Bronze birch borer
Agrilus anxius
- D-shaped exit holes can eventually be observed on the trunk
and branches - S-shaped galleries can be seen under the bark
- Foliage at top of the canopy first becomes sparse
- Eventually twigs and then branches dieback starting at the
top of the canopy and progressively working its way down - Raised lumps or ridges can be seen on the trunk and branches
- Preferred hosts are European white birch and whitebarked Himalayan birch; paper birch, gray birch are also attacked; river birch is rarely infested
- More information on Bronze birch borer...
