Efficacy of Some Bio-pesticides against Mustard Aphid Lipaphis erysimi (Kalt) in Mustard (Brassica juncea)

Management of Mustard aphid Lipaphis erysimi (kaltbach) using Bio-pesticides in field condition was carried out during Rabi 2022-23 at central Research field SHUATS Prayagraj,UP, India. The management of Mustard aphid was done using 8 different treatments and benefit cost ratios were calculated. One spray is applied to protect the crop from mustard aphid (Lipaphis erysimi) using randomized block design with three replications. The observations of mustard aphid (Lipaphis erysimi) 24 hours before (Pre-treatment) and 3rd, 7th and 14th day after spraying (post-treatment) were recorded for computing the per cent of pest reduction. The treatment Spinosad 45%SC (T6) (86.75%) shows highest per cent reduction and the most effective treatment followed by Imidacloprid 17.8%SL (T7) (76.97%), Nisco sixer plus 45 SC (T1) (61.83 %), Verticillium lecanii (2×108 Spore/ml) (T2) (51.04%), Beauveria bassiana (2CFU×108 ml) (T4) (47.60%), Metarhizium anisopliae (2×108 CFU/gm) (T3) (42.01%), Least percentage reduction was obtained with Neem oil 5% EC (T5) (33.42%). While Spinosad 45%SC (T6) shows higher cost benefit ratio with (1:7.96), followed by Imidacloprid 17.8%SL (T7) (1:7.83), Nisco sixer plus (1:6.57), Metarhizium anisopliae (2×108 CFU/gm) (T3) (1:5.79), Beauveria bassiana (2CFU×108 ml) (T4) (1:5.64), Verticillium lecanii (2×108 Spore/ml) (T2) (1:5.63) and Neem oil 5% EC (T5) (1:5.03).