Bio-efficacy of Beauveria bassiana (Balsamo) Vuillemin and different insecticides against Lipaphis erysimi (Kaltenbach) under laboratory condition

Background: A laboratory experiment was conducted to determine the bio-efficacy of B. bassiana alone and in combination with different insecticides against Lipapis erysimi in mustard under laboratory condition at bio-control laboratory, Department of Entomology, College of Agriculture, Junagadh Agricultural University, and Junagadh during 2016-17. The results indicated that the different treatments evaluated for their laboratory efficacy against L. erysimi showed that the treatment of imidacloprid 17.8 SL@ 1 ml/litre recorded the highest (94.81%) mortality after 7th day of its application. Whereas, dimethoate 30 EC @1ml/litre and diafenthiuron 50 WP @ 1g/litre found next better treatments with 85.52 and 85.39% nymphal mortality, respectively.