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Filtering by: Subject Hazelnuts -- Diseases and pests -- Northwestern States Remove constraint Subject: Hazelnuts -- Diseases and pests -- Northwestern States Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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  • Ascospore viability and dispersal from pruned branches infected with Anisogramma anomala

    Creator:
    Heckert, Stephanie
    Abstract:
    Viability and dispersal of ascospores of Anisogramma anomala, the cause of eastern filbert blight (EFB) on European hazelnut, from diseased branches pruned from trees were measured. In each of two years, branches bearing stromata of A. anomala were cut in mid-December and compared to branches cut near budbreak in March,...
    Resource Type:
    Masters Thesis
    Full Text:
    …………………………………………….. 12 Disease Management…………………………….. … 14 Chapter 3. Materials and

  • Genetic variability in the eastern filbert blight pathosystem

    Creator:
    Osterbauer, Nancy K.
    Abstract:
    The heritability of resistance to eastern filbert blight, caused by Anisogramma anomala, in European hazelnut (Corylus avellana) was evaluated in the progeny of seven cultivars crossed in 12 combinations. Progeny produced by crossing 'VR6-28' with three susceptible cultivars segregated 1:1 for complete resistance to eastern filbert blight. Histograms of disease...
    Resource Type:
    Dissertation
    Full Text:
    ' and `Willamette'. Heritability of disease incidence, number of cankers, and proportion of wood

  • Castilleja and Pedicularis are confirmed as telial hosts for white pine blister rust in whitebark pine ecosystems of Oregon and Washington

    Creator:
    Mulvey, Robin L.
    Abstract:
    The primary objective of this research was to determine if native species within the genera Castilleja and Pedicularis are naturally infected by white pine blister rust (Cronartium ribicola) in whitebark pine ecosystems of the Oregon and Washington Cascade Range. Secondary objectives were to monitor the phenology of aecial and telial...
    Resource Type:
    Masters Thesis
    Full Text:
    Park (MRNP) and Crater Lake National Park (CLNP), and growth chamber inoculations at Oregon State

  • Biology of sweet cherry powdery mildew

    Creator:
    Calabro, Jill M.
    Abstract:
    The Pacific Northwest has become one of the nation’s premier sweet cherry, Prunus avium, production areas. As production of sweet cherries has flourished in Oregon and Washington, so has powdery mildew, caused by the fungus Podosphaera clandestina, which infects both foliage and fruit causing severe economic damage to growers. Sweet...
    Resource Type:
    Dissertation
    Full Text:
    disease evaluations indicated that the training system, rootstock, and cherry cultivar influence the