Index Catalog // ScholarsArchive@OSU

Survival of Verticillium dahliae in soil

Creator:: Carlstrom, Robert Charles, 1928-
Abstract:: Three Oregon soil types (Chehalis silt loam (CSL), an alluvial soil from the Willamette Valley; Ayre sandy loam (ASL), a volcanic pumice soil from the Central high desert; and Klamath fine sandy loam (KFSL), a basaltic mineral soil from the Klamath Basin) were collected adjacent to fields which had been...
Resource Type:: Dissertation
Full Text:: OF VERTICILLIUM DAHLIAE IN SOIL Abstract approved; Redacted for Privacy R. L. Powelson Three Oregon

The influence of environment and pathogen variability on the infection of wheat by Puccinia striiformis West

Creator:: Beaver, Richard Gary, 1939-
Abstract:: Race identification of stripe rust (Puccinia striiformis West. ) is influenced by environment, pathogen variability and host age. Isolates of stripe rust were collected in the Pacific Northwest and characterized on two sets of differential varieties; the "Oregon" and the United States. Six of the seven isolates tested on the...
Resource Type:: Dissertation
Full Text:: STRIIFORMIS WEST. Abs,.ract approved: Redacted for Privacy R. L. Powelson Race identification of stripe rust

Physiologic races of strip rust (Puccinia striiformis West.) of wheat (Triticum aestivum Vill.) in the Pacific Northwest during 1971 and 1972

Creator:: Dutlu, Cevdet
Abstract:: The virulence of 44 isolates of stripe rust (Puccinia striiformis West.) from 33 collections made during 1971 and 1972 were characterized on two sets of differential varieties. The varieties in the "Oregon" set were: Cappelle Desprez, Chinese 166, Dippes Triumph, Druchamp, Etiole de Choisy, Flamingo, Gaines, Golden, Ibis, Leda, Michigan...
Resource Type:: Masters Thesis
Full Text:: WRING 1971 AND 1972 Redacted for privacyAbstract approved: R. L. Powelson The virulence of 44 isolates

Factors influencing the development of onion pink root disease incited by Pyrenochaeta terrestris (Hansen) Gorenz, Walker, Larson

Creator:: Pack, Paul Eugene
Abstract:: A study was conducted of the influence of various climatic and soil factors on the development of onion pink root disease and of the influences of temperature, light, pH, carbon and nitrogen sources, and vitamins on the growth in vitro of an Oregon isolate of the pink root fungus, Pyrenochaeta...
Resource Type:: Masters Thesis
Full Text:: PYRENOCHAETA TERRESTRIS (HANSEN) GORENZ, WALKER, L SON Abstract approved Redacted for Privacy (Major

The effects of DMSO on wound periderm formation in potato tuber tissue

Creator:: Davidson, Roy M., 1939-
Abstract:: A study was conducted to determine the influence of DMSO (dimethyl sulfoxide) on suberization and wound periderm formation in cut potato tuber tissue, and to determine the effectiveness of DMSO as a potato seedpiece treatment for prevention of seedpiece decay in the field. The influences of tuber storage conditions, varieties,...
Resource Type:: Masters Thesis
Full Text:: PERIDERM FORMATION IN POTATO TUBER TISSUE Abstract approved: Redacted for Privacy D. Robert L

Factors affecting development of iris rhizome rot caused by Botrytis convoluta Whetzel and Drayton

Creator:: Maas, J. L.
Abstract:: Abundant conidial and sclerotial production occurs on iris plants infected with Botrytis convoluta Whetzel and Drayton during the cool moist months of the year. Experiments were designed to study the survival and inoculum potential of conidia and sclerotia. Basic nutritional requirements of the fungus in culture were also studied. Results...
Resource Type:: Dissertation
Full Text:: DRAYTON Abstract approved: Robert L. Powelson Abundant conidial and sclerotial production occurs on

Etiological studies on foot rot of wheat caused by Cercosporella herpotrichoides Fron.

Creator:: Byther, Ralph S.
Abstract:: Abundant conidial production occurs from colonized straws and plants infected with Cercosporella herpotrichoides Fron during the cool moist months of the growing season. Experiments were designed to study the survival, inoculum potential and competitive saprophytic ability of conidia in soil. Laboratory results indicated that cool moist soil favors the saprophytic...
Resource Type:: Dissertation
Full Text:: Robert L. Powelson Abundant conidial production occurs from colonized straws and plants infected with

Physiologic specialization of stripe rust (Puccinia striiformis West.) in the Pacific Northwest

Creator:: Beaver, Richard Gary, 1939-
Abstract:: The physiologic specialization of nine isolates of stripe rust (Puccinia striiformis West.) collected in the Pacific Northwest was determined. The separation of races was based on the differential susceptibility of the following wheat varieties: Cappelle Desprez, Chinese 166, Dippes Triumph, Druchamp, Etoile de Choisy, Flamingo, Gaines, Golden, Ibis, Leda, Michigan...
Resource Type:: Masters Thesis
Full Text:: Velda D. Mullins for Richard Gary Beaver ACKNOWLEDGMENT I wish to thank Dr. R. L. Powelson for his

Epidemiology of stripe rust (Puccinia striiformis west.) of wheat in Oregon

Creator:: Shaner, Gregory Ellis
Resource Type:: Dissertation
Full Text:: Hansen for Gregory Ellis Shaner ACKNOWLEDGEMENTS I wish to thank Dr. R. L. Powelson for his

The identification and quantification of Pyrenochaeta terrestris (Hansen) Gorenz, Walker, and Larson, propagules in soil and onion roots

Creator:: Flota, James Ernest
Resource Type:: Masters Thesis
Full Text:: approved: Robert L. Powelson Abundant dark-brown pigmented, thick-walled, multicellular microsclerotia of

ScholarsArchive@OSU

Survival of Verticillium dahliae in soil

The influence of environment and pathogen variability on the infection of wheat by Puccinia striiformis West

Physiologic races of strip rust (Puccinia striiformis West.) of wheat (Triticum aestivum Vill.) in the Pacific Northwest during 1971 and 1972

Factors influencing the development of onion pink root disease incited by Pyrenochaeta terrestris (Hansen) Gorenz, Walker, Larson

The effects of DMSO on wound periderm formation in potato tuber tissue

Factors affecting development of iris rhizome rot caused by Botrytis convoluta Whetzel and Drayton

Etiological studies on foot rot of wheat caused by Cercosporella herpotrichoides Fron.

Physiologic specialization of stripe rust (Puccinia striiformis West.) in the Pacific Northwest

Epidemiology of stripe rust (Puccinia striiformis west.) of wheat in Oregon

The identification and quantification of Pyrenochaeta terrestris (Hansen) Gorenz, Walker, and Larson, propagules in soil and onion roots

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