Mechanical cultivation and postemergence applications of MSMA provide the most consistent suppression of nutsedge. Temperatures above 80 degrees are necessary for maximum activity. Spray coverage of only the lower third or fourth of the nutsedge plants is usually adequate for control. Grasses can be readily controlled with Assure, Fusilade, Poast Plus, or Select. Control of perennials such as johnsongrass and bermudagrass often requires two applications.
Effectiveness is reduced for grasses under moisture stress.
Nutsedge is not affected by these materials. Bermudagrass Bermudagrass is increasing as a problem across the state. Successful control usually requires multiple treatments. Hooded or Shielded Spray Applications Hooded or shielded spray applications are becoming more widely used in both conventional and conservation tillage cotton production. Numerous commercial and farmer-made sprayers have been used to apply Gramoxone Extra, Roundup, and other herbicides.