How does EAB affect trees?
A. In its larva form (like a caterpillar), emerald ash borer feeds in an S-shaped pattern just under the bark of ash trees. This feeding disrupts the tree’s transportation of water and nutrients. Once larvae finish feeding under the bark, they mature into adult beetles that chew their way out of the tree through D-shaped exit holes. Infested ash trees in North America generally die after two to three years, but heavily infested trees have been observed to die after one year of beetle attack.
