Insect pest management is chronic problem of agriculture, forestry and other areas. Ecological control of insect pests is very sound and ecofriendly alternative for chemical control in pest management strategies. The book contains national and international status of the topic; detailed concepts of ecological insect pest management of various kinds of pests. Specially biotic and abiotic factors and their role in pest control. It also provides details of rearing technology of pests and parasitoids. Emphasis is given on ecological aspects such as survey and occurrence, life cycle, development, longevity, sex ratio, nutritional requirement, ecobiology, life table statistics and intrinsic rates of natural increase, parasitoids, predators, diseases, intra and inter specific competitions and their role in control of Lepidopterous pests like Spilosoma obliqua, Amsacta lactinea and Thiocidas postica. The book will fulfill the gap of ecological knowledge on insect pest management and helpful to students, teachers, scientists and farmers both in India and abroad.