Emerald Ash Borer (EAB)


Get Involved! Join the SLELO PRISM Invasive Species- Volunteer Surveillance Network (VSN) and help us find EAB, or other invasive species. CLICK HERE to join

Are you faced with the task of managing ash trees?  The impacts of EAB will require strategic planning to manage.
The SLELO partnership has created a questionnaire to better understand the needs and potential barriers that stakeholders may encounter while preparing for EAB and managing ash trees,
CLICK HERE to fill out the questionnaire.

If you think you may have an EAB infestation, call the DEC EAB and Firewood hotline: 1-866-640-0652.

Click Here to view a map of EAB infestations in and near SLELO boundaries. Click Here to view zones in St. Lawrence County within five miles of a known EAB infestation.


The emerald ash borer, commonly referred to as EAB (Agrilus planipennis) is an Asian variety of wood-boring beetle that infests and kills species of North American ash (Fraxinus spp.). This pest was first discovered in the U.S. in 2002 in Michigan and has spread rapidly through the U.S. by means of infested firewood.


Emerald ash borer is currently found throughout New York State. It has been confirmed to be within SLELO PRISM  boundaries in St. Lawrence, Oneida, and Oswego Counties. The SLELO partnership is engaged in multiple efforts to raise awareness and help prepare communities for the costs and liabilities associated with EAB infestations.

The larvae of emerald ash borers burrow tunnels and feed on the cambium layer just under the bark of ash trees. This feeding cuts of the nutrient supply to the infested tree eventually leading to tree mortality.  Infested trees become weak and the branches become brittle and fall off causing infested trees to become a costly liability to municipalities and homeowners. EAB is already responsible for the destruction of over 50 million ash trees in the U.S. and New York is faced to lose a large majority of its ash population.  There are insecticide treatment options that can protect ash trees but this option is most feasible for homeowners who have few ash trees on their property or municipalities who want to preserve urban green space. To learn more about treatment options view the resource links at the bottom of this page.


Adults are roughly 3/8 to 5/8 inches long with metallic green wing covers and a coppery red or purple abdomen. They may be present from late May through early September but are most common in June and July.


emerald ash borer (Agrilus planipennis ) on ash (Fraxinus spp. ) - 5473689


larvae are white in color and about 1 inch in size with bell-shaped segmented bodies.


SIGNS OF INFESTATION: include S-shaped larval tunnels under bark,  woodpecker damage, canopy dieback, epicormic sprouts (sprouting from typically the base of the tree), woodpecker damage, bark cracks, yellowing, and browning of leaves, D-shaped exit holes in ash tree bark. There are native borers that cause similar symptoms, to learn more CLICK HERE

emerald ash borer, Agrilus planipennis (Coleoptera: Buprestidae) - 5382310


emerald ash borer (Agrilus planipennis ) on ash (Fraxinus spp. ) - 5471782


EAB infestations weaken ash trees making them a safety liability to people and property. Therefore, ash trees that are located within public areas, roadways, or near power lines or buildings will have to be managed. DEC foresters have knowledge and expertise on how to manage EAB and are available to answer questions.

There are chemical treatment options available to protect ash trees from EAB, but the success of treatments depends on multiple factors such as the time of year, the health and age of the tree, and EAB infestation density.

When chemical treatment isn’t feasible, cutting is the next option. Quarantine laws forbid the movement of infested wood, and infested ash trees are more costly and dangerous to remove. Therefore, the removal of ash trees that will not be protected chemically is best done prior to infestation.

Ash trees that are not located in areas that pose a threat to people or property could serve as good candidates for lingering ash research.

Below are resources to help determine the management strategy. 


Join the SLELO PRISM volunteer EAB Monitoring Network, to join Click Here

Or Contact Megan Pistolese the SLELO Education/Outreach Coordinator at 315-387-3600 x7724.


The St. Lawrence County Emerald Ash Borer Task Force is an excellent resource for EAB preparedness and management guidance.

To learn more, contact John Tenbusch, 315-379-2292, jtenbusch@stlawco.org , OR Paul Hetzler, (315) 379-9192 x 232, ph59@cornell.edu



Recommendations for landowners, municipalities and wood producers 

Community Preparedness Guidance:


General Information:

Photo Credits:

Title photo: Wisconsin’s Emerald Ash Borer Information Source,https://datcpservices.wisconsin.gov/eab/?AspxAutoDetectCookieSupport=1.FirstEAB adult photo: University of Minnesota Extention, http://www.extension.umn.edu/garden/insects/find/emerald-ash-borer/about/Second EAB adult photo: Kenneth R. Law, USDA APHIS PPQ.Larval Tunnels: Leah Bauer, USDA Forest Service Northern Research Station. D-shaped exit hole: Eric R.Day, Virginia Polytechnic Institute, and State University.

Leave a Reply

Your email address will not be published. Required fields are marked *

Copyright © 2018 St. Lawrence Eastern-Lake Ontario Partnership for Regional Invasive Species Management.
All Rights Reserved.