To Protect and Improve the Quality of Lake Sylvia

Greater Lake Sylvia Association


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Starry Stonewort Treatment is Complete

The GLSA responded quickly to the discovery of Starry Stonewort, developing and implementing a treatment plan that that combines the latest research and techniques available.

  • Conducted a full survey of East and West Lakes (none found elsewhere)
  • Installed barriers to contain the infestation at the landing
  • Conducted pre and post-treatment surveys of the treatment area
  • Arranged for Lake Sylvia to be part of an ongoing research study through University of Minnesota Aquatic Invasive Species Research Center for treatment of Starry Stonewort
  • Used Diver Assisted Suction Harvesting to remove the Starry Stonewort - the first time ever in Minnesota
  • Treated with an algaecide (Copper Sulfate crystals) with a second treatment 14 days later
We will review the results of our treatments and formulate a plan for follow up surveys and treatments in the Spring.

The GLSA thanks our volunteers on the Board and AIS committee for the efforts in coordinating this response. We also thank our partners for their financial support and scientific expertise.
  • Wright County Soil and Water
  • Department of Natural Resources (DNR)
  • Minnesota Aquatic Invasive Species Research Center (MAISRC)
  • Waterfront Restoration
  • PLM Lake & Land Management

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Starry Stonewort found on Lake Sylvia in Wright County

On Thursday September 29th Chris Jurek, DNR  aquatic invasive species specialist reported to the GLSA that Starry Stonewort was found on West Lake Sylvia at the public access. The access has been posted to notify boaters of this new infestation.

Starry stonewort are grass-like algae that are not native to North America. The plant was first confirmed in Minnesota in Lake Koronis, near Paynesville in Stearns County, in late August of 2015. Since that time, the DNR has reported infestations at Lake Winnibigoshish, Moose Lake , Rice Lake , Upper Red Lake and Cass Lake.

The GLSA Board is meeting with the DNR on Monday to discuss treatment options.

As new information is available we will post it on our website.

You can read more about Starry Stonewort, its impact and how to identify it in the latest Loon Calls and on the Lake Sylvia AIS page.

The map below shows the location of the plants (red dots) and the other surveyed locations (yellow).

Zebra Mussel Found in Lake Sylvia (Updated 6/28/16)

A crew from Anchor Dock and Lift  discovered a Zebra Mussel in about 15ft of water at the southernmost part of the East Lake and attached to weeds. We conducted  subsequent searches with the DNR, Blue Water Science and  volunteers. We found a single ZM in a second location also on the East Lake. Based on these findings, the DNR has classified Lake Sylvia as infested with Zebra Mussels and has posted a warning sign at the public access.

Steve McComas of Blue Water Science has prepared a report for the GLSA Board of the search efforts and our options for treatment. After consulting with Steve and Chris Jurek (Aquatic Invasive Species Specialist ) of the DNR the GLSA board has concluded that there is no viable treatment option for our infestation that would allow us to eradicate Zebra Mussels in Lake Sylvia.

Zebra Mussel Found at Site 5


Zebra Mussel Found at Site 3 (Original)

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