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- W777715242 abstract "EPIDEMIOLOGY OF USTILAGO BULLATA BERK. ON BROMUS TECTORUM L. AND IMPLICATIONS FOR BIOLOGICAL CONTROL Toupta Boguena Department of Integrative Biology Doctor of Philosophy The seedling-infecting pathogen Ustilago bullata Berk. is a naturally occurring biological control agent for cheatgrass (Bromus tectorum L.). The effects of temperature and nutrients on pathogen teliospore germination behavior and the effects of temperature on host seed germination were examined. The effects of temperature on sporidial proliferation, host infection in a temperature-controlled environment and in a field setting for eight populations were investigated. The infection success of Ustilago bullata on Bromus tectorum in cultivated fields as a function of seeding date, inoculation method, inoculum density, supplemental watering, and litter was also investigated. Teliospores germinated faster on potato dextrose agar than on water agar. Teliospores germinated slowly at temperatures far from the optimum of 15 and 20C. There were amongpopulation variations in teliospore germination and sporidial proliferation, but differences among populations were much more pronounced at temperatures below 15C. Infection" @default.
- W777715242 created "2016-06-24" @default.
- W777715242 creator A5016532769 @default.
- W777715242 date "2003-01-01" @default.
- W777715242 modified "2023-09-27" @default.
- W777715242 title "Epidemiology of Ustilago bullata Berk. on Bromus tectorum L. and Implication for Biological Control" @default.
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- W777715242 hasPublicationYear "2003" @default.
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