Leaves produced in spring are thickened, curled, and colored red or yellow instead of normal green. Severely affected shoots die. Irregular, reddish lesions are sometimes seen on fruit. Badly diseased leaves fall by early summer, and repeated infections debilitate trees and kill branches. After fall and winter rains, spores (blastospores) of the fungus might be observed as a white bloom on the surface of leaves and be found on twigs, buds, and inbetween bud scales.