Date of Award:
5-1986
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Wildland Resources
Department name when degree awarded
Forest Resources
Committee Chair(s)
Michael J. Jenkins
Committee
Michael J. Jenkins
Committee
James N. Long
Abstract
Ninety-four unmanaged lodgepole pine stands were examined to evaluate the relationship between stand density and susceptibility to mountain pine beetle attack. Sample included stands from a broad geographical range in the western United States.
Beetle population trends were not significantly related to variation in stand density as measured by stand density index (SDI). The percentage of trees killed per acre by the mountain pine beetle in stands with greater than eighty percent lodgepole pine did vary significantly with changes in SDI. From these data three SDI zones were identified: 1) stands with SDI's of less than 125 showed low potential for attack, 2) stands between 125 and 250 SDI showed much greater levels of tree mortality, gradually decreasing toward the 250 SDI, 3) tree mortality decreased in stands as density increased beyond the 250 SDI value.
Checksum
bc0c2bf65e6784b8ecb6ecf4cbe314de
Recommended Citation
Anhold, John Albert, "Lodgepole Pine Susceptibility Rating of Mountain Pine Beetle Through the Use of a Density Management Diagram" (1986). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 7263.
https://digitalcommons.usu.edu/etd/7263
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