Pyrifenox
Action/Use:
- Fungicide
Use:
For control of blossom blight, powdery mildew, scab, and leaf spot diseases of pome and stone fruit, soft fruit, grapes, vegetables, peanuts, and sugar beets.
Identification
Common Name(s): Pyrifenox (ANSI, ISO, BSI)
Chemistry
Class: Pyridines.
Formula: C14H12CI2N2O.
Properties: Tech: Tan-colored, slightly viscous liquid. Boiling point >150°C at 0.1 mm Hg, density 1.28 g/ml at 20°C, vapor pressure 1.9 mPa at 25°C. Solubility: n-hexane 210 g/l; completely miscible with acetone, ethanol, n-octanol, toluene.
Mode of Action / Resistance Management
Chemical Group: pyridines
Taget Site: G1: C14-demethylase in sterol biosynthesis
Mode of Action: sterol biosynthesis in membranes
Action Group: FRAC Code 3
Comments / Risk Notes: Medium risk
Registration
U.S.A.: Not registered.
Environmental Guidelines
Hazards: Fish: LC50 (96 h) 7.1 mg/l (rainbow trout); 6.6 mg/l (bluegill sunfish). Daphnia: EC50 (48 h) 3.6 mg/l. Bird: Oral LD50 (14 day) >2000 mg/kg (mallard duck, bobwhite quail). Bee: Oral LD50 (48 h) 59 µg/bee (oral); 70 µg/bee (contact)
Water Solubility: At 25°C: 150 mg/l (pH 6.7), 130 mg/l (pH 9)
Safety Guidelines
Signal Word: CAUTION
Toxicity Class: III
Toxicity: Tech (Rat): Oral LD50 2900 mg/kg; Dermal LD50 >5000 mg/kg; Inhalation LC50 (4 h) 2048 mg/m3 air. (Rabbit): Nonirritant to eyes. Slight irritant to human skin
Handling/storage: Avoid skin contact and vapor inhalation
Protective Clothing: Long-sleeved shirt and long pants. Waterproof gloves. Protective eyewear.
Suppliers and Branded Products
Discontinued Names:
Boxer*
Corado*
Furado*
Rondo M*
