The gram pod borer, Helicoverpa armigera is a widespread polyphagous pest species of many agricultural and horticultural crops. As this pest has been recorded to be a serious pest, damage almost every vegetation like cotton, chickpea, pea, pigeon pea etc, Economic loss of near about 4500 crore. It has developed resistance to almost all conventional insecticides including synthetic pyrethroids. Therefore, to control this pest and the loss this investigation has been done to check the infectivity of Entomopathogenic nematode Oscheius ciceri on Helicoverpa armigera.