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Colonization of Wood Disks Initiated by Basidiospores of Phellinus weirii (Laminated Root Rot)

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The importance of basidiospores of Phellinus (Poria) weirii in spread of laminated root rot in western North America is unknown. In this study, basidiospores of P. weirii were able to germinate and initiate colonization of previously frozen and scalded wood disks cut from nine species of conifer and two species of hardwoods. Colonization was best at temperatures of 15°-20°C when an aqueous suspension of spores in concentrations of 400/ml or greater were sprayed on disks. Disks first sprayed with a soil suspension or buried after inoculation were not colonized by P. weirii. Western redcedar, Sitka spruce, bigleaf maple, and red alder were colonized to a lesser extent than were other species. Sapwood of Douglas-fir was more easily colonized than heartwood. In western forests, temperature conditions similar to those under which colonization was successful probably exist most years during late summer and early autumn. Forest Sci. 22:407-411.

Keywords: Poria weirii; resistance; root disease; spore infection

Document Type: Journal Article

Affiliations: Supervisory Research Plant Pathologist, Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Corvallis, Oregon

Publication date: 1976-12-01

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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