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Filtering by: Subject Root rots Remove constraint Subject: Root rots Decade 2000-2009 Remove constraint Decade: 2000-2009 Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • Soil organic matter management and root health

    Creator:
    Darby, Heather
    Abstract:
    Annual applications of fresh or composted dairy manure were assessed for their effects on root rots of sweet corn and snap bean and damping-off of cucumber in a field soil. Soil biological and physical properties were measured as possible indicators of root rot suppressive potential. Regardless of amendment type or...
    Resource Type:
    Dissertation
    Full Text:
    field soil. Soil biological and physical properties were measured as possible indicators of root rot

  • Organic soil amendements (sic) : impacts on snap bean common root rot and soil quality

    Creator:
    Cespedes Leon, Maria Cecilia
    Abstract:
    Common root rot is a major disease of commercially grown snap bean (Phaseolus vulgaris L.) on the irrigated sandy soils of central Wisconsin. The objective of this study was to determine the relationships between soil properties and suppressiveness to common root rot of snap bean (causal agent Aphanomyces euteiches) in...
    Resource Type:
    Masters Thesis
    Full Text:
    Amendments: Impacts On Snap Bean Common Root Rot And Soil quality Abstract approved: Richard P. Dick

  • Serial manure amendments : effects on soil properties and root rot of sweet corn

    Creator:
    Cox, Bonnie S. Hoffman
    Abstract:
    The effect of serial (multiple-year) organic matter (OM) amendment on soil properties has been described in some cropping systems, although less is known about the effect of serially amended field soils on soil-borne plant diseases. The objectives of this study were to describe the effects of the third and fourth...
    Resource Type:
    Masters Thesis
    Full Text:
    : Effects on Soil Properties and Root Rot of Sweet Corn. Abstract aPP Alexandra G. Stone The effect of

  • Sweet corn decline syndrome in Oregon's Willamette Valley

    Creator:
    Hoinacki, Elisabeth V.
    Abstract:
    For the past several years vegetable growers in Oregon's Willamette Valley have experienced reduced yields in their sweet corn plantings. We conducted studies to 1) describe the symptomology and etiology of the disease, 2) test a root rot rating system we developed to evaluate factors in the disease syndrome, and...
    Resource Type:
    Dissertation
    Full Text:
    ) test a root rot rating system we developed to evaluate factors in the disease syndrome, and 3

  • Impact of Armillaria and annosus root diseases on stand and canopy structure, species diversity, and down woody material in a central Oregon mixed-conifer forest

    Creator:
    Fields, Kristen L. N.
    Abstract:
    White and grand fir are both valuable components of the mixed-conifer stand structure managed for late-successional reserves in central Oregon. However, they are often short-lived species because of high susceptibility to root diseases, defoliating insects, bark beetles, and wildfire. This study focuses on the effects of root diseases caused by...
    Resource Type:
    Masters Thesis
    Full Text:
    stringy in the later stages of decay. Annosus root and butt rot is more difficult to identify. The

  • Cover crop effects on root rot of sweet corn and soil properties

    Creator:
    Miyazoe, Mikio
    Abstract:
    Root rot of sweet corn in western Oregon and Washington is a significant disease that can reduce yield of intolerant cultivars of processed sweet corn by fifty percent. Root rot is caused by a complex of soilborne organisms, including Drechslera sp., Phoma terrestris, and Pythium arrhenomanes. Processors have adopted tolerant...
    Resource Type:
    Masters Thesis
    Full Text:
    Horticulture presented on June 21, 2007. Title: Cover Crop Effects on Root Rot of Sweet Corn and Soil

  • ¹³C-CP MAS NMR study of decomposition of five coniferous woody roots from Oregon

    Creator:
    Hawkins, Robert E.
    Abstract:
    Using ¹³C cross polarization magic angle spinning nuclear magnetic resonance techniques on 5 species of dead trees from the northwest (western hemlock, Douglas fir, Sitka spruce, lodgepole pine and ponderosa pine) I tracked the lignin and cellulose content over a 22 to 36 year period in order to determine the...
    Resource Type:
    Masters Thesis
    Full Text:
    observation. Mark Harmon and Hua Chen of the Department of Forest Science believe that white rot occurred