Nutsedge in Emerald Zoysia: UC IPM Guide Is the Gold Standard

Zoysia lawn invaded by nutsedge (nutgrass) and other weeds. Pulling fails. Need selective control.

Go Straight to the Expert Source

UC Davis IPM Pest Note 7432: Nutsedge Management. Covers ID, biology, cultural & chemical control for turf.

Key Takeaways

• Nutsedge = sedge, not grass. Needs halosulfuron (SedgeHammer), sulfentrazone, or imazosulfuron.
• Apply when actively growing, warm soil, good moisture.
• Multiple apps needed—tubers persist.
• Improve drainage; nutsedge loves wet soil.

Don't guess. Use the research-based guide.