Chemical control leads to many serious problems like air and water pollution, health hazards, killing of beneficial animals, pest resistance, secondary pest out-break, pest resurgence, interruption in eco-cycles, etc. Hence, biological pest control is visualised as living weapon over chemical control. The parasitoids are potent biological agents of insect pests and widely used in biological pest control method. The book includes importance of parasitoids in biocontrol method, taxonomical details of the parasitoid species (braconids and ichneumonids) and the parasitoid index of India. The book will be useful guide to students, farmers, teacher and researchers in the field of pest management and parasitology