Herbicide label reference
SedgeHammer+
5% halosulfuron-methyl water-dispersible granules · EPA Reg. No. 81880-24
What’s in this formulation
- Halosulfuron-methyl
- 5%
Active ingredient percentages are by weight. Compare the exact registration number and formulation on your container.
Label scope and conditions
EPA-accepted master label, residential-lawn use only. Marketed labels may use a subset of these claims. Match the registration and formulation, and follow the label on your container; this reference is not a replacement for it.
- Use only on established lawn grasses; nutsedge timing, stress, mowing and reseeding restrictions apply. Keep people and pets off treated areas until sprays dry.
- SedgeHammer+ includes a surfactant; the 75% SedgeHammer formulation has separate adjuvant directions. Do not interchange their mixing instructions.
This page summarizes coverage and does not provide application rates or mixing instructions. Use the complete label on your container for directions, protective equipment, reentry, environmental precautions, and restrictions.
Listed lawn grasses
- Kentucky bluegrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Tall fescue — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Fine fescues — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Perennial ryegrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Creeping bentgrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Bahiagrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Kikuyugrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Zoysiagrass (check cultivar) — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Bermudagrass (check cultivar) — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Seashore paspalum — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Centipedegrass — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- St. Augustinegrass (cultivar must be checked) — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
- Buffalograss — Established turf only. Follow the grass-specific rate and cultivar restrictions in the label.
A listed grass is not an unconditional compatibility claim. Cultivar, establishment, temperature, stress, timing, and rate restrictions still apply.
Source record
Current registrant in the checked EPA record: CANYON GROUP LLC.
Source label registration: 81880-24. Accepted 2020-08-28. Transferred registrations can have a source label bearing the prior registration number.
Residential-lawn label claims
Weeds and coverage
“Conditional activity” flags undifferentiated control/suppression or unresolved weed identity and label conditions. “No activity” is an explicit label entry. An absent weed is not evidence that the product cannot affect it.
| Weed | Timing & activity | Conditions & evidence |
|---|---|---|
| Annual kyllinga | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Burcucumber | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Common cocklebur | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Common groundsel | Postemergence No activity | PDF pp. 11–12; Weeds Controlled chart, NA entries |
| Common lambsquarters | Postemergence No activity | PDF pp. 11–12; Weeds Controlled chart, NA entries |
| Common milkweed | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Common pokeweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Common purslane | Postemergence No activity | PDF pp. 11–12; Weeds Controlled chart, NA entries |
| Common ragweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Common sunflower | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Corn spurry | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Galinsoga (label group) | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Giant ragweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Green kyllinga | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Honeyvine milkweed | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Horsetail | Postemergence Listed control | Control is limited to horsetail less than 6 inches tall after leaf-out; taller horsetail is suppression only. Follow the separate residential-turf directions on PDF p. 11. PDF p. 11; residential-turf application instructions |
| Jimsonweed | Postemergence No activity | PDF pp. 11–12; Weeds Controlled chart, NA entries |
| Kochia | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Ladysthumb | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Pennsylvania smartweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Philadelphia fleabane | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Purple nutsedge | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Redroot pigweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Rice flatsedge | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Shepherd's purse | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Smooth pigweed | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Tall and ivyleaf morningglory | Postemergence Suppression | PDF pp. 11–12; Weeds Controlled chart, S entries |
| Velvetleaf | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Venice mallow | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Wild mustard | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Wild radish | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |
| Yellow nutsedge | Postemergence Listed control | Follow the weed-specific timing and repeat-application directions; label resistance precautions apply. PDF pp. 11–12; Weeds Controlled chart and residential-lawn directions |