.35 in thiamethoxam.

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