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Plum

Other Pests You May See–Dormant Season

Names link to more information on identification and management.

Click on photos to enlarge
American plum borer.
American plum borer
Identification tip: Extensive gumming around scaffold crotches, at pruning wounds, or in crown galls can indicate the presence of American plum borer.
Pile of frass at entrance of peach twig borer hibernaculum.
Peach twig borer hibernacula
Identification tip: Hibernacula are most commonly found in the crotches of 2- or 3-year-old wood. Look for tiny piles of reddish frass.
Italian pear scale.
Italian pear scale
Identification tip: Look under moss or lichens for the light-gray covering of this scale. Under the cover, the scale's body is reddish.

Unhatched eggs of fruittree leafroller
Fruit tree leafroller eggs
Identification tip: Overlapping eggs are laid in masses on limbs and twigs; initially they are covered with a gray secretion that turns white upon aging.

The crown and lower trunk of this tree have been girdled by voles, Microtus sp.
Pocket gophers
Identification tip: Pocket gopher mounds are generally fan-shaped and have a plugged opening.
Voles.
Voles
Identification tip: Voles chew the bark off trees, just above and below the soil line.

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