Chestnut (Castanea)-European Shothole borer

Anisandrus (Xyleborus) dispar

Pest description and damage Shothole borers are small bark beetles that often attack weakened branches. Anisandrus dispar is the primary shothole borer infesting chestnut in the PNW. When the numerous beetles emerge, the bark takes on a shothole appearance. These beetles are primarily a problem on injured or stressed plants, but healthy trees growing adjacent to blocks of neglected trees are attacked. The adult shothole borer is a brownish-black beetle about 0.08 inch long. The larvae are white, legless, and about 0.16 inch long.

For biology, life history, monitoring and management

See "Bark beetle" in:

Management-chemical control

See Table 4 in: