Precommercial Thinning in a Ponderosa Pine Stand affected by Armillaria Root Disease: 20 Years of Growth and Mortality in Central Oregon

Authors: Filip, Gregory M.; Goheen, Donald J.; Johnson, David W.; Thompson, John H.

Source: Western Journal of Applied Forestry, Volume 4, Number 2, 1 April 1989 , pp. 58-59(2)

Publisher: Society of American Foresters

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Abstract:

A naturally regenerated stand of ponderosa pine (Pinus ponderosa) was thinned in 1966 to determine the effects of spacing on crop-tree mortality caused by Armillaria root disease in central Oregon. After 20 years, crop-tree mortality in unthinned plots exceeded that in the thinned plots (1.6 vs. 0.8 trees/ac/yr). Crop-tree diameter growth, however, was greater in thinned plots (0.2 vs. 0.1 in./yr). Forest managers should not defer thinning of similar stands because of Armillaria root disease. West J. Appl. For. 4(2):58-59, April 1989.

Document Type: Journal article

Affiliations: 1: Timber, Cooperative Forestry and Pest Management, USDA Forest Service, P.O. Box 7669, Missoula, MT 59807

Publication date: 1989-04-01

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