Impact of Precommercial Thinning on Development of Heterobasidion annosum in Western Hemlock

Robert L. Edmonds; David C. Shaw; Tom Hsiang; Charles H. Driver

Treesearch

Impact of Precommercial Thinning on Development of Heterobasidion annosum in Western Hemlock

Informally Refereed

Authors:

Robert L. Edmonds, David C. Shaw, Tom Hsiang, Charles H. Driver

Year:

1989

Type:

General Technical Report

Station:

Pacific Southwest Research Station

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. 85-94

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Abstract

The impact of precommercial thinning of western hemlock (Tsuga heterophylla) on the development of Annosus root and butt rot (caused by Heterobasidion annosum) in coastal Washington has been followed for more than 20 years. Infection of stumps and wounds was high following thinning and there was a high probability of residual tree infection. Eleven years after precommercial thinning tree infection was high, but after 20 years levels of infection were low in both thinned and unthinned stands (averaging

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

Edmonds, Robert L.; Shaw, David C.; Hsiang, Tom; Driver, Charles H. 1989. Impact of Precommercial Thinning on Development of Heterobasidion annosum in 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. 85-94