Bensulfuron-methyl

Action/Use:

Herbicide

Use: Londax* for selective control of most broadleaf and sedge weeds in rice.

Identification

Common Name(s): Bensulfuron-methyl (ANSI, BSI, WSSA, ISO draft)

Chemistry

Class: Sulfonylurea.

Properties: Odorless, white to pale yellow solid. Melting range 185�-188�C. Soluble in methylene chloride, relatively soluble in acetonitrile, ethyl acetate, acetone, methanol.

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

U.S.A.: Registered.

Outside U.S.A.: Escuri*; Londax* marketed in most rice-growing countries.

Environmental Guidelines

Water Solubility: 2.9-1200 ppm at 25�C, pH 5-8

Safety Guidelines

Signal Word: WARNING

Toxicity Class: II

Toxicity: (Rat): Oral LD₅₀ >5000 mg/kg. (Rabbit): Dermal LD₅₀ >2000 mg/kg. Nonmutagenic, noncarcinogenic. Nonirritating to skin, eyes

Handling/storage: Causes substantial but temporary eye injury. Do not get in eyes or on skin or clothing. Harmful if swallowed or absorbed through skin. Store in original container only in a cool, dry place

Protective Clothing: Long-sleeved shirt and long pants. Waterproof gloves. Shoes plus socks. Protective eyewear.

Suppliers and Branded Products

Basic Producers:

Agro-Care Chemical Industry Group Limited

Crystal Chemical Inter-America (Escuri*)

FFC Limited

General Chemical Co., Ltd.

Hangzhou March Chemicals Co. Ltd.

Hualong Chemical Industry Co., Ltd.

IFC International Co., Ltd.

Jiangsu Institute of Ecomones Co., Ltd.

Jingma Chemicals Ltd.