Eurasian Watermilfoil

Control Milfoil

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

 

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 lakes) – granules that are broadcast over the plants.
  5. Aquathol K/Super K (for 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.
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