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Effects of Harvesting Season and Stump Size on Incidence of Annosus Root Disease of True Fir

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A high frequency (89%) of annosus root disease caused by Heterobasidion annosum was found in true fir stumps cut 5 to 10 years earlier in northeastern Oregon. Neither season of harvesting nor stump size significantly affected the amount of stump decay which averaged 51%. Another root pathogen, possibly a species of Armillaria heretofore not recorded in Oregon, was often found in H. annosum-infected stumps. Additional surveys and research are recommended in true fir forests throughout western North America. West. J. Appl. For. 7(2):54-56.

Document Type: Journal Article

Affiliations: Blue Mountain Zone, USDA Forest Service, 1401 Gekeler Lane, La Grande, OR 97850

Publication date: April 1, 1992

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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