Eurasian Watermilfoil

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?

Images and Recent news

Eurasian watermilfoil links:

Eurasian watermilfoil fact sheet

invasivespecies.gov-watermilfoil

Eurasian watermilfoil general information

NPS Plant info

USDA Plants Database

Corp of Engineers Eurasian watermilfoil Site