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Filtering by: Alternative title ssim Range plant leaflet 66 Remove constraint Alternative title ssim: Range plant leaflet 66 Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Advisor Hansen, Everett M. Remove constraint Advisor: Hansen, Everett M.

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Port-Orford-cedar and Phytophthora lateralis : grafting and heritability of resistance in the host, and variation in the pathogen

Creator:

McWilliams, Michael G.

Abstract:

Port-Orford-cedar (Chamaecyparis lawsoniana) is a forest tree native to a small area of Oregon and California. A root disease caused by Phytophthora lateralis causes widespread mortality of Port-Orford-cedar. This dissertation examines three important elements of the Port-Orford-cedar P. lateralis pathosystem related to breeding for disease resistance: use of resistant rootstocks...

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Dissertation

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Michael G. McWilliams for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on
Pathogenicity of Phytophthora species from Oregon waterways

Creator:

Navarro, Sarah M.

Abstract:

Described as one of the most destructive pathogens of agricultural crops and forest trees, Phytophthora is a genus of microorganisms containing over 100 known species. Phytophthora alni has caused collar and root disease in alders throughout Europe and a form of the species has recently been isolated in North America....

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Masters Thesis

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ecological systems, where they can cause severe blight, damping off, or dieback of a broad range of plant
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...

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Dissertation

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the degree of Doctor of Philosophy in Botany and Plant Pathology presented on April 19, 1984 Title
Trichoderma spp. : distribution in stumps infested with Phellinus weirii and growth and antagonism in vitro

Creator:

Goldfarb, Barry

Abstract:

To determine which isolates will most rapidly replace Phellinus weirii in stumps and roots, Trichoderma spp. were isolated from P. weirii-infested stumps and roots, identified, and examined for growth rates and lethal effects on P. weirii in vitro. Phellinus weirii-infested Douglas-fir stumps and stump roots were sampled for microorganisms by...

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Masters Thesis

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degree of Master of Science in Botany and Plant Pathology presented on April 22, 1986. Title
Epidemiology and population biology of Inonotus tomentosus as a pathogen of forests of British Columbia

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...

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Dissertation

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for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on April 10. 1990
The infection and colonization of Douglas-fir needles by the Swiss needle cast pathogen, Phaeocryptopus gaeumannii (Rhode) Petrak

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....

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Masters Thesis

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of Master of Science in Botaiiy and Plant Patholcgy presented on May 25. 1999. Title: The Infection
Phylogenetics, population genetics, molecular epidemiology, and pathogenicity of the Douglas-fir Swiss needle cast pathogen Phaeocryptopus gaeumannii

Creator:

Winton, Loretta M.

Abstract:

A hierarchical series of studies, based mainly on molecular data, was conducted to elucidate the life history of the Douglas-fir Swiss needle cast pathogen Phaeocryptopus gaeumannii at macro- and micro-evolutionary scales. This information was then utilized to design and evaluate molecular diagnostic tools for use in studies on the epidemiology...

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Dissertation

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degree of Doctor of Philosophy in Botany and Plant Pathology presented on May 31, 2001. Title
Susceptibility of Pacific yew (Taxus brevifolia Nutt.) to Phytophthora lateralis

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:

in Plant Pathology presented on April 10, 1995. Title: Susceptibility of Pacific Yew (Taxus
Susceptibility of golden chinquapin (Chrysolepis chrysophylla) to Phytophthora cambivora

Creator:

Saavedra, Angel Luis

Abstract:

In early 2000, unusual mortality of a native North American tree, golden chinquapin, was reported by the USDA-Forest Service. Dying trees exhibited girdling cankers in the inner bark of the lower bole, branch flagging and defoliation. Isolations from necrotic tissues and soil associated with diseased or killed trees yielded Phytophthora...

Resource Type:

Masters Thesis

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Luis Saavedra for the degree of Master of Science in Botany and Plant Pathology presented on March 29
The epidemiology of sudden oak death in Oregon forests

Creator:

Peterson, Ebba K.

Abstract:

The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in't Veld), causal agent of Sudden Oak Death (SOD) of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus syn. Lithocarpus densiflorus), is established in coastal forests of the western United States. Since the discovery of SOD in the Douglas-fir / tanoak forests of...

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Dissertation

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Ebba K. Peterson for the degree of Doctor of Philosophy in Botany and Plant Pathology presented on

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Academic Affiliation

Botany and Plant Pathology[remove]20
Wood Science and Engineering1

Advisor

Hansen, Everett M.[remove]20
Morrell, Jeffrey J.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1980 to 2015

View distribution

Committee Member

Parke, Jennifer L.2
Shaw, David C.2
Beatty, Joseph J.1
Bradshaw, Gay1
Copes, Don1
more Committee Members »

Creator

Capitano, Bryan R.1
Goldfarb, Barry1
Hamm, Philip B.1
Hennon, Paul E.1
Hennon, Paul Edward1
more Creators »

Date

Date range begin – Date range end

Current results range from 1979 to 2014

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Decade

2010-20195
2000-20095
1990-19993
1980-19896
1970-19791

Degree Field

Botany and Plant Pathology16
Botany3
Plant Pathology1
Wood Science1

Degree Level

Master's12
Doctoral8

Degree Name

Master of Science (M.S.)12
Doctor of Philosophy (Ph.D.)8

File Format

application/pdf1

Language

English [eng]20

License

All rights reserved7

Non-Academic Affiliation

Oregon State University. Graduate School20

Peer Reviewed

No20

Resource Type

Masters Thesis12
Dissertation8

Rights Statement

Copyright Not Evaluated12
In Copyright8

Subject

Douglas fir2
Douglas fir -- Diseases and pests2
Phytophthora -- Oregon, Western2
Alder -- Diseases and pests -- Oregon, Western1
Blister rust -- Oregon1
more Subjects »

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