Cogongrass in field.

Control Cogongrass

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


Manual/Mechanical Control:

If you are considering how to remove cogongrass, physically cutting, mowing, or burning this plant can be a somewhat effective method of control, but the rhizomes must be destroyed for full eradication.


Herbicide Control:

We have a possible option for how to kill cogongrass that may offer control.

  1. Cattail and Water Lily Control (Imox + surfactant) (for ponds or lakes) – liquids that are mixed and diluted with water and sprayed over the plants.


Treatment Tips:

When treating cogongrass,

  • With Imox or other systemic herbicides, treatment is most effective when the plants are mature or close to full grown. This allows for more plant surface to spray enough mixture on.
    • Treat in late summer to early fall to get better kill of the root systems. At this time, plants are pulling energy into their roots to store for the winter.
  • Cogongrass is not listed on the Imox label, but Imox is a broad spectrum herbicide and will control a wide variety of weeds.
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