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    Author(s): Lorne West
    Date: 1989
    Source: In: Otrosina, William J.; Scharpf, Robert F., technical coordinators. 1989. Proceedings of the symposium on research and management of annosus root disease (<i>Heterobasidion annosum</i>) in western North America; April 18-21, 1989; Monterey, CA. Gen. Tech. Rep. PSW-GTR-116. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; p. 167-170
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (41 KB)

    Description

    Trees affected by the annosus root disease are easily windthrown or fall without visible symptoms that might warn forest recreation managers of impending failure. Some of the treeshave struck cabins or campsites, causing death or destroying vehicles and recreational facilities. To prevent loss of life or property, and to save as many trees as possible for landscaping purposes, the management option of creating a buffer zone by removing the first line of trees from around each infection center was selected. However, the selection of buffer zone cutting resulted in removing 249 trees or nearly 90 percent of the overstory trees over a 3-year period. This effectively clear cut much of the area since many smaller centers had coalesced into a few large centers. As a result of the cutting, two other management concerns developed: 1) the need to revegetate the area, and 2) the need to remove a single line of trees that remained between some centers and were subject to windthrow. Revegetation is continuing with native trees and shrubs.

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    Citation

    West, Lorne 1989. Management of Annosus Root Disease Caused by Heterobasidion annosum in Coniferous Trees in Yosemite National Park. In: Otrosina, William J.; Scharpf, Robert F., technical coordinators. 1989. Proceedings of the symposium on research and management of annosus root disease (Heterobasidion annosum) in western North America; April 18-21, 1989; Monterey, CA. Gen. Tech. Rep. PSW-GTR-116. Berkeley, CA: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture; p. 167-170

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