Emerald Ash Borer

Adult Emerald Ash Borer (Agrilus planipennis Fairmaire)

If you suspect that you have an infested ash tree with symptoms, please call our phone consultants at 1-800-342-2507 (410-342-2507 in Washington, D.C.) for further assistance Monday - Friday, 8AM - 1PM. You can also send your contact information to the Maryland Department of Agriculture via this electronic form any time.

Emerald Ash Borer is an exotic beetle from Asia that attacks ash trees. It has been found in Prince George's county, Maryland. It has killed many millions of ash trees in Michigan, Indiana and Ohio. The Maryland Department of Agriculture needs your help in locating possible infested ash trees and stopping the movement of the emerald ash borer into other areas .

Prince George's county is currently under a quarantine for this pest.

• Firewood and all ash wood products cannot be moved out of the county.
• For detailed information on all quarantine restrictions please visit the Maryland Department of Agriculture's quarantine information page.
  

Symptoms of an ash borer infestation include:

Infested ash trees showing branch dieback and water sprouts.

Cracks in the bark. Galleries may or may not be visible.

Larval galleries under the bark.

D-shaped exit hole is approximately 1/4 inch. Holes from other borers are 3/8 inch or larger and round or oval.

Adult beetle on penny for size comparison.

Various stages of larvae. Mature larvae are approximately 1 1/4 inches.

Excellent Links to Emerald Ash Borer Information

• Main Emerald Ash Borer Information Page - Maryland Department of Agriculture
• Comparison of Emerald Ash Borer with Banded Ash Clearwing - Maryland Department of Agriculture
• MDA Emerald Ash Borer Fact Sheet - Maryland Department of Agriculture
• Emerald Ash Borer - University of Maryland Natural Resources page
• Emerald Ash Borer Pest Alert - USDA Forest Service, Northeastern Area
• CSI for EAB - emerald ash borer site for the Maryland Department of Natural Resources
• Emerald Ash Borer -Plant Protection and Quarantine, APHIS, USDA
• Emerald Ash Borer - USDA, Forest Service Northeastern Area
• www.emeraldashborer.info - excellent multi-state site from Michigan, Indiana and Ohio
• Michigan Emerald Ash Borer site - Michigan Department of Agriculture
• Indiana Emerald Ash Borer site - Purdue University
• Spanish language Emerald Ash Borer site- Purdue University

Image Credits from top to bottom:

David Cappaert, www.forestryimages.org - UGA9000019

David Cappaert, , www.forestryimages.org - UGA1460076

Joseph O'Brien, USDA Forest Service, www.forestryimages.org - UGA1301046

James W. Smith, USDA APHIS PPQ, www.forestryimages.org - UGA1460032

David R. McKay, USDA APHIS PPQ, www.forestryimages.org - UGA1439002

Lexa Panessidi, State of Michigan, www.forestryimages.org - UGA1241011

David Cappaert, www.forestryimages.org - UGA1460072

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