Emerald Ash Borer


Originating in Asia, the Emerald Ash Borer (EAB) is a wood-boring beetle that infests and kills Ash Trees. The beetle was first discovered in North America in 2002, appearing in southeastern Michigan. Since that time the Beetle has spread to areas throughout the country including Indiana, Ohio, Illinois, Pennsylvania, West Virginia and Maryland.

The EAB is most destructive when it is in its larval stage. EAB eggs are laid on the bark of the Ash Tree. Once hatched, the tiny larvae begin boring through the bark into the cambium (the area between the bark and wood of the tree). This disrupts vital water and nutrient passageways critically damaging the tree.

Additional Information

For EAB information for Spanish speaking individuals please visit the Purdue University Extension office's EAB page:

En Espanol

Other useful documents and websites:

Emerald Ash Borer on a penny on a tree limb
Emerald Ash Borer