What Is Thiophanate Methyl and Why It's a Go-To Fungicide in Modern Agriculture

What Is Thiophanate Methyl?

Thiophanate Methyl is a broad-spectrum systemic fungicide widely used in agriculture and horticulture. It belongs to the benzimidazole class and works by inhibiting fungal cell division. Upon application, it is absorbed and transported within the plant, providing both preventive and curative protection.

Chemical Composition

• Chemical Name: Dimethyl 4,4′-O-phenylenebis(3-thioallophanate)

• Molecular Formula: C12H14N4O4S2

• CAS Number: 23564-05-8

• Form: White to off-white powder, commonly used in 70% WP or 500g/L SC formulations

Key Features

• Systemic action: Effective both internally and on the surface of plants

• Wide coverage: Controls Botrytis, Fusarium, Alternaria, Sclerotinia, and more

• Versatile use: Approved for vegetables, fruits, turf, ornamental plants, and cereals

• Preventive and curative: Can stop fungal infection at multiple stages

Applications

JIN DUN CHEMICAL is a reliable Thiophanate Methyl manufacturer, offering stable quality and flexible formulations for global B2B customers. Our products meet FAO and domestic agricultural standards.

Advantages and Limitations

Advantages:

• Long-lasting protection through systemic action

• Effective against a broad range of fungi

• Compatible with many other pesticides

Limitations:

• Risk of resistance development with prolonged use

• Not effective against downy mildew

• Re-entry interval and pre-harvest interval must be strictly observed

FAQs

Q1: Can Thiophanate Methyl be mixed with other fungicides?
Yes, it is often tank-mixed with contact fungicides to broaden the spectrum and delay resistance.

Q2: Is it safe for bees or aquatic life?
It poses low acute toxicity to bees but may affect aquatic organisms; avoid spray drift into water bodies.

Q3: How often should it be applied?
Application frequency depends on crop type and disease pressure—generally every 7–14 days.

Q4: Is it suitable for organic farming?
No, Thiophanate Methyl is a synthetic fungicide and not approved for organic certification.

Q5: What's the re-entry interval after spraying?
Typically 12–24 hours; always follow the label for local regulations.