Abstract
The present experiment was carried out at Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj, Uttar Pradesh, during Rabi season of the year 2023-2024under Randomized Block Design (RBD) with eight treatments and three replications. Single spray Twosprays were undertaken at fourteen days interval. Neem oil 5 %, imidacloprid 17.8 SL, Beauveria bassiana 1.15 % WP, Nisco Sixer plus, Metarhizum anisopliae, spinosad + neem oil 5 %, spinosad 45% SC were the treatments tested against the mustard aphid, Lipaphis erysimi (Kalt.). Results show that imidacloprid 17.8% SL was significantly superior over the other treatments showing 30.08/top 10cm twig and Beauveria bassiana being least effective recorded the highest number of aphids of 69.53/top 10cm twig of plant. The highest yield and cost benefit ratio was recorded from the plots treated with imidacloprid 17.8% SL (18.5 q/ha and 1:5.19) and the lowest from Beauveria bassiana (12.55 q/ha and 1:3.43).
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