Diquat Dibromide
Action/Use:
- Herbicide
Use:
A fast-acting, nonselective, foliar-applied, contact herbicide and plant desiccant. Completely inactivated on contact with soil. Desiccation of potato vines, seed crops; control of sugarcane flowering; aquatic, industrial weed control.
Identification
Common Name(s): Diquat Dibromide (ANSI, ISO, BSI, JMAF, WSSA); ; Deiquat (Germany, Giant knotweed extract); ; Reglon (USSR)
Chemistry
Class: Bipyridylium.
Formula: C12H12Br2N2.
Properties: Dark brown liquid, odorless. Stable in neutral or acid solutions; decomposes in alkaline solutions. Slightly soluble in alcohols, hydroxylic solvents. Practically insoluble in nonpolar organic solvents.
Mode of Action / Resistance Management
Chemical Group: Bipyridlium
Mode of Action: Acts as contact. Absorbs energy produced by photosynthesis; forms peroxides that disrupt living cells
Action Group: HRAC Group D; WSSA Group 22
Registration
U.S.A.: Registered.
Environmental Guidelines
Hazards: Fish: LC50 (96 h) 21 mg/l (rainbow trout); 67 mg/l (mirror carp). Bird: Oral LD50 155 mg/kg (mallard duck). Bee: Oral LD50 22 µg/bee; nontoxic
Water Solubility: 700,000 ppm
Safety Guidelines
Signal Word: WARNING
Toxicity Class: II
Toxicity: (Rat): Oral LD50 600 mg/kg b.w. (Mouse): Oral LD50 125 mg/kg. (Rabbit): Dermal LD50 260 mg/kg b.w. (Rat): Inhalation LC50 (4 h) 0.121 mg/l air
Handling/storage Cautions: Store above 32°F
Suppliers and Branded Products
Basic Producers:
AgriGuard Ltd. (Brogue*, Quickfire*)
Syngenta (Aquacide*, Reglone*, Reglox*, Reward*)
Formulators' Trade Names:
Applied Biochemists (Weedtrine*-D)
B.V. Industrie- & Handelsonderneming Simonis (Wopro-diquat*)
Premix Products:
+ Glyphosate
- Razor Burn* — Nufarm Americas Inc.
- Roundup QuikPRO* — Monsanto Co.
Discontinued Names:
Actor*
Fernpath Pronto*
Weedol*
