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Title: Growth of ponderosa pine stands in relation to mountain pine beetle susceptibility

Author: Obedzinski, R. A.; Schmid, J. M.; Mata, S. A.; Olsen, W. K.; Kessler, R. R.;

Date: 1999

Source: Gen. Tech. Rep. RMRS-GTR-28. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 13 p.

Publication Series: General Technical Report (GTR)

Description: Ten-year diameter and basal area growth were determined for partially cut stands at 4 locations. Average diameters in the partially cut plots generally increased by 1 inch or more, while average diameter in the uncut controls increased by 0.9 inches or less. Individual tree growth is discussed in relation to potential susceptibility to mountain pine beetle infestation. Basal area increases ranged from 0.9 to 1.9 ft2/acre/ yr in partially cut plots, while basal area increases in the control plots ranged from 0.4 to 1.4 ft2/acre/yr. Endemic mountain pine beetle infestations and snow breakage accounted for most of the mortality on the plots, which decreased the residual basal area and basal area growth. Increases in basal area are used to estimate the length of time required for various stand densities to reach the susceptibility thresholds for mountain pine beetle infestation. Stand marking may influence future susceptibility to beetle infestations.

Keywords: Ponderosa pine, basal area growth, diameter growth, mountain pine beetle, stocking levels

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Obedzinski, R. A.; Schmid, J. M.; Mata, S. A.; Olsen, W. K.; Kessler, R. R. 1999. Growth of ponderosa pine stands in relation to mountain pine beetle susceptibility. Gen. Tech. Rep. RMRS-GTR-28. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 13 p.

 


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