The research activities described in this book provide a general view of the problem for agricultural scientists and laypeople alike, and it contributes a great deal of pertinent information on the nature and management of the problem in the different crops affected by whiteflies and whitefly-transmitted viruses. In doing so, the Tropical Whitefly Integrated Pest Management Project (TWF-IPM) has paid considerable attention to agricultural sustainability, ecosystem health and human health issues, related to the misuse of highly toxic pesticides associated with whitefly control practices in developing countries. The information contained in the book will form the basis of a worldwide effort aimed at disseminating the knowledge accumulated on the nature of the whitefly/virus problems and the most efficient integrated pest and disease management measures available to develop sustainable mixed cropping systems. Moreover, this knowledge should ultimately contribute to improve the livelihoods of resource-poor farmers affected by these pests throughout the tropics, by safeguarding their food staples and high-value crops, reducing production costs and pesticide contamination, and increasing their family income.