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Creator:: Lewis, Katherine JoAnn
Abstract:: The root disease fungus Inonotus tomentosus, common in the old growth boreal forests of British Columbia, poses a threat to the health of second growth forests established on sites with a previous history of root disease. Colonized stumps occur in groups of 1 to 6; the groups are clumped within...
Resource Type:: Dissertation
Full Text:: British C9Ilumbia. . A Abstract approved: < Redacted for Privacy Dr. Everett M. Hansen The root disease

Creator:: Murray, Marion S.
Abstract:: In 1991 Pacific yew (Taxus brevifolia Nutt.) was reported as a new host for Phytophthora lateralis Tucker and Milbrath which is an aggressive root rot pathogen thought previously to be specific to Port-Orford-cedar. This study was designed to compare the pathogenicity of P. lateralis on the two hosts, and to...
Resource Type:: Masters Thesis
Full Text:: brevifolia Nutt.) to Phytophthora lateralis Abstract Approved: Everett M Hansen In 1991 Pacific yew

Creator:: Capitano, Bryan R.
Abstract:: Phaeocryptopus gaeumannii is a pathogenic fungus on Douglas-fir needles which has become a serious threat to timber production in the last decade along the Oregon coast This research was undertaken to describe the general biology and pathology of F. gaeumannii on Douglas-fir needles and how environmental variables affect fungal development....
Resource Type:: Masters Thesis
Full Text:: (Rhode) Petrak, Abstract approved: Everett M. Hansen Phaeocryptopus gaeumannii is a pathogenic fungus

Creator:: Trummer, Loreen M.
Abstract:: Hemlock dwarf mistletoe (Arceuthobium tsugense (Rosendahi) G.N. Jones subsp. tsugense (western hemlock race)) is the most important and widespread disease of old-growth western hemlock forests in the Pacific Northwest. Although heavy infection of dwarf mistletoe can significantly increase growth loss and mortality of host trees, the parasite is also considered...
Resource Type:: Masters Thesis

Creator:: Lattin, Peter D.
Abstract:: This study was conducted to investigate why root disease centers east of the Cascade crest tend to be larger in diameter and more abundant than their counterparts to the west, within subalpine forest stands of central Oregon. The trend in a 290 km² study area appeared opposite of what was...
Resource Type:: Masters Thesis

Creator:: Ferguson, Brennan Angus
Abstract:: The coniferous forests of the Pacific Northwest are affected by a variety of endemic fungal root pathogens. Forest disease surveys have noted the presence of two or more of these root pathogens infecting the same stump or root, and it has been suggested that these fungi may be interacting synergistically....
Resource Type:: Masters Thesis

Creator:: Dreisbach, Tina A.
Abstract:: Three species comprising the Phellinus pini complex have been documented in the USA, including P. pini, P. chrysoloma, and P. cancriformans. However, overlap in morphological features and ecological characteristics make species identification difficult. In addition, some researchers have questioned the existence of P. pini in the USA, suggesting instead that...
Resource Type:: Dissertation

Creator:: Lockman, Irene Blakey
Abstract:: Annosus root disease (Heterobasidion annosum (Fr.) Bref.) is causing notable conifer mortality in grand fir habitat types in central Idaho. The most significant mortality is occurring in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco.) trees of all age classes. This project was designed to study some aspects of the general biology of...
Resource Type:: Masters Thesis

Creator:: Bae, Hanhong
Abstract:: DNA markers that detect polymorphisms within and between two biological species of the coniferous laminated-root-rot fungus Phellinus weirii were developed and used to measure the amount and distribution of genetic variation. In a preliminary survey, total cellular DNA from 3 Douglas-fir-type isolates and 3 cedar-type isolates was digested with 12...
Resource Type:: Masters Thesis

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