Hymenopterous parasitoids like Ichneumonids, Braconids and Trichogrammatids are very potential biocontrol agents hence used in biological pest control at global scenario including India. Biological control is very good alternative for chemical control. Pesticides lead very serious problems like pollutions, health hazards, killing of beneficial organisms, pest resistance, pest resurgence, secondary pest outbreak etc.The book will be stimulatory and helpful to students, scientists and workers in biological pest control.