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  • Identifying site characteristics that explain variation in Douglas-fir site productivity and stem form

    Creator:
    Magalska, Lauren E.
    Abstract:
    Foresters care about site productivity and stem quality in Douglas-fir plantations for many reasons. The profitability of forest land and the economic returns on silvicultural investments are directly related to site productivity. Thus, understanding the relationships among Douglas-fir productivity, stem form and site characteristics is important economically. My objective was...
    Resource Type:
    Masters Thesis
    Full Text:
    Stem Form. Abstract approved: Glenn T. Howe Foresters care about site productivity and

  • Phenology and monitoring of the cabbage maggot, Delia radicum (L.), in brassica root crops

    Creator:
    Dreves, Amy J.
    Abstract:
    In Oregon’s northern Willamette Valley, cabbage maggot (CM), Delia radicum (L.) (Diptera: Anthomyiidae) often renders Brassica root crops unmarketable. Scheduled insecticides are the only current control. Studies were conducted to: 1) describe and characterize spring emergence of CM flies and their seasonal flight activity relative to degree-day (DD) accumulations; 2)...
    Resource Type:
    Dissertation
    Full Text:
    this doctorate possible. First to my advisor, Dr. Glenn Fisher, for his support, encouragement

  • A study of the effectiveness of using distance education to present training programs to Extension Service Master Gardener trainees

    Creator:
    Rost, Robert C.
    Abstract:
    Despite the availability of distance education technology, Oregon State University Extension Service educators have made limited use of this equipment for delivery of educational programs to clients of the state's 36 county Extension Service offices. Some Extension educators may be hesitant to use distance technology because they are unsure whether...
    Resource Type:
    Dissertation
    Full Text:
    Service Master Gardener Trainees <- Abstract approved: Glenn Klein Despite the availability of

  • Projecting White Pine Blister Rust Hazard Ratings Under Climate Change in Southwestern Oregon

    Creator:
    Cicekli, Zeynep
    Abstract:
    Sugar pine and western white pine are widely distributed, economically valuable, and ecologically important native tree species in North America. However, white pine blister rust (WPBR), caused by a non-native fungal pathogen, Cronartium ribicola J.C. Fisch. in Rabh., has substantially affected populations of these species. Cronartium is an obligate parasite,...
    Resource Type:
    Masters Thesis
    Full Text:
    . Abstract approved: ______________________________________________________ Glenn T. Howe Sugar pine

  • Early genetic selection for wood stiffness in juvenile Douglas-fir and western hemlock

    Creator:
    Urhan, Oguz S.
    Abstract:
    Wood modulus of elasticity (MOE), also known as wood stiffness, is one of the most important wood properties. Wood stiffness is a measure of the resistance to deflection, and is important because some products such as laminated veneer lumber, plywood, and dimension lumber require stiff and strong wood. Incorporating wood...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Glenn T. Howe Wood modulus of elasticity (MOE), also known as wood stiffness, is one of

  • Stiffness of Douglas-fir lumber : effects of wood properties and genetics

    Creator:
    Vikram, Vikas
    Abstract:
    Wood stiffness is one of the most important properties of lumber and veneer. We studied wood stiffness (modulus of elasticity, MOE), wood density, microfibril angle, and knots in a 25 year-old wind pollinated progeny test (50 families, ~ 373 trees) of coastal Douglas-fir to understand the potential for genetically improving...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Glenn T. Howe Wood stiffness is one of the most important properties of lumber and veneer

  • Douglas-fir Seedlings in the Pacific Northwest: The Genetics of Drought Adaptation

    Creator:
    Celer, Erda
    Abstract:
    Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically important, and commercially valuable tree species in North America. However, climate change is expected to adversely impact Douglas-fir trees, and assisted migration may become necessary to lessen the effects of climate change. Because drought stress is one of the projected effects of...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Glenn Thomas Howe Douglas-fir (Pseudotsuga menziesii) is a widely distributed, ecologically

  • Climate-based Seed Deployment Zones for the Pacific Northwest

    Creator:
    McClure, Meridith L.
    Abstract:
    Native populations of forest trees are specifically adapted to the climates they inhabit. The farther trees are moved from their local climates (i.e., as the climatic transfer distance increases), the more growth and survival tend to decrease. The transfer limit is the climatic transfer distance beyond which plantation performance is...
    Resource Type:
    Masters Thesis
    Full Text:
    : ______________________________________________________ Glenn T. Howe Native populations of forest trees are specifically adapted to the

  • Tactics for enhancing conservation biological control of twospotted spider mites, Tetranychus urticae Koch, in Pacific Northwest hop yards

    Creator:
    Woods, Joanna L.
    Abstract:
    The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is a worldwide pest of numerous agronomic and horticultural plants. Conservation biological control of this pest can be unreliable due to asynchrony of natural enemies and certain horticultural practices that have a direct or indirect affect on natural enemies and the...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Glenn C. Fisher The twospotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae

  • Societal Responses to Using Genetic Engineering for Mitigating Chestnut Blight and Restoring American Chestnut Trees

    Creator:
    Petit, Joshua D.
    Abstract:
    Forests face health threats from pests and diseases (e.g., mountain pine beetle, emerald ash borer, chestnut blight [CB], Swiss needle cast), and other issues such as climate change. Interventions such as genetic engineering (GE) have shown promise for mitigating some of these threats. CB, for example, has impacted most American...
    Resource Type:
    Dissertation
    Full Text:
    his unending support, and truly consider him my mentor and friend for life. Dr. Glenn Howe, the Co