Management Strategies for Annosus Root Disease in Pacific Northwest Coastal Western Hemlock

Abstract

Actual loss from annosus root disease infections in hemlock stands is difficult to determine. As political trends move toward protecting old-growth timber, greater market demand will be placed on second growth western hemlock. These stands must be kept healthy for maximum productivity. The paper compares the following 70-year rotation timber management scenarios: The first has a single juvenile spacing entry and low infection. The second has early spacing plus a commercial thinning with considerable crop tree wounding and high infection. Operational guidelines are presented for management of coastal western hemlock to minimize losses due to annosus root disease.

Parent Publication

• Proceedings of the symposium on research and management of annosus root disease (Heterobasidion annosum) in western North America; April 18-21, 1989; Monterey, CA.

Citation

Russell, Kenelm W. 1989. Management Strategies for Annosus Root Disease in Pacific Northwest Coastal Western Hemlock. 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. 153-158