Problems coming for Ash Trees

Sunday, January 10, 2016 - 4:15pm

Emerald Ash Borer in Montgomery Parks

Where did Emerald Ash Borer come from?

Emerald Ash Borer (EAB) is a non-native invasive beetle from Asia that was first detected in the US in 2002 on ash trees in Detroit, Michigan

Are all ash trees in Maryland affected by the borer?

Yes, green, white and black ash are all affected.

How does Emerald Ash Borer spread?

EAB is spread by moving infested wood, untreated ash products and nursery stock. EAB has been found throughout the state of Maryland so there is no limit on moving ash wood, products or nursery stock throughout the state. There is a quarantine on moving any of these products out of the state. Once established, EAB can fly up to 15 miles to infest new trees.

Is ash an important canopy tree in Montgomery County?

Yes, ash is one of the predominant canopy trees in many of Montgomery Parks’ Stream Valleys including Rock Creek, Muddy Branch, Watts Branch and Seneca Creek. It is also a planted, landscape shade tree in parks.

How does the borer affect the tree?

EAB larvae feeds on the inner bark of the ash tree disrupting the tree’s ability to transport water and nutrients needed to survive. This causes branches and the entire tree to die. 

For more on this infestation, look at the attachment provided by Montgomery Parks.