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Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

Creator:: Nebeker, T. Evan
Abstract:: A population of the Douglas-fir cone moth, Barbara colfaxiana (Kft. ), was studied on the Buckhead Seed Production Area, Oakridge, Oregon, during 1971 and 1972. A method of estimating cone and insect populations is presented. Factors contributing to the mortality of B. colfaxiana are discussed, with resinosis being the critical...
Resource Type:: Dissertation
Full Text:: Population dynamics of the Douglas-fir cone moth

Insects associated with black stain root disease of Douglas-fir in western Oregon

Creator:: Witcosky, Jeffrey John
Abstract:: The root systems of Douglas-fir trees infected with Verticicladiella wagenerii and assigned by crown color and terminal growth characteristics to several stages of decline were excavated at three widely separated sites in the Coast Range of Oregon. Data were gathered on insect species present, extent of colonization of the root...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir in western Oregon AN ABSTRACT OF THE THESIS OF Jeffrey John Witcosky for the degree of

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Creator:: Angwin, Peter A.
Abstract:: Studies to identify the environmental factors that influence the rate of ectotrophic mycelial growth of Phellinus weirii (Murr.) Gilbertson along Douglas-fir roots were undertaken both in the laboratory and in the field. The effects of soil pH, nitrogen, moisture, temperature, microorganisms and bulk density were investigated. In the lab, the...
Resource Type:: Masters Thesis
Full Text:: Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir AN ABSTRACT OF THE THESIS OF Peter Andrew

Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

Creator:: Hessburg, Paul F.
Abstract:: Verticicladiella wageneri Kendr. is a vascular wilt pathogen of Douglas-fir in the Pacific Northwest, The disease is characterized by black staining of colonized sapwood; crown symptoms are those typical of a wilting syndrome. Histopathological studies revealed that the pathogen is limited to the xylem but causes vascular dysfunction in both...
Resource Type:: Dissertation
Full Text:: wageneri in Douglas-fir (Pseudotsuga menziesii) AN ABSTRACT OF THE THESIS OF Paul Francis Hessburg for

Degradation of phenolic components of Douglas-fir bark by fungi

Creator:: Ross, William David, 1937-
Resource Type:: Dissertation
Full Text:: ) Title: DEGRADATION OF PHENOLIC COMPONENTS OF DOUGLAS- FIR BARK BY FUNGI Abstract approve Malcolm E

Some silvicultural impacts of Phellinus weirii on a managed forest in the interior Coast Range of Oregon

Creator:: Lawson, Thomas Taylor
Abstract:: Phellinus weirii, the cause of laminated root rot, is considered the most destructive root rot of Douglas-fir, but little is known about the damage it causes, to a forest. The objective of this study was to determine silvicultural impacts of P. weirii on a managed forest. A survey located and...
Resource Type:: Masters Thesis

Lichens on Douglas fir trees

Creator:: Edin, Nils
Resource Type:: Undergraduate Thesis
Full Text:: Lichens on Douglas fir trees SCHOOL OF FORESTRY OKEGON

Survival and pathogenicity of Phytophthora cinnamomi Rands in forest soils

Creator:: Kuhlman, Elmer George, 1934-
Resource Type:: Dissertation
Full Text:: from the Willamette Valley after different monthly intervals .. . . . . . . . 6 Roots of Dougis-fir

Poria weirii root rot of Douglas-fir : survival of the pathogen and infection of the host

Creator:: Nelson, E. E.
Resource Type:: Dissertation
Full Text:: Poria weirii root rot of douglas-fir: survival of the

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

Creator:: Graham, James Herbert
Abstract:: The ectomycorrhizal fungi Cenococcum geophilum, Hebeloma crustuliniforme and Laccaria laccata produced ethylene in vitro in modified Melin-Norkrans liquid medium only if amended with 2.5 to 10 mM methionine; Pisolithus tinctorius failed to produce ethylene unless the cultures were renewed with fresh methionine-amended medium prior to ethylene assay. An additional 19...
Resource Type:: Dissertation
Full Text:: Fusarium Infection of Douglas-Fir Roots AN ABSTRACT OF THE THESIS OF James Herbert Graham, Jr. for the

ScholarsArchive@OSU

Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

Insects associated with black stain root disease of Douglas-fir in western Oregon

Environmental factors influencing the rate of spread of Phellinus weirii (Murr.) Gilbertson in young-growth Douglas-fir

Pathogenesis and intertree transmission of Verticicladiella wageneri in Douglas-fir (Pseudotsuga menziesii)

Degradation of phenolic components of Douglas-fir bark by fungi

Some silvicultural impacts of Phellinus weirii on a managed forest in the interior Coast Range of Oregon

Lichens on Douglas fir trees

Survival and pathogenicity of Phytophthora cinnamomi Rands in forest soils

Poria weirii root rot of Douglas-fir : survival of the pathogen and infection of the host

The role of ethylene in ectomycorrhiza formation and Fusarium infection of Douglas fir roots

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