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b'Ichneumonids are potential biocontrol agents of insect pests and widely used in biological pest control programs in the world. Therefore this book contains following chapters on Ichneumonids Prestomerus testaceous Charops obtusus and Diadegma fenestralis. 1.\tGeneral introduction 2.\tMethods of rearing of Ichneumonids and pests 3.\tCollection identification and abundance 4.\tLife cycles 5.\tHost age selection 6.\tHost density 7.\tIntrinsic rates of increase 8.\tEco-biology: Temperature development and survival 9.\tEthology: Mating oviposition and emergence 10.\tDiapause 11.\tMethods of biological control. 12.\tFew research papers. I hope that this is unique book on Ichneumonids and will be useful for farmers students teachers scientists and industrialists.'