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Filtering by: Subject Beans -- Diseases and pests -- Control -- Oregon Remove constraint Subject: Beans -- Diseases and pests -- Control -- Oregon Committee Member Parke, Jennifer Remove constraint Committee Member: Parke, Jennifer

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  • 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:
    Bean Common Root Rot and Soil Quality by Maria Cecilia Cespedes Leon A THESIS submitted to Oregon

  • Characterization, epidemiology, and ecology of a virus associated with black raspberry decline

    Creator:
    Halgren, Anne B.
    Abstract:
    The objective of this study was to characterize an unknown agent associated with decline in black raspberry (Rubus occidentalis) in Oregon. A virus was found consistently associated with decline symptoms of black raspberries and was named Black raspberry decline associated virus (BRDaV). Double stranded RNA extraction from BRDaV-infected black raspberry...
    Resource Type:
    Dissertation
    Full Text:
    disease control is not feasible. Often, controlling the invertebrate vector is the primary and most

  • Plant hormone-induced defense responses against Botrytis cinerea

    Creator:
    Akagi, Aya
    Abstract:
    Several plant hormones, including ethylene and jasmonates, are known to mediate responses against biotic and abiotic stress. The first and second objectives of this thesis were (i) to elucidate the role of ethylene in defense responses against Botrytis cinerea and specifically (ii) to determine the potential contribution of ethylene response...
    Resource Type:
    Dissertation
    Full Text:
    ............................................................................................... 30  Softening and disease progression ..................................................... 33

  • Mulching to Manage Mummy Berry of Blueberry

    Creator:
    Florence, Jade
    Abstract:
    Monilinia vaccinii-corymbosi pseudosclerotia overwinter on the soil surface and produce apothecia in early spring, providing primary inoculum for Mummy Berry Disease of blueberry. Burial under 2.5 cm of soil or the absence of light have previously been identified as critical factors preventing the development of apothecia. Mulches were applied to...
    Resource Type:
    Dissertation
    Full Text:
    ............................................................................................................... ETIOLOGY AND MANAGEMENT OF MUMMY BERRY DISEASE ................................................ 8 LIGHT

  • Enhancing pest mite biological control by Typhlodromus pyri (Acari: Phytoseiidae) in Pacific Northwest vineyards

    Creator:
    Gadino, Angela Noelle
    Abstract:
    The predatory mite Typhlodromus pyri (Acari: Phytoseiidae) is the predominant species in cool climate Pacific Northwest vineyards and a principal predator of pest mites including the grapevine rust mite Calepitrimerus vitis (Acari: Eriophyidae). In recent years vineyards have been experiencing C. vitis population outbreaks leading to increased economic damage from...
    Resource Type:
    Dissertation
    Full Text:
    . Basic vineyard management practices include vine pruning, canopy management, disease and pest control

  • Responses and relationships among Fusarium species, sweet corn, and western spotted cucumber beetles

    Creator:
    Miller, Nathan L. (Nathan Louis)
    Abstract:
    Sweet corn (Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s. Studies were done to determine if there is a relationship between ear weight and several disease parameters including necrotic crowns or stalk nodes, nodal root rot, radicle root rot, and sub-crown...
    Resource Type:
    Dissertation
    Full Text:
    . Studies were done to determine if there is a relationship between ear weight and several disease