These symptoms may spread to lower leaves. Plants infected late in the season may have no visible symptoms. Potato leafroll virus. Note the upright growing habit and rolled leaves. When an infected tuber produces a plant, the plant is very stunted and rigid.
Leaves are stiff, dry, and leathery.
When crushed in the hand, the leaves crackle. Lower leaves roll and may be pink or dead at the margins. Leaves higher in the plant are slightly pale. When a tuber grown on an infected plant is cut open, a light to dark brown net-like pattern may be visible in some cultivars. If the tuber sprouts, the sprout may be long and spindly.