Effects on Ash Trees

The Emerald Ash Borer (EAB) attacks and kills all species of ash trees, including white, green, black and blue ash trees. Larvae cause massive damage as they feed on the conductive tissue of tree, blocking nutrients and water from traveling between the tree’s roots and leaves.

Once infested, a tree will likely die within five years. The decline of the tree occurs over several years. Symptoms of infestation include:

  • D-shaped hole on bark
  • S-shaped tunnels beneath bark
  • Split bark or bark chipped off by a woodpecker
  • New growth on the trunk
  • Thinning of the tree’s crown