Effects of Thinning on Volume Growth of Western Larch Infected with Dwarf Mistletoe in Northeastern Oregon
Authors: Filip, Gregory M.; Colbert, J. J.; Parks, Catherine A.; Seidel, Kenneth W.
Source: Western Journal of Applied Forestry, Volume 4, Number 4, 1 October 1989 , pp. 143-145(3)
Publisher: Society of American Foresters
Abstract:Cubic volume growth and tree vigor of 70-year-old western larch (Larix occidentalis) with and without dwarf mistletoe (Arceuthobium laricis) were measured 15 years after thinning from above or below to residual densities of 50 to 170 ft²/ac. Vigor was assessed by cambial electrical resistance (CER). Proportional volume growth increased after thinning; was significantly related to the interaction of thinning method and residual density; and decreased with increased dwarf mistletoe severity. Thinning from above was associated with significantly higher proportional volume growth, but led to increased mortality from snow and ice damage to infected trees. CER was significantly related to severity of infection but not to treatment. Thinning is recommended in dwarf mistletoe infested stands of western larch to increase volume growth and reduce new infections in residual trees. West. J. Appl. For. 4(4):143-145, October 1989.
Document Type: Journal Article
Affiliations: USDA Forest Service, Pacific Northwest Research Station, Silviculture Laboratory, Bend, OR 97701
Publication date: 1989-10-01
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