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  • Development and use of molecular tools in Fragaria

    Creator:
    Njuguna, Wambui
    Abstract:
    This dissertation describes the application and development of molecular tools that have great potential for use in studying variation in strawberry germplasm. The first study evaluated 91 microsatellite (simple sequence repeat, SSR) markers for transferability in 22 Fragaria species and their utility in fingerprinting octoploid strawberries. Out of the transferable...
    Resource Type:
    Dissertation
    Full Text:
    used in the study. Testing of two molecular markers linked to the red stele and anthracnose

  • 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:
    produce apothecia in early spring, providing primary inoculum for Mummy Berry Disease of blueberry

  • 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:
    American species of red raspberry improved upon flavor, disease resistance and growth habit. Eventually

  • Effects of Pesticide Exposure on Honey Bee Health : Impacts of Pesticide Interactions and Exposure Through Multiple Routes

    Creator:
    Parreira, Stephanie
    Abstract:
    Honey bees (Apis mellifera) are responsible for approximately $17 billion in crop production per year in the United States, and are arguably the most important pollinators in the nation. The future of crop pollination and production is threatened by widespread national honey bee colony losses, which have averaged approximately 30%...
    Resource Type:
    Masters Thesis
    Full Text:
    be a critical form of disease resistance in honey bee colonies, and adverse impacts of pesticide

  • Phylogenetic Estimation and Ancestral State Reconstruction of Rubus (Rosaceae) using Target Capture Sequencing

    Creator:
    Carter, Katherine A.
    Abstract:
    Hybridization, polyploidy, and apomixis have made phylogenetic estimation in Rubus challenging. I used target capture to sequence approximately 1000 low copy nuclear loci and the chloroplast genome for 94 accessions representing the genus Rubus and distributed worldwide. Species phylogenies were estimated using two coalescent based methods, ASTRAL-II and SVDQuartets, and...
    Resource Type:
    Masters Thesis
    Full Text:
    . Disease resistance is also a major focus of most red raspberry programs because the crop is negatively

  • Nutrient Profile and Nursery Feeding Damage of Halyomorpha halys (Hempitera: Pentatomidae)

    Creator:
    Skillman, Victoria P.
    Abstract:
    Halyomorpha halys Stål, brown marmorated stink bug or BMSB, is now present in 43 US states. A native of eastern Asia, this pest can feed on ~200 different plant species damaging bark, leaves, buds, stems, and fruits. Many of these plant species include wild plants, ornamentals, and agricultural crops. BMSB...
    Resource Type:
    Masters Thesis
    Full Text:
    2014, 2015). In addition to agricultural crops, they feed on a range of ornamental hosts, such as red