Noninfectious plum shothole causes reddish or purplish brown spots about 0.10 inch in diameter on leaves. The spots expand and their centers turn brown. Tiny, dark specks form in the brown centers, especially on buds. Spots on young leaves have a narrow, light green or yellow margin and their centers often fall out as leaves expand, leaving "shot holes."
Solutions
Noninfectious plum shothole is a physiological disorder and does not warrant any chemical control. Remove and destroy infected plant parts as soon as symptoms appear.
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