Emerald Ash Borer

Maryland Quarantine


The emerald ash borer (EAB) is an exotic pest of ash trees. It is native to Asia and thought to have arrived in the United States in solid wood packing material from its native Asia. It was first detected in the Detroit, Michigan/Windsor, Ontario area in July 2002. Because of EAB, millions of ash trees have died in the central and northeastern United States. USDA estimates that at the national level, if the Emerald Ash Borer went unchecked in the lower 48 states, the undiscounted loss could range from $20 - $60 billion dollars. Many consider it far more serious than gypsy moth, and perhaps equal to the chestnut blight.

The greenhouse and nursery industry is the second largest agricultural sector in Maryland. It accounts for $1.96 billion in gross receipts. (Source: Agriculture in Maryland Summary 2010 - USDA National Agricultural Statistics Service).

Ash trees are one of the most common landscaping trees used in the U.S. and are common in western Maryland forests.

Ash wood is used for all traditional applications of hardwood from flooring and cabinets to baseball bats and tool handles.

Ash is the most common tree in Baltimore - 293,000 trees, 10.4% of trees total population.

Ash accounts for 5,982,000 - 6,591,000 trees in the Baltimore metro area. USDA has estimated losses could exceed $227,568,000 in the Baltimore area alone.

  Galvin citing DNR, MDA, and USDA sources 2003.
  Emerald Ash Borer Federal Quarantine August 2015 
 2015 Emerald Ash Borer Trap Results
                2015 MD PP anf FPM EAB Trap Results.gif2015 EAB Trap Survey
2014 EAB Trap Survey 


Emerald Ash Borer Historical Map; 

Fifteen Mile Buffer from Known Sites