Fig. 1. Belowground portions of the potato plant are often infected by the potato wart pathogen. Following infection by the potato wart pathogen, meristematic tissues are transformed into large warty galls on the lower stems and tubers. The true roots of the potato plant are not known to be infected. (Photo by R. Zachmann from the APS digital CD Fundamental Fungi 2002.)
Potato Wart
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