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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

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

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

Creator:: Witcosky, Jeffrey John
Abstract:: Verticicladiella wageneri Kendrick is a vascular wilt pathogen of conifers, causing a black staining of colonized sapwood of roots and lower stem. In Douglas-fir, V. wageneri is intimately associated with insects. Hylastes nigrinus, Pissodes fasciatus, and Steremnuis carinatus are commonly associated with diseased hosts, carry inoculum of V. wageneri in...
Resource Type:: Dissertation

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

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Creator:: Hoefnagels, Mariëlle Henriette, 1965-
Abstract:: Fusarium spp. are among the most important pathogens of Douglas-fir (Pseudotsuga menziesii) seedlings in bareroot nurseries. Currently the most effective disease control method is soil fumigation with methyl bromide. As methyl bromide is phased out, however, other disease management strategies may become more important. We explored two alternative approaches to...
Resource Type:: Dissertation
Full Text:: Biology and control of Fusarium spp. on Douglas-fir

Detection, identification and control of Poria carbonica and other fungi in Douglas fir poles

Creator:: Ricard, Jacques Louis
Resource Type:: Dissertation
Full Text:: , IDENTIFICATION AND CONTROL OF PORIA CARBONICA AND OTHER FUNGI IN DOUGLAS FIR POLES Abstract approved (Major

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

Creator:: Dodds, Kevin J.
Abstract:: Three studies on Douglas-fir beetle (DFB), Dendroctonuspseudotsuae, were conducted to investigate its basic and applied biology. Studies included investigations into the spatial relationship of DFB infestations over multiple years and multiple landscapes, relationships between DFB brood adult lipid levels and position of development along the length of tree boles, and...
Resource Type:: Dissertation

ScholarsArchive@OSU

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

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

Degradation of phenolic components of Douglas-fir bark by fungi

The root insect-- black-stain root disease association in Douglas-fir : vector relationships and implications for forest management

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

Biology and control of Fusarium spp. on Douglas-fir (Pseudotsuga menziesii)

Detection, identification and control of Poria carbonica and other fungi in Douglas fir poles

Basic and applied studies on Douglas-fir beetle : spatial relationships of infestations, lipids and host habitat, and attraction distances of pheromone-baited traps

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