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Filtering by: Creator Jung, Bong Nam Remove constraint Creator: Jung, Bong Nam Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology

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  • Pathogenicity of Phytophthora species from Oregon waterways

    Creator:
    Navarro, Sarah M.
    Abstract:
    Described as one of the most destructive pathogens of agricultural crops and forest trees, Phytophthora is a genus of microorganisms containing over 100 known species. Phytophthora alni has caused collar and root disease in alders throughout Europe and a form of the species has recently been isolated in North America....
    Resource Type:
    Masters Thesis
    Full Text:
    Alder Dieback in Oregon………………………………………..…….. 10 Red Alder- Alnus rubra Bong…………………………………..……. 14

  • Phytophthora species and riparian alder tree damage in western Oregon

    Creator:
    Sims, Laura L.
    Abstract:
    The genus Phytophthora contains some of the most destructive pathogens of forest trees, including the most destructive pathogen of alder in recent times, Phytophthora alni. Alder trees were reported to be suffering from canopy dieback in riparian ecosystems in western Oregon, which prompted a survey of alder health and monitoring...
    Resource Type:
    Dissertation
    Full Text:
    et al. 2002, Goheen et al. 2002, Hansen et al. 2003, Jung et al. 2003, Brasier et al. 2003b

  • Insights into the pathology and epidemiology of Phytophthora ramorum, causal agent of sudden oak death

    Creator:
    Daniels, Hazel A.
    Abstract:
    Sudden oak death is caused by the clonally reproducing generalist oomycete Phytophthora ramorum. The pathogen can infect more than 130 different plant hosts including Quercus spp., Larix kaempferi, and Notholithocarpus densiflorus, as well as common nursery genera such as Rhododendron and Camelia, where it causes symptoms ranging from bleeding cankers...
    Resource Type:
    Dissertation
    Full Text:
    lineages from Indochina and Japan (Van Poucke et al. 2012; Jung et al. 2021). All P. 2

  • Inferring Patterns and Processes of Emergence in Clonal Phytophthora Epidemics using Population Genomic Approaches

    Creator:
    Cauldron, Nicholas C.
    Abstract:
    Oomycete and fungal pathogens threaten food, fiber, and forests around the world. With climate change, these pathogens are expected to emerge more frequently. Evolution can facilitate their emergence through mechanisms such as mutations that change or expand host range. Characterizing evolutionary mechanisms in plant pathogens will contribute to our ability...
    Resource Type:
    Dissertation
    Full Text:
    East Asia, from which new populations were recently reported (Jung et al. 2020). Several facts

  • Mitigating cyanobacterial harmful algae blooms : the role of plant humics

    Creator:
    Theis, Susan A. F.
    Abstract:
    Cyanobacterial harmful algae blooms (cyanoHABs) are a growing concern worldwide due to damage of ecosystems and threats to human health. Previous research indicates that plant humics from aquatic and wetland vascular plants are effective inhibitors of cyanobacterial metabolism and growth and may be useful as control agents for mitigating cyanoHABs....
    Resource Type:
    Masters Thesis
    Full Text:
    molecular weight acids, and esters (Waybright et al 2009; Choe and Jung 2002; Bährs et al 2013; Wetzel et

  • The epidemiology of sudden oak death in Oregon forests

    Creator:
    Peterson, Ebba K.
    Abstract:
    The phytopathogen Phytophthora ramorum (Werres, DeCock & Man in't Veld), causal agent of Sudden Oak Death (SOD) of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus syn. Lithocarpus densiflorus), is established in coastal forests of the western United States. Since the discovery of SOD in the Douglas-fir / tanoak forests of...
    Resource Type:
    Dissertation
    Full Text:
    loads produced from tanoak lesions (Hansen et al. 2008). Red alder (Alnus rubra Bong.) is also

  • Community Ecology of Foliar Fungi and Oomycetes of Pseudotsuga menziesii on the Pacific Northwest Coast

    Creator:
    Gonen, Lilah
    Abstract:
    Pseudotsuga menziesii var. menziesii (coast Douglas-fir) is a tree of ecological, economic, and cultural value in its native North American Pacific Northwest (PNW) distribution. P. menziesii is host to a variety of well-documented endophytic foliar microorganisms, including the fungus Nothophaeocryptopus gaeumannii, the causal agent of Swiss needle cast (SNC), and...
    Resource Type:
    Masters Thesis
    Full Text:
    the Picea sitchensis (Bong.) Carr (Sitka spruce) vegetation zone, a narrow strip of coastal forest

  • Mediation of conifer root growth by mycorrhizal fungi and plant growth regulators

    Creator:
    Scagel, Carolyn F.
    Abstract:
    Many mycorrhizosphere microorganisms can produce plant growth regulating compounds in vitro. Plant growth regulating compounds are known to mediate root growth and development. In reforestation practices, conifer tree seedling growth and survival are linked to rapid root growth and development after outplanting. Multifactorial experiments were conducted to document variations in...
    Resource Type:
    Dissertation