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Filtering by: Alternative title ssim Forest statistics for County, Oregon Remove constraint Alternative title ssim: Forest statistics for County, Oregon Advisor Hansen, Everett M. Remove constraint Advisor: Hansen, Everett M. Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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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...

Resource Type:

Dissertation

Full Text:

Oregon State University in partial fulfillment of the requirements for the degree of
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...

Resource Type:

Dissertation

Full Text:

to "Wimp Tours" Acknowledgements Financial support for this thesis was provided by the Forest
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....

Resource Type:

Masters Thesis

Full Text:

counties and Curry County, Oregon. P. ramorum was introduced into the forest of California in the mid
Phytosanitation of Douglas-fir (Pseudotsuga menziesii) logs to mitigate the risk of artificially disseminating Phytophthora ramorum within the global trade of timber

Creator:

Hulbert, Joseph M.

Abstract:

Phytophthora ramorum is a plant pathogen that was accidentally introduced to the United States. This invasive microorganism has killed over a million trees in California and Oregon, and continues to spread to new areas. Diseased areas have been nationally quarantined to prevent further spread and more than ninety countries include...

Resource Type:

Masters Thesis

Full Text:

Oregon State University in partial fulfillment of the requirements for the degree of
Phytophthora species and riparian alder tree damage in western Oregon

Creator:

Sims, Laura L.

Abstract:

The genus Phytophthora contains some of the most destructive pathogens of forest trees, including the most destructive pathogen of alder in recent times, Phytophthora alni. Alder trees were reported to be suffering from canopy dieback in riparian ecosystems in western Oregon, which prompted a survey of alder health and monitoring...

Resource Type:

Dissertation

Full Text:

monitoring for P. alni. In 2010 surveys in western Oregon riparian ecosystems were initiated to gather
Distribution and prediction of Swiss needle cast of Douglas-fir in coastal Oregon

Creator:

Rosso, Pablo H.

Abstract:

This study was directed to improve our understanding of the ecology of Swiss needle cast (SNC) of Douglas-fir, a disease that produces extensive damage to forests and plantation in the coastal region of Oregon and Washington. A disease prediction model for the coastal area of Oregon was built by establishing...

Resource Type:

Dissertation

Full Text:

-fir in coastal Oregon AN ABSTRACT OF THE DISSERTATION OF Pablo H. Rosso for the degree of Doctor of
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

Full Text:

tests showed that both mating types, Al and A2, of this species were present in forest soil in Oregon
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....

Resource Type:

Masters Thesis

Full Text:

submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master
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...

Resource Type:

Masters Thesis

Full Text:

A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the
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:

April 19, 1984 Commencement June 3, 1984 APPROVED: Redacted for Privacy Professor of Forest

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Academic Affiliation

Botany and Plant Pathology13
Wood Science and Engineering1

Advisor

Hansen, Everett M.[remove]13
Morrell, Jeffrey J.1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1984 to 2015

View distribution

Committee Member

Parke, Jennifer L.2
Stone, Jeffrey2
Bradshaw, Gay1
Cromack, Kermit1
Fassnacht, Karin1
more Committee Members »

Creator

Capitano, Bryan R.1
Goldfarb, Barry1
Hessburg, Paul F.1
Hulbert, Joseph M.1
Lewis, Katherine Joann1
more Creators »

Date

Date range begin – Date range end

Current results range from 1984 to 2014

View distribution

Decade

2010-20194
2000-20095
1990-19992
1980-19892

Degree Field

Botany and Plant Pathology[remove]13
Wood Science1

Degree Level

Doctoral7
Master's6

Degree Name

Doctor of Philosophy (Ph.D.)7
Master of Science (M.S.)6

File Format

application/pdf1

Language

English [eng]13

License

All rights reserved6

Non-Academic Affiliation

Oregon State University. Graduate School13

Peer Reviewed

No13

Resource Type

Dissertation7
Masters Thesis6

Rights Statement

Copyright Not Evaluated7
In Copyright6

Subject

Douglas fir -- Diseases and pests2
Phytophthora -- Oregon, Western2
Alder -- Diseases and pests -- Oregon, Western1
Conifers -- Diseases and pests -- British Columbia1
Douglas fir -- Diseases and pests -- Oregon1
more Subjects »

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