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Filtering by: Creator Woodson, C. B. Remove constraint Creator: Woodson, C. B. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Peer Reviewed No Remove constraint Peer Reviewed: No

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  • Understanding sporulation and dissemination of Podosphaera macularis, hop powdery mildew

    Creator:
    Peetz, Amy B.
    Abstract:
    Podosphaera macularis causes one of the most important diseases, powdery mildew, of Humulus lupulus (hop). If left unmanaged, hop powdery mildew can cause total crop loss due to disease or browning of hop cones rendering the cones unmarketable to buyers. The Hop Powdery Mildew Infection Risk Index (HOPS) is heavily...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS OF Amy B. Peetz for the degree of Master of Science in Botany and Plant Pathology presented on

  • 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:
    are high in several micronutrients, such as carbohydrates, starch, proteins, vitamin C, and fiber

  • Ecology and biological control of an apomictic invasive plant, Chondrilla juncea (Asteraceae)

    Creator:
    Campanella, Donald M.
    Abstract:
    A study consisting of three parts was undertaken to investigate how variation in species interactions, population genetic structure, epidemiological parameters, and plant breeding system may influence the ecology and biological control of an apomictic invasive plant, Chondrilla juncea (Asteraceae). Interactions between natural enemy species may modify their net effect on...
    Resource Type:
    Dissertation
    Full Text:
    : _______________________________ ______________________________ Peter B. McEvoy Christopher C. Mundt A study

  • 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

  • The detection of ilarvirus (subgroup B) by enzyme-linked immunosorbent assay

    Creator:
    McMorran, Jeffrey P.
    Abstract:
    The reliability and sensitivity of enzyme-linked immunosorbent assay (ELISA) in the detection of ilarvirus (isometric labile ringspot virus) subgroup B and prune dwarf virus (PDV) isolates in Prunus and Malus species has been well established. To use this technique in large scale virus indexing programs more information was required on...
    Resource Type:
    Masters Thesis
    Full Text:
    Experimental Design 99 Experiment A 99 Experiment B 99 Experiment C 100 Experiment D 100- Experiment E 100

  • 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:
    ., Adams, G.C., Halkett, F., Catal, M., Husson, C., Nagy, Z.Á., Hansen, E.M., Marçais, B., Frey, P., 2013

  • Hybridization between Castilleja levisecta and C. hispida : Implications for Pacific Northwest Prairie Management

    Creator:
    Sandlin, Isaac J., III
    Abstract:
    Conservation conflicts may develop on restoration sites with multiple species recovery objectives. For example, on Pacific Northwest prairies, the co-planting of the diploid cytotype of the common native wildflower Castilleja hispida with the endangered wildflower C. levisecta has resulted in putative Castilleja hybrids on restoration sites, prompting fears that genetic...
    Resource Type:
    Masters Thesis
    Full Text:
    March 15, 2018. Title: Hybridization between Castilleja levisecta and C. hispida: Implications for

  • 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

  • Epiphytic yeasts isolated from apple leaves to control of gray and blue mold fruit rots of apple

    Creator:
    Falconi, Cesar E.
    Abstract:
    Eight phylloplane yeasts were isolated from backyard apple trees in Corvallis, OR. Yeast isolates were classified to genus or species level. All isolates were tested in vitro for antagonistic activity against the postharvest pathogens Botrytis cinerea and Penicillium expansum. Of these isolates, Aureobasidium pullulans, Sporobolomyces roseus Rhodotorula sp., consistently reduced...
    Resource Type:
    Masters Thesis
    Full Text:
    juice concentrations on the germination of conidia of B. cinerea after 24 h of incubation at 5 C 23