Where does it grow?

What is the distribution in Washington State?

• Eurasian milfoil has been documented throughout Washington.

• If you think you may have seen this weed, please contact your county weed coordinator or us at noxiousweeds@agr.wa.gov.

How do I control it?

General control methods: Eurasian watermilfoil control can be difficult. Since it spreads by stem fragments, care must be taken to ensure entire plant is removed if mechanical methods or hand pulling is used.

Cultural: Small infestations may be able to be controlled with the use of an opaque fabric that blocks light from the plant. Hand pulling may be employed, but entire plant must be removed or it will resprout.

Herbicide: Because herbicide availability and regulation differ between States, as well as between countries, we recommend the Washington Department of Ecology web site for information on aquatic weed management and herbicides.

Mechanical: Not advised unless area is entirely invaded by plants. Otherwise, mechanical methods may increase infestation.

Biological: Triploid grass carp will eat Eurasian watermilfoil, but it is not very palatable and is not preferred food for the grass carp. Research into other biological methods is being done.

Are there plants that may be confused with Eurasian watermilfoil?

For more information