Small cluster of quillworts growing underwater.

Control Quillworts

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


Manual/Mechanical Control:

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


Herbicide Control:

We have a few possible options for how to kill quillworts that may offer control.

  1. Dibrox (for ponds or lakes) – liquid that is diluted with water and sprayed over the plants, fast acting.
  2. Spritflo (for ponds with no outflow) – liquid that is poured and spreads throughout the entire body of water, offers extended control.
  3. Semera or Flumigard + surfactant (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.


Treatment Tips:

When treating quillworts,

  • Spritflo can be used at the first signs of growth.
  • With other herbicides, treat when the plants are established and actively growing.
  • Quillworts are not listed on any of the above herbicide labels, but they are broad spectrum herbicides and will control a wide variety of weeds.
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