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. 

emerald ash borer detection heat map 2024

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

Map of Towns with Known Emerald Ash Borer Detections

List of Towns with Known Emerald Ash Borer Detections

CAring for Ash Trees/Managing Forests

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