Pyrazosulfuron-ethyl
Action/Use:
- Herbicide
Use:
Controls weeds and sedges in direct-seeded and transplanted paddy rice.
Identification
Common Name(s): Pyrazosulfuron-ethyl (ISO, BSI)
Chemistry
Class: Sulfonylurea.
Properties: White crystalline solid. Melting point 181-182°C. Soluble in chloroform, and ethyl acetate.
Mode of Action / Resistance Management
Chemical Group: Sulfonylurea
Mode of Action: Inhibition of acetolactate synthase ALS (acetohydoxyacid synthase AHAS)
Action Group: HRAC Group B; WSSA Group 2
Registration
Outside U.S.A.: Sirius* in China, Japan, Southeast Asia, South America, South Korea.
Environmental Guidelines
Water Solubility: 1494 ppm at 25°C (pH7)
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: Sirius*: (Rat): Oral LD50 >5000 mg/kg; Dermal >2000 mg/kg
Handling/storage Cautions: Avoid eye, skin contact. Avoid water and moisture contamination. Store in original container, tightly closed, in a cool, dry, and well ventilated place. Keep out of the reach of children. Do not store with food or feed
Protective Clothing: Chemical-resistant gloves. Protective eyewear.
Suppliers and Branded Products
Basic Producers:
Crystal Chemical Inter-America (Acord*)
Fertiagro Pte. Ltd. (Fertirus*)
Hubei Sanonda Co., Ltd. (Billy*)
Nissan Chemical Industries, Ltd. (Agreen*, Sirius*)
Pilar AgriScience (Canada) Corp. (Pilarice*)
Wangs Crop-Science Co., Ltd. (Pillar*)
Formulators' Trade Names:
Insecticidas Internacionales, C.A. (Sideral*)
B.V. Industrie- & Handelsonderneming Simonis (Wopro-pyrazosulfuron*)
United Phosphorus Ltd. (Saathi*)
Willowood Ltd. (Junco*)
Premix Products:
+ Dimethametryn+ Esprocarb+ Pretilachlor
- Sparkstar G* — Syngenta
+ Esprocarb
- Contract* — Syngenta
+ Mefenacet
- ACT* — Bayer CropScience
+ Molinate
- New Sonori* — SM-BT Co., Ltd.
+ Pretilachlor
- Long Miao* — Shanghai Agro-Chemical Industry Co., Ltd.
- SAATHI Gold* — United Phosphorus Ltd.
- Trident* — United Phosphorus Ltd.
+ Propanil
- Pyrasulfonil*
+ Quinclorac
- Viricet* — Vietnam Pesticide Joint Stock Co. (VIPESCO)
Discontinued Names:
Chao Jing*
Kalcorn*
Saathi Super*
