Abstract
The distribution, abundance, and characteristics of sugar maples (Acersaccharum Marsh.) at time of attack by sugar maple borer, Glycobiusspeciosus (Say), were determined on 1.9 ha in Wanakena, New York. Twenty-six percent (n = 78) of the maple stems in the study area were damaged. Average dbh of trees attacked remained the same throughout the 40-year history of the infestation. Mean dbh of trees at time of attack by sugar maple borer was 18.7 cm. Percent cross-sectional area growth at breast height in control trees (3.7%) was significantly greater (P < 0.01) than growth of attacked trees (1.9%) the year preceeding year of attack. Annual mean percentage growth of successfully attacked trees declined 5–10 years prior to year of attack. The cryptic nature of much borer damage indicates that previous estimates of impact are conservative.
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