Michigan DNR: As Invasive European Frog-Bit Spreads, Boaters Reminded To 'Clean, Drain And Dry'

Press release from Michigan DNR:

August 19, 2021

Contact: Tom Alwin, 517-342-4069 Media contact: EGLE Media Office, EGLE-Assist@Michigan.gov or 517-284-9278 Agency: Natural Resources

Aug. 19, 2021

European frog-bit, an invasive aquatic plant, has been found in the lower Lincoln River in Mason County. The Michigan Department of Environment, Great Lakes, and Energy also has confirmed the presence of European frog-bit in several other locations across the state.

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The problem

European frog-bit can form dense mats on the surface of slow-moving waters like bayous, backwaters and wetlands. These mats can impede boat traffic and movement of large fish and diving ducks.

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What we're doing

Michigan's Invasive Species Program staff and partners plan and undertake survey and response efforts. Michigan's Invasive Species Program is cooperatively implemented by the DNR, EGLE and the Department of Agriculture and Rural Development.

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How you can help

If you think you have seen European frog-bit outside of these known locations, please email EGLE-WRD-AIP@Michigan.gov and provide the location and a photograph.

Additionally, boaters, anglers, and waterfowl hunters are being asked to Clean, Drain and Dry any boats, trailers and other gear prior to use in another body of water to help prevent the spread of European frog-bit and other aquatic invasive species.

• Clean: Inspect boats, trailers, docks and gear and remove all mud, debris and plant material. Use a hose or power washer when available. Dispose of unwanted material in a trash can.
• Drain: Remove water from live wells, bait buckets, bilges and other compartments before leaving an access site.
• Dry: Allow boats and gear to dry for at least five days, if possible, before use in other bodies of water.

For more information about European frog-bit and other invasive species, visit Michigan.gov/Invasives.

Michigan's Invasive Species Program is cooperatively implemented by the Department of Environment, Great Lakes, and Energy, the Department of Natural Resources, and the Department of Agriculture and Rural Development.

Note to editors: The accompanying photos are available for download. Caption information follows.

Illustration: European frog-bit is a free-floating aquatic plant with small (0.5- to 2.5-inch) leaves. Illustration courtesy of Bruce Kerr.

Turions: Tiny, seed-like structures called turions can attach to boats and gear and spread European frog-bit to new locations.

Alwin: EGLE aquatic biologist Tom Alwin removes European frog-bit from a backwater area in Pentwater River State Game Area.

This press release was produced by the Michigan DNR. The views expressed here are the author’s own.