In late August, 2015, starry stonewart was first discovered in Minnesota in Lake Koronis. Of the lake's 3,000 acres, 250 were found to be infested by the invasive, and it was also found in the neighboring Mud Lake.
A preliminary treatment took place on Oct., 7, covering 4 acres near the lake's main public access, plus two small channels. Dan Lais, the DNR's Sauk Rapids-based district manager for ecological and water resources, spoke about early water quality samples. "The results are preliminary. I would categorize that s the plant minimally responded to treatment.
Officials are trying to determine if another treatment before the end of the year would be effective.
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