For younger trees, paint trunks white or apply wrap to prevent sunscald (right).
Fruit
Possible late season cold injury damage to apple.
Stink and lygus bugs puncture-type feeding results in deep pits whose symptom is known as “cat-facing.”
Honeycrisp apples have a soft flesh, and are prone to diseases like bitter rot.
A dry rot may develop on the calyx end of fruit, mostly introduced by insect feeding.
General fruit cracking is common and its cause is not well-understood.
"Jonathon spot" occurs on Jonathon Rome, Gravenstein, and other varieties. Its cause is unknown.
Thrips are tiny insects that can lay eggs on the developing apple, causing a “pansy” shaped spot.
Frost injury often appears as a circular ring of russet around the apple.
Light frost damage will show up as a ring of small lesions around the bottom of the apple.
Some nutrient or pesticide sprays can puddle at the stem end, and cause russeting of the fruit skin.
Appleleaf and pearleaf (shown here) blister mites cause brown to black raised bumps on foliage.
