Eurasian Watermilfoil (Milfoil)

Scientific name: Myriophyllum spicatum L.

Eurasian watermilfoil was first discovered at Newman Lake in September of 2002 in a small area at the southeast end of Newman Lake near the outlet gate. Eurasian watermilfoil is a non-native highly invasive aquatic weed listed on the state noxious weed list. Beginning in 2003 the Newman Lake Flood Control Zone District (NLFCZD) began implementing control efforts with the assistance of an Early Infestation Grant from Washington State Department of Ecology. A comphrehensive management plan was finalized in October of 2005. To view or download a sections or the complete plan in
Adobe PDF format, please access:

General and Technical Milfoil Information

Websites with extensive information on this invasive aquatic vegetation are listed below.

United States Department of Agriculture (USDA) - Aquatic Species

WA State Department of Ecology - Milfoil Technical Information

WA State Department of Ecology - General Milfoil Information

Milfoil Images

2007 Herbicide Treatment

On August 8, 2007, Newman Lake was treated for Eurasian watermilfoil. Public notices and letters were sent to Newman Lake area businesses and residences within a quarter mile radius of the upcoming herbicide treatment areas. Approximately 22 acres were treated with 2,4-D Amine(liquid) and 7 acres with 2,4-D Ester(granular). To view or print the notice and map, please access the following links.

Liquid Herbicide Treatment Notice

Newman Lake Milfoil Liquid Treatment Plan Letter

Granular Herbicide Treatment Notice

Newman Lake Milfoil Granular Treatment Plan Letter