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Crop Protection Database

Clomazone

Action/Use:
  • Herbicide
Use: A selective, preplant-incorporated herbicide. Some foliar activity. Offsite movement can whiten or yellow plant foliage. For use in beans, cabbage, cotton, cucumbers, melons, peas, peppers, rice, soybeans, squash, sugarcane, sweet potato, tobacco, tuberous and corm vegetables; weeds in chemical fallow wheat fields. Cerano* for rice. Strategy* for cucurbits. Viper* for rice.
Identification
Common Name(s): Clomazone (ANSI, BSI, ISO draft)
Chemistry
Properties: Light brown viscous liquid. Specific gravity 1.192 at 20°C. Vapor pressure 1.92 x 10-2 Pa at 25°C, (1.44 x 10-4 mmHg).
Clomazone
Mode of Action / Resistance Management
Chemical Group: Isoxazolidinone
Mode of Action: Bleaching inhibition of carotenoid biosynthesis (unknown target)
Action Group: HRAC Group F3; WSSA Group 13
Registration
U.S.A.: Command*.
Environmental Guidelines
Water Solubility: 1100 ppm
Safety Guidelines
Signal Word: WARNING (4EC), CAUTION
Toxicity Class: II, III
Toxicity: Tech: (Rat): Oral LD50 1369 mg/kg (female); 2077 mg/kg (male). (Rabbit): Dermal LD50 >2000 mg/kg
Handling/storage Cautions: Store above 40°F. If frozen, warm to 60°F and shake or roll container
Protective Clothing: Long-sleeved shirt and long pants. Protective eyewear.
Discontinued Names:
Command Cotton*
Commence*
Commit*
Gamit*
Magister*
Merit*