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Filtering by: Subject Rhododendrons -- Diseases and pests -- Oregon Remove constraint Subject: Rhododendrons -- Diseases and pests -- Oregon Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Language English [eng] Remove constraint Language: English [eng]

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Comparative epidemiology of Phytophthora diseases of Rhododendron

Creator:

Taylor, Clare Rebecca

Abstract:

Rhododendron species are host to many Phytophthora species and are an important crop in the nursery industry. The foliar epidemiology of twelve Phytophthora diseases on Rhododendron was studied in field and growth chamber experiments on two Rhododendron cultivars. The relative aggressiveness of Phytophthora spp. was assessed using disease incidence, severity,...

Resource Type:

Masters Thesis

Full Text:

, Rhododendron, Viburnum, and Camellia. Plant Disease 88:87-87. 48. Prospero S., Hansen E.M., Grünwald N.J
Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Creator:

Shay, Sarah D.

Abstract:

Phytophthora pini Leonian, recently re-established from P. citricola I, is a pathogen with a wide range of forest and nursery hosts. It causes foliar infections in horticultural nurseries in Oregon, where recirculating irrigation systems are common. Increased use of recirculating irrigation systems may contribute to disease caused by waterborne plant...

Resource Type:

Masters Thesis

Full Text:

disease is a serious threat to nursery production centers in Oregon and beyond, although the focus of
Pathways of infection of Phytophthora ramorum in rhododendron

Creator:

Lewis, Carrie D.

Abstract:

Phytophthora ramorum, a plant pathogen, is the cause of sudden oak death and ramorum blight and shoot die-back. It has a wide host range including many native forest species and common nursery plants. The lack of knowledge regarding infection biology of P. ramorum limits our understanding of its ecology and...

Resource Type:

Masters Thesis
The roles of Verticillium dahliae, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora and E. carotovora subsp. atroseptica in "early dying" disease of potatoes

Creator:

Kirkland, Marjorie Lynn

Abstract:

The primary cause of "early dying" disease of potatoes in Oregon is Verticillium dahliae; however, Colletotrichum atramentarium, Erwinia carotovora subsp. carotovora (Ecc) and E. carotovora subsp. atroseptica (Eca) are also commonly isolated from diseased plants. Therefore, field and greenhouse studies were initiated to determine the relative involvement of each pathogen,...

Resource Type:

Masters Thesis

Full Text:

Basin of Oregon that exhibited typical "early dying" disease symptoms in 1981. 10 Foliar chlorosis and
Brown rot of sweet cherry in western Oregon

Creator:

Gashaira, Bashir

Resource Type:

Dissertation

Full Text:

materially reduces the yield by causing blossom blight and fruit rot of stone fruit trees in western Oregon
Coniothyrium rose canker in Oregon

Creator:

Intrama, Siriphong

Abstract:

An isolate of Coniothyrium obtained from a stem canker on Nocturne rose from the Botany Department Farm, Corvallis, Oregon was studied with respect to morphological and cultural characters, pathogenicity and mineral nutrition. The hyphae of the isolate were smooth, septate and branched. The hyphal cells averaged 16.37 X 3.52 microns....

Resource Type:

Dissertation
Epidemiology of grape powdery mildew, Uncinula necator, in the Willamette Valley

Creator:

Hall, Tyrone W.

Abstract:

An important disease of Vitis vinifera production in Oregon and all other commercial growing regions is powdery mildew of grape, caused by the obligate fungal pathogen Uncinula necator (Schwein.) Burril. Grape production can be characterized as a long-term investment in the establishment and maintenance of the vineyard. Establishment times have...

Resource Type:

Masters Thesis

Full Text:

. Mahaffee An important disease of Vitis vinifera production in Oregon and all other commercial growing
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:

assistance with setting up, maintaining, and taking down the hop fields. I am grateful to the Oregon Hop
An investigation of cherry gummosis

Creator:

Griffin, F. L. (Frederick Llewellyn)

Resource Type:

Masters Thesis

Full Text:

. Culture and Economic Importance. 5. Diseases. C. THE DISEASE. 1. Gummosis 2. History and Distribution
Response to fenamiphos, extraction techniques and population dynamics of Pratylenchus penetrans on western Oregon red raspberry

Creator:

Lolas, Mauricio

Abstract:

The effects of fenamiphos on soil and root populations of Pratylenchus penetrans were evaluated in four red raspberry cv. Willamette fields in Northwestern Oregon. Field 1 was a silty clay loam with 53% organic matter (OM). Field 2 and 3 were silty loam soils with 3.25 and 2.55% OM, respectively...

Resource Type:

Masters Thesis

Full Text:

FOUR OREGON SOILS 34 INTRODUCTION 34 MATERIALS AND METHODS 36 RESULTS 40 DISCUSSION 49 LITERATURE

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Academic Affiliation

Botany and Plant Pathology[remove]36

Advisor

Hansen, Everett M.7
Ingham, Russell E.3
Ocamb, Cynthia M.3
Parke, Jennifer L.3
Powelson, Mary L.3
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1911 to 2017

View distribution

Unknown 1

Committee Member

Johnson, Kenneth4
Hansen, Everett3
Parke, Jennifer3
Johnson, Kenneth B.2
Parke, Jennifer L.2
more Committee Members »

Creator

Bienapfl, John C.1
Bomberger, Rachel A.1
Boudreau, Mark Alan, 1958 1
Calabro, Jill M.1
Capitano, Bryan R.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1911 to 2016

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Decade

2010-201911
2000-200912
1990-19997
1980-19894
1960-19691
1910-19191

Degree Field

Botany and Plant Pathology32
Plant Pathology2
Botany1

Degree Level

Master's23
Doctoral12

Degree Name

Master of Science (M.S.)23
Doctor of Philosophy (Ph.D.)12

File Format

application/pdf6

Language

English [eng][remove]36

License

All rights reserved18

Location

Oregon, Oregon, United States, (Administrative Boundary)1

Non-Academic Affiliation

Oregon State University. Graduate School35
Oregon State University. Agricultural Experiment Station1

Peer Reviewed

No32

Resource Type

Masters Thesis23
Dissertation12
Technical Report1

Rights Statement

In Copyright24
Copyright Not Evaluated11
No Copyright - United States1

Subject

Rhododendrons -- Diseases and pests3
Cherry -- Diseases and pests -- Oregon2
Douglas fir -- Diseases and pests -- Oregon2
Fusarium diseases of plants -- Oregon -- Willamette River Valley2
Fusarium oxysporum -- Oregon -- Willamette River Valley2
more Subjects »

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