Powdery scab, caused by Spongospora subterranea, is a worrisome disease for potato growers around the world for a variety of reasons. Powdery scab can stay present in soil for a long period of time. It has been known to persist anywhere from three to 10 years and even longer, on occasion. Spongospora can vector potato … Continue reading Powdery scab suppression remains elusive so far