Index Catalog // ScholarsArchive@OSU

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Creator:: Brazil, Jessie A.
Abstract:: Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium and Dickeya species, is among the most common and destructive potato diseases in the United States. These pathogens cause a variety of vascular wilts, and in potato cause a disease complex that includes tuber soft rot, blackleg, aerial stem rot,...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Kenneth Frost Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium

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:: .USDA Forest Service, Pacific Southwest Research Station. 378 p. Adams, G. C., Catal, M., Trummer, L

Interrelationship of wheat cultivar mixtures, stripe rust and yield

Creator:: Akanda, Shamsul I.
Resource Type:: Dissertation
Full Text:: , Stripe Rust and Yield Abstract approved: Christopher C. Mundt Four club wheat (Triticum aestivum

Host and Pathogen Genetics in the Sharp Eyespot Disease of Wheat

Creator:: Liu, Jiang
Abstract:: Wheat sharp eyespot (SES), caused by the soil-borne fungus Rhizoctonia cerealis is a common stem disease of wheat globally. The disease caused a severe and extensive epidemic throughout the Willamette Valley of Oregon in 2014 and has remained one of the most important wheat diseases in this region. However, litte...
Resource Type:: Dissertation
Full Text:: :_______________________________________________________________ Christopher C. Mundt Wheat sharp eyespot (SES), caused by the soil-borne fungus

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Creator:: Lloyd, Deanna M.
Abstract:: In the midst of double-digit growth in market demand for organic products, there is a lag in the growth of certified organic production in the United States. This thesis investigated the motivations and barriers farmers face when making the transition to organic agriculture. Three distinct organic farmer typologies were identified:...
Resource Type:: Masters Thesis

Ascospore viability and dispersal from pruned branches infected with Anisogramma anomala

Creator:: Heckert, Stephanie
Abstract:: Viability and dispersal of ascospores of Anisogramma anomala, the cause of eastern filbert blight (EFB) on European hazelnut, from diseased branches pruned from trees were measured. In each of two years, branches bearing stromata of A. anomala were cut in mid-December and compared to branches cut near budbreak in March,...
Resource Type:: Masters Thesis
Full Text:: . 66 B.1 A layout of spore traps in Sections C or D for the 2010 season at the Oregon State

Phylogenetic relationships of the bumblebees (Apidae: Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences

Creator:: Pongprasert, Weerathep
Resource Type:: Dissertation
Full Text:: , Dr. John Lattin and Dr. Kenneth B. Johnson, for their advice and assistance during my study. I am

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Creator:: Dunnell, Kelsey Liann
Abstract:: Host-parasite interactions between the pathogen, Sphaerulina musiva, and its host, Populus spp., were examined in a series of studies. In the first study, variation in resistance of Populus nigra from 7 locations in Europe was differentiated based on the parameters cankers per cm and disease severity score. The analysis evaluated...
Resource Type:: Dissertation
Full Text:: my committee members at Oregon State University: Dr. Thomas Wolpert, Dr. Kenneth Johnson, Dr

Post-dispersal seed fates in a Western Oregon native prairie

Creator:: Clark, Deborah L.
Abstract:: Knowledge of post-dispersal seed fates and other regeneration characteristics is crucial for predicting abundances and distributions of populations and, ultimately, community species composition and diversity. Seed fate studies, however, are rare primarily due to the difficulty of determining seed fates and causes of mortality. This thesis investigated post-dispersal seed fates...
Resource Type:: Dissertation
Full Text:: , Mark V. Wilson, Kenneth B. Johnson, Patricia S. Muir, Donald B. Zobel, and Jeffrey C. Miller, for

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

Creator:: McGrath, Daniel M. (Daniel Morton)
Abstract:: Relay strip-cropping combines two vegetation management tactics, under-sowing and strip-management. In this study conducted from 1994 though 1997, a cover crop seed-mixture containing oats (Avena sativa L. var. "Monida"), common vetch (Vicia sativa L.), red clover (Trifolium pratense L.), annual ryegrass (Lolium multflorum Lam.), and buckwheat (Fagopyrum esculentum Moench) was...
Resource Type:: Dissertation
Full Text:: . Kenneth B. Johnson, and Dr. Jeffrey C. Miller for their suggestions and comments. My wife Darryla, who

ScholarsArchive@OSU

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Pathogenicity of Phytophthora species from Oregon waterways

Interrelationship of wheat cultivar mixtures, stripe rust and yield

Host and Pathogen Genetics in the Sharp Eyespot Disease of Wheat

Farmer perspectives on the transition to organic agriculture : an Oregon study of farmer motivations and barriers

Ascospore viability and dispersal from pruned branches infected with Anisogramma anomala

Phylogenetic relationships of the bumblebees (Apidae: Hymenoptera) in the Pacific Northwest of America inferred from mitochondrial cytochrome oxidase gene sequences

Understanding Host-Pathogen Interactions in the Sphaerulina musiva-Populus Pathosystem

Post-dispersal seed fates in a Western Oregon native prairie

Conservation of arthropod natural enemies in broccoli with relay strip-cropping

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