Greater Lake Sylvia Association

Working to maintain and improve Lake Sylvia

Eurasian Watermilfoil (EWM)

In 2008 GLSA was notified by the DNR that Eurasian Watermilfoil has been discovered in various sites on West Lake Sylvia.
It is the goal of GLSA to prevent the spread and reduce infestations of EWM. It is the policy of GLSA to pay for chemical treatment.
Eurasian milfoil has slender stems encircled by feathery leaves in groups. It can be difficult to identify for the casual observer because you are typically looking down at the plant in the water, and if you break off a stem to get a better look it appears quite different from it's appearance in the water. The right-most plant in the photograph at the right shows what it looks like when removed from the water.
Northern milfoil, which is a native, non-invasive plant, closely resembles Eurasian milfoil, and can also be found in Lake Sylvia. It can be distinguished by the number of leaf divisions; Eurasian milfoil has 9-21 pairs of leaflets per leaf, while Northern milfoil typically has 7-11 pairs of leaflets. Another technique for telling the two apart is that the feathery leaves of Eurasian milfoil collapse when removed from the water, while Northern Milfoil leaves remain firm. The photograph on the right illustrates this difference.
CurlyLeaf Pondweed Treatment and Monitoring - Contact Kent Davidson robinkentd@gmail.com (320) 274-6448
We treat CLP with herbicide in areas where it tends to concentrate.
In 2016 we did a complete survey of both East and West Lake Sylvia. This survey will be used as a baseline for planning and evaluating future EWM treatments. An interactive map showing the CLP survey is also available. This Google Map allows you to zoom in on any of the areas for more detail and provides the GPS coordinates of all CLP that was detected.


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