Index Catalog // ScholarsArchive@OSU

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Creator:: Wright, Carolyn E.
Abstract:: Astragalus diaphanus is a rare plant endemic to the John Day River drainage of north-central Oregon. This species has several interesting features, including the dimorphism of its fruit and its geographical isolation from the two nearest taxonomically related species, which occur in Colorado. This study addressed the species' distribution and...
Resource Type:: Masters Thesis
Full Text:: 14NE *Wright & Gross 1984 Squaw Creek 11S 25E 30 Wright & Gross 1984 VAR. DIURNUS Grant County: D

Laboratory studies of bacteriophagous nematodes as potential vectors of insect pathogens

Creator:: Wright, Billie Dean
Abstract:: Three species of bacteriophagous nematodes, Pristionchus lheritieri (Maupas) Paramanov, Pelodera chitwoodi (Bassen) Dougherty and Rhabditis sp. were studied to determine their potential roles as vectors of selected insect pathogens, Bacillus thuringiensis Berliner, Beauveria bassiana (Balsamo) Vuillemin, Metarrhizium anisopliae (Metchnikoff) Sorokin and a nuclear polyhedrosis virus of Trichoplusia ni Hubner. Chlorine...
Resource Type:: Dissertation
Full Text:: potential vectors of insect pathogens AN ABSTRACT OF THE THESIS OF BILLIE DEAN WRIGHT for the degree of

Population Density and Phenology of Tetranychus urticae (Acari: Tetranychidae) in Hop is Linked to the Timing of Sulfur Applications

Creator:: Woods, J. L., Dreves, A. J., Fisher, Glenn C., James, David G., Wright, Larry C., and Gent, D. H.
Abstract:: The twospotted spider mite, Tetranychus urticae Koch, is a worldwide pest of numerous agronomic and horticultural plants. Sulfur fungicides are known to induce outbreaks of this pest on several crops, although mechanisms associated with sulfur-induced mite outbreaks are largely unknown. Studies were conducted during 2007–2009 in Oregon and Washington hop...
Resource Type:: Article
Full Text:: . DREVES,1 G. C. FISHER,1 D. G. JAMES,2 L. C. WRIGHT,2 AND D. H. GENT3 Environ. Entomol. 41(3): 621Ð635

Light-induced absorbance changes and partial reactions of photosynthesis in mutants of Scenedesmus obliquus, strain D₃

Creator:: Pratt, Lee Herbert
Abstract:: Partial reactions of photosynthesis were examined in the wild type strain and six photosynthetic mutants (8, 11, 26, 40, 50, a') of Scenedesmus obliquus, strain D₃. A reproducible procedure for the isolation of active chloroplast fragments from Scenedesmus was developed. Several chloroplast reactions were examined, as well as two in...
Resource Type:: Dissertation
Full Text:: for the (Name) Ph. D. (Degree) in Botany (Plant Physiology) presented on August 10, 1967 (Major

Survival and dispersal of Pseus[i.e. d]omonas syringae in a maple nursery and pear orchard

Creator:: Malvick, Dean K.
Resource Type:: Masters Thesis
Full Text:: Survival and dispersal of Pseus[i.e. d]omonas syringae in

Studies on canker in European filbert caused by Anisogramma anomala

Creator:: Postman, Joseph D.
Abstract:: Anisogramma anomala causes a stem canker of filberts, Corylus avellana. This disease became a threat to the main U.S. filbert growing region when it was introduced into the Pacific Northwest around 1968. Various methods of artificially inoculating filbert trees and seeds were explored. Less than 1% of potted filbert trees...
Resource Type:: Masters Thesis
Full Text:: anomala AN ABSTRACT OF THE THESIS OF Joseph D. Postman for the degree of Master of Science in Botany

Factors affecting the inoculum potential of VA and ectomycorrhizal fungi in forest soils of southwest Oregon and northern California

Creator:: Parke, Jennifer Lee
Resource Type:: Dissertation
Full Text:: Oregon coniferous forests. Ecology 59, 799-809. MEYER-SCHOENEBERGER, M. M. & PERRY, D. A. (1982). The

Silviculture Impacts and Population Genomics of Coniferiporia sulphurascens, the Causal Agent of Laminated Root Rot

Creator:: McMurtrey, Shawn
Abstract:: Within the Pacific Northwest, USA, root diseases of conifers are a major forest health concern. These diseases are primarily caused by basidiomycete fungi. These fungal associates play a vital role in carbon sequestration but also have a significant negative economic impact within the timber industry. As a result, research on...
Resource Type:: Masters Thesis
Full Text:: , Forest Service, Pacific Southwest Station 3-8. Goss, E. M., Larsen, M., Chastagner, G. A., Givens, D

Comparison of Phellinus weirdi root rot damage in a 60-year-old Douglas-fir (Pseudotsuga menziesii) stand with the damage in the preceding old-growth stand

Creator:: Tkacz, Borys M.
Abstract:: Laminated root rot of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) caused by the fungus Phellinus weirii (Murr.)Gilbertson was studied in two successive stands in the Oregon Coast Range. Damage due to the disease in a 60-year-old second-growth stand was compared with incidence in the preceding 300-year-old stand on the same site....
Resource Type:: Masters Thesis
Full Text:: for Privacy Everett M. Hansen Laminated root rot of Douglas-fir (Pseudotsuga menziesii (Mirb

The mycorrhizal associations of western hemlock

Creator:: Kropp, Bradley Ray
Abstract:: Two objectives of this research were to identify fungi which are mycorrhizal with western hemlock and to examine the ecology of hemlock mycorrhizal fungi indigenous to outplanting sites. Another objective was to evaluate the effectiveness of mycorrhizal inoculation in improving the performance of outplanted hemlock seedlings. A list of over...
Resource Type:: Dissertation
Full Text:: approved: Dr. James M. Trappe Two objectives of this research were to identify fungi which are

ScholarsArchive@OSU

A systematic and ecological study of Astragalus diaphanus (Fabaceae)

Laboratory studies of bacteriophagous nematodes as potential vectors of insect pathogens

Population Density and Phenology of Tetranychus urticae (Acari: Tetranychidae) in Hop is Linked to the Timing of Sulfur Applications

Light-induced absorbance changes and partial reactions of photosynthesis in mutants of Scenedesmus obliquus, strain D₃

Survival and dispersal of Pseus[i.e. d]omonas syringae in a maple nursery and pear orchard

Studies on canker in European filbert caused by Anisogramma anomala

Factors affecting the inoculum potential of VA and ectomycorrhizal fungi in forest soils of southwest Oregon and northern California

Silviculture Impacts and Population Genomics of Coniferiporia sulphurascens, the Causal Agent of Laminated Root Rot

Comparison of Phellinus weirdi root rot damage in a 60-year-old Douglas-fir (Pseudotsuga menziesii) stand with the damage in the preceding old-growth stand

The mycorrhizal associations of western hemlock

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