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Flatheaded appletree borer (Chrysobothris femorata) adult beetles are about a half-inch long, brown to gray, and flattened. The body is blunt at the head and tapers to a rounded point at the posterior end. Wing covers appear to be finely corrugated. Borers are about 1 inch long, legless, yellow-white, and slender except for a broad, flat enlargement of the thorax directly behind the head. Borers leave a 3/16 of an inch D-shaped hole when emerging from a tree.

Flatheaded appletree borer larva (Solomon, USDA, Bugwood.org)
Flatheaded appletree borer larva.

(Photo: James Solomon, USDA, Bugwood.org)

Flatheaded appletree borer adult (Bessin, UKY)
Flatheaded appletree borer adult.

(Photo: Ricardo Bessin, University of Kentucky)

     

Management:

  • Reduce stress
  • Sanitation (remove weak and dead wood)

    

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