Watermilfoil (Myriophyllum) is an aquatic plant, different species of which can be found throughout the world. The most common ones in the U.S. are the native Northern Milfoil and the highly invasive Eurasian Milfoil (Eurasian Milfoil has 12-21 pairs of leaflets per leaf and Northern Milfoil only has 7-11). This page focuses on Eurasian milfoil, which can take over large areas and can form large floating mats of vegetation on the surface. Typical habitat includes fresh to brackish water of ponds, lakes, slow-moving streams, reservoirs, estuaries and canals. It is tolerant of many water pollutants. Because of poor seed germination, it reproduces by fragmentation. It produces fragments during the summer after fruiting once or twice then the shoots get carried away by currents or boaters and they form new plants.
Because of its ability to spread rapidly and the density of a milfoil infestation, it often blocks out sunlight for plants native to the lakes. The plant can also inhibit the movement of larger fish, therefore disrupting the predator-prey relationship. Many waterways become congested, and the plant can cause serious damage to outboard motors and fishing gear due to these dense groups as well. Some lakes have even been rendered unsuitable for marine activities due to milfoil infestation!
- Reddish-brown plant stem that thickens below the water and curves to lie parallel with the water surface.
- Submersed feathery leaves. Arranged in whorls of 3-6 leaves about the stem.
- Tiny yellow or reddish 4 part flowers stick out 2 -4 inches above the water.
- The fruit is contained in a hard capsule with 4 seeds in it.
- Can be confused with other plants including other milfoils.
C-Flo+ – A Custom formula that reduces organic sediment (muck), where Milfoil takes root.
Clean & Clear – Concentrated enzyme that acts as a catalyst to help C-flo+ microbes’ biodegrade decaying and dead plant material and organic muck.
C-FLO P – microbial pellet formulation to significantly reduce heavy metals, toxic ammonia and unwanted excess phosphorus.