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Dwarf Mistletoe and Cytospora Canker Decrease Grand Fir Growth in Central Oregon

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Grand firs with high live crown ratios (LCR) and low dwarf mistletoe ratings (DMR) grew the fastest over the past 25 years while trees with low LCR and high DMR grew the slowest; LCR was the more important factor. However, even trees with high LCR showed markedly reduced growth rates when DMR was high. Mean age when a branch became infected with dwarf mistletoe was 8 years, and infected branches lived an average of 11 years. About 9 percent of the branches with dwarf mistletoe also were infected by the secondary canker fungus, Cytospora abietis. Forest Sci. 30:1071-1079.

Keywords: Abies grandis; Arceuthobium abietinum

Document Type: Journal Article

Affiliations: Plant Pathologist, USDA Forest Service, Forest Pest Management, Pacific Northwest Region, Portland, OR 97208

Publication date: 1984-12-01

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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