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Lake Name:

a lake.

Contact information
For information on Lakes in Wisconsin, contact:
Wisconsin DNR Lakes
Division of Water
Bureau of Water Quality
Aquatic Plant Monitoring Contacts
Aquatic Plant Research > Invasives > Management and Control > Eurasian Watermilfoil (EWM) Control > Large Scale Management > EWM Fluridone > Effects of Whole-lake Herbicide Treatment of EWM

Aquatic Plant Research Effects of Whole-lake Herbicide Treatment of EWM

Wisconsin lake managers requested DNR Science Services investigate the target and non-target effects of whole-lake fluridone treatments for Eurasian watermilfoil. Researchers analyzed and summarized results from four treated lakes in Wisconsin, and found that fluridone can be very effective at controlling Eurasian watermilfoil over the short-term (1-4 years). However, the treatments also reduced several native plant species for a similar time period. Water clarity reductions also occurred in 3 of the 4 lakes studied. This work demonstrated both positive and negative outcomes from whole-lake usage of fluridone and helped managers evaluate the pros and cons of a whole-lake manipulation to control Eurasian watermilfoil. The journal article describing these findings won the Best Paper of the Year Award for Lake and Reservoir Management in 2007.


  • Mary Gansberg
  • Jennifer Hauxwell
  • Scott Provost
  • Pamela Toshner
  • Scott Toshner