Duckweed Control

The most effective way to control duckweed is to create an environment that is unsuitable for the plant to grow; however, if you do have a duckweed outbreak there are certain curative products you can use to control the duckweed.  If you create movement in the water, minimize excess nutrients, and stay on top of duckweed you should be able to effectively control this pesky weed.

Duckweed is a small weed that floats on the surface of a pond and can sometimes completely cover the surface of your water. Duckweed is very resistant vegetation and can be very frustrating to control. The herbicide you would use to control duckweed is called Tsunami DQ, a diquat based herbicide. To control duckweed it is recommended to use the maximum rate of diquat to be effective.  All herbicides should be used according to label directions and with caution.  The maximum amount of Tsunami DQ that is suggested for a pond is two gallons per acre for duckweed control. It is recommended to add our surfactant called Plexmate to your spray mixture.  This surfactant will help the Tsunami DQ stick to the small surface of the duckweed for maximum penetration.  The most effective application for duckweed control is spray application and you may need to do a repeat treatment depending on the infestation.

            There are also actions you can take to help prevent duckweed from growing or at least slow it down.  Duckweed prefers to grow in areas that are stagnant; therefore, fountains and aeration systems that create constant surface movement may aid in duckweed control.  Duckweed also thrives in ponds that have excessive nutrients like fish waste, dead leaves, and dead weeds and algae.  Using beneficial pond bacteria can help minimize the amount of excessive nutrients in your pond and aid in duckweed control. 

For more information on duckweed control Contact Sanco.