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
- Fluazifop-P-butyl (CAS 79241-46-6)
- Chemical class
- Aryloxyphenoxypropionate (a 'FOP'); WSSA Group 1 ACCase inhibitor.[2][1]
- Mode of action
- WSSA Group 1: ACCase inhibitors (aryloxyphenoxypropionates, 'FOPs')[2][1]
- Signal word
- Fusilade DX Herbicide: Caution[1]
A farm product, not a lawn product
Fusilade DX is labeled for food crops, non-bearing crops, fallow farm land and noncrop farm areas such as fence rows and equipment yards. For the non-bearing and noncrop uses, the label says not to use or store it in or around the home.[1]
It only kills grasses. Grass crops are highly susceptible, so the label warns against drift onto any other crop or non-target area.[1]
Replanting after fluazifop
Wait 6 months after the last application before planting corn, and 12 months before planting any crop not listed on the label, or illegal residues may occur.[1]
Where it is used
Treat young grass that is actively growing and not stressed by drought, heat, poor fertility or injury. Don't spray grass that has tillered, formed seed heads or grown past the label's listed stages.[1]
Every spray needs an additive: crop oil concentrate or nonionic surfactant. For a 1-gallon spot sprayer, that's 0.75 fl oz of product plus either 1.5 fl oz of crop oil or 0.5 fl oz of surfactant.[1]
It is rainfast in 1 hour, so skip the job if rain is expected within that hour. Growth stops soon after spraying, and yellowing or reddening usually shows within about a week.[1]
Perennial grasses often come back: the label calls for a second bermudagrass treatment when regrowth appears, usually about 4 weeks later. Avoid cultivating within 7 days before or after spraying.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Fusilade DX Herbicide[1] | Syngenta Crop Protection, LLC | 100-1070 | 24.5% | emulsifiable concentrate (2 lb fluazifop-P-butyl per gallon) | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Fusilade DX Herbicide | Non-bearing crops (fruit and nut trees, vines, conifers, nursery beds), fallow farm land, fence rows and areas around farm buildings | Annual grasses such as crabgrass, foxtails and barnyardgrass; perennial grasses such as bermudagrass, quackgrass and rhizome johnsongrass | 16–24 fl oz product per acre[1] Up to 3 applications a year, at least 14 days apart, and no more than 72 fl oz per acre per year. Torpedograss takes 24 fl oz per application and may need three applications. |
| Fusilade DX Herbicide | Spot treatment of grass weeds in labeled sites | Annual and perennial grass weeds listed on the label | 0.75 fl oz product per gallon of spray[1] Add 1.5 fl oz of crop oil concentrate or 0.5 fl oz of nonionic surfactant to each gallon. Spray for thorough coverage but not to runoff, and stay under the per-acre maximum. |
Safety and environmental hazards
People
Signal word CAUTION: harmful if absorbed through the skin or inhaled, and causes moderate eye irritation. Frequent skin contact may trigger allergic reactions in some people, so handlers wear chemical-resistant gloves, long sleeves, long pants, shoes and socks.[1]
Pets
For non-farm uses, the label forbids treating an area while unprotected people or domestic animals are present. Nobody enters without protective clothing until the spray has dried.[1]
Bees and pollinators
The label has no direct bee toxicity warning, but says the product is toxic to plants and can harm forage and habitat for pollinators next to the treated area if spray drifts.[1]
Fish and water
Toxic to fish and aquatic invertebrates. Don't apply directly to water or where runoff into water is expected; the label also says it can leach to groundwater in permeable soils and run off for months afterward.[1]
Common questions
- Does fluazifop kill broadleaf weeds or nutsedge?
- No. The Fusilade DX label says it does not control broadleaf weeds or sedges (nutgrass); it is a grass herbicide only.[1]
- How long does Fusilade DX need before rain?
- One hour. The label says it is rainfast 1 hour after application.[1]
- Will it kill bermudagrass?
- Bermudagrass is on its list of controlled perennial grasses when runners are 4 to 8 inches, and a second application is often needed when regrowth occurs.[1]
Sources
- U.S. EPA Pesticide Product Label System, “Fusilade DX Herbicide label, EPA Reg. No. 100-1070 (EPA-stamped, Sept. 17, 2025).” www3.epa.gov/pesticides/chem_search/ppls/000100-01070-20250917.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)