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Occurrence of Fungi Antagonistic to Poria weirii in a Douglas-Fir Forest Soil in Western Oregon

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Five fungi isolated from forest soil--Trichoderma viride, Pestalotia sp., Gliomastix chartarum, Cephalosporium acremonium, and what appears to be a mutant of Penicillium humuli--were consistently antagonistic to Poria weirii on malt agar as were a few other miscellaneous isolates. Total fungus colonies on soil-dilution plates fluctuated seasonally in response to changes in soil moisture content but did not appear to be correlated with other measured values of soil organic content or pH. Soil temperature, from U.S. Weather Bureau records for Corvallis, varied inversely with fungus populations. Principal antagonists comprised only about 6.7 percent of all fungi counted over the 2-year period of sampling.

Keywords: Pseudotsuga menziesii; soil fungi

Document Type: Journal Article

Affiliations: Plant Pathologist, Pacific Northwest Forest and Range Experiment Station, Forestry Sciences Laboratory, Forest Service, U. S. Dept. Agric., Corvallis, Oregon.

Publication date: March 1, 1969

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.
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