Comparative Efficacy of Some Biorational Insecticides for Management of Shoot and Fruit Borer (Earies Vittella Fab.) on Okra

Laishram Laishana Devi; Tushar M. Ghule; Dr. A.K. Senapati; Prof. M.L Chatterjee

Volume : IV, Issue : IX, September - 2014

Comparative Efficacy of Some Biorational Insecticides for Management of Shoot and Fruit Borer (Earies Vittella Fab.) on Okra

Laishram Laishana Devi, Tushar M. Ghule, Dr. A. K. Senapati, Prof. M. L Chatterjee

Abstract :

A field experiment was conducted during pre–kharif (2012 and 2013) at Jaguli Instructional farm, B.C.K.V., West Bengal, India to evaluate the efficacy of seven biorational insecticides viz., Bacillus thuringiensis, Emamectin benzoate, Spinosad, Chlorofenapyr, Beauveria bassiana, Neem and Verticillium lecanii against Shoot and Fruit Borer (Earias vittella). Two years mean data with respect to effect of different treatments against E. vittella infestation at 15 days interval for each spray revealed significantly minimum shoot and fruit infestation that Spinosad 45% SC@ 50 g a.i/ha (5.62%) followed by Chlorfenapyr @ 100 g a.i/ha (6.16%), Emamectin benzoate 5% SG @ 12 g a.i./ ha (6.89), B. thuringiensis @1000ml/ha (7.56%), Beauveria bassiana @ 300 g a.i./ha (8.30%), Verticillium lecanii @ 1000 ml/ha (8.64%) and neem 10000 ppm @ 3 g a.i./ha (9.37%). The effect of Spinosad 45 SC @50 g a.i/ha treatments on marketable fruit yield (72.18q/ha) on weight basis of okra revealed most effective after each picking, compared to untreated control during both the seasons of field trail.