Worse in wet years. New shoots may be blighted or distorted. Branches may develop cankers and die. If infection is severe for several years, the tree may begin to decline. Clean fallen leaves and prune dead branches.
Resistant varieties are available .
To be effective, fungicides must be applied before symptoms are seen. Sprays should begin at bud break and continue on a 10 to 14 day interval through the period of spring rains. Feeding causes stippling of foliage. New leaves may be distorted or have holes. Does not affect tree vigor.