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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:: Disease Incited By Pyrenochaeta Terrestris (Hansen) Gorenz, Walker, Larson AN ABSTRACT OF THE THESIS OF

Creator:: Flota, James Ernest
Resource Type:: Masters Thesis
Full Text:: terrestris (Hansen) Gorenz, Walker, and Larson, propagules in soil and onion roots AN ABSTRACT OF THE

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:: . The multinucleate nature of Botrytis cinerea spores was shown by Barnes (1930) and Hansen (1938) to

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: Powelson, 1973b; Magnus and Hansen, 1973). The maximum management boundaries for foot rot are therefore

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:: Typed by Gwendolyn Hansen for Ralph Sumner Byther ACKNOWLEDGEMENTS I wish to thank Dr. R. L

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

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