By Ken Schwebke
In late August and early September surveys were done to see the results of our EWM Herbicide treatment from spring 2021.
We were disappointed to find out both from the Onterra and DNRs fall surveys that the 2021 treatment was not as successful as we expected. We met Brenda Nordin at the DNR and we are thinking this could be attributed to a couple issues.
While the herbicide concentration was sufficient to eliminate the Milfoil in the treatment area, the chemical that was used may not have been the correct herbicide to use. The Milfoil may have developed a resistance to it. Another issue could have been that the Milfoil may have been blown back in the bays that were treated over the course of the summer.
Samples of the Milfoil were extracted and sent to the DNR lab to get more details of the make up so for next year we can dial in the right Herbicide and saturation levels.
We will be meeting our consultant Onterra within the next week to discuss their thoughts on our spring 2022 treatment plan.