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Filtering by: Alternative title ssim Forest statistics for County, Oregon Remove constraint Alternative title ssim: Forest statistics for County, Oregon Degree Field Botany and Plant Pathology Remove constraint Degree Field: Botany and Plant Pathology Subject Phytophthora ramorum Remove constraint Subject: Phytophthora ramorum

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  • Susceptibility of coast redwood seedlings to Phytophthora ramorum

    Creator:
    Lucas, Sunny L.
    Abstract:
    Coast redwood (Sequoia sempervirens) (D. Don) Endl. is a host for Phytophthora ramorum but it was unclear if the pathogen represents a significant disease risk to this tree species. In this study the susceptibility of coast redwood seedlings and the likelihood of sporulation on redwood were examined. Two methods were...
    Resource Type:
    Masters Thesis
    Full Text:
    experiments were set up in infested areas of the redwood forest in southern Humboldt County, CA. For the

  • The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

    Creator:
    Collins, Bradley R.
    Abstract:
    Tanoak (Lithocarpus densiflorus), along with some other members of Fagaceae, are susceptible to sudden oak death caused by the oomycete Phytophthora ramorum. Symptoms of the disease include dying crowns, bleeding cankers, and eventually death of infected trees. The cause of mortality is not well understood, but recent research indicates that...
    Resource Type:
    Masters Thesis
    Full Text:
    closely related to another Oregon forest pathogen, P. lateralis (Cooke, et al, 2000). The most widely

  • Histological examination of Phytophthora ramorum in Notholithocarpus densiflorus bark tissues

    Creator:
    Botts, Molly M.
    Abstract:
    Colonization of N. densiflorus tissues by P. ramorum is not well understood. The pathogen is able to colonize nearly all tissues of this host but it is unclear how a tree is ultimately killed. Because this is such a destructive invasive pathogen, it is important to investigate its pathogenic strategy....
    Resource Type:
    Masters Thesis
    Full Text:
    here and earn a Master's degree. Oregon State University for providing tuition coverage and

  • Biology of chlamydospores of Phytophthora ramorum

    Creator:
    Smith, Aaron Lee
    Abstract:
    The chlamydospore is a survival spore produced by 35 of the 75 described species of Phytophthora. Phytophthora ramorum Werres, de Cock & Man in't Veld, the causal agent of Sudden Oak Death (SOD), produces abundant chlamydospores in artificial culture and plant tissue. The chlamydospore is likely the most important survival...
    Resource Type:
    Masters Thesis
    Full Text:
    submitted to Oregon State University in partial fulfillment of the requirements for the