Control Milfoil

Many people ask how to get rid of watermilfoil. The following options can be considered for how to control watermilfoil.

Click here to read more about identifying this plant.

Manual/Mechanical Control:

If you are considering how to remove watermilfoil, physically raking this plant and digging up the roots can be a somewhat effective method of control. However, physical control can be difficult. Watermilfoil can re-grow from any roots or fragments remaining in the water.

Herbicide Control:

There are multiple options for how to kill watermilfoil that offer great control.

1. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting.
2. Hydrothol (for lakes) – granules that are broadcast over the plants.
3. Liquid 2, 4-D (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants. Most effective on treatment areas larger than a half-acre, this allows longer contact exposure time.
4. Navigate 2, 4-D (for ponds or lakes) – granules that are broadcast over the plants.
5. Aquathol K/Super K (for ponds or lakes) – liquid that is diluted with water and sprayed or granules that are broadcast over the plants.
6. Spritflo (for ponds with no outflow) – liquid that is poured and spreads throughout the entire body of water, offers extended control. Will offer some control.

When treating watermilfoil,

• Spritflo can be used at the first signs of growth.
• With other herbicides, treat when the plants are established and actively growing.