Emerald Ash Borer

Emerald ash borer

Leah Bauer, USDA Forest Service Northern Research Station, Bugwood.org

Emerald Ash Borer (EAB) is a beetle native to northeastern Asia that feeds on ash trees. Infested trees die within three to five years. As a non-native insect, EAB lacks predators to keep it in check. It was found in Concord in March 2013, and the list of towns with known infestations continues to grow. 

Movement of ash wood and ash wood products is no longer regulated within New Hampshire. However, moving ash risks spreading emerald ash borer. We encourage professionals and landowners to follow best management practices when moving ash. 

PLEASE NOTE: The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) recently published a final rule that removes the federal domestic emerald ash borer (EAB) quarantine regulations. The final rule is effective January 14, 2021. States may enact quarantines to prevent the introduction of emerald ash borer. Regulatory requirements will vary by state. Entities that export ash wood and ash wood products should check with their local state Department of Agriculture for assistance with requirements. In NH, contact (603) 271-3681.

You can help protect New Hampshire's forests by reporting suspect trees or insects; considering insecticide treatment of some trees to keep ash in the understory; being aware of the risks of spreading EAB; and using best management practices to avoid transporting this pest to your favorite outdoor spot.

Emerald Ash Borer Preparation Checklist for NH Towns and Cities

Licensed Pesticide Applicators for Emerald Ash Borer

It takes years to decades for EAB to spread naturally; humans can spread it in hours.

EAB map

Map Keys
Generally infested area
Emerald ash borer is in this zone, though not necessarily in all ash trees.


Potential expansion area 
Emerald ash borer isn't known to be in the area, but the area is within 10 miles of the outer limits of the known infestation. There is a high probability emerald ash borer will spread naturally to this zone within a few years.


Alert area
Emerald ash borer isn't known to be in the area and it is more than 10 miles from the known infestation.