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Saddled prominent has caused severe defoliation in eastern North America at 10-13 year intervals since 1907. Outbreaks consisted of simultaneous infestations in physiographically separated New England mountain systems: the Taconic, Berkshire, Green, and White Mountains. In more extensive outbreaks, concurrent infestations occurred within a 2-3 year period in New England, New York, Pennsylvania, Ontario, Quebec, the Canadian Maritimes, Michigan, and Wisconsin. However, outbreaks were most frequent and persistent in New England, where defoliation first appeared on ridges or upper slopes, and American beech and sugar maple composed at least 60% of the forest. In subsequent years, defoliation persisted in these epicenters (outbreak foci) and spread to stands at lower elevations. General population collapse usually occurred during the third or fourth summer following initial defoliation. Based solely on the historical pattern of infestations, outbreaks are predictable if at all, in the Green and White Mountains in New England. North. J. Appl. For. 5:88-91, June 1988.
Document Type: Journal Article
State University of New York, College of Environmental Science and Forestry, Syracuse, NY 13210
Publication date: June 1, 1988
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Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.