Pyraflufen-ethyl

Action/Use:

Defoliant/Desiccant
;
Herbicide

Use: A fast-acting contact herbicide for broadleaf weeds in cereal grains, corn, cotton, legumes, oil seeds, potatoes, soybeans, sugarcane, triticale, vegetables, wheat; also a desiccant for potatoes and defoliant for cotton (ET*); noncrop weed control, industrial vegetation management, range and pasture (Edict*); nonselective broadleaf weed control for tree, nut and vine crops (Venue*); weed control in wheat, corn, soybeans (Vida*); broadleaf weed control in nurseries and ornamental plantings, sodfarms, Christmas trees, established ornamental turf (Octane*); controls broadleaf weeds and susceptible woody plants (Pyresta*).

Identification

Common Name(s): Pyraflufen-ethyl (BSI, ISOPA)

Chemistry

Formula: C₁₅H₁₃CI₂F₃N₂O₄.

Properties: Pale brown, crystalline. Melting point 126�-127�C. Solubility at 25�C: acetone 167 g/l, methanol 7.39 g/l, ethyl acetate 105 g/l, xylene 41.7 g/l.

Mode of Action / Resistance Management

Chemical Group: Phenylprazole

Mode of Action: Inhibition of protoporphyrinogen oxidase (PPO)

Action Group: HRAC Group E; WSSA Group 14

Registration

Outside U.S.A.: Quickdown* in Europe.

Environmental Guidelines

Hazards: Fish: LC₅₀ (48 h) >10 (carp), >0.1 (rainbow trout) ppm. Bird: Oral LD₅₀ >2000 mg/kg (bobwhite quail). Dietary LC₅₀ >5000 mg/kg (bobwhite quail, mallard duck). Bee: LD₅₀ (Oral) >111 �g/bee; (Contact) >100 �g/bee

Water Solubility: 82 ppb

Safety Guidelines

Toxicity: (Rat): Oral LD₅₀ 3712 mg/kg; Dermal LD₅₀ >2000 mg/kg. Inhalation LC₅₀ >5.53 mg/l

Handling/storage Cautions: Store in a cool place

Suppliers and Branded Products

Basic Producers:

Nichino America, Inc. (Edict*, ET*, Venue*)

Formulators' Trade Names:

Gowan Company (Vida*)

SePRO Corp. (Octane*)

Premix Products:

+ Bifenox