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Rate and Depth of Sapwood Occlusion Following Inoculation of Pines with Bluestain Fungi

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Length of sapwood lesions, depth of sapwood occlusion, and proportion of sapwood occluded increased generally but irregularly through the first 9 weeks following inoculation of small (17-32 cm dbh) Pinus ponderosa with Ophiostoma minus or Leptographium terebrantis. No significant increases were detected between 9 and 64 weeks. The average proportion of sapwood depth occluded at 4 weeks ranged from 0.1-0.15 for O. minus and 0.2-0.4 for L. terebrantis. This rate of occlusion was judged inadequate per se to account for development of crown symptoms in trees following mass attack by bark beetles. For. Sci. 38(1):34-44.

Keywords: Leptographium terebrantis; Ophiostoma minus; Pinus ponderosa; bark beetles

Document Type: Journal Article

Affiliations: Professor, Department of Entomological Sciences, University of California, 201 Wellman Hall, Berkeley, CA 94720

Publication date: February 1, 1992

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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