Index Catalog // ScholarsArchive@OSU

Histological comparisons of needle tissues of four species of white pine infected by Cronartium ribicola

Creator:: Sweeney, Katarina
Abstract:: Hypersensitive response-like (HR-like) needle reactions to infection by the white pine blister rust pathogen, Cronartium ribicola, have been reported for several species of five needle pines native to western North America. The best-studied examples are in Pinus monticola and P. lambertiana. In these species a "needle spot" phenotype has been...
Resource Type:: Masters Thesis
Full Text:: . lambertiana. In these species a “needle spot” phenotype has been identified in which HR-like needle

Development of a new molecular diagnostics tool for Agrobacterium tumefaciens

Creator:: Fuller, Skylar, Savory, Elizabeth, Weisberg, Alex, and Chang, Jeff
Abstract:: Agrobacterium tumefaciens causes the economically important plant disease, crown gall. These galls are the result of abnormal growth that manifests itself on either the root or the stem and can be devastating for the ornamental plant industry. Introduction of A. tumefaciens to a nursery can be highly detrimental and thus...
Resource Type:: Poster
Full Text:: abnormality known as a root or crown gall (Figure 1). These galls are the result of abnormal growth that

Characterizing novel bacterial isolates that inhibit the growth of gall-forming phytopathogenic bacteria

Creator:: Belcher, Michael S.
Abstract:: Agrobacterium tumefaciens and Rhodococcus fascians are plant pathogenic bacteria that can induce crown and leafy galls on plants, respectively. Infection by these bacteria results in disfigured, unsellable plants, leading to significant economic losses to the nursery industry. A. tumefaciens and R. fascians are capable of infecting a broad range of...
Resource Type:: Poster
Full Text:: isolates that inhibit the growth of gall-forming phytopathogenic bacteria Michael S. Belcher1, Elizabeth A

Daniel Bacher Continuing Researchers Support Program Final Report

Creator:: Bacher, Daniel
Abstract:: Final report for project completed with funding from the Oregon State University Agricultural Research Foundation Continuing Researchers Support Program.
Resource Type:: Technical Report
Full Text:: , and have therefore reached a significant milestone on objective one. It still remains to be seen if

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Creator:: Boudreau, Mark Alan, 1958-
Abstract:: Experiments were performed to determine the nature of maize influence on bean disease in additive-type intercrops. Overall effects of intercrops on angular leaf spot (caused by Phaeoisariopsis griseola) in Kenya indicated >23% reductions (P<0.05) in area under the disease progress curve (AUDPC) in two of three season-site combinations. Fertilization tended...
Resource Type:: Dissertation
Full Text:: spot and rust of beans AN ABSTRACT OF THE THESIS OF Mark A. Boudreau for the degree of Doctor of

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Creator:: Rivedal, Hannah M.
Abstract:: Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley for edible seed, frozen foods, and fresh markets is susceptible to an undiagnosed soilborne disease. Diseased squash fields exhibit symptoms of stunting, root and crown rot, vascular discoloration, and late-season wilt, which in extreme cases can lead to total crop failure....
Resource Type:: Dissertation
Full Text:: help. Cheers to a future together! CONTRIBUTION OF AUTHORS Dr. Johnson

Development and control of benomyl-tolerant Botrytis cinerea strains on snap beans (Phaseolus vulgaris)

Creator:: Johnson, Earl Ray
Abstract:: Benomyl-tolerant Botrytis cinerea was found in snap bean fields throughout the Willamette Valley while no tolerant isolates of Whetzelinia sclerotiorum were detected. Thirty-five benomyl-tolerant isolates of B. cinerea had slower radial growth rates than eighteen benomyl-sensitive isolates. Sporulation of an aggressive tolerant isolate was not stimulated when grown on benomyl-treated...
Resource Type:: Masters Thesis
Full Text:: Earl Ray Johnson A THESIS submitted to Oregon State University in partial fulfillment of the

Genetic variability in the eastern filbert blight pathosystem

Creator:: Osterbauer, Nancy K.
Abstract:: The heritability of resistance to eastern filbert blight, caused by Anisogramma anomala, in European hazelnut (Corylus avellana) was evaluated in the progeny of seven cultivars crossed in 12 combinations. Progeny produced by crossing 'VR6-28' with three susceptible cultivars segregated 1:1 for complete resistance to eastern filbert blight. Histograms of disease...
Resource Type:: Dissertation
Full Text:: ., Sunderland, MA. 15. Johnson, K. B., Mehlenbacher, S. A., Stone, J. K., and Pscheidt, J. W. 1996

Epiphytic yeasts isolated from apple leaves to control of gray and blue mold fruit rots of apple

Creator:: Falconi, Cesar E.
Abstract:: Eight phylloplane yeasts were isolated from backyard apple trees in Corvallis, OR. Yeast isolates were classified to genus or species level. All isolates were tested in vitro for antagonistic activity against the postharvest pathogens Botrytis cinerea and Penicillium expansum. Of these isolates, Aureobasidium pullulans, Sporobolomyces roseus Rhodotorula sp., consistently reduced...
Resource Type:: Masters Thesis
Full Text:: germination of B. cinerea and P. expansum in a gradient of apple juice concentrations and to suppress

Assessment of potato tuber blight caused by Phytophthora infestans

Creator:: Glass, Jenny Rebecca
Abstract:: Late blight, caused by Phytophthora infestans, is a devastating problem to potato production in many parts of the world. While the foliar phases of this disease are well characterized, tuber infection, leading to quality losses and disease perpetuation, is less well understood. Experiments were conducted during 1998 and 1999 in...
Resource Type:: Masters Thesis
Full Text:: infestans, is a devastating problem to potato production in many parts of the world. While the foliar

ScholarsArchive@OSU

Histological comparisons of needle tissues of four species of white pine infected by Cronartium ribicola

Development of a new molecular diagnostics tool for Agrobacterium tumefaciens

Characterizing novel bacterial isolates that inhibit the growth of gall-forming phytopathogenic bacteria

Daniel Bacher Continuing Researchers Support Program Final Report

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Development and control of benomyl-tolerant Botrytis cinerea strains on snap beans (Phaseolus vulgaris)

Genetic variability in the eastern filbert blight pathosystem

Epiphytic yeasts isolated from apple leaves to control of gray and blue mold fruit rots of apple

Assessment of potato tuber blight caused by Phytophthora infestans

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