Emerald Ash Borer (Agrilus planipennis Fairmaire)


The emerald ash borer is a destructive beetle from Asia. It was first discovered in Michigan in 2002, but it is thought to have been present since the mid 1990’s when it was introduced in ash wood used as shipping material. EAB was discovered in Randolph, NY in 2009 and has since been found in Alleghany, Chemung, Erie, Genesee, Greene, Livingston, Monroe, Niagara, Ontario, Orange, Orleans, Schuyler, Steuben, Ulster, Wayne, Wyoming, and Yates Counties. It is also present in 18 states and Canada.  EAB will kill all ash trees left untreated. As of May 1, 2013 most of Onondaga County will be under quarantine to slow the spread of Emerald ash borer. That means that there are restrictions placed on the movement of wood products from quarantined areas into non-quarantined areas.  All areas of the state south of the I-90 thruway and east to the state border, except for Rockland, Westchester, Nassau and Suffolk counties and New York City will be quarantined. View the draft map here. See the Press Release from NYS Department of Agriculture and Markets here.


Impacts of EAB Emerald ash borer attacks all species of ash trees. Four species of ash can be found in Onondaga County, white ash (Fraxinus americana), green ash (Fraxinus pennsylvanica), black ash (Fraxinus nigra) and blue ash (Fraxinus quadrangulata). The mountain ash (Sorbus americana) is not a true ash and is not attacked by EAB. Ash makes up roughly 13% of forested trees in the County. New York state has the highest density of ash in the country. Ash is used for baseball bats, tool handles, firewood, and lumber. Black ash is used by Native Americans for basket weaving. Once an ash tree is infested by EAB, a tree may die within 2-4 years. A dead ash tree tends to break off in large pieces, and will be fall soon after it dies. The dead standing ash trees pose a significant hazard, and must be removed as soon as possible. One study predicts the economic impact from management of dead ash trees, treatment to protect trees, and the loss of valuable timber is $3 billion over 10 years Ohio. How to Identify EAB


EAB Look-a-likes There are many insects that look similar to Emerald ash borer.  Check out these photos of EAB look-a-likes to see if the bug you found may be EAB.

If you think you found EAB: Contact us at Cornell Cooperative Extension – 315-424-9485, or Call the DEC EAB hotline at (866) 640-0652 How to Identify Ash trees Ash trees look very similar to a number of other tree species in the region. They are often confused with Hickory species (Carya sp.), Box Elder (Acer negundo), Sumac (Rhus sp.), Walnut (Juglans sp), Tree of Heaven (Ailanthus altissima), and others. Ash trees always have compound leaves with 7-11 leaflets, with opposite branching and stem arrangement, and oar-shaped seeds. The bark looks different depending on the species and age of the tree. Be certain you know what you have before you seek professional tree care assistance. If you need help identifying your tree, please contact us at 315-424-9485.

Management and Control of EAB Insecticide Treatment of Ash Trees in NYS  Information for Woodlot Owners Yard Tree Management Economic  Analysis of Treatment Options Community Preparedness Workbook

Maps of EAB and Quarantines Map of Current New York Quarantined Counties Draft map of updated Quarantine Counties, effective May 1, 2013 US EAB infestations

OtherUseful Links : New York State Invasive Species Clearinghouse New York State Department of Environmental Conservation Quarantine Information Don’t Move Firewood Jessi Lyons, Natural Resources Team Coordinator, Speaks about EAB on WRVO April 4, 2014

EAB is Here. Now What? Fact Sheet

Registered Pesticide Businesses 

Emerald Ash Borer locations updated August 2014

Emerald Ash Borer Locations (Picture Map) updated August 2014

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