Transpiration reduction by surface films

Abstract

Exploratory tests on the possibility of reducing plant transpiration by means of surface films are described. Cetyl alcohol reduced transpiration significantly, but also caused considerable damage to the plants. Low viscosity silicone oils reduced transpiration by up to about 50%, and caused only marginal growth abnormalities. Comparison of the present data with other work where film-forming materials were added to the root medium of plants suggests that foliar application is preferable to root application.