Control Curly Leaf Pondweed

Curly Leaf Pondweed, along with other invasive plants, are fortunately very weak, and easy to kill with herbicides. While it is easy to kill existing curly leaf pondweed plants, it does take time to eradicate curly leaf pondweed colonies. This plant grows from turions, or seeds, that can remain viable in the sediment for 5-7+ years. Depending on how long this plant has been in your water, it may take that many years or more to get it completely out. Stop curly leaf pondweed from taking over your pond or lake by controlling this aquatic invasive species with the options below.

Click here to read more about identifying this plant.

Manual/Mechanical Control:

If you are considering how to remove curly leaf pondweed, physically pulling this plant and digging up the roots can be a somewhat effective method of control. However, physical control can be difficult.

Herbicide Control:

Curly leaf pondweed is susceptible to almost any herbicide, except 2,4-D! Use one of the options below for how to kill curly leaf pondweed that offer great control.

1. Spritflo (for ponds with no outflow) – liquid that is poured and spreads throughout the entire body of water, offers extended control.
2. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting.
3. Semera or Flumigard (for ponds or lakes) – granules that are dissolved and mixed or liquids that are mixed and diluted with water and sprayed over the plants (early morning is best), fast-acting.
4. Hydrothol (for 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.

Treatment Tips:

When treating curly leaf pondweed,

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