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Ability of selected fungi from Douglas-fir poles to degrade wood and their tolerance to wood-preserving chemicals

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dc.contributor.advisor Mckimmy, M. D.
dc.contributor.advisor Graham, Robert D.
dc.creator Safo-Sampah, Stephen
dc.date.accessioned 2010-07-20T21:08:12Z
dc.date.available 2010-07-20T21:08:12Z
dc.date.issued 1975-08-08
dc.identifier.uri http://hdl.handle.net/1957/16959
dc.description Graduation date: 1976 en
dc.description.abstract Wood degrading ability and tolerance to wood-preserving chemicals of several fungi isolated from Douglas-fir utility poles were investigated by the agar-stick and soil-block methods. Birch (Betula. sp. ) wood sticks and western hemlock (Tsuga heterophylla) wood blocks were used. The soil-block and agar-stick tests provided identical weight loss rankings of the eight fungi from Douglas-fir poles. Breaking radius appeared to be a more sensitive and rapid indicator of decay than was weight loss and provided a reasonable basis for detecting decay fungi. Decay caused by the brown-rot fungi, Poria carbonica and Poria monticola was more severe with increase in incubation time expressed either as strength reduction or weight reduction. The white-rot fungus, Schizophyllum commune caused relatively little weight loss and gave erractic results. Except for Phialophora fastigiata., the fungi-imperfecti caused relatively little weight loss but a relatively large change in breaking radius after twelve weeks. In the preservative tolerance test, the brown-rot fungi were highly resistant to ammoniacal copper arsenite and moderately tolerant to creosote and pentachlorophenol. The white-rot fungus was susceptible to all preservatives except creosote. The fungi-imperfecti, Hyalodendron lignicola and Phialophora fastigiata were highly tolerant to all preservatives. In a study of classifying hymenomycetes isolated from Douglasfir utility poles into brown-and white-rot fungi by the oxidase test method, brown-rots were more prevalent than white-rot fungi. The intensity of the oxidative reaction and the time required showed considerable variation among the white-rot fungi. en
dc.language.iso en_US en
dc.subject.lcsh Wood-decaying fungi en
dc.title Ability of selected fungi from Douglas-fir poles to degrade wood and their tolerance to wood-preserving chemicals en
dc.type Thesis/Dissertation en
dc.degree.name Master of Science (M.S.) in Forest Products en
dc.degree.level Master's en
dc.degree.discipline Forestry en
dc.degree.grantor Oregon State University en
dc.description.digitization File scanned at 300 ppi (Moochrome, 256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en

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