Ph.D. Research: Downy mildew of hop
- B.S., Environmental Science, Montana State University
Hop is grown on 1,033 commercial acres in Michigan, making the state the largest producer of hop outside the Pacific Northwest states. However, the revitalization of Michigan hop production has been challenged by the annual occurrence of the disease hop downy mildew. The efficacy of disease control strategies is often heavily influenced by environmental conditions and characteristics of downy mildew pathogen populations. Michigan’s climate is humid and the environmental conditions that favor disease development are likely to persist throughout the entire growing season. Further, populations of the hop downy mildew pathogen, Peronospora humuli, have been shown to differ in fungicide sensitivity, virulence, sexual reproduction and genetic diversity in various production regions. I am interested in both the evaluation of current management tools under Michigan conditions and the characterization of Michigan P. humuli populations. My goal is to help improve Michigan hop production practices and to further the collective understanding of this impactful disease.
Higgins, D.S., and Hausbeck, M.K. 2017. Fungicides and hop cultivars can limit hop downy mildew (Pseudoperonospora humuli) in Michigan. Abstract. Phytopathology 107(12S):S5-78.
Higgins, D., and Hausbeck, M. 2017. Fungicides and hop cultivars can limit hop downy mildew. Vegetable Grower News, Dec: 40-41.
Lizotte, E., Hausbeck, M., Higgins, D., Darby, H., and Gent, D. 2017. Powdery mildew arrives in Michigan hopyards. MSU Extension News for Agriculture-Vegetables: 20 Jun.
Del Castillo Munera, J., Higgins, D., Harlan, B., and Hausbeck, M. 2016. Occurrence and management of hop (Humulus lupulus) powdery mildew (Podosphaera macularis) in Michigan. Phytopathology 106 (Suppl.):S4.187.
Brown-Rytlewski, D., Hausbeck, M., Higgins, D., Lizotte, E., and Sirrine, R. 2016. Pesticides registered for use on hops in Michigan 2016. Michigan State University Extension Publication.
Hausbeck, M., Higgins, D., and Lizotte, E. 2016. Controlling downy mildew on hop. MSU Extension News for Agriculture-Vegetables:6 May.
Higgins, D., and Krokowski, K. 2012. Using crop rotation in the home vegetable garden. University of Wisconsin Garden Facts XHT1210.
Higgins, D. 2007. Impacts of elevated CO2 on plants and their root symbionts, arbuscular mycorrhizal fungi, in Yellowstone National Park. (Poster) Soil Ecology Society Meeting, Moab, UT.