Summarizing current knowledge on symbiotic organisms in the biology of insects, "Insect Symbiosis, Volume II" describes the diversity of symbiotic bacteria associated with pests such as whiteflies, aphids, mealybugs, psyllids, and tsetse flies. The book illustrates how symbiosis research has important ramifications for evolutionary biology, physiology, parasitology, genetics, and animal behavior and is especially relevant to the control of agricultural and disease-carrying pests. In this second volume, a few repeat authors describe brand new aspects of their research, while a new group covers recently developing aspects of symbiotic relationships. The book includes updated information on Wolbachia biology and how it influences insect life, supplies two new examples of using symbionts in crop protection, and discusses the recent "bug in a bug" mealy bug case. The book provides analysis and synthesis of cutting-edge research in insect symbiosis that sheds light on the evolution of the host/symbiont relationship, and in turn, on the general study of evolution, physiology, and genetics.