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Published online 1 November 1968
Published in Agron J 60:598-601 (1968)
© 1968 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect and Mode of Action of Latex and Silicone Coatings on Shoot Growth and Water Use by Citrus1

C. V. Malcolm and L. H. Stolzy2

Coatings of latex and silicone were applied to potted sweet orange :seedlings which were then grown either in the glasshouse or outside. Measurements of growth and moisture usage over a 20-day period indicated that latex reduced moisture usage significantly in both situations. Growth was not significantly different for the treatment in any one environment. Leaf burn was less on latexcoated plants but distortion of the growing shoot appeared greater than in silicone-coated and uncoated plants.

Latex coatings applied to perforated Al-foil achieved considerable reductions in water vapor diffusion without completely covering the individual perforations. It is suggested transpiration reduction may be achieved by reducing stomatal pore size or by actually covering the pore.

Key Words: latex coatings • silicone coatings • perforated foil • antitranspirants

1 The work was carried out during the tenure of an FAO André Mayer Research Fellowship, part of which was spent at the University of California, Riverside, Department of Soils and Plant Nutrition. Financial support was received from the Fellowship and from the West Australian Department of Agriculture. Appreciation is expressed to the three organizations involved.

2 FAO Andrè Mayer Research Fellow, working at Department of Soils and Plant Nutrition, University of California, Riverside, presently in Soils Division, Department of Agriculture, Perth, Western Australia; and Professor of Soil Physics, Department of Soils and Plant Nutrition, University of California, Riverside 92502.

Received for publication December 29, 1967.




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Copyright © 1968 by the American Society of Agronomy.