Daminozide and Ethephon Effects on Growth of Red Maple and White Pine on Cleared Sites
Abstract:The effects of foliar applications of daminozide [butanedioic acid mono (2,2-dimethylhydrazide)] and ethephon [(2-chloroethyl) phosphonic acid], alone and in combination, on the growth of planted white pine seedlings (Pinus strobus L.) and resprouts of red maple (Acer rubrum L.) were studied on clearcut areas in Virginia. Shoot growth of white pine seedlings was not significantly affected by any of the treatments. Ethephon at 1.6 kg/ha reduced red maple shoot growth by approximately 50 percent, and caused chlorosis and necrosis of treated leaves, defoliation, and dieback. Ethephon in combination with daminozide (1.6 + 1.6 kg/ha) inhibited red maple shoot growth by approximately 45 percent without causing severe leaf or stem injury and did not appear to reduce the estimated in vivo dry matter digestibility of red maple by deer. Forest Sci. 30:291-299.
Document Type: Journal Article
Affiliations: Professor of Plant Physiology, Department of Plant Pathology and Physiology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
Publication date: 1984-06-01
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