Search Constraints

Start Over
Filtering by: Subject Fir -- Diseases and pests Remove constraint Subject: Fir -- Diseases and pests Degree Name Honors Bachelor of Science (H.B.S.) Remove constraint Degree Name: Honors Bachelor of Science (H.B.S.)

Search Results

  • Screening for Viral Disease in the OSU Tomato Breeding Program

    Creator:
    Kershner, Alexandria C.
    Abstract:
    Disease control is a crucial aspect of plant breeding for researchers as well as commercial producers. After samples from OSU's tomato breeding program tested positive for Columnea latent viroid in a screen done by a private company, secondary testing was done by the USDA laboratory in Corvallis which suggested that...
    Resource Type:
    Honors College Thesis
    Full Text:
    1 Screening for Viral Disease in the OSU Tomato Breeding

  • Fecundity of the aphid Rhopalosiphum padi on selected Oregon grasses

    Creator:
    Adams, Vincent T.
    Abstract:
    Barley yellow dwarf virus (BYDV) is a globally distributed pathogen of grasses that is transmitted by aphids. Little research has been done examining the response of aphids to different host grasses in naturally mixed communities. We measured the short-term fecundity of the aphid Rhopalosiphum padi, a widely distributed vector of...
    Resource Type:
    Honors College Thesis
    Full Text:
    padi, a widely distributed vector of BYDV, on a broad array of Oregon Poaceae in field and laboratory

  • Induction of apple defense genes by Erwinia amylovora and biological control agents

    Creator:
    Bauer, Lisa M.
    Abstract:
    Fire blight is a serious disease of apple and pear trees caused by the bacterium, Erwinia amylovora. This bacterium harbors a pathogenesis mechanism known as the Hrp secretory operon which induces some resistance genes and suppresses other resistance genes in the host plant following invasion. While previous researchers analyzed expression...
    Resource Type:
    Honors College Thesis
    Full Text:
    disease of apple and pear trees caused by the bacterium, Erwinia amylovora. This bacterium harbors a