Index Catalog // ScholarsArchive@OSU

Soil organic matter management and root health

Creator:: Darby, Heather
Abstract:: Annual applications of fresh or composted dairy manure were assessed for their effects on root rots of sweet corn and snap bean and damping-off of cucumber in a field soil. Soil biological and physical properties were measured as possible indicators of root rot suppressive potential. Regardless of amendment type or...
Resource Type:: Dissertation
Full Text:: my conmittee, Dr. Barbara Scraeder, Dr. Anita Azarenko, Dr. Richard Dick, and Dr. Mary Powelson. I

Sampling methods, biology and management of the mint flea beetle in central Oregon peppermint

Creator:: Morris, Mark A.
Abstract:: Sampling techniques were evaluated to quantify immature mint flea beetle (MFB), Longitrsus waterhousei Kutschera (Coleoptera: Chrysomelidae), on peppermint (Mentha piperita L.), in central Oregon. During the study period, 1985-1988, soil samples of 350 cm³ were effective for collecting immature MFB. Sifting soil samples through screens was effective for estimating post-feeding...
Resource Type:: Masters Thesis
Full Text:: E. Sampling techniques were evaluated to quantify immature mint flea beetle (MFB), Longitrsus

Possible associations between three procedures to measure noodle starch quality in winter wheat (Triticum aestivum L.)

Creator:: Weight, Chris (Christopher Thompson)
Abstract:: Until recently, the viscoamylograph had been the primary method for measuring starch as it relates to noodle quality in wheat. This method requires a large sample of flour and is time consuming. With the introduction of the rapid visco-analyser (RVA) in 1986 and the more recent flour swelling volume procedure,...
Resource Type:: Masters Thesis
Full Text:: .) Abstract approved: Warren E. Kronstad Until recently, the viscoamylograph had been the primary method for

Nuclear and chloroplast diversity of Pacific Northwest wheat (Triticum aestivum) breeding germplasm

Creator:: Edwards, Melanie Love
Abstract:: Wheat breeders must effectively maintain and manage existing genetic diversity in order to continue the development of superior genotypes. It is therefore fundamental that the genetic relationships and diversity within the germplasm pools be thoroughly characterized and understood. Recently, DNA-based markers have provided powerful tools for genetic diversity analysis. This...
Resource Type:: Masters Thesis
Full Text:: . Mary Powelson for serving on my committee. I would also like to thank Christy Watson for the hours of

Nitrogen dynamics in field grown comice pears

Creator:: Sanchez, Enrique E.
Abstract:: The dynamics of N was studied in field grown Comice/Provence quince BA29 pears in Medford, Oregon. Total tree biomass, N content, and ¹⁵N evaluations suggest that young pears require little N (48 kg N ha⁻¹ yr⁻¹). About 45% of total tree N present in dormant trees was remobilized into new...
Resource Type:: Dissertation
Full Text:: E. Sanchez and Viki Freeman Typed by DEDICATION This thesis is dedicated to my children

Influence of site, soil, and inoculum density on dwarf bunt (Tilletia controversa Kühn) of winter wheat

Creator:: Clark, Deborah Ann, 1954-
Abstract:: Field microplot studies conducted over two seasons (1982-1984) evaluated the influence of four physically and chemically diverse soils collected from Pacific Northwest wheat fields on the incidence of dwarf bunt of winter wheat caused by Tilletia controversa Kuhn. These soils were placed at Flora and Pendleton, Oregon to determine the...
Resource Type:: Masters Thesis
Full Text:: % nonsteri 1 e soil to 3 of the 4 fumigated soils reduced but never significantly (P < 0.05) decreased

Influence of nitrogen form ratio and calcium on greenhouse and field performance of watermelon

Creator:: Lamb, Michael J.
Abstract:: Watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai var. Crimson Sweet) was seeded in a commercial peat mix in multicell containers (72 cells-tray⁻¹, 40 cm³-cell⁻¹) in July 1989 and April 1990. In 1989, the medium was amended with CaC0₃ at 10% w:v. In 1990, no CaC0₃ amendment was made. Watermelon seedling...
Resource Type:: Masters Thesis
Full Text:: along the way. I am indebted to my committee members Drs. Del Hemphill and Mary Powelson for their

Influence of genetic factors and pollination on fruit firmness in parthenocarpic and nonparthenocarpic pickling cucumbers

Creator:: Cook, Kevin L., 1967-
Abstract:: A concern which has restricted the use of parthenocarpic pickling cucumbers in the United States has been firmness of fruit processed by brining. Fruit firmness and defects of parthenocarpic and nonparthenocarpic pickling cucumbers were evaluated in 1992 and 1993. Fruits were produced with or without pollination by growing plants with...
Resource Type:: Dissertation
Full Text:: assistance and help with the donor allele analysis, Dr. Mary Powelson for serving as my minor professor

Genetic analysis of catechol siderophore by Erwinia carotovora

Creator:: Bull, Carolee Theresa, 1962-
Resource Type:: Dissertation
Full Text:: Erwinia carotovora Abstract approved: Dr. Joyce E. Loper Twenty-two strains of Erwinia carotovora

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

Creator:: Garrett, Karen A.
Abstract:: Most studies of plant disease epidemiology have focused on epidemics in host populations composed of a single genotype. But crop plant diversity can be a useful means of improving the deployment of resistance genes. In a series of experiments with wheat stripe rust and potato late blight, we studied factors...
Resource Type:: Dissertation
Full Text:: , Ken Johnson, Mary Powelson, and Tim Schowalter, for their support in the preparation of this work

ScholarsArchive@OSU

Soil organic matter management and root health

Sampling methods, biology and management of the mint flea beetle in central Oregon peppermint

Possible associations between three procedures to measure noodle starch quality in winter wheat (Triticum aestivum L.)

Nuclear and chloroplast diversity of Pacific Northwest wheat (Triticum aestivum) breeding germplasm

Nitrogen dynamics in field grown comice pears

Influence of site, soil, and inoculum density on dwarf bunt (Tilletia controversa Kühn) of winter wheat

Influence of nitrogen form ratio and calcium on greenhouse and field performance of watermelon

Influence of genetic factors and pollination on fruit firmness in parthenocarpic and nonparthenocarpic pickling cucumbers

Genetic analysis of catechol siderophore by Erwinia carotovora

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

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