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Emerald Ash Borer

Emerald Ash BorerThe Emerald Ash Borer (Agrilus planipennis) is a wood boring beetle that attacks Ash trees.  Adult borers are ¼ inch to ½ inch in length and metallic green in color.  First discovered in Michigan in 2002, EAB is responsible for tens of millions of Ash tree deaths in several states.  The EAB was first discovered in Kane County IL in 2006 and has since been rapidly infesting and destroying Ash trees throughout Illinois.  To view a list of confirmed EAB cases in Illinois towns click here.

Damage is caused to trees primarily from the Emerald Ash Borer larvae.  These larvae feed on the inner bark of a tree, creating S galleries that prevent water and nutrients from moving through the tree tissue.  Over time, the tree cannot get nutrients and will die.  Generally speaking, high populations of EAB can kill a small tree within 1-2 years of becoming infested and large trees in 3-4 years.  Once a tree is heavily infested with EAB, removal is the only option. 

Emerald Ash Borer:      Emerald Ash Borer Treatment

  • needs to be treated PROACTIVELY;
  • will attack all Ash trees that are not protected;
  • is very difficult to identify in the early stages of investation.  

Signs and Symptoms:

  • Canopy dieback, usually starting at the top & vertical bark splitting
  • Excessive amounts of green shoots (suckering) may appear in the lower trunk
  • “D”-shaped exit holes in the bark, roughly 1/8 inch in diameter.
  • Increased woodpecker activity.


Canopy Dieback from Emerald Ash Borer

Canopy Dieback

Suckering on Emerald Ash Borer Infested Tree


D-Shaped Exit holes, Emerald Ash Borer

D-Shaped Holes

S Galleries from Emerald Ash Borer


Treatment Options

 Depending on the size and health of the health of your trees, we can recommend a treatment program.  All trees will be thoroughly inspected to determine health and response to treatments.  After inspection, it can be determined if your tree would respond to treatment.  We can suggest annual or biannual treatments depending on your unique situation.  We only use scientifically formulated and research-backed products to provide you with the best results. 

Call us today to start protecting your Ash tree before it falls victim to the Emerald Ash Borer!