This review of recent research data on application, effects and potential uses for antitranspirants in plant growth shows particular possibilities for conserving irrigation water, aiding plant survival under dry conditions, and protecting foliage against fungus, insects, smog, and salt spray. This information is not to be considered a recommendation of the University of California. Continued research is necessary to determine which materials offer the maximum reduction in transpiration with minimum reduction in photosynthesis, as well as optimum concentrations and application methods. A list of some antitranspirant materials (naming manufacturers and addresses) is available upon request to California Agriculture, Agricultural Publications, University Hall, University of California, Berkeley, California 94720.

This study was supported by funds provided by the United States Department of the Interior, Office of Water Resources Research, as authorized under the Water Resources Research Act of 1964, and by the University of California, Water Resources Center.