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

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:: Stain Root Disease of Douglas-fir in Western Oregon. Abstract approved: Redacted for Privacy ee C

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:: damaging in pure Douglas-fir stands west of the crest of the Cascade range in Oregon and Washington and

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

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

Conk rot of old-growth Douglas-fir in Western Oregon

Creator:: Boyce, John Shaw and Wagg, J. W. Bruce
Resource Type:: Technical Report

Properties of white-pocket douglas-fir lumber

Creator:: Wood, Lyman Wentsch, 1899- and Forest Products Laboratory (U.S.)
Abstract:: Information reviewed and reaffirmed October 1960.
Resource Type:: Technical Report
Full Text:: PROPER-FEES OF WHITE-POCKET DOUGLAS-FIR *UMBER Information Reviewed and Reaffirmed October 1960 No

Lichens on Douglas fir trees

Creator:: Edin, Nils
Resource Type:: Undergraduate Thesis
Full Text:: C1asification of Douglas-fir Trees b the Amount and. Position of Lichen rowing Upon Them . . . 15 Comparative

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

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

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

Conk rot of old-growth Douglas-fir in Western Oregon

Properties of white-pocket douglas-fir lumber

Lichens on Douglas fir trees

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