The label is the law. Rates and restrictions below are taken from the product labels listed under Sources. Your product's own label governs; read it before you mix or apply. Mixing calculator · Disclaimer
- Active ingredient
- Clethodim
- Chemical class
- Cyclohexanedione ('dim'); WSSA Group 1 acetyl CoA carboxylase (ACCase) inhibitor.[2][1]
- Mode of action
- WSSA Group 1: Acetyl CoA carboxylase (ACCase) inhibitors (cyclohexanediones)[2][1]
- Signal word
- V-10137 1 EC Herbicide (sold as Envoy Plus Herbicide and Select Max Herbicide with Inside Technology): Caution[1]
Plants tested as tolerant
The ornamental tables list trees such as maples, oaks, dogwood and redbud; ground covers like liriope, English ivy and vinca; flowers including daylily, hosta, iris and marigold; and shrubs such as azalea, boxwood, holly, juniper and rose.[1]
Slight speckling has been seen on sweet alyssum, petunia, snapdragon, azalea and nandina. For anything unlisted, the label advises testing a few plants first.[1]
Perennial grasses take repeat sprays
Bermudagrass is sprayed at about 3 inches tall or with runners up to 6 inches, and quackgrass at 4 to 8 inches. A repeat application is made if regrowth appears.[1]
Where it is used
Grass lawns are not a safe target. The label says turf and other grass crops are highly sensitive and may be injured or killed if the spray reaches them.[1]
Spray only actively growing grass at the listed heights; most annual grasses are treated at 2 to 6 inches. Drought, heat, cold or flooding stress cuts uptake and control.[1]
Hold off if rain is expected within an hour, and wait at least a day before following with a broadleaf herbicide. Expect grass to yellow and collapse over 7 to 14 days.[1]
Around ornamentals, use a non-ionic surfactant rather than crop oil concentrate, which the label says may injure flowers and foliage.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| V-10137 1 EC Herbicide (sold as Envoy Plus Herbicide and Select Max Herbicide with Inside Technology)[1] | Valent U.S.A. LLC | 59639-132 | 12.6% | emulsifiable concentrate (0.97 lb clethodim per gallon) | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| V-10137 1 EC Herbicide (sold as Envoy Plus Herbicide and Select Max Herbicide with Inside Technology) | Landscape ornamentals, nurseries, parks, roadside plantings and greenhouses | Crabgrass, goosegrass, foxtails, barnyardgrass, sandbur, annual bluegrass, bermudagrass, quackgrass and rhizome johnsongrass | 0.3–0.8 fl oz product per 1,000 sq ft[1] The label's 12 to 32 fl oz per acre works out to roughly 0.3 to 0.8 fl oz per 1,000 sq ft. Add a non-ionic surfactant at 0.25% (1 pint per 50 gallons) and space repeats at least 14 days apart, no more than 64 fl oz per acre per year. |
| V-10137 1 EC Herbicide (sold as Envoy Plus Herbicide and Select Max Herbicide with Inside Technology) | Spot spraying grass with a hand sprayer or hand gun | Labeled annual and perennial grasses | 0.44–0.85 oz product per gallon of water[1] That is a 1/3 to 2/3% mix. Wet the grass without letting spray run off, and add surfactant (0.33 oz per gallon) or crop oil (1.3 oz per gallon) where the use calls for it. |
Safety and environmental hazards
People
Signal word CAUTION: causes moderate eye irritation and is harmful if swallowed, and repeated skin contact may trigger allergic reactions in some people. Handlers wear long sleeves, long pants, chemical-resistant gloves, shoes, socks and protective eyewear.[1]
Pets
The label groups people and domestic animals under the same eye, swallowing and skin warnings. For non-farm uses, keep unprotected people away from the spray area and out of treated areas until sprays have dried.[1]
Bees and pollinators
The label warns the product is toxic to plants and may harm the forage and habitat of non-target organisms, including pollinators, beside the treated area, so follow its drift directions closely.[1]
Fish and water
Don't apply directly to water, where surface water is present, or where runoff is likely, and don't contaminate water when rinsing equipment.[1]
Common questions
- Will clethodim kill my lawn?
- It can. The label says turf is highly sensitive and may be injured or killed, so it is meant for beds and plantings, not lawns.[1]
- Does clethodim kill nutsedge or broadleaf weeds?
- No. The label states it does not control sedges or broadleaf weeds.[1]
- How much clethodim per gallon for spot spraying?
- Mix 0.44 to 0.85 oz of product per gallon of water, a 1/3 to 2/3% solution, plus the required adjuvant.[1]
Sources
- U.S. EPA Pesticide Product Label System, “V-10137 1 EC Herbicide (Envoy Plus / Select Max) label, EPA Reg. No. 59639-132 (EPA-stamped, Apr. 6, 2026).” www3.epa.gov/pesticides/chem_search/ppls/059639-00132-20260406.pdf (accessed 2026-10-06)
- Weed Science Society of America, “Summary of Herbicide Mechanism of Action According to the Weed Science Society of America.” wssa.net/wp-content/uploads/WSSA-Mechanism-of-Action.pdf (accessed 2026-10-06)