Pacific Southwest

Title: Factors Affecting Infection of Precommercial Thinning Stumps by Heterobasidion annosum in Coastal British Columbia

Author: Morrison, D. J.

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 (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. 95-100

Station ID: GTR-PSW-116

Description: Stumps of Douglas-fir, western hemlock, Sitka spruce, and amabilis fir were sampled in precommercially thinned stands to determine the percentage of stump surface area colonized by Heterobasidion annosum. There were significant differences among species in the percentage of stumps colonized. Seasonal patterns were evident for each species; however, differences were not significant. Both the percent incidence of infection and the percentage of surface area colonized increased with increasing stump diameter. The results indicate that stump treatment to prevent infection is not necessary for Douglas-fir, but it should be considered for the most susceptible species, Sitka spruce and amabilis fir.

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Citation

Morrison, D. J.  1989.  Factors Affecting Infection of Precommercial Thinning Stumps by Heterobasidion annosum in Coastal British Columbia.   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. 95-100.