Cherry: Peachtree borer
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 on the trunk 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
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Pick out larvae with a sharp instrument. This can damage trees if not done carefully.
- Probe into tunnels with a sharp wire to kill larvae.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Apply generally 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. Esfenvalerate is toxic to bees.
- Do not apply products containing esfenvalerate on or near blooming plants.
- To minimize risk to bees, apply in the evening after bees have stopped foraging for the day.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
Additional Image
Photo by: R. Van Denburgh
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.