Physiological shothole is an environmental disorder and does not warrant any chemical control. It is
thought to be caused by stress. Physiological 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."
Remove and destroy infected plant parts as soon as symptoms appear. Keep
plants healthy by providing proper cultural care.
Physiological shothole on plum