Their natural enemies largely determine the population size and dynamic behavior of many plant-eating insects. Any reduction in enemy number can result in an insect outbreak. Applied biological control is thus one strategy for restoring functional biodiversity in many agroecosystems. Predators and Parasitoids addresses the role of natural enemies in pest control as an integrated pest management concept. It examines how Trichogramma, the extensively studied natural enemy of insect pests, has been used as a pest management tool, and it describes important aspects such as the inducible defense...