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Filtering by: Subject Defoliation -- Oregon Remove constraint Subject: Defoliation -- Oregon Decade 2000-2009 Remove constraint Decade: 2000-2009

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  • The effects of defoliation on yellow starthistle (Centaurea solstitialis L.) reproductive capacity

    Creator:
    Schumacher, Stacy
    Abstract:
    Yellow starthistle (Centaurea solstitialis L.) is an introduced Asteraceae that has become established on 10 million acres in the Pacific Northwest and California. This weed functions as an annual or short-lived perennial and depends on seeds for reproduction. Strategies of control that reduce plant fitness or lower seed production or...
    Resource Type:
    Masters Thesis
    Full Text:
    plant following four different defoliation treatments in northeastern Oregon 36 6. Seedhead diameter

  • The effects of defoliation on Bromus tectorum seed production and growth

    Creator:
    Mayer, Kara Hempy
    Abstract:
    Cheatgrass (Bromus tectorum L.) is a widespread exotic weed in the Intermountain sagebrush steppe. An annual grass, it is highly prolific and very competitive with native perennial grass seedlings. A clipping experiment carried out at two cheatgrass-dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation...
    Resource Type:
    Masters Thesis
    Full Text:
    -dominated sites (Lincoln Bench and Succor Creek) in eastern Oregon analyzed effects of defoliation on