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A critique of silvicultural approaches to managing defoliating insects in North America

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1 A variety of silvicultural techniques have been suggested for managing forest defoliating insects. The objectives focus on minimizing defoliation or minimizing damage from defoliation.

2 The theoretical foundations of many approaches have been built upon observation and correlation, and very little reliable empirical evidence exists to support the objectives of silvicultural manipulations. Existing experimental data have yielded inconsistent results.

3 We review the conceptual framework and underlying assumptions of the major silvicultural approaches recommended or in use in North America.

4 Well-designed, long-term studies are needed to clarify the effect of silviculture on defoliators and their effect on forests.

Keywords: Choristoneura fumiferana; Choristoneura occidentalis; Lymantria dispar; gypsy moth; silviculture; spruce budworm; susceptibility; vulnerability

Document Type: Research Article


Affiliations: Department of Forestry, 203 Natural Resources Bldg, University of Missouri, Columbia, Missouri 65211, U.S.A. and USDA Forest Service, North-eastern Research Station, 180 Canfield Street, Morgantown, West Virginia 26505, U.S.A.

Publication date: 2000-05-01

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