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Peach

Tree Shoot Damage

The following photos and identification tips will help you identify shoot damage caused by peach twig borers, Oriental fruit moth larvae, calocoris plant bugs, and western flower thrips. Names link to more information on identification and management.

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Peach twig borer.
Peach twig borer
Identification tip: Shoot strikes caused by peach twig borer generally first appear early in the season before leaves have reached two inches long. There is no frass on outside of the entry hole, even when strike is fresh. To find the larva and positively identify the damage, pull the shoot apart.
Oriental fruit moth
Oriental fruit moth
Identification tip: Shoot strikes caused by Oriental fruit moth first appear a little after those of peach twig borer when the leaves are about 5 to 8 inches long. Entry holes for fresh strikes may have excrement (frass) on the outside of the hole. To find the larva and positively identify the damage, pull the shoot apart.
Calocoris and thrips.
Plant bugs and thrips
Identification tip: Damage caused by plant bugs (Calocoris, Lygus) is very similar to that caused by thrips. Feeding generally occurs early in the season on developing shoot tips low in the tree. There is no tunneling in these shoot tips, just the wilting of a leaves at the shoot terminal. Affected growing tips may eventually die, causing lateral buds to push and shoots to become bushy.

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