Herbicide label reference
Tenacity
40% mesotrione suspension concentrate · EPA Reg. No. 100-1267
What’s in this formulation
- Mesotrione
- 40%
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.
- St. Augustinegrass use is limited to sod production, so it is excluded from this residential-lawn reference. Do not apply to other unlisted grasses.
- Postemergence coverage is for young, actively growing weeds; the label calls for a nonionic surfactant and repeat applications. Seeding and fine-fescue restrictions apply.
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.
- Centipedegrass — 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: SYNGENTA CROP PROTECTION, LLC.
Source label registration: 100-1267. Accepted 2022-09-28. 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 bluegrass | Postemergence No activity | PDF p. 13; Weeds Controlled, postemergence column N |
| Annual bluegrass | Preemergence Suppression | PDF p. 13; Weeds Controlled, preemergence column |
| Annual sowthistle | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Barnyardgrass | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Barnyardgrass | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Buckhorn plantain | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Buckhorn plantain | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Canada thistle | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Carpetweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Carpetweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Catsear dandelion | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Common chickweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Common chickweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Common lambsquarters | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Common lambsquarters | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Common purslane | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Common purslane | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Creeping bentgrass | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Creeping bentgrass | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Curly dock | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Dandelion | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Florida betony | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Florida pusley | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Goosegrass | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Ground ivy | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Hairy buttercup | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Hairy galinsoga | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Hairy galinsoga | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Healall | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Henbit | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Horseweed | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Large crabgrass | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Large crabgrass | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Large hop clover | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Large hop clover | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Lawn burweed | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Mouseear chickweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Mouseear chickweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Nimblewill | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Pale smartweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Pale smartweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Pennsylvania smartweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Pennsylvania smartweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Persian speedwell | Preemergence Listed control | PDF p. 15; Weeds Controlled, preemergence column |
| Purslane speedwell | Preemergence Listed control | PDF p. 15; Weeds Controlled, preemergence column |
| Redroot pigweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Redroot pigweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Shepherd's purse | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Shepherd's purse | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Smooth crabgrass | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Smooth crabgrass | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Smooth pigweed | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Smooth pigweed | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Southern crabgrass | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Southern crabgrass | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Swinecress | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Tufted lovegrass | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Verbena | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| White clover | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| White clover | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Wild carrot | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Wild carrot | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Wild violet | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Windmillgrass | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Yellow foxtail | Postemergence Listed control | Young actively growing weeds; repeat application and label adjuvant required. Crabgrass and goosegrass: best results before four tillers. PDF pp. 13–16; Weeds Controlled, postemergence column |
| Yellow foxtail | Preemergence Listed control | Apply before germination; follow new-seeding and fine-fescue restrictions. PDF pp. 13–15; Weeds Controlled, preemergence column |
| Yellow nutsedge | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |
| Yellow woodsorrel | Postemergence Listed control | Young actively growing weeds; repeat applications and label adjuvant needed. Creeping bentgrass and nimblewill have separate sequential-application directions. PDF pp. 14–16; Weeds Controlled and postemergence directions |