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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 sevenfatcat:rl55dwzuibaozgmayqudbjy6wm