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Filtering by: Creator Jonko, Alexandra K. Remove constraint Creator: Jonko, Alexandra K. Degree Field Horticulture Remove constraint Degree Field: Horticulture

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  • 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:
    : _______________________________________________________________________ Alexandra G. Stone Root rot of sweet corn in western Oregon and Washington is a

  • Winter Squash: Production and Storage of a Late Winter Local Food

    Creator:
    Wetzel, Jennifer D.
    Abstract:
    Winter squash is an important late winter vegetable crop for local and regional markets; however, farmers in western Oregon report that this crop is marginally profitable due to losses in storage and relatively low yields for the high culinary value kabocha and buttercup types. In order to increase the sales...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: _____________________________________________________________________ Alexandra G. Stone

  • 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:
    Management and Root Health. Alexandra G. Stone Annual applications of fresh or composted dairy manure were

  • 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

  • Patterns of carbon storage within a mature northern highbush blueberry production system

    Creator:
    Nemeth, Denise Alexandra
    Abstract:
    The objectives of this study were to: 1) determine how organic matter (incorporated vs. surface mulch) and nitrogen fertilization rate impact northern highbush blueberry (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal infection in mature plants, and 2) determine the magnitude of carbon fluxes (carbon...
    Resource Type:
    Dissertation
    Full Text:
    Alexandra Nemeth for the degree of Doctor of Philosophy in Environmental Science and Horticulture presented

  • Soil Water Tension Irrigation Criteria Affects Both Stevia Rebaudiana Leaf Yield and Leaf Steviol Glycoside Composition

    Creator:
    Parris, Cheryl A.
    Abstract:
    Stevia (Stevia rebaudiana) is a perennial herbaceous plant native to Paraguay and used traditionally by the native Guarani peoples for centuries to sweeten medicinal teas. Stevia has only been commercially cultivated over the past 50 years and cultural practice information suitable for implementation by growers is limited. Currently stevia’s commercial...
    Resource Type:
    Masters Thesis
    Full Text:
    , persistence, understanding and valuable insight throughout this process. To Dr. Alexandra C Stone, for her

  • Determining novel control methods for cabbage maggot (Delia radicum) in the Pacific Northwest

    Creator:
    Dugger, Chloe D.
    Abstract:
    Cabbage maggot, Delia radicum (Diptera: Anthomyiidae) impacts the production of Brassicaceae crops worldwide. The larva feed on the roots of crops causing reductions in yields due to impaired root function and unmarketability of crops. Chemical and cultural management programs are commonly used to control cabbage maggot with varying rates of...
    Resource Type:
    Masters Thesis
    Full Text:
    . Thank you to my other committee members, Navneet Kaur, Alexandra Stone, and Cynthia Ocamb, for your

  • Pollination studies

    Creator:
    Vincent, Clarence Cornelius
    Resource Type:
    Masters Thesis
    Full Text:
    " Hoover's H. 5O " medium. Haas 100 " " abund. HollandiR. 50 ft 0 0 0 Holland P. 100 0 0 Hyde's K. 100 " I

  • Nitrogen use in container-grown woody ornamentals

    Creator:
    Sandrock, David Ray, 1971-
    Abstract:
    Lasting, effective solutions to nitrogen (N) loss from container nurseries must address layers of complexity ranging in scale from whole system nursery management to gene expression. Group-based On-site Active Learning (GOAL) was developed to aid nursery managers and related stakeholders (e.g. neighbors, policy makers, regulating agencies, researchers) in developing a...
    Resource Type:
    Dissertation

  • Mapping QTL for root rot resistance, root traits, and morphological trait in a common bean recombinant inbred population

    Creator:
    Hagerty, Christina H.
    Abstract:
    Root rot diseases of bean (Phaseolus vulgaris L.) are a problem wherever they are grown, and are a major constraint to dry edible and snap bean production. Root rot is a primary yield limitation of snap bean production in the US, especially within the top three snap bean producing states...
    Resource Type:
    Masters Thesis
    Full Text:
    thank my parents, Dr. Pat Hagerty and Stephanie Hagerty, and sister, Alexandra Hagerty for always