Many of these advances involve new insights on ecology as well as phylogenetics and molecular biology of viruses, bacteria, fungi, microsporidia, nematodes, and protists. All these aspects, as well as basic biology, diagnosis, infectious process and pathogenesis, host response, transmission and more, are covered by renowned experts in their respective fields. The second edition of includes chapters on the history of this discipline, principles of microbial control and epizootiology, diseases of beneficial insects, host resistance, and Wolbachia. This thoroughly illustrated and up-to-date revision will provide insect pathologists, entomologists, microbiologists, mycologists, nematologists, protistologists, ecologists, and practitioners of biological control of insect pests with a solid and much-needed reference.