M. K. JAT, B. S. RANA, O. P. AMETA, S. K. JAT AND A. MURDIA

The relative efficacy of biopesticides was evaluated in field trials carried out at Horticulture Farm, Rajasthan College of Agriculture, Udaipur during rabi, 2012-13. Among different treatments tested, Verticillium lecani @ 1x108 CFU/g caused maximum reduction of 74.18 per cent in population of aphid and was significantly superior over other treatments followed by Spinosad 45 SC @ 200 ml/ha and Metarhizium anisopliae @ 1x108 CFU/g with 55.67 and 42.12 per cent mean reduction. Spinosad 45 SC @ 200 ml/ha caused maximum reduction in population of diamond back moth (75.67%) and flea beetle (80.30%) that was significantly superior over other treatments followed by Bacillus thuringiensis var. kurstaki @ 1 kg/ha (71.25% and 70.34%) and Metarhizium anisopliae @ 1x108 CFU/g (60.20% and 59.12%). Spinosad 45 SC @ 200 ml/ ha also caused maximum reduction of tobacco caterpillar (85.33%) and was significantly superior over other treatments followed by SlNPV @ 250 LE (1.5X1012 POB/ha) (83.15%) and B. t. var. kurstaki @ 1 kg/ha (75.20%).