Index Catalog // ScholarsArchive@OSU

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:: ). Powdery mildew is an important disease of grape production in Oregon and all other commercial growing

Double-stranded RNA isolated from grapevine affected by grapevine stem-pitting disease

Creator:: Walter, Michael H.
Abstract:: Nucleic acid extracted from dormant cane phloem of grapevines affected by grapevine stem-pitting disease (SP) formed a high molecular weight (MW) band on 1.0% and 0.8% agarose gels. The band was unique to diseased vines. Other bands appeared from samples of both diseased and virus-free vines, but did not associate...
Resource Type:: Masters Thesis
Full Text:: INTRODUCTION AND LITERATURE REVIEW 1 Grape Industry Problems 1 Disease Description 8 Virus Particle Research 14

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:: improved nematode control strategies and integrated pest management practices. Therefore, there is a need

Population dynamics, extraction, and response to nematicide of three plant parasitic nematodes on peppermint (mentha piperita L.)

Creator:: Merrifield, Kathryn J.
Abstract:: The efficiencies of wet sieving/sucrose centrifugation (WS/SC) recovery of Pratylenchus penetrans (59 %), Paratylenchus sp., (80 %), and Criconemella xenoplax (66 %) were established. Baermann funnels (BF) recovered significantly more P. penetrans (p = 0.01) and significantly less (p = 0.01) C. xenoplax than did WS/SC. While densities of P....
Resource Type:: Masters Thesis
Full Text:: Crowson and Sons and John Hentze are deeply appreciated. Financial support from the Oregon Essential Oil

Biology of sweet cherry powdery mildew

Creator:: Calabro, Jill M.
Abstract:: The Pacific Northwest has become one of the nation’s premier sweet cherry, Prunus avium, production areas. As production of sweet cherries has flourished in Oregon and Washington, so has powdery mildew, caused by the fungus Podosphaera clandestina, which infects both foliage and fruit causing severe economic damage to growers. Sweet...
Resource Type:: Dissertation
Full Text:: 1.3 Disease cycle of sweet cherry powdery mildew………...8 1.4 Disease forecasting and control

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:: order to control brown rot disease effectively, the causal organism and the disease cycle must be

Overwintering survival of stem rust on perennial ryegrass : construction of a simulation model, and effects of the mycoparasite Sphaerellopisis filum

Creator:: Gordon, Tyler C.
Abstract:: Stem rust, caused by the fungus Puccinia graminis subsp. graminicola, can cause yield reductions exceeding 90% on perennial ryegrass (Lolium perenne L.) crops grown for seed if not treated with fungicide in the spring. There is evidence that late-spring stem rust epidemics are initiated by populations that survived the winter....
Resource Type:: Masters Thesis
Full Text:: . filum infected stem rust uredinia in the glasshouse and field under conditions typical of an Oregon

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:: (Kaulf.) C. Presl), Oregon grape (Berberis diversifolia Pursh), and salal (Gaultheria shallon Pursh

Studies on the etiology and epidemiology of bull's eye rot of pears

Creator:: Henriquez, Jose Luis, 1961-
Abstract:: The objective of this dissertation is to introduce low-cost processing methods for the fabrication of ZnO transparent thin-film transistors (TTFTs). A novel method for depositing ZnO body layers via spin-coating of a zinc nitrate-based spin solution is presented. The processing conditions of spin-coated ZnO are optimized to produce continuous and...
Resource Type:: Dissertation
Full Text:: Columbia, Oregon and Washington. The disease is also important in Europe; in Germany bull's eye rot is

ScholarsArchive@OSU

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

Double-stranded RNA isolated from grapevine affected by grapevine stem-pitting disease

Response to fenamiphos, extraction techniques and population dynamics of Pratylenchus penetrans on western Oregon red raspberry

Population dynamics, extraction, and response to nematicide of three plant parasitic nematodes on peppermint (mentha piperita L.)

Biology of sweet cherry powdery mildew

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

Brown rot of sweet cherry in western Oregon

Overwintering survival of stem rust on perennial ryegrass : construction of a simulation model, and effects of the mycoparasite Sphaerellopisis filum

The epidemiology of sudden oak death in Oregon forests

Studies on the etiology and epidemiology of bull's eye rot of pears

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