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Filtering by: Alternative title ssim Frequencies of daily extremes in temperature at Burns, Oregon Remove constraint Alternative title ssim: Frequencies of daily extremes in temperature at Burns, Oregon Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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Hop cone tip blight : a new disease in the Pacific Northwest

Creator:

Bienapfl, John C.

Abstract:

A necrosis at the tip of cones was observed on hop (Humulus lupulus), cultivar "Nugget", grown in Oregon in the early 1990's. Fusarium sambucinum and F. avenaceum were recovered from symptomatic cones in 1998 and preliminary inoculation experiments suggested both Fusarium species could cause hop cone necrosis. Studies were carried...

Resource Type:

Masters Thesis

Full Text:

tip of cones was observed on hop (Humulus lupulus), cultivar tNugget', grown in Oregon in the early
Comparison of the water relations characteristics of woody plants in western Oregon

Creator:

Davis, Kent J.

Abstract:

I studied the water relations traits, twig conductivity, C'3 isotopic composition, and wood density of three conifer and five angiosperm species in western Oregon. This study took place from spring 2002 to fall 2003 on four sites. Species were selected to represent the diversity of drought tolerance of woody plants...

Resource Type:

Masters Thesis

Full Text:

Water Relations Characteristics of Woody Plants in Western Oregon. Abstract approved Donald B.Zobe
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:

December 5, 2011. Title: The Epidemiology of Sudden Oak Death in Oregon Forests Abstract approved
Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed

Creator:

Berryman, Shanti D.

Abstract:

This dissertation describes patterns in epiphytic macrolichen community composition, diversity, and biomass across various stand types in the Blue River watershed of western Oregon. It first examines the relative importance of ecological factors such as stand age, remnant tree retention, and topography to lichen communities in the landscape. It then...

Resource Type:

Dissertation

Full Text:

and Lichen Community Data in the Central Cascade Forests of Western Oregon, USA
Biological Soil Crusts of the Great Basin : An Examination of their Distribution, Recovery from Disturbance and Restoration

Creator:

Condon, Lea A.

Abstract:

We are at risk of losing the sagebrush steppe in the floristic Great Basin to the invasion of Bromus tectorum L., cheatgrass. The floristic Great Basin includes the Central Basin and Range, the Northern Basin and Range, and the Snake River Plain. The Great Basin receives most of its precipitation...

Resource Type:

Dissertation

Full Text:

: ______________________________________________________ David A. Pyke Bruce McCune We are at risk of losing the sagebrush steppe in the
Contrasting Epiphytic and Ground Layer Macrolichen Communities along the Coast-to-inland Climatic Gradient in Oregon

Creator:

Glauser, Abby L.

Abstract:

Cyanolichens, lichens with a cyanobacterial photobiont, benefit our ecosystems by the fixation of atmospheric nitrogen into a usable form for other organisms. They are highly sensitive to air pollution and require liquid water for photosynthesis. Many cyanolichen species frequently occur on the ground in the Pacific Northwest, however, most macrolichen...

Resource Type:

Masters Thesis

Full Text:

next in the wetter, western half of Oregon, as do the epiphytic communities. Ground communities
Dynamics of Zymoseptoria tritici Fungicide Resistance in the Willamette Valley of Oregon

Creator:

Hagerty, Christina H.

Abstract:

The development of resistance to multiple fungicide classes is currently limiting disease management options for many pathogens, while the discovery of new fungicide classes has become less frequent. To address this pressing issue, a three-part study with different layers of complexity, objectives, and experimental approaches was conducted using the model...

Resource Type:

Dissertation

Full Text:

. Aerial view of the experimental design at the Oregon State University Botany Farm in Corvallis, Oregon
Responses and relationships among Fusarium species, sweet corn, and western spotted cucumber beetles

Creator:

Miller, Nathan L. (Nathan Louis)

Abstract:

Sweet corn (Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s. Studies were done to determine if there is a relationship between ear weight and several disease parameters including necrotic crowns or stalk nodes, nodal root rot, radicle root rot, and sub-crown...

Resource Type:

Dissertation

Full Text:

(Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s
Distribution of understory species in relation to maximum and minimum tree influence in the montane forest of the Central Oregon Cascades

Creator:

Robinson, Andrew Frederick, Jr.

Abstract:

Twenty sites of uniform topography and soil were select ed in the montane forest found on the East flank of the Central Oregon Cascades. These sites were located along a vegetational gradient composed of five plant communities: Abies/Pachistima, Pinus/Ceanothus, Pinus Arctostaphylos-Purshia, Pinus/Purshia/Festuca, and Juniperus Festuca. An attempt was made to...

Resource Type:

Dissertation

Full Text:

narrowest at insolation or plot loca- tion extremes; and in the central part of the gradient where
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

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Academic Affiliation

Botany and Plant Pathology36
Wood Science and Engineering1

Advisor

Zobel, Donald B.5
Hansen, Everett M.4
Mccune, Bruce3
Chilcote, W. W.2
Liston, Aaron2
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1964 to 2024

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Committee Member

Cromack, Kermit2
Cronn, Richard C.2
Appleby, Arnold1
Bailey, John1
Bailey, John D.1
more Committee Members »

Creator

Bair, Zolton J.1
Berryman, Shanti D.1
Bienapfl, John C.1
Brown, Kevin R.1
Condon, Lea A.1
more Creators »

Contributor

Cronn, Richard C.2
Dibello, Patrick L.1
Dupen, Elena N.1
Finch, Kristen N.1
Gonda, Kathryn F.1
more Contributors »

Date

Date range begin – Date range end

Current results range from 1963 to 2023

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Decade

2020-20294
2010-201912
2000-20096
1990-19992
1980-19896
1970-19792
1960-19694

Degree Field

Botany and Plant Pathology[remove]36
Wood Science1

Degree Level

Doctoral27
Master's9

Degree Name

Doctor of Philosophy (Ph.D.)27
Master of Science (M.S.)9

File Format

application/pdf1

Language

English [eng]36

License

All rights reserved17
Attribution-NonCommercial 4.0 (CC BY-NC 4.0)1

Location

Willamette Valley, Oregon, United States, (Hypsographic)1

Non-Academic Affiliation

Oregon State University. Graduate School29

Peer Reviewed

No35

Resource Type

Dissertation27
Masters Thesis9

Rights Statement

In Copyright20
Copyright Not Evaluated16

Subject

Cheatgrass brome -- Great Basin2
Alder -- Diseases and pests -- Oregon, Western1
Ants -- Oregon -- Nests1
Aquatic animals -- Effect of water pollution on1
Astragalus (Plants) -- North America -- Genetics1
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