2017 General Aquatic Nuisance Plant Treatment Maps

As has been the case for over 20 years, an aquatic herbicide application is being conducted on June 20th to control excess aquatic vegetation. Unlike past seasons, the Main Lakes Chain of Lakes will not be treated with contact herbicides. The Main Lakes Chain was treated with Fluridone (trade name Sonar) back on May 15th. Unlike contact aquatic herbicides, Fluridone is systemic and is intended to kill Eurasian milfoil. A second difference is that contact herbicides are only applied to shoreline areas of the lake where aquatic vegetation is disrupting recreational pursuits or degrading property values. Fluridone is administered evenly throughout the chain of lakes and maintained at a target concentration (6 parts per billion) for multiple months. The contact herbicides being applied June 20th are much quicker acting, taking about 10 days to knock plants down. These treatments have a 24 hour swimming restriction. Refer to posted treatment signs for more information. Please don't hesitate with any questions.