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Filtering by: Creator Anderson, Christopher Remove constraint Creator: Anderson, Christopher Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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  • Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

    Creator:
    DiLeone, Julie A.
    Abstract:
    This study quantified the frequency of simple versus complex races of Puccinia striiformis Westend. in mixtures of wheat cultivars possessing different race-specific resistance genes. A simple race of a pathogen can infect only one component, and a complex race of the pathogen can infect two or more components of an...
    Resource Type:
    Masters Thesis
    Full Text:
    : Christopher C. Mundt This study quantified the frequency of simple versus complex races of Puccinia

  • 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:
    genetics" (May and Anderson, 1979). Antonovics and Alexander (1987) therefore distinguish between an

  • 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

  • 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

  • Cephalosporium stripe of wheat : seedling-based resistance screening and pathogenic variability

    Creator:
    Cowger, Christina
    Abstract:
    Cephalosporium stripe of wheat (Triticum aestivum), caused by the soilborne fungus Cephalosporium gramineum, results in significant yield reductions in dryland winter wheat crops of the U.S. Pacific Northwest. The development of resistant cultivars offers the best hope for disease control. Breeding for resistance is hampered by the long trial times...
    Resource Type:
    Masters Thesis
    Full Text:
    : Christopher C. Mundt Cephalosporium stripe of wheat (Triticum aestivum), caused by the soilborne 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

  • Genetic diversity and interactions in populations of plants and pathogens

    Creator:
    Knott, Elizabeth A.
    Abstract:
    Two experiments involving interactions between wheat (Triticum aesitivium L.) cultivars and rust pathogens were investigated. One experiment evaluated the aggressiveness (measured by infection efficiency and latent period) of populations of Puccinia recondita Rob. when inoculated on the cultivar they were isolated from, their "own" cultivar, and when inoculated onto other...
    Resource Type:
    Masters Thesis
    Full Text:
    Interactions in Populations of Plants and Pathogens. Redacted for privacy Abstract approved: Christopher C

  • 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

  • Sensitivity of wheat genotypes to a toxic fraction produced by Cephalosporium gramineum and correlation with disease susceptibility

    Creator:
    Rahman, Mahfuzur
    Abstract:
    Cephalosporium stripe, caused by the soil-borne ascomycete Cephalosporium gramineum, is becoming an increasingly important disease of winter wheat (Triticum aestivum) in several areas of the world, especially where stubble mulch is practiced to maintain soil moisture and prevent erosion. As cultural control of the disease is infeasible and no fungicides...
    Resource Type:
    Masters Thesis
    Full Text:
    ramineum and Correlation with Disease Susceptibility Abstract approved: Christopher C. Mundt Thorhas J

  • Science Takes Flight: Detection of Black Leg on Turnip Gray Mold on Hemp

    Creator:
    Bates, Taylor A.
    Abstract:
    Disease detection through traditional techniques such as scouting fields on foot, molecular assays, or morphological identification of plant pathogens is time consuming and costly. Disease diagnosis in the field can be extremely subjective, and largely depends on the experience and knowledge of pathogen identification and disease quantification. This thesis provides...
    Resource Type:
    Masters Thesis
    Full Text:
    , camera, and software. I would like to thank Dr. Christopher Still for being my graduate representative