The aim of our research work was to study the host range of entomopathogenic nematodes against different insect pests. The efficacy of the entomopathogenic nematodes, viz., Heterorhabditisindica and Sterinernemaglaseri were studied against three orders insect pest. Seventeen insect species belonging to three orders, viz., Lepidoptera, Coleoptera, Hemiptera and one slug were recorded as hosts for H. indica and S. glaseri. H. indica was found to be more virulent to Spodopteralitura and Helicoverpaarmigera than S. glaseri.
H. indica and S. glaseri were able to infect, develop and complete their life cycle on 17 insect species in the orders viz., Lepidoptera, Coleoptera and Hemiptera and one slug. H. indica and S. glaseri did not multiply on F. virgate and O. rhinoceros.