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Invasive aquatic plants

Starry Stonewort

Starry stonewort fact sheet
Starry stonewort lookalikes

What is starry stonewort?

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. Plant fragments were probably brought into the state on a trailered watercraft from infested waters in another state. In August of 2016, starry stonewort was confirmed in several north-central Minnesota lakes in Beltrami, Itasca and Cass counties. DNR invasive species staff found that a number of other reports of suspected infestations were native species that appear similar to starry stonewort.
 

How to identify starry stonewort?

Starry stonewort is similar in appearance to native grass-like algae such as other stoneworts and musk-grass. Native stoneworts and musk-grass are both commonly found in Minnesota waters. Starry stonewort can be distinguished from other grass-like algae by the presence of star-shaped bulbils. 

If you suspect you have found a new infestation of starry stonewort, or any other invasive species, note the exact location, take a photo or keep the specimen, and 
contact the DNR.
 

Why is starry stonewort a problem?

Starry stonewort can interfere with recreational and other uses of lakes where it can produce dense mats at the water's surface. These mats are similar to, but can be more extensive than, those produced by native vegetation. Dense starry stonewort mats may displace native aquatic plants.

Like all plants, starry stonewort may grow differently in different lakes, depending on many factors. At this time, we cannot predict how it might grow in any one Minnesota lake.
 

How does it spread?

Starry stonewort is believed to be spread from one body of water to another by the unintentional transfer of plant fragments and bulbils, the star-like structures produced by the plant. These fragments, or mud containing them, can be transferred on trailered boats, personal watercraft, docks, boat lifts, anchors or any other water-related equipment that is not properly cleaned.
 

What can people do to prevent its spread?

The most important action you can take to limit the spread of starry stonewort and other non-native aquatic plants is Clean, Drain, and DisposeClean all vegetation, animals, mud and debris from your watercraft and any water-related equipment before you move it from one body of water to another. Drain all water from your watercraft and bait bucket, keep drain plugs out during transport, and Dispose of any unwanted bait in the trash. Clean, Drain, Dispose is required by law in Minnesota.
 

What can be done to reduce starry stonewort?

The potential to manage the plant is not well documented. It appears that treatment with herbicides can suppress starry stonewort. Some states use hand pulling, which may be a way to reduce biomass in small areas. Mechanical removal can also be effective. In the case of a newly discovered population of starry stonewort that has a limited distribution in the lake, mechanical harvesting is not recommended because it might create fragments that would speed the spread of the invasive plant within the lake.

News and Upcoming Events

June Jam

Registration is now open for the 27th Annual June Jam Muskie Tournament.

We are looking forward to hosting another great tournament on seven premier Muskie waters in Polk County: Bone, Cedar, Deer, Round, Wapogasset, and Blake Lakes, and the Apple River Flowage. Wilkins on Bone Lake will be the tournament headquarters. The pre-tournament registration party will be at Wilkins on Friday night, June 16th starting at approximately 5:00 p.m.

 

Check out details for this exciting tournament click here.

2017 June Jam Flyer.pdf
Adobe Acrobat document [281.9 KB]

 High School Muskie Tournament

 

Minnesota’s Muskie Inc Chapters in conjunction with the Hugh Becker Foundation sponsored the 8th annual High School Muskie Tournament June 23, 2017 to be held at Vermilion Dam Lodge on Lake Vermilion. Visit our State High School page.

Contact Us Today!

North Metro Muskies, Inc.

President@nmmuskies.com

CURRENT MOON

Please join us at our general meetings the 3rd Tuesday of each month, Sept. through May. Each month we have a speaker come in and the topics vary from local metro area tactics to the basics of reel cleaning. We also have a rod and reel raffle and lure raffle. You DO NOT need to be a member to attend our general meetings.

When:

3rd Tuesday of the month 7pm – 9pm

Where:

Coon Rapids VFW - 1919 Coon Rapids Blvd NW

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