Use: Nonselective, imidazolinone herbicide applied preemergence or postemergence for long-term total vegetation control. Readily absorbed through foliage and roots. Controls grasses, broadleaf weeds, and woody species in noncrop areas such as railroad, utility, pipeline rights-of-way, utility plant sites, petroleum tank farms, pumping installations, fence rows, storage areas, etc. Kifix* for use on rice.
Common Name(s): Imazapyr (ISO-E draft, ISO-F draft, isopylamine salt)
Mode of Action / Resistance Management
Chemical Group: imidazolinone
Mode of Action: inhibition of acetolactate synthase ALS (acetohydoxyacid synthase AHAS)
Action Group: HRAC Group B; WSSA Group 2
Outside U.S.A.: Kifix* in Brazil.
Water Solubility: Tech: 15,000 ppm. Arsenal*: miscible; Chopper*: soluble
Signal Word: CAUTION
Toxicity Class: III
Toxicity: (Rat): Oral LD50 5000 mg/kg. (Rabbit): Dermal LD50 >2148 mg/kg. Mild eye, skin irritation
Handling/storage: Store above 10°F. Once mixed, solution can be stored in spray tank until ready to be applied
Protective Clothing: Chemical-resistant gloves. Chemical-resistant apron when cleaning equipment, mixing, or loading.
Suppliers and Branded Products
Agro-Care Chemical Industry Group Limited (Imazcare*)
BASF Corporation (Arsenal*, Chopper*, Habitat*, Stalker*)
IPESA S.A. (Katrin*, Katrin Forestal*)
Makhteshim Agan Group (Ecoimazapyr*, Rotary*)
Nufarm Americas Inc. (E-Pro 4, Polaris*)
Formulators' Trade Names:
+ Aminocyclopyrachlor+ Metsulfuron-methyl
- Viewpoint* — DuPont Crop Protection
+ Imazethapyr+ Mefluidide
- Stronghold* — PBI/Gordon Corp.
- Lineage* Clearstand* — DuPont Crop Protection