After fruit softens, twig borer larvae will enter the fruit to feed.
Fruit
Codling moth larvae often enter young fruitlets at the calyx end.
Clear snow off trees to prevent limb breakage.
Snow on fruit does not harm the fruit or the tree, unless temperatures fall below 28F. Image courtesy of front range food gardener. blogspot. com
Blister mites feed inside raised bumps on foliage. They do not harm the vigor of the plant. Appleleaf blister mites (left) start out green and turn brown in...
Treatment for western cherry fruit fly should start when the fruits in the sunniest locations turn a salmon-blush color on the yellow. The fruit in the middle...
Monitor tart cherry leaves in the lowest part of the tree for powdery mildew.
This fire blight infection was caught 2 weeks after bloom. In this case, remove twice the length of the visible infection.
This fire blight infection is about 3 to 4 weeks old. The bacteria has already entered the branch, so it should be pruned 12 inches below the visible canker.
Pearleaf blister mites cause raised bumps. They start out green, and then turn dark brown.
Appleleaf blister mites start out green and later in the season, turn brown in color. They do not harm the plant.
Apple scab forms blotchy lesions on foliage and fruit. It is more of a problem on backyard trees.
Early coryneum infections on fruit appear as purplish spots.