Green Kyllinga (Kyllinga brevifolia): Identification & Selective Herbicide Matrix
Quick Agronomic Summary
Halosulfuron (SedgeHammer+) or Sulfosulfuron (Certainty) selectively eradicates Green Kyllinga across warm- and cool-season turf.
- Diagnostic Marker 1: Low-growing, mat-forming perennial sedge with dark green triangular stems
- Diagnostic Marker 2: Sweet, aromatic fragrance emitted from creeping rhizomes when crushed
- Diagnostic Marker 3: Single, compact, globe-shaped green seedhead subtended by three long leafy bracts
What herbicide kills Green Kyllinga?
Halosulfuron (SedgeHammer+) or Sulfosulfuron (Certainty) selectively eradicates Green Kyllinga across warm- and cool-season turf.
Kyllinga forms aggressive mats under close mowing. Two applications of SedgeHammer 4 to 6 weeks apart destroy the extensive rhizome network.
When to spray Green Kyllinga?
Treat in early summer when daytime temperatures reach 70°F–85°F and plants are actively growing.
Ensure a non-ionic surfactant is included in the mix to coat the shiny waxy foliage.
EPA-Registered Herbicides Labeled for Green Kyllinga
The table below compares all selective herbicides in our database that control Green Kyllinga, including active ingredient groups, application temperature limits (°F), and surfactant requirements.
| Brand Name & EPA Reg. | Active Ingredient & WSSA Group | Temp Window (°F) | Surfactant & Mixing Protocol | Where to Buy |
|---|---|---|---|---|
| SedgeHammer+ EPA Reg. 81880-24-10163 |
Halosulfuron-methyl 5% Group 2 (ALS Inhibitor / Sulfonylurea) |
60°F – 90°F Rainfast: 4h |
SedgeHammer+ single-scoop pouches already contain a built-in non-ionic surfactant. If using bulk SedgeHammer 75WG, add 2 tsp NIS per gallon. | Check Price at DoMyOwn View on Amazon |
| Certainty Turf Herbicide EPA Reg. 59639-138 |
Sulfosulfuron 75% Group 2 (ALS Inhibitor / Sulfonylurea) |
60°F – 90°F Rainfast: 3h |
Mandatory Non-Ionic Surfactant (NIS) at 1 tsp (0.25% v/v) per gallon of water. Frequently tank-mixed with Celsius WG for complete southern weed control. | Check Price at DoMyOwn View on Amazon |
| Image Kills Nutsedge EPA Reg. 228-719 |
Imazaquin 3.3% Group 2 (ALS Inhibitor / Imidazolinone) |
65°F – 90°F Rainfast: 6h |
Ready-to-mix liquid formulation contains surfactant; additional NIS is not required for standard broadcast or spot treatments. | Check Price at DoMyOwn View on Amazon |
Turfgrass Compatibility Matrix for Green Kyllinga Herbicides
Always verify that your chosen herbicide is safe for your specific lawn grass before broadcast spraying:
How to Distinguish Green Kyllinga from Lookalike Weeds
| Lookalike Species | Key Botanical & Diagnostic Difference |
|---|---|
| Yellow Nutsedge | Yellow nutsedge grows erect with golden spiky seedheads and underground tubers; Kyllinga forms dense horizontal mats with round green button-like heads. |