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Filtering by: Creator Berry, R. Remove constraint Creator: Berry, R. Academic Affiliation Botany and Plant Pathology Remove constraint Academic Affiliation: Botany and Plant Pathology Non-Academic Affiliation Oregon State University. Graduate School Remove constraint Non-Academic Affiliation: Oregon State University. Graduate School

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  • 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:
    Mulching to Manage Mummy Berry of Blueberry

  • Response to fenamiphos, extraction techniques and population dynamics of Pratylenchus penetrans on western Oregon red raspberry

    Creator:
    Lolas, Mauricio
    Abstract:
    The effects of fenamiphos on soil and root populations of Pratylenchus penetrans were evaluated in four red raspberry cv. Willamette fields in Northwestern Oregon. Field 1 was a silty clay loam with 53% organic matter (OM). Field 2 and 3 were silty loam soils with 3.25 and 2.55% OM, respectively...
    Resource Type:
    Masters Thesis
    Full Text:
    Strik, Dr. Jay Pscheidt, and Dr. Ralph Berry, for their contributions to this thesis, their advices

  • Population viability analysis of endangered plant species : an evaluation of stochastic methods and an application to a rare prairie plant

    Creator:
    Kaye, Thomas N.
    Abstract:
    Transition matrix models are one of the most widely used tools for assessing population viability. The technique allows inclusion of environmental variability, thereby permitting estimation of probabilistic events, such as extinction. However, few studies use the technique to compare the effects of management treatments on population viability, and fewer still...
    Resource Type:
    Dissertation
    Full Text:
    Keith Karoly (Reed College), Ed Guerrant (Berry Botanic Garden), Susan Kephart (Willamette University

  • Identification of Endogenous and Exogenous Pararetroviruses in Red Raspberry (Rubus idaeus L.) and Blueberry (Vaccinium corymbosum L.)

    Creator:
    Diaz Lara, Alfredo
    Abstract:
    The Pacific Northwest (Oregon and Washington in the United States and British Columbia in Canada) is one of the major producers of red raspberry (Rubus idaeus L.) and blueberry (Vaccinium corymbosum L.) in the world. The expansion of growing area with these crops has resulted in the emergence of new...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Robert R. Martin The Pacific Northwest (Oregon and Washington in the

  • Sequence determination and regional epidemiology of raspberry bushy dwarf virus (RBDV)

    Creator:
    Taylor, Susannah M.
    Abstract:
    Raspberry bushy dwarf virus (RBDV) is the sole member of the idaeovirus genus of plant viruses. It is a pollen-borne virus that economically impacts both red and black raspberries worldwide. Three strains of the bipartite RBDV have been reported. The common strain found in North America, South America, Australia, New...
    Resource Type:
    Masters Thesis
    Full Text:
    Regional Epidemiology of Raspberry Bushy Dwarf Virus (RBI V). Abstract approved: Robert R. Martin

  • 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:
    : R. Martin The objective of this study was to characterize an unknown agent associated with decline

  • Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA

    Creator:
    Nelson, Peter R.
    Abstract:
    Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients,...
    Resource Type:
    Dissertation
    Full Text:
    . _______________________________________________________________________ AN ABSTRACT OF THE DISSERTATION OF Peter R. Nelson for the

  • Patterns of ectomycorrhizal host-fungus specificity in the Pacific Northwest

    Creator:
    Molina, R.
    Abstract:
    Results from approximately 400 fungus-host pure culture inoculations indicate that specificity of ectomycorrhizal associations is a complex phenomenon and cannot be based solely on field observations of sporocarp-host associations. Of the numerous sporocarp-host specific fungi tested, most formed ectomycorrhizae with one or more unexpected, non-associated hosts. These results conclusively demonstrate...
    Resource Type:
    Dissertation
    Full Text:
    fuscorubens + Larix occidentalis ectomycorrhiza, x175. 44 Cross section of R. fuscorubens + Picea sitchensis

  • Performance of Willamette Valley native plants following herbicide exposure

    Creator:
    Blakeley-Smith, Matthew R.
    Abstract:
    Prairies were once the dominant vegetation type in Oregon's Willamette Valley. Land use conversion, fire suppression, succession, and invasive species have reduced Willamette Valley prairies to less than 1% of their historical area. The remnant prairies that persist today are small in size and are highly fragmented. Marginal strips of...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Matthew R. Blakeley-Smith for

  • Primary productivity and community structure of an estuarine impoundment

    Creator:
    Lyford, John Higgins
    Abstract:
    An impounded estuary was employed to study primary productivity, community respiration, and community structure as they related to seasonal and temporal succession, salinity, and water temperature. Plankton metabolism was studied by means of the light-and dark-bottle technique. Benthic community metabolism was determined by using the "diurnal oxygen curve" method. Four...
    Resource Type:
    Dissertation
    Full Text:
    STRUCTURE OF AN ESTUARINE IMPOUNDMENT Abstract approved Redacted for Privacy r professor), An