author(s)
Rahul, RS Singh and Neelam Yadav

abstract
Field experiment on management of aphid through bio-insecticides was conducted during Rabi 2010-11 and 2011-12. It was found that mustard variety Rohini applied with Dimethoate (2ml/liter) gave maximum yield (22.5 q/ha) and incremental cost benefit ratio was (ICBR) 1:14.5, followed by the same variety of crop treated and applied with Verticillum lecanii (5g/liter) gave 20.9 q/ha production and ICBR 1:12.0 However mustard variety Urvashi applied with Beauveria bassiana (2g/liter) ranked last producing 9.1 q/ha and ICBR 1:0.1. On the basis of toxicity against Coccinella septempunctata the order was Beauveria bassiana > Neemarin > Verticillum lecanii > Dimethoate. It may be concluded that the expression of growth, yield and net profit of mustard under the agro-climatic conditions of central plain zone of U.P. can be enhanced by application of bio-insecticides Verticillum lecanii at timely application.