This book reviews the interagency research and development effort on classical biological control in the USA from 1992-2002. The successful exploration, importation, screening, evaluation, rearing, and establishment of at least five exotic Bemisia. tabaci natural enemies in rapid response to the devastating infestations in the USA is a landmark in interagency cooperation and coordination of multiple disciplines. In this volume, the various authors present detailed reviews of natural enemy exploration, introduction, and evaluation efforts that will serve as a guide to support and encourage classical biological control inputs into other integrated pest management systems.