Identifying Emerald Ash Borer Infestation

What happens here

The host points out the characteristic D-shaped exit holes and S-shaped galleries under the bark, confirming an emerald ash borer (EAB) infestation. These signs indicate that the ash tree is dying or dead, justifying its removal to prevent further spread of the invasive pest and mitigate safety hazards from weakened trees.

Goal: Confirm emerald ash borer infestation as the reason for tree removal.