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Effects of Insect Defoliation on Growth and Foliar Nutrients of Young Balsam Fir

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Intact healthy needles from young balsam fir (Abies balsamea (L.) Mill.) trees with various defoliation histories showed increased weights and concentrations of nitrogen, phosphorus, potassium, calcium, and magnesium as compared to similar needles from shoots that were not defoliated. During the first year of defoliation of the current year's foliage, a concomitant reduction in volume growth occurred. A loss of two age classes of needles resulted in about 50 percent reduction of the projected stem volume growth. Practical implications of the findings are discussed. Forest Sci. 26:665-673.

Keywords: Abies balsamea; spruce budworm defoliation; tree response

Document Type: Journal Article

Affiliations: Maritimes Forest Research Centre, Canadian Forestry Service, Department of the Environment, P.O. Box 4000, Fredericton, N.B. Canada

Publication date: December 1, 1980

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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