Apricots are immune. It is one of the most common diseases of these fruits. It causes the leaves to curl and turn reddish in color. A severe infection can cause reduced yields. Symptoms and Diagnosis Symptoms first appear in spring.
New leaves become curled and develop reddish areas.
The reddish areas become thickened and puckered resulting in severely distorted leaves. As the disease progresses the thickened areas turn yellowish grey and become covered with velvety spores. Affected leaves turn yellow or brown and fall prematurely. Affected shoots usually send out new leaves which often are unaffected by the disease unless rainy weather ensues. In more severe infections shoots may become thickened and die.