Potato late blight, caused by the pathogen Phytophthora infestans, continues to be a major constraint to global potato production. New and more aggressive strains of the potato late blight pathogen continue to emerge, spread, and destroy potato plants worldwide. In many cases farmers' efforts to manage late blight leads to the increased use of fungicides that may be harmful to the environment. The Cornell-Eastern Europe-Mexico International Collaborative Project in Potato Late Blight Control and its collaborators in Mexico, Eastern Europe, and the U.S.A. seek new and safer ways to manage late blight and contribute to the stabilization of potato production by a) breeding and distributing potatoes with durable resistance to late blight suitable to the growing conditions of developed and developing countries; b) increasing the understanding of the biology, epidemiology, and life history of P.infestans; c) evaluating and improving late blight disease management components; and d) facilitating training for scientists, students, and farmers on late blight management methods. CEEM is supported by an anonymous gift and a network of international and national collaborators representing the private and public sectors. An Executive Committee comprised of Cornell University faculty provides management and oversight to the Project in collaboration with an international panel of experts.