With Eurasian watermilfoil established in most natural lakes in Indiana, the state DNR has been using early-season herbicide treatments at Stone and Atwood Lakes in LaGrange County for the past two years. With previous coverage at Atwood Lake around 17%, and 28 acres of Stone Lake's 116 infested, Eurasian watermilfoil at both lakes is now hard to find.
"We believe the timing of these treatments is critical to the selective control of Eurasian watermilfoil and possibly the reduction in the population over time," said Rod Edgell, aquatic biologist with the DNR's Lake and River Enhancement Program. "The plant is often present and growing before most native species. So, by treating it early we can control milfoil and give the native plants an advantage throughout the growing season."