author(s)
Deepak Singh Pal, DK Singh, Arun Kumar and Shinde Pravin Gautam

abstract
Study on effect of Bio rational approaches for management of mustard aphid, (Lipaphis erysimi Kalt.) on seed yield and its economics was conducted on the Oilseed Farm Kalyanpur, Kanpur during rabi,2018-19. The treatments were : T₁ : Azadirachtin@ 5ml/L followed by its second spray after 15 days, T₂ : Azadirachtin followed by Beauveria bassiana@2g/L after 15 days, T₃ : Beauveria bassiana followed by its second spray after 15 days, T₄ : Azadirachtin followed by Verticillium leccani@2g/L after 15 days, T₅ : Verticillium leccani followed by its second spray after 15 days , T₆ : Dimethoate 30EC@ 1ml/L followed by its second spray after 15 days and T₇ : Control. Out of which Dimethoate 30EC@ 1ml/L followed by its second spray after 15 days provided highest seed yield which was higher than Azadirachtin followed by Verticillium leccani after 15 days. Dimethoate followed by its second spray after 15 days was found most economic with highest IBCR as it gave the maximum benefit (1:37.6) which is very large as compared to remaining treatments and the next effective treatment was Azadirachtin followed by Verticillium leccani after 15 days (1:12.5).