Eurasian Watermilfoil Myriophyllum spicatum
Where did Eurasian watermilfoil come from?
- Native to Europe, Asian, and northern Africa, Eurasian watermilfoil invaded North America in the 1940s.
- Eurasian watermilfoil has been reported in 33 states including Kansas.
- Eurasian watermilfoil has been discovered in Cedar Bluff Reservoir, Yates Center Reservoir, Lebo City Lake, Scott SFL, Antelope Lake, Clark SFL, Ottawa SFL, Washington SFL, Mined Lands #1, 7, 12, 27, Sheridan SFL, Cowley SFL, Lonestar Lake, Edgerton-Bridgewater Lake, Lake Shawnee, Topeka-Governor's Ponds, and Buffalo Park Pond in Wichita.
What does Eurasian watermilfoil look like?
- Stems branch near water surface.
- Eurasian watermilfoil has small reddish flowers above the water surface during mid-summer.
- 3-5 feathery leaves arranged in whorls (circles) on stems.
- Each leaf has 12-21 leaflet pairs (native watermilfoil has 5-10 leaflet pairs)
- Found in waters less than 20 feet deep generally in dense mats
Why is Eurasian watermilfoil a problem?
- Eurasian watermilfoil forms dense mats on the water's surface.
- The dense canopy can out-compete and eliminate native aquatic vegetation.
- The dense canopy hinders recreational activites.
How is Eurasian watermilfoil spread?
- Milfoil spreads when plant pieces break off and float on water currents.
- It can cross land to new waters by clinging to boats, trailers, and fishing gear.
- Remove all vegetation from boats, trailers, and all recreational equipment before leaving a lake.
How do we control Eurasian watermilfoil?
- It is nearly impossible to eradicate an established infestation but chemical treatment shows promise.
- Early detection of isolated populations may help prevent their spread. Your help to report new sightings and to prevent their spread is vital.
What do I do if I find Eurasian watermilfoil?
- If you discover Eurasian watermilfoil note the date and location, and contact your local Kansas Department of Agriculture office, the Emporia Research Office at (620) 342-0658, or email the Aquatic Nuisance Species Coordinator.
Eurasian watermilfoil links: