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Home → Publications → Seed and Seedling Diseases in the Western US → Evaluation of Root Disease on the Ducharme Logging Unit, Flathead Indian Reservation

Evaluation of Root Disease on the Ducharme Logging Unit, Flathead Indian Reservation

A root disease evaluation was completed for the Ducharme logging unit near the southeast corner of Flathead Lake. Extensive root disease was found on Douglas-fir throughout the unit. The major pathogen on the site was Armillaria mellea. Black stain (Verticicladiella sp.) was isolated from one tree which was also Infected with A. mellea. Bark beetles were not associated with mortality In the unit. Several management approaches to reduce disease losses are discussed.


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Author(s): USDA Forest Service