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Filtering by: Subject Western larch -- Diseases and pests -- Idaho Remove constraint Subject: Western larch -- Diseases and pests -- Idaho Degree Level Doctoral Remove constraint Degree Level: Doctoral

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The influence of pre-harvest killing of western hemlock on subsequent stump invasion by Fomes annosus

Creator:

Laird, Peter Paul

Abstract:

This study concerns the effect of pre-harvest killing of commercial sized, forty year old western hemlock (Tsuga heterophylla (Raf.) Sarg.) on subsequent stump infection by Fomes annosus (Fr.) Karst. Further evaluations were made on tree drying, loosening of bark, wood deterioration and rate of crown and cambial death. Findings on...

Resource Type:

Dissertation
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:

another Phytophthora species could be causing disease in western Oregon, and that this disease would go
Sampling methods and injury thresholds for western spotted cucumber beetle in snap beans

Creator:

Weinzierl, Richard Alan

Resource Type:

Dissertation

Full Text:

Sampling Methods and Injury Thresholds for Western Spotted
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

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the Netherlands in 2001 (Werres et al. 2001), and was attributed to the decline of western American
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

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. Studies were done to determine if there is a relationship between ear weight and several disease

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Academic Affiliation

Botany and Plant Pathology3
Entomology1
Forest Management1

Advisor

Hansen, Everett M.2
Berry, Ralph E.1
Newton, Michael1
Ocamb, Cynthia1

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1971 to 2014

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Committee Member

Braunworth, Bill1
Fisher, Glenn1
Fowler, John1
Grunwald, Niklaus J.1
Hall, Jean A.1
more Committee Members »

Creator

Laird, Peter Paul1
Miller, Nathan L. (Nathan Louis)1
Peterson, Ebba K.1
Sims, Laura L.1
Weinzierl, Richard Alan1

Date

Date range begin – Date range end

Current results range from 1970 to 2014

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Decade

2010-20192
2000-20091
1980-19891
1970-19791

Degree Field

Botany and Plant Pathology3
Entomology1
Forest Management1

Degree Level

Doctoral[remove]5

Degree Name

Doctor of Philosophy (Ph.D.)5

File Format

application/pdf1

Language

English [eng]5

License

All rights reserved3

Non-Academic Affiliation

Oregon State University. Graduate School5

Peer Reviewed

No5

Resource Type

Dissertation5

Rights Statement

In Copyright3
Copyright Not Evaluated2

Subject

Alder -- Diseases and pests -- Oregon, Western1
Fusarium -- Oregon -- Willamette River Valley1
Fusarium diseases of plants -- Oregon -- Willamette River Valley1
Fusarium oxysporum -- Oregon -- Willamette River Valley1
Kidney bean -- Diseases and pests1
more Subjects »

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