Imazethapyr 
Action/Use:
- Herbicide
Use:
A selective postemergence herbicide effective in controlling broadleaf weeds and some annual grasses. For use in alfalfa, dry and edible beans, peanuts, peas, Clearfield* rice, soybeans, and imidazolinone resistant/tolerant corn (IMI-Corn). Contour* and Resolve* for use only on IMI-Corn. Clearpath* for use on Clearfield* rice. OpTill* for use on soybeans, chickpeas, and peas. Sharpen* for use on cereals, corn, cotton, fallow, grain sorghum, soybeans, and sunflower. OpTill* PRO for use on soybeans.
Identification
Common Name(s): Imazethapyr (ANSI, ISO, BSI, draft)
Chemistry
Class: Imidazolinone.
Formula: C15H19N3O3.
Properties: Colorless crystals. Melting point 169°-173°C. Soluble in organic solvents at 25°C; acetone 48.2 g/l; methanol 105 g/l; toluene 5 g/l; dichloromethane 185 g/l. Pursuit*: Clear dark brown or green liquid; musty odor.
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
Registration
Outside U.S.A.: Argentina, Brazil, India (Cheminova A/S); Argentina (IPESA S.A.).
Environmental Guidelines
Water Solubility: Miscible
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: (Rat): Oral LD50 >5000 mg/kg. (Rabbit): Dermal >2000 mg/kg. Mild skin and reversible eye irritant
Handling/storage Cautions: Do not store below 32°F
Product/waste Disposal: Container disposal: triple rinse, then offer for recycling or reconditioning or puncture and dispose of in a sanitary landfill or incineration or, if allowed by state and local authorities, by burning. If burned, stay out of smoke
Suppliers and Branded Products
Basic Producers:
Albaugh, Inc. (Thunder*)
BASF Corporation (Newpath*, Pivot*, Pursuit*)
Cheminova A/S (Dinamaz*)
Hualong Chemical Industry Co., Ltd. (Deltapir*)
IPESA S.A. (Verosil*)
Makhteshim Agan Group (Vezir*)
Milenia Agrociencias S.A. (Vezir*)
Pilar AgriScience (Canada) Corp. (Pilargrass*)
Shandong Kesai Eagrow Co., Ltd. (Eagrow*)
Wangs Crop-Science Co., Ltd. (Immediate*)
Formulators' Trade Names:
Devidayal Sales Limited (Devisuit*)
Hektas Ticaret T.A.S. (Viper*)
M/S HPM Chemicals and Fertilizers Ltd. (Cheetah*)
SAFA TARIM A.S. (Purtima*)
B.V. Industrie- & Handelsonderneming Simonis (Wopro-imazethapyr*)
Stockton Agrimor AG (Majesty Gold*, Zampyr*)
Villa Crop Protection (Mallet*)
Willowood Ltd. (Patriot*)
Premix Products:
+ Dicamba
- Resolve* — BASF Corporation
+ Dimethenamid-P+ Saflufenacil
- OpTill* PRO — BASF Corporation
+ Glyphosate
- Extreme* — BASF Corporation
- Prince Gold* — Stockton Agrimor AG
- Thunder Master* — Albaugh, Inc.
+ Imazapyr
- Cristal* — IPESA S.A.
- Lightning* — BASF Corporation
+ Imazapyr+ Mefluidide
- Stronghold* — PBI/Gordon Corp.
+ Imazaquin+ Pendimethalin
- Steel* — BASF Corporation
+ Pendimethalin
- Pursuit Plus* — BASF Corporation
+ Quinclorac
- Clearpath* — BASF Corporation
+ Saflufenacil
- OpTill* — BASF Corporation
+ Sulfentrazone
- Authority* Assist — FMC Corp.
+ Trifluralin
- Passport* — BASF Corporation
Discontinued Names:
Contour*
Dinamaz*
Majesty*
Tackle*
Vrilec*
