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ARS Home » Pacific West Area » Corvallis, Oregon » Forage Seed and Cereal Research Unit » Research » Publications at this Location » Publication #336994
Title: Powdery mildew reaction of hop cultivars and USDA germplasm, 2015

Author
item WOLFENBARGER, SIERRA - Oregon State University
item TWOMEY, MEGAN - Oregon State University
item Gent, David - Dave

Submitted to: Plant Disease Management Reports
Publication Type: Other
Publication Acceptance Date: 1/20/2017
Publication Date: 3/7/2017
Citation: Wolfenbarger, S.N., Twomey, M.C., Gent, D.H. 2017. Powdery mildew reaction of hop cultivars and USDA germplasm, 2015. Plant Disease Management Reports. 11:V049.

Interpretive Summary: Powdery mildew is an important disease of hop. This research was conducted to identify possible sources of resistance to the disease in publicly-available germplasm and cultivars. We screened germplasm and cultivars in the USDA collection for their reaction to three strains of the powdery mildew fungus that occur in the Pacific Northwestern U.S., the primary production region for hops in the U.S. Numerous sources of resistance to the disease were identified. These findings are important because it will accelerate development of new, disease-resistant cultivars.

Technical Abstract: This research was conducted to identify possible sources of resistance to the disease powdery mildew in publicly-available hop germplasm and cultivars. Germplasm with the highest levels of downy mildew resistance in the USDA collection and various cultivars of interest were screened for their reaction to three strains of the powdery mildew fungus that occur in the Pacific Northwestern U.S. Numerous sources of resistance to the disease were identified.