Index Catalog // ScholarsArchive@OSU

Early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast tolerance

Creator:: Temel, Fatih
Abstract:: The relationship between the level of Phaeocryptopus gaeumannii (Rohde) Petrak colonization and severity of Swiss needle cast (SNC) symptoms, the possibility of early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii [Mirb.] Franco) for SNC tolerance, and geographic variation in coastal Oregon with respect to SNC tolerance were investigated. Comparisons between...
Resource Type:: Dissertation

The effects of mechanical damage on residual coastal Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) following commercial thinning

Creator:: Kiser, James D.
Abstract:: Commercial thinning operations can result in damage to residual stems. A literature review revealed that little was known about the effects of residual logging wounds with regard to rotation-age commercial conifers, particularly Douglas-fir. An experiment to examine fungal colonization of Douglas-fir following logging damage showed that while damage was significant...
Resource Type:: Dissertation
Full Text:: : Histochemical and geometric alterations of sapwood in coastal Douglas-fir (Pseudotsuga menziesii [Mirbel

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:: , Oregon, during 1971 and 1972. A method of estimating cone and insect populations is presented. Factors

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:: disease increase, in natural V. wageneri infection centers in Douglas- fir plantations in Oregon and

Degradation of phenolic components of Douglas-fir bark by fungi

Creator:: Ross, William David, 1937-
Resource Type:: Dissertation
Full Text:: the location and general nature of cell wall lignin are described for Douglas-fir bark. Fungal

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:: of Douglas-fir seedlings rown in uninfested soil (left) and infested soil (rir:.t)at2O°C

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:: commercial forest land in the Douglas -fir subregion of the Pacific Northwest (Washington and Oregon

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:: ROLE OF ETHYLENE IN ECTOMYCORRHIZA FORMATION AND FUSARIUM INFECTION OF DOUGLAS-FIR ROOTS Redacted

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:: Douglas-fir seedling nurseries 4 Disease development 6 Fusarium inoculum from soil and seeds 7

ScholarsArchive@OSU

Early testing of Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) for Swiss needle cast tolerance

The effects of mechanical damage on residual coastal Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) following commercial thinning

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)

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