Agriculture: Towards a New Paradigm of Sustainability Bioefficacy of Some Biorational Insecticides against Fruit Borer Infestation on Tomato under West Bengal Condition

Laishram Laishana, Devi, Abhijit Ghosal, A Senapati, M Chatterjee
An experiment was conducted at the Instruction farm, Jaguli under faculty of Agriculture, Bidhan Chandra Krishi Viswavidhyalaya, Nadia, West Bengal during 2013 to studies the bioefficacy of some biorational insecticides against tomato fruit borer Helicoverpa armigera infestation under West Bengal condition. Efficacy of seven different insecticides had been tested on the basis of percentage of fruit damage and percentage increased/decreased on yield under field condition. All the seven
more » ... the seven insecticides were significantly superior over control and out of seven insecticides, Spinetoram(Spinosad 45% SC) 50 gm a.i/ha provided the highest fruit yield of (33.7 q/ha) as compared to untreated control (18.65q/ha).The present study reveals that Spinetoram is the paramount effective biorational insecticide against fruit borer of tomato. Results shows that among the six biorational insecticides, Spinetoram recorded the overall best control (6.39%) followed by Emamectin benzoate (7.41%), Bacillus thuringiensis (10.43%), Neem (10.56%), Beauveria bassiana (11.01%), Chlorfenapyr (11.30%), Verticillium lecanii (11.41%), respectively providing highest fruit protection over control.