Other Pests You May See—Fruit Development

Each name links to more information on identification and management.

Click on photos to enlarge
Armillaria root rot.
Armillaria root rot
Identification tip: Leaves often turn pale and wilt, usually on one side of the tree. White fungus can be seen if the bark is peeled from the trunk where it meets the soil.
Bacterial canker.
Bacterial canker
Identification tip: A dead branch can signify bacterial canker. Look for substantial gumming on the bark surface.
Phytophthora root and crown rot.
Phytopthora root and crown rot
Identification tip: Sparse, pale foliage can indicate Phytophthora. Cankers can be found in the bark at the crown area.
Peach silver mite.
Peach silver mite
Identification tip: Foliage with a silvery appearance and leaf edges that are curled towards the midrib may indicate peach silver mite infestations.
No photo available.
Black peach aphid
Identification tip: Black peach aphids are shiny black, while the nymphs are reddish brown.
Identification tip: Scab infections on fruit first appear as dark lesions on ripening fruit.

Verticillium wilt
Verticillium wilt
Identification tip: Verticillium wilt becomes apparent when leaves on one or more branches, often on only one side of the tree, turn yellow and/or wilt early in the growing season.

Tree borers
American plum borer.
American plum borer or prune limb borer
Identification tip: Extensive gumming around scaffold crotches, at pruning wounds, or in crown galls can indicate the presence of either one of these borers.
Shothole borer.
Shothole borer
Identification tip:Tiny, circular holes about 1/16 inch in diameter are created when adults emerge from the tree.
Pacific flatheaded borer.
Pacific flatheaded borer
Identification tip: Rough, broken bark on a young tree can signify that a larva is feeding under the bark.
Peachtree borer.
Peachtree borer
Identification tip: Gumming at base of the tree, as well as frass (excrement) and pupal cases, may indicate a peachtree borer infestation.

Statewide IPM Program, Agriculture and Natural Resources, University of California
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