Emerald Ash Borer

City of Inver Grove Heights impact

The Minnesota Department of Agriculture (MDA) confirmed an EAB infestation in the northwest corner of the City of Inver Grove Heights. The City is investigating the EAB infestation and encourages residents to look for signs of EAB. This is the perfect time to look for woodpecker damage and other signs of emerald ash borer because the trees are still bare. There are several things residents should look for when checking for emerald ash borer: 

  • Be sure you’ve identified an ash tree. This is an important first step since EAB only feeds on ash trees. Ash have opposite branching – meaning branches come off the trunk directly across from each other. On older trees, the bark is in a tight, diamond-shaped pattern. Younger trees have a relatively smooth bark. 
  • Look for woodpecker damage. Woodpeckers like EAB larvae and woodpecker holes may indicate the presence of EAB. 
  • Check for bark cracks. EAB larvae tunneling under the bark can cause the bark to split open, revealing the larval (S-shaped) tunnels underneath. 
  • Contact a professional. If you feel your ash tree may be infested with EAB, contact a tree care professional, your city forester or the MDA at arrest.the.pest@state.mn.us or 888-545-6684 (voicemail).

How to help

The biggest risk of spreading EAB comes from people unknowingly moving firewood or other ash products harboring larvae. There are three easy steps residents can take to keep EAB from spreading: 

  • Don’t transport firewood. Buy firewood locally from approved vendors, and burn it where you buy it. 
  • Be aware of the quarantine restrictions. If you live in a quarantined county, be aware of the restrictions on movement of products such as ash trees, wood chips and firewood; and, 
  • Watch your ash trees for infestation. If you think your ash tree is infested, go to www.mda.state.mn.us/eab and use the guide “Does my tree have emerald ash borer?”

About EAB

The emerald ash borer (EAB), ia an iridescent green beetle with a red or purple abdomen. The EAB measures about 1/2-inch-long and feeds off the foliage of ash trees. The larva is a cream colored, legless grub that lives just beneath the bark of the tree. Larvae create tunnels under the bark that interfere with water and nutrient transport. The EAB feeds on and kills ash trees.


In 2002 EAB attacked and killed millions of trees in the Great Lakes region of Detroit, Michigan, and Windsor, Ontario. Minnesota is highly susceptible to the destruction caused by this invasive insect. The state has approximately one billion ash trees, the most of any state in the nation.


For more information:

Certified Arborists

Additional Information