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Filtering by: Creator Reed, Kenneth Lee, 1942- Remove constraint Creator: Reed, Kenneth Lee, 1942- Committee Member Johnson, Kenneth B. Remove constraint Committee Member: Johnson, Kenneth B.

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  • 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:
    tree (Orlikowski et al., 2011). P. lateralis Tucker and Milbrath (1942) is a known pathogen of Port

  • Morphological variability and seed dormancy of Amelanchier (Rosaceae) grown in Oaxaca, Mexico

    Creator:
    Cruz-Cruz, Efrain
    Abstract:
    The purpose of this research was to determine whether hybridization between Amelanchier denticulata. (H.B.K.) Koch and Amelanchier nervosa (Decaisne) StandL occurs in Oaxaca, Mexico, and to evaluate components of yield and germination characteristics and seed dormancy of Amelanchier denticulata. Amelanchier nervosa and Amelanchier denticulata samples and morphological characters were used...
    Resource Type:
    Dissertation
    Full Text:
    Rangeland Resources), Dr. Kenneth B. Johnson (Department of Botany and Plant Pathology), Dr. Douglas Green

  • 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