Milfoil in Minnesota Lake: An Update

 A view from White Bear Lake's shore (whitebearlake.org).

A view from White Bear Lake's shore (whitebearlake.org).

     Eurasian watermilfoil was first discovered in White Break Lake in 1988, when a single plant was collected near a public dock, and ever since then mechanical and chemical methods have been used in an attempt to control the invasive. Which went pretty well, until 2010 when lake levels dropped and Eurasian watermilfoil seemed to take over (it was just a good year for the invasive, not a sign of any permanent change, said lake expert Steve McComas). 

     Efforts were increased this year, however, with 85 acres of the lake being treated with herbicides (compared to 35 acres in the previous year). Treatment was found to deliver "mostly good control" with about 3 acres not getting high enough concentrations of the herbicide to knock out the invasive. 

     And other than the milfoil infestation, the lake is in pretty good condition; water clarity allows visibility at depths of 12 to 15 feet, while phosphorus levels stay at a low level of 15 to 18 ppb. The lake also has a strong community of native plants that help keep the milfoil at bay, though locals aren't always fond of the thick native plants that can also impede recreation and navigation.

     For the full article click here or on the link available below.