It appears as a dusty white-gray or greenish-white coating on leaf surfaces or other above-ground plant parts. The disease is most commonly observed on the upper surfaces of leaves , but can also affect the lower leaf surface, young stems, buds , flowers, canes, and young fruit. Severely infected leaves may exhibit mottling or deformity, including leaf curling and withering. Infected fruit turn grayish-white at first and ultimately exhibit a brown russeted appearance. Infected fruit may crack, shrivel, or drop from clusters.