It produces yellowish blotches and rings on leaves but it does not cause much damage Infected plants are not dwarfed or deformed. Crown elongation, another virus disease, causes many long branched crowns to develop from the tubers. Plants develop many slender, weak shoots. These dwarfed shoots produce no flower buds. Leaf curl, or curly leaf, virus causes plants to become dwarfed.
Leaves grow close together on the stem and curl up.
Leaf surfaces crinkle. No flower buds form. QDig up and burn plants infected with any of the virus diseases. Where trade names are used, no discrimination is intended and no endorsement by Cooperative Extension is implied.