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Filtering by: Subject Plants, Ornamental -- Diseases and pests -- Oregon Remove constraint Subject: Plants, Ornamental -- Diseases and pests -- Oregon Committee Member Johnson, Kenneth B. Remove constraint Committee Member: Johnson, Kenneth B.

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  • DNA markers linked to novel sources of resistance to eastern filbert blight in European hazelnut (Corylus avellana L.)

    Creator:
    Sathuvalli, Vidyasagar R.
    Abstract:
    The hundred-year history of the hazelnut industry in the Pacific Northwest is threatened by eastern filbert blight (EFB) caused by the fungus Anisogramma anomala (Peck) E. Müller. Marker-assisted selection (MAS) has been extensively used for ‘Gasaway’ resistance in the hazelnut breeding program at Oregon State University. Concern over breakdown of...
    Resource Type:
    Masters Thesis
    Full Text:
    facilities and funding. David Smith grafted all the plant materials in the greenhouse for disease

  • Pyrenophora tritici-repentis : investigation of factors that contribute to pathogenicity

    Creator:
    Holman, Thomas W.
    Abstract:
    Pyrenophora tritici-repentis (Ptr) is the necrotrophic fungus responsible for tan spot of wheat (Triticum aestivum). Ptr causes disease on susceptible wheat cultivars through the production and secretion of host-selective toxins (HSTs). HSTs are compounds that are only known to be produced by fungi and considered to be primary determinants of...
    Resource Type:
    Masters Thesis
    Full Text:
    assistantships from the department of Botany and Plant Pathology, Oregon State University. I would like to

  • 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:
    southwestern Oregon following disease monitoring for P. ramorum and was originally reported as “New species

  • Managing Microdochium Patch Using Non-Traditional Fungicides on Annual Bluegrass Putting Greens

    Creator:
    Mattox, Clint M.
    Abstract:
    Currently, fungicide applications are the predominant method of control for the cool weather pathogen Microdochium patch (Microdochium nivale). Increasing pesticide restrictions have generated concern regarding management of Microdochium patch. Three separate field trials exploring non-traditional fungicides were conducted between 2013 and 2015 on an annual bluegrass (Poa annua L.) sand-based...
    Resource Type:
    Masters Thesis
    Full Text:
     the   thatch  and  plant  tissue  may  have  an  affect  on  the  disease

  • 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:
    TABLE OF CONTENTS CHAPTER Page 1 HOST PLANT DEFENSES AND VEGETATION 7 MANAGEMENT VEGETATION

  • 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:
    events in spore traps located at the Oregon State University Botany and Plant Pathology Field