Toxins injected while feeding cause leaves to cup and be misshapen. These leaves are often in the top of the vine and are quite obvious, especially at the end of the growing season. Adult These are three of the most common leafhoppers found on grapes in Ohio and they belong to the same genus Erythroneura . These three species vary in their coloration and markings. E. comes is pale yellow or white with yellow, red, and blue markings.
Overwintering adults are often nearly all red.
E. tricincta is brown and black with touches of orange on the wings. E. ziczac is pale yellowish or white with a zigzag stripe down each wing and cross veins distinctly red. The biology of these three species is similar. They overwinter as adults in sheltered places such as the remains of old plants. During the first warm spring days the leafhoppers become active, and they feed on the foliage of many different plants until grape leaves appear.