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Filtering by: Creator Bretherton, Christopher S. Remove constraint Creator: Bretherton, Christopher S. Advisor Mundt, Christopher C. Remove constraint Advisor: Mundt, Christopher C. Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • 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

  • 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

  • Effects of host resistance on Mycosphaerella graminicola populations

    Creator:
    Cowger, Christina
    Abstract:
    Mycosphaerella graminicola (anamorph Septoria tritici) causes Septoria tritici blotch, a globally important disease of winter wheat. Resistance and pathogenicity generally vary quantitatively. The pathogen reproduces both sexually and asexually, and the pathogen population is highly genetically variable. Several unresolved questions about the epidemiology of this pathosystem are addressed by this...
    Resource Type:
    Dissertation
    Full Text:
    Resistance on Mycosphaerella graminicola Populations. Abstract approved: Christopher C. Mundt

  • Interactive effects of stripe rust and plant competition in heterogeneous wheat populations

    Creator:
    Finckh, Maria Renate
    Abstract:
    Disease has been implied as an important selective force acting in plant populations. This study was conducted to determine the effects of stripe rust (Puccinia striiformis) on the population dynamics of wheat (Triticum aestivum) cultivar mixtures. Five wheat cultivars were grown in pure stands and all possible mixtures at three...
    Resource Type:
    Dissertation
    Full Text:
    a pathogen in the presence of the pathogen. The susceptible genotype S is superior in competitive

  • Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

    Creator:
    Garrett, Karen A.
    Abstract:
    Most studies of plant disease epidemiology have focused on epidemics in host populations composed of a single genotype. But crop plant diversity can be a useful means of improving the deployment of resistance genes. In a series of experiments with wheat stripe rust and potato late blight, we studied factors...
    Resource Type:
    Dissertation
    Full Text:
    Wheat Stripe Rust and Potato Late Blight. Abstract approved: Christopher C. Mundt Most studies of

  • Effects of intercropping beans with maize on angular leaf spot and rust of beans

    Creator:
    Boudreau, Mark Alan, 1958-
    Abstract:
    Experiments were performed to determine the nature of maize influence on bean disease in additive-type intercrops. Overall effects of intercrops on angular leaf spot (caused by Phaeoisariopsis griseola) in Kenya indicated >23% reductions (P<0.05) in area under the disease progress curve (AUDPC) in two of three season-site combinations. Fertilization tended...
    Resource Type:
    Dissertation
    Full Text:
    Christopher C. Mundt Experiments were performed to determine the nature of maize influence on bean disease

  • Effects of single and multiple stressors on communities of wheat and wild oats

    Creator:
    Pfleeger, Thomas G.
    Abstract:
    Most plant toxicology tests developed in support of environmental laws use a single stress applied to an individual plant. While tests using individual species or stresses require fewer resources and are easier to interpret, they are under increasing criticism for being unrealistic and missing important ecological interactions. The objective of...
    Resource Type:
    Dissertation
    Full Text:
    Stressors on Communities of Wheat and Wild Oats. Abstract approved: Christopher C. Mundt Most plant

  • Pathogenic variability and adaptation of Septoria tritici to different wheat cultivars

    Creator:
    Ahmed, Hafiz Uddin
    Abstract:
    Experiments were done to determine pathogenic variability and pathogenic adaptation of Septoria tritici to different wheat cultivars. Fifteen S. tritici isolates from California, Oregon, and Texas were evaluated on seedlings of two sets of geographically diverse wheat cultivars under greenhouse conditions. Significant isolate effects, cultivar effects, and isolate X cultivar...
    Resource Type:
    Dissertation
    Full Text:
    . Coakley Christopher C. Mundt Experiments were done to determine pathogenic variability and

  • 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