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  • Hybridization between yellow starthistle (Centaurea solstitialis) and meadow knapweed (Centaurea x moncktonii)

    Creator:
    Miskella, John
    Abstract:
    Centaurea solstitialis L. (yellow starthistle) and C. × moncktonii Britt. (meadow knapweed) are members of the genus Centaurea in the Asteraceae family. Both species have become serious management concerns as invasive species in North America, often displacing native vegetation and costing land managers millions of dollars to eradicate. Seven plants...
    Resource Type:
    Masters Thesis
    Full Text:
    United Kingdom and northern Europe. In Oregon, yellow starthistle is established in eastern and

  • 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:
    northeastern Oregon 47 14. Percent infestation of yellow starthistle seedheads of biological control agents

  • Yellow starthistle, Centaurea solstitalis

    Creator:
    Oregon State University. Extension Service
    Abstract:
    Yellow starthistle, a native of the Mediterranean region, arrived in this country in 1869 as a contaminant in alfalfa seed. It is a strong invader of disturbed areas, rangelands, and roadsides and thrives in areas of summer drought. A yellow starthistle invasion will reduce biodiversity by choking out native plants....
    Resource Type:
    Technical Report
    Full Text:
    biological control insects have been released in the United States for yellow starthistle control: • The