Field Efficacy of Various Insecticides on Natural Enemy (Chrysoperla carnea) in Sobean Ecosystem

Bioefficacy of some selected insecticide molecules on chrysopa population was conducted during Kharif 2014 in soybean ecosystem in the College of Agriculture Nagpur. Least average number of grubs (0.33 Chrysopa/5 plants) recorded in treatment of Fenvalerate 20 EC @ 0.50 ml found to be superior as compared to other treatments at 30 DAE, while no population was recorded at 60DAE. The next effective treatments were emamectin benzoate 5 S G @ 0.3 g per l, Spinosad 45 SC @ 0.25 ml per l, Indoxacarb 15.8 EC @ 0.60 ml per l, which were on par with T6 and T3. Whereas, Beauveria bassiana 1x10⁸ CFU @ 4 g per l and Neem Seed Extract (NSE) @ 5 per cent were recorded more Chrysopa population and were found to be on par with untreated control.