The label is the law. Read your product's label before you mix or apply; the rates here come from the labels listed under Sources.
- Active ingredient
- Zeta-cypermethrin (CAS 52315-07-8)
- Chemical class
- Pyrethroid; IRAC Group 3A sodium channel modulators.[2]
- Mode of action
- IRAC Group 3A: Sodium channel modulators: pyrethrins and pyrethroids[2]
- Signal word
- Mustang Maxx Insecticide: Warning[1]
Who can buy it
Mustang Maxx is restricted use: it is sold to and used only by certified applicators or people under their supervision.[1]
Where it is used
Each crop has its own limits on rate per application, applications per season, yearly total and days before harvest.[1]
When zeta-cypermethrin and cypermethrin products are used on the same crop, the combined seasonal total can't exceed the label's limits.[1]
It's a Group 3A insecticide, so rotate with other groups within and between seasons to slow resistance.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Mustang Maxx Insecticide[1] | FMC Corporation | 279-3426 | 9.15% | emulsifiable concentrate (restricted use) | Warning |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Mustang Maxx Insecticide | Broccoli, cabbage, cauliflower, kale, collards and other brassicas (one of many labeled crops) | Corn earworm, cucumber beetles, cutworms, diamondback moth, flea beetles, imported cabbageworm, leafhoppers; loopers and armyworms at higher rates | 2.24–4.0 fl oz product per acre[1] 2.24 to 4.0 fl oz per acre for most listed pests and 3.2 to 4.0 fl oz for loopers, armyworms and grasshoppers. On brassicas: at least 7 days apart, no more than 6 applications or 24 fl oz per acre a year, and not within 1 day of harvest. |
Safety and environmental hazards
People
Signal word WARNING: contains petroleum distillate, may be fatal if swallowed, and causes substantial but temporary eye injury. Prolonged skin contact may cause allergic reactions in some people.[1]
Pets
It is a restricted use agricultural product applied by certified applicators, not a home product.[1]
Bees and pollinators
Highly toxic to bees exposed to direct treatment or residues on blooming crops or weeds; don't apply or let it drift onto blooms bees are visiting.[1]
Fish and water
Restricted use due to toxicity to fish and aquatic organisms: it is extremely toxic to fish, aquatic invertebrates, oysters and shrimp.[1]
Common questions
- Why is Mustang Maxx a restricted use pesticide?
- Because of its toxicity to fish and aquatic organisms.[1]
- Is zeta-cypermethrin harmful to bees?
- Yes. The label says it is highly toxic to bees exposed to direct treatment or residues on blooming crops or weeds.[1]
- What group is zeta-cypermethrin?
- IRAC Group 3A, the pyrethroids, along with bifenthrin, permethrin and lambda-cyhalothrin.[2]
Sources
- U.S. EPA Pesticide Product Label System, “Mustang Maxx Insecticide (F9114 EC) label, EPA Reg. No. 279-3426 (EPA-stamped, Aug. 16, 2022).” www3.epa.gov/pesticides/chem_search/ppls/000279-03426-20220816.pdf (accessed 2026-10-06)
- Insecticide Resistance Action Committee, “IRAC Mode of Action Classification Scheme, Version 11.5 (Feb. 2026).” irac-online.org/documents/moa-classification/ (accessed 2026-10-06)