Pyrifenox Advanced Systemic Fungicide for Powdery Mildew and Scab Control

🌾 Pyrifenox – Advanced Systemic Fungicide for Powdery Mildew and Scab Control

Chemical Name: 1-(2-(4-Chlorophenyl)-1-methylethoxy)phenyl(2-pyridyl)methanol
Common Name: Pyrifenox
CAS Number: 88283-41-4
Molecular Formula: C20H20ClNO2
Mode of Action: Ergosterol biosynthesis inhibitor (EBI) – Demethylation inhibitor (DMI)
FRAC Code: 3 (Triazole-like – DMI group)
Formulation Types: Emulsifiable concentrate (EC), Suspension concentrate (SC), Wettable powder (WP)

🧪 Product Overview:

Pyrifenox is a systemic fungicide used to control a range of fungal diseases, most notably powdery mildew and apple scab. It belongs to the DMI (Demethylation Inhibitor) class of fungicides and works by inhibiting the biosynthesis of ergosterol, a vital component of fungal cell membranes.

With both preventive and curative activity, Pyrifenox offers long-lasting protection and is ideal for integration into disease resistance management programs. It is especially favored in the cultivation of grapes, apples, cucurbits, and other fruit and vegetable crops.

🌿 Key Features and Benefits:

• ✅ Highly effective against powdery mildew, apple scab, and other fungal pathogens

• ✅ Systemic and translaminar activity – protects both upper and lower leaf surfaces

• ✅ Curative and preventive disease control

• ✅ Compatible with IPM and rotational strategies

• ✅ Long-lasting residual activity with rainfastness

• ✅ Excellent crop selectivity and safety profile

🌱 Target Crops:

• 🍇 Grapes

• 🍏 Apples

• 🍑 Stone fruits (peach, plum)

• 🥒 Cucurbits (melon, cucumber, zucchini)

• 🌹 Ornamentals

• 🍓 Strawberries

• 🥬 Vegetables (e.g., eggplants, peppers)

🦠 Target Diseases:

• Powdery Mildew (Erysiphe spp., Oidium spp., Uncinula necator)

• Apple Scab (Venturia inaequalis)

• Leaf Spot Diseases

• Rusts (in some crops)

• Black rot, downy mildew (as part of tank mixes)

🔬 Mode of Action:

Pyrifenox inhibits C14-demethylase, an enzyme critical for ergosterol production in fungal membranes. Without ergosterol, the fungal cells lose integrity, stopping:

• Hyphal growth

• Spore germination

• Sporulation

Its systemic and translaminar movement ensures protection beyond the point of contact, allowing it to suppress latent infections and stop disease spread.

📋 Application Recommendations:

• Application Method: Foliar spray

• Water volume: Ensure thorough crop coverage

• Timing: Begin at disease onset or as a preventive measure

⚠️ Safety and Handling:

• Toxicity Profile: Low toxicity to mammals, bees, and beneficial insects

• Protective Equipment: Use gloves and mask during mixing and spraying

• Re-entry Interval (REI): Typically 12 hours

• Pre-harvest Interval (PHI): Varies by crop (e.g., 14 days for grapes)

• Storage: Store in cool, dry conditions away from direct sunlight and moisture

🔁 Resistance Management:

• Classified under FRAC Group 3

• Alternate with fungicides from different FRAC groups (e.g., QoI, SDHI, contact fungicides)

• Avoid repeated applications in one season to delay resistance buildup

📦 Packaging and Availability:

• Commonly available in 100 ml, 250 ml, 500 ml, 1 L, and 5 L containers

• Shelf life: 2–3 years when stored under recommended conditions

✅ Conclusion:

Pyrifenox is a high-performance fungicide offering broad-spectrum protection against key fungal diseases in fruits, vegetables, and ornamentals. Its systemic and curative properties make it a valuable addition to any disease management program, helping ensure healthy crops, higher yields, and better quality produce.

🌿 Pyrifenox – Reliable Defense, Exceptional Control.

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