Leaf symptoms characterized by a cupped or rolled appearance - Claflin, Larry (My University, 1973)
Leaf symptoms are characterized by a cupped or rolled appearance such as shown in this rosette.
Host/Plant: Potato (Solanum tuberosum subsp. tuberosum)
Pest/Path: Bacterial Ring Rot (Clavibacter michiganensis subsp. sepedonicus)
Keywords: Potato; Ring Rot; Certification; Color photographs