This is the first book devoted to the epidemiology or epizootiology of insect pathogens. All aspects of the subject are covered, including general principles, concepts and definitions, strategies and methods for research, modeling, factors that influence epizootics, area-wide patterns of disease, all the groups of disease, and practical aspects, such as enhancing disease in pest species, controlling it in beneficial insects or in insect rearing. Material not readily found elsewhere is provided, such as modeling entomopathogen epizootics, general reviews of the epizootiology of various pathogen groups, consideration of microbial control from an epizootiological point of view and a general review of epizootiology in prevention of insect disease. The book offers the most comprehensive bibliography of this subject anywhere, in a well illustrated format.