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Home → Publications → Seed and Seedling Diseases in the Western US → Evaluation of Root Disease Losses on the Blue Fat Timber Sale Cabinet Ranger District Kootenai National Forest, Montana

Evaluation of Root Disease Losses on the Blue Fat Timber Sale Cabinet Ranger District Kootenai National Forest, Montana

A variable plot survey was conducted on approximately 66 acres, representative of the Blue Fat timber sale on the Cabinet Ranger District, tootenai National Forest, in northwestern Montana. The survey was designed to determine current levels of root disease impact as measured by tree mortality, basal area, and volume losses by different pathogens. The major root pathogen encountered was Phellinus weirii; Armillaria mellea and Phaeolus schweinitzii were also found. Fir engraver and western balsam bark beetle were associated with several grand fir and subalpine fir infected with P. weirii.


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Author(s): USDA Forest Service