Eco-friendly management of aphid (Lipaphis erysimi Kalt) in Indian mustard variety RB-50 under late sown conditions

Field experiment on efficacy of eight insecticides was conducted at RRS, Bawal, Rewari (Haryana) against mustard aphid, Lipaphis erysimi on Indian mustard variety RB-50 during Rabi, 2017-18, 2018-19 and 2019-20. The spray of treatment T8: Diamethoate 30EC @ 625 ml/ha was proved most effective treatment with pooled mean aphid population of 4.36, 3.85 and 2.83 aphids/10 cm on main apical shoot as against 29.43, 37.37 and 44.77 aphids/10 cm on main apical shoot in the T9: control after 3, 7 and 10 days of spray, respectively. Succeeding treatments, T6: Neem oil @ 5% after clipping of infested twigs,T4: Beauveria bassiana @ 108 cs/ml after clipping of infested twigs,T5:NSKE @ 5% after clipping of infested twigs,T2: Beauveria bassiana @ 108 cs/ml, T3: Neem oil @ 5%, T1: NSKE @ 5% and T7: clipping of infested twigs at ETL with pooled mean aphid population of 5.95, 6.32, 7.28, 7.87, 8.43, 8.87 and 32.92 aphids/10 cm of main apical shoot after 10 days of spray, respectively. The maximum seed yield was found in treatment T8: Diamethoate 30 EC @ 625 ml/ha (16.80 q/ha) followed by T6: Neem oil @ 5% after clipping of infested twigs (15.45 q/ha) in comparison to T9: control (8.31 q/ha). Thus, spray of treatment Diamethoate 30 EC @625 ml/ha can be suggested for the management of mustard aphid.