Hydrilla was first found in an excavated private pond in Marinette County, Wisconsin in 2005, and was verified as monoecious hydrilla in 2007. A team that included federal, state, and local agencies developed a response plan to guide management activities. The plan outlined chemical treatment (August 2007 and June 2008), dewatering the pond to freeze hydrilla tubers and propagules (October 2007), and excavation of the sediment for tubers (November 2007). Intensive monitoring following chemical treatment in 2008, and during 2009 and 2011 indicated no visible signs of hydrilla growth. Periodic monitoring conducted since 2011 has also not detected any signs of hydrilla growth, and this population is believed to have been eradicated at this location.