In recent times, crop production has been severely threatened by increasing difficulties in controlling American bollworm, Helicoverpa armigera as it has developed high levels of resistance to commonly used insecticides. Use of bio-intensive integrated pest management strategies can reduce existing over-dependence on insecticides and their negative effects on the environment. Manipulation of cultural practices, host-plant resistance and biological control can play a crucial role in reducing the ravages caused by this pest. Among microbial control agents, entomopathogenic nematodes...