An international state-of-the-art source book, providing a balanced synthesis of basic and applied information on all aspects of plant response to environmental stress. Twenty-five scientists presently involved in stress research review both field observations on crop performance and laboratory observations. Coverage includes temperature, ion stress, drought, and physical stress, as well as a general examination of both disease and air pollution effects on crop yields. The book stems from the International Conference on Stress Pnysiology in Crop Plants, cosponsored by the Rockefeller Foundation and the Boyce Thompson Institute for Plant Research in June 1977. Most papers have been modified to represent comments and questions raised.