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Identification of the G143A Mutation in Cytochrome b Associated with QoI Resistance in Cercospora beticola Isolates from the Red River Valley

M. D. Bolton, V. Rivera-Varas, G. A. Secor, A. W. Cattanach, and M. S. Metzger

August 2013


Cercospora leaf spot (CLS) is the most important foliar disease of sugarbeet. The disease is managed in part by timely applications of quinone outside inhibitor (QOI) fungicides. To assess whether QOI resistance has developed in C. beticola in the Red River Valley (RRV) of Minnesota and North Dakota, real-time PCR was used to determine whether the G143A mutation could be identified in RRV samples.


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