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Subject: Bacterial ring rot of potato found in Prince Edward Island seed potatoes
Date posted: January 07, 2003
Source: ProMed
The Canadian Food Inspection Service rejected seed potatoes from a number of Prince Edward Island seed potato farms because of bacterial ring rot, Clavibacter michiganensis subsp. sepedonicus, detections. There is zero tolerance for ring rot in the seed production trade because the bacterium can spread from infected seed potatoes into the daughter tubers. Rejected potatoes can be used for consumption or processing. Strict sanitation measures and a three year rotation out of potatoes is recommended to control future outbreaks. Ring rot is established in parts of the United States and the former Soviet Union as well as Northern and Eastern Europe. Losses are reported as high as 50% in some areas.