How to Manage Pests

Pests in Gardens and Landscapes

Seasonal development and life cycle—Peach twig borer

In the fall, winter, and very early spring, peach twig borers overwinter in limb crotches in cells called hibernacula covered with chimneylike piles of frass and sawdust. Larvae emerge in early spring and migrate up twigs and branches, where they attack newly emerged leaves and shoots. Pupation takes place in protected places on trees and occasionally in the stem cavity of infested fruit. Adults lay tiny eggs individually on twigs and fruit in the spring and summer and on young branches in the fall. Eggs are also laid on the undersides of leaves next to veins or the midrib.

Egg
Egg
Larva
Larva
Adult
Adult
Hibernacula
Hibernacula

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