Notes: Root Diseases Cause Severe Mortality in White and Grand Fir Stands of the Pacific Northwest
Abstract:Forteen stands totaling 2,750 ha and comprised primarily of white or grand fir were examined for mortality caused by three root pathogens: Phellinus weirii, Armillaria mellea, and Fomes annosus. Trees judged to have been dead less than 20 years were tallied. These amounted to 4-55 percent of the trees, 8-39 percent of the basal area, and 7-33 percent of the volume. These data indicate that root diseases can be serious problems in white and grand fir stands and should be a major concern of foresters and scientists managing and studying these species. Forest Sci. 30:138-142.
Document Type: Miscellaneous
Affiliations: Plant Pathologists, Forest Pest Management, USDA Forest Service, Portland, OR 97208
Publication date: March 1, 1984
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