Skip to main content

Emerald ash borer discovered in Brown County

The Minnesota Department of Agriculture (MDA) announced last week that emerald ash borer (EAB) has been confirmed for the first time in Brown County in the city of New Ulm. It was found at a residence after a tree care professional reported suspicious symptoms to MDA. Live larvae were found which were confirmed by the USDA.
Woodpecker pecks is a common symptom
of EAB.  Photo:  Jeff Hahn, U of MN Ext.

Brown County is the 21st county in Minnesota known to be infested with EAB and the third new county in the last two months. This invasive beetle was first found in Minnesota in 2009. 

Since EAB was first found in North America in 2002, it has spread to 35 states and five Canadian provinces. It has killed hundreds of millions of ash trees and has cost hundreds of millions of dollars.

Minnesota has nearly one billion ash trees in the state, one of the largest in the country.  Minnesotans can help prevent the spread of EAB with these three easy steps:
  • 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 and use the “Does My Tree Have Emerald Ash Borer?” guide. Suspect infestations can be reported to MDA’s Arrest the Pest line at 1-888-545-6684 or
There will be open house sponsored by MDA on Tuesday, October 8, 2019 to discuss the discovery of emerald ash borer in Brown County. Residents will be able to see samples and ask experts questions about EAB.

Emerald Ash Borer Open House
Tuesday, October 8, 2019
6 – 8 p.m.
Brown County Law Enforcement Center, Room B11
15 S. Washington St.
New Ulm, MN 56073

The original MDA news release can be found here.

For more information on EAB, see Emerald ash borer in Minnesota.

Author:  Jeffrey Hahn, Extension Entomologist
Print Friendly and PDF