Vegetable Disease Supplement #8
Late blight genotype US-24 has been characterized from a potato field in Adams Co. This field is just over the county line from Waushara. 24 is resistant to mefenoxam (Ridomil). The presence of both 23 and 24 in the region suggests multiple potential sources and the need for further sampling/testing.
Dr. Amanda J. Gevens
Extension Plant Pathologist in Potatoes & Vegetables
University of Wisconsin
Department of Plant Pathology
1630 Linden Dr., Rm. 689
Madison, WI 53706-1598