Plum, Prune (Fresh): Peachtree borer

categories: Plum, Prune (fresh) Plum, Prune (Fresh) Insects Tree Fruits

revision date: 2022-12-05 12:00

Peachtree borer and damage at base of tree.
Peachtree borer and damage at base of tree
Photo by: K. Grey

Biology

The peachtree borer adult is a dark, bluish, clear-winged moth which somewhat resembles a wasp or hornet. The female, which has dark forewings and a red-orange band on the abdomen, lays eggs on the tree. Emerging larvae move to ground level or just below ground, where they burrow beneath the bark and feed in the crown region. Signs of larval feeding include the presence near ground level of jelly-like gum mixed with dirt and pellets of excrement. Heavy infestations can weaken older trees, and foliage may be yellowed as if nitrogen-deficient. Young trees may be girdled and killed.

Management Options

Use Integrated Pest Management (IPM) for successful plant problem management.

Non-chemical Management

Select non-chemical management options as your first choice!

  • Probe into tunnels with a sharp wire to kill larvae.
  • Pick out larvae with a sharp instrument. This can damage trees if not done carefully.

Chemical Management

IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.

  • Apply in late spring or when adults are active.
  • Adult flight is usually from late June through September.
  • Apply product to trunk at base above soil line.

Approved Pesticides

Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.

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