Aquatic Plant Research > Invasives > Management and Control > Eurasian Watermilfoil (EWM) Control > Small Scale > Mechanical Control > Final Report of Early Season 2,4-D Herbicide and Deep Harvesting Treatment Effects on EWM
Aquatic Plant Research
Final Report of Early Season 2,4-D Herbicide and Deep Harvesting Treatment Effects on EWM
Dane County residents and lake managers were interested in early season management options for control of Eurasian watermilfoil. DNR Science Services partnered with Dane County Lakes and Watershed Commission and the US Army Corps of Engineers to compare the use of early season 2,4-D herbicide treatments and early season deep mechanical harvesting on Eurasian watermilfoil and native plants. Five-acre replicated experimental and reference plots were established in Turville Bay and tracked over several years. Both methods were useful to seasonally reduce Eurasian watermilfoil, but also reduced coontail, a common native plant. Management did not adversely affect other less frequently occurring native species. Both methods required continued use to maintain control. The results of this study provide additional information managers can use to guide aquatic plant management decisions.