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Filtering by: Subject Potatoes -- Oregon -- Willamette River Valley -- Fertilizers Remove constraint Subject: Potatoes -- Oregon -- Willamette River Valley -- Fertilizers Advisor Mallory Smith, Carol Remove constraint Advisor: Mallory Smith, Carol Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • Response of Roughstalk Bluegrass (Poa trivialis L.) to Waterlogging Stress

    Creator:
    Liu, Mingyang
    Abstract:
    Roughstalk bluegrass (Poa trivialis L.) (RB) is a weed species that increased very quickly in grass seed production fields of the Willamette Valley. The invasion of RB in grass seed crops often occurs in waterlogged soils. In waterlogged areas, RB exhibited better competitiveness and had greater population densities than other...
    Resource Type:
    Dissertation
    Full Text:
    ..................................................................................1 Grass seed production in Oregon and Willamette Valley ..................................1 Poa

  • Glyphosate-resistance in Italian ryegrass (Lolium multiflorum): evaluation and investigation of the mechanisms of resistance

    Creator:
    Perez-Jones, Alejandro
    Abstract:
    A suspected glyphosate-resistant Italian ryegrass (Lolium multiflorum) (OR) population was collected from a filbert (Corylus avellana L.) orchard near Portland, OR. Based on the dose-response experiments conducted in the greenhouse, it was found that the suspected glyphosate-resistant population was approximately fivefold more resistant to glyphosate than the susceptible (S) population....
    Resource Type:
    Dissertation
    Full Text:
    susceptible Italian ryegrass biotype collected in the Willamette Valley, OR, was included as a control