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Cambial dieback and taphole closure in sugar maple after tapping

Informally Refereed

Abstract

Dead cambial tissues adjacent to tapholes were found to be elliptical in shape and to average 1.6 inches in length and 0.2 inch in width. Chemical and physical treatments designed to stimulate the growth of callus tissues surrounding tapholes were not successful. Nearly all the tapholes, both treated and untreated, had closed after three growing seasons.

Citation

Gibbs, Carter B.; Smith, H. Clay. 1973. Cambial dieback and taphole closure in sugar maple after tapping. Research Note NE-155. Upper Darby, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 4p.
https://www.fs.usda.gov/research/treesearch/19508