Vol. 11, Special Issue 10 (2022)

Author(s):
Soumya Ashna Singh and Ashwani Kumar

Abstract:
The present study was conducted at the Central Research Field (CRF), Department of Entomology, SHUATS, Prayagraj during Rabi 2021-2022. Seven treatments were evaluated against Lipaphis erysimi, i.e., Control (T0), Verticillium lecanii (2x108 spores/ml) (T1), Beta cyfluthrin 8.49% w/w + Imidacloprid 19.81% w/w (T2), Imidacloprid 17.8 SL + Cypermethrin 25% EC (T3), Neem oil 5% EC (T4), Nisco Bio 5% (T5), Metarhizium Anisopliae 106- 108 spore load/ml 5 g/lit (T6), Imidacloprid 17.8 SL (T7) were evaluated against mustard aphid (Lipaphis erysimi). Result revealed that, among the different treatments, the highest per cent population reduction of mustard aphid was recorded in Imidacloprid 17.8 SL + Cypermethrin 25% EC (75.67%), followed by Beta cyfluthrin 8.49% w/w + Imidacloprid 19.81% w/w (70.123%), Imidacloprid 17.8 SL (64.687%), Neem oil 5% (58.2%), Metarhizium anisopliae (55.2%), Verticillium lecanii (52.497%), Nisco bio 5% (50.017%) was the least effective among all treatments. While, the highest yield 19.47 q/ha was obtained from the treatment Imidacloprid 17.8 SL + Cypermethrin 25% EC as well as B:C ratio (1:7.59) was obtained high from this treatment. It was followed by Beta cyfluthrin 8.49% w/w + Imidacloprid 19.81% w/w (1:6.89), Imidacloprid 17.8 SL (1:6.59), Neem oil 5% (1:5.60), Metarhizium anisopliae (1:4.87), Verticillium lecanii (1:4.77), Nisco bio 5% (1:3.98). as compared to Control (1:3.25).