Emerald Ash Borer

What is Emerald Ash Borer?

The Emerald Ash Borer (EAB) is a small, green boring insect that attacks and kills all trees in the Ash family (Fraxinus spp). This invasive insect has been spreading across the State of Wisconsin for the last ten years and has now been detected in and around River Falls. River Falls has an estimated 2,000 public Ash trees.

Emerald Ash Borer

What does this mean for the City?

This insect is currently having an impact on our urban forest and will continue to do so as long as there are Ash trees present. The City anticipates EAB to spread to its peak in 3-5 years. A combination of chemical treatment, pre-emptive removals, and infested tree removals as EAB spreads will make the peak of  Ash tree removals more manageable. River Falls initiated its action plan and has begun to remove selected Ash trees before they become infested.

 What does this mean for residents?

There are a few options you can take to help fight the spread of EAB. If you have or think you have an Ash tree or an infected Ash tree on your property and want to know your options, please contact the City Forester, Mike Noreen at 715-426-3467 or by email.

Visit the links below or the Urban Forestry FAQ page here for more information.

Do you have an Ash tree in your boulevard?

In a matter of time, the EAB will infect and kill the City’s Ash trees, including those in the boulevard around your house. To help fight the spread of EAB, please see your options, as a resident, below:

1. Get ahead of the curve: remove and replace* 

Ask the City to remove your boulevard ash tree as soon as possible and replace it with another species at NO cost to you.

2. Try to save your Ash tree: treat*

Chemically treat your boulevard ash – by a professional or DIY - for about $ 200 every other year.

3. Not sure? wait

In the next 5-7 years, the City will remove the Ash tree and replace it with another species at NO cost to you.

* Please contact the City Forester, Mike Noreen at 715-426-3467 or by email so we can best serve you.

Emerald Ash Information