Frost injury often appears as a circular ring of russet around the apple.
Fruit
Some nutrient or pesticide sprays can puddle at the stem end, and cause russeting of the fruit skin.
Birds are becoming more and more of a problem in orchards.
The rot introduced by codling moth can also be dry and firm.
Powdery mildew causes lace-like russeting on fruit.
Earwig feeding. Not the black dot (excrement) inside the hole, which helps to identify earwig feeding.
Codling moth can introduce fungi or bacteria that can cause a soft, spongy rot.
To date, SWD maggots have not been found in fruits in Utah. The mystery of where they are feeding remains.
Bacterial canker on sweet cherries enters through wounds, such as winter injury, causing gumming and death of buds, twigs, and large limbs. Spray affected...
Fire blight-affected shoots are easy to spot in fall and winter because the leaves remain attached.
Pear psylla adults are hardly visible to the naked eye. The nymphs (young) feed in a bubble of sap (honeydew), and cause the leaf to die at the feeding area.
This fall, aphids have been flying to their woody hosts to lay eggs in cracks and crevices near buds.
New coryneum infections occur in the fall on leaf scars, so be sure that the spray at 50% leaf drop covers these areas.
