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Attacks of Mountain Pine Beetle as Related to Tree Vigor of Ponderosa Pine

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The relationship between tree vigor, measured as stem growth per unit of leaf area, and susceptibility to mountain pine beetle attacks was examined in a stocking-level experiment of ponderosa pine (Pinus ponderosa Laws.) in central Oregon. Vigor decreased as both tree density (basal area) and leaf area index increased. Low vigor trees were more often attacked by beetles than high vigor trees. Attacks increased below a vigor threshold of about 100 g of wood produced per square meter of leaf area per year, corresponding in this study to a basal area of 21 m² ha-1 or a leaf area index of 2.9 m² m-2. For management of ponderosa pine, maintaining vigor through thinning will reduce the risk of mountain pine beetle attacks. Forest Sci. 29:395-402.

Keywords: Dendroctonus ponderosae; Pinus ponderosa; stocking; thinning; tree mortality

Document Type: Journal Article

Affiliations: Research Forester, Silviculture Laboratory, USDA Forest Service, Bend, Oregon 97701

Publication date: 1983-06-01

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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