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Filtering by: Creator VanderKooi, Scott P. Remove constraint Creator: VanderKooi, Scott P. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Committee Member Johnson, Ken Remove constraint Committee Member: Johnson, Ken

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  • 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:
    : Plant Disease Epidemiology. P. R. Scott and A. W. Bainbridge, eds. Blackwell Scientific Pub., Oxford. 4

  • Histological comparisons of needle tissues of four species of white pine infected by Cronartium ribicola

    Creator:
    Sweeney, Katarina
    Abstract:
    Hypersensitive response-like (HR-like) needle reactions to infection by the white pine blister rust pathogen, Cronartium ribicola, have been reported for several species of five needle pines native to western North America. The best-studied examples are in Pinus monticola and P. lambertiana. In these species a "needle spot" phenotype has been...
    Resource Type:
    Masters Thesis
    Full Text:
    needle pines native to western North America. The best-studied examples are in Pinus monticola and P

  • 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:
    stand of winter wheat were inoculated with three races of P. striiformis (CDL 27, CDL 29, and CDL 41

  • 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:
    . Jlibene, M., Gustafson, J. P., and Rajaram, S. 1994. Inheritance of resistance to Mycosphaerella

  • 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:
    Scott Robbins for management of the field plots at Corvallis. * Thanks to Candelaria and Jesus