Fruit

When thrips feed inside the flower, the fruitlet is injured. As it grows, the fruit cracks and oozes gumming.

Fire blight blossom infection wilts the flowers and causes them to turn brown.

Powdery mildew shows up on newer foliage first, and can spread all summer long, depending on humidity.

Sun scald, where the apple is still firm.

A cross-sectional view of a bud and twig affected by bacterial canker.

New coryneum infections occur in the fall on leaf scars, so be sure that the spray at 50% leaf drop covers these areas.

Latex paint or white tree wrap will help to prevent sunscald damage.

Late-season coryneum infection showing depressed, circular lesions with black fruiting bodies.

Brown rot infection showing fast progression of shriveled peach skin and flesh, and white spores.

Severe infestation of woolly apple aphid.

Rolled-up corrugated cardboard tubes, if replaced regularly, can help reduce earwig populations.

Earwigs seeking shelter during the day inside rolled corrugated cardboard.