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Crop Protection Database

Methomyl

Action/Use:
  • Insecticide
Use: For use in fruits, cotton, soybeans, vegetables, and other field crops.
Identification
Common Name(s): Methomyl (ANSI, ISO, BSI, JMAF, ESA)
Chemistry
Class: Carbamate.
Properties: White crystalline solid, with slightly sulfurous odor. Melting point 78°-79°C. Solubility in ethanol, 42 g/100 g; in methanol, 100 g/100 g. Soluble in ethanol, 42 g/100 g; in methanol, 100 g/100 g.
Methomyl
Mode of Action / Resistance Management
Chemical Group: Carbamate
Mode of Action: Acetylcholine esterase inhibitor
Action Group: IRAC Group 1
Environmental Guidelines
Hazards: Fish: Toxic. LC50 3.4 mg/l (96 h) (rainbow trout) 0.8 mg/l (bluegill). Bee: Highly toxic
Soil Particle Adsorption: Half-life of 3-5 days following leaf application
Water Solubility: 5.8 g/100 g
Safety Guidelines
Signal Word: DANGER
Toxicity Class: I
Toxicity: (Rat): Oral LD50 30 mg/kg (female), 34 mg/kg (male). (Rabbit): Dermal LD50 >2000 mg/kg. Inhalation (4 h), 0.3 mg/l
Handling/storage: Liquid concentrate may be fatal if swallowed; poisonous if inhaled. Do not breathe dust or spray mist. Do not get in eyes, on skin, or on clothing. Liquid formulations are flammable. Keep away from heat, sparks, and open flame. Do not subject liquid to temperatures below 32°F. Store in original container only. Discarded product is a hazardous waste under RCRA regulations
Protective Clothing: Protective eyewear. Approved respirator.
Suppliers and Branded Products
Basic Producers:
Bayer CropScience (Kipsin*, Methavin*)
Kukbo Science Co., Ltd. (Fly Knock Down*)
Pyosa, S.A. de C.V. (Metox-900*)
Sundat (S) Pte. Ltd. (Kilon*, Sunthomyl*)
Premix Products:
+ Diflubenzuron
+ Endosulfan
Discontinued Names:
Katal*
Laminate*
Memilene L*
Methopaz*
Methoxyl*
Methylan*
Metofan*
Mie Duo Wei*
Nu-Bait II*
Nudrin*
Sutilo*
Wai Ling*