How Do You Control Rushes

Liquid glyphosate formulations have been effective on common rush above the water line, but ineffective on plants in the water. They are broad spectrum, systemic herbicides. Systemic herbicides are absorbed and move within the plant to the site of action.

What is the best way to kill rushes?

Rushes should be cut using a topper or mower to remove the dead material, allowing grass to regenerate. It will typically take one month for the plant to die and for the chemical to reach the root and kill the rhizomes. If there is any regrowth, farmers should retreat.

What is the best time of year to spray rushes?

MCPA is known to be a very volatile product and has continually been identified by NI Water as a source of water quality problems when treatment plants are trying to bring water to drinking standard,” Phelim added. To recap, the best time to control rushes is in early to mid-summer when growth rates are highest.