Coontail, Ceratophyllum demersum, is a non-rooted aquatic plant that grows underwater. Stems can grow up to 11 feet long! Produces bushy green needle-like leaves. Coontail is often confused with watermilfoil. Milfoil is more feather-like whereas coontail is more stiff and spiny. Coontail is a native aquatic plant throughout the US.
Coontail provides a number of benefits to ponds including fish habitat and nutrient uptake.
Because there is no root system, coontail can take over a pond if left unmanaged.
Coontail can be removed with rakes. Weeds will reproduce through fragmentation. It is important to remove all vegetation. Once removed you don’t have to worry about regrowth because there is no root system to reestablish.
Chemical treatment options:
Aquathol K provide excellent control of coontail. This treatment yields quick results and has no water use restrictions.
Navigate granular herbicide is a good treatment option. Early season control is ideal.
Tsunami DQ provides fast control of coontail. To improve results mix with Cutrine (1 qt Tsunami, 1 gal Cutrine). This is a contact herbicide. Must come in contact in order to kill.
Sonar provides a long term management solution for coontail. Sonar reacts slowly, taking 30-60 days for results. The entire pond must be treated for success. This treatment option is only for ponds with little or no flow coming into the pond. Sonar AS, and Sonar RTU are available options