Management Strategies for Hop Downy Mildew Utilizing Fungicides and Host Resistance
2017-07
View/Download File
Persistent link to this item
Statistics
View StatisticsJournal Title
Journal ISSN
Volume Title
Title
Management Strategies for Hop Downy Mildew Utilizing Fungicides and Host Resistance
Authors
Published Date
2017-07
Publisher
Type
Thesis or Dissertation
Abstract
Hop (Humulus lupulus L.) is an herbaceous perennial plant species that is native to the Northern hemisphere. The hop inflorescences are utilized during the production of beer. Commercial production of hops requires the use of fungicides and host resistance to retain high overall yields and quality characteristics that brewers are satisfied with. The primary objectives of this research were to determine effective fungicidal compounds that can be used to control hop downy mildew (caused by Pseudoperonospora humuli (Miy. et Takah.) Wils.) and to collect and characterize a panel of 112 diverse H. lupulus accessions for resistance to P. humuli. Results from field fungicide trials indicate that significant interactions exist between cultivars, environments, and fungicidal compounds with regards to disease severity. With regards to host resistance, H. lupulus var. lupuloides E. Small accessions originating from the United States were highly-resistant to P. humuli compared to their North American counterparts H. lupulus var. neomexicanus Nelson & Cockerell or H. lupulus var. pubescens E. Small. Comparisons of H. lupulus var. lupuloides from Canada indicated that accessions from the United States were significantly more resistant to P. humuli, but not significantly different from H. lupulus var. lupulus accessions originating from Kazakhstan. These results indicate that control of hop downy mildew can be accomplished through use of resistant cultivars, fungicidal compounds, and selection of proper environments for cultivation. Additionally, utilization of H. lupulus var. lupuloides will increase the diversity of resistant sources to hop downy mildew in the development of new cultivars.
Description
University of Minnesota M.S. thesis. July 2017. Major: Plant Pathology. Advisors: Angela Orshinsky, James Bradeen. 1 computer file (PDF); viii, 101 pages.
Related to
Replaces
License
Series/Report Number
Funding information
Isbn identifier
Doi identifier
Previously Published Citation
Suggested citation
Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.