Prism Fungicide (Thiophanate Methyl 70% WP)
The "Green" Systemic Specialist for Complete Disease Protection.
Prism (by Insecticides India Ltd) is a broad-spectrum systemic fungicide that protects your crops from the inside out. It is highly effective against stubborn fungal diseases like Anthracnose, Scab, and Powdery Mildew.
Best For: Papaya, Apple, Grapes, Bottle Gourd, and Tomatoes.
Why Choose This Product? Key Benefits
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Dual Action Power: Acts as both a curative (stops existing infection) and a protectant (prevents new attacks).
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Systemic Armor: Absorbed by roots and leaves, it travels inside the plant to protect new growth that wasn't even sprayed.
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Long-Lasting Defense: Releases the active ingredient slowly, reducing the need for frequent re-spraying.
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Rainfast in 2-4 Hours: Quick absorption ensures your investment isn't washed away by sudden showers.
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Phytotonic "Green" Effect: Boosts crop health by supplying available Sulfur and Nitrogen, making leaves greener and stronger.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Prism (Insecticides India Ltd.) |
| Technical Name | Thiophanate Methyl 70% WP |
| IRAC MoA Code | Group 1 (Benzimidazoles) |
| Chemical Group | Thiourea / Benzimidazole Precursor |
| Formulation | WP (Wettable Powder) |
| Toxicity Label | Green/Blue Triangle (Slightly to Moderately Toxic) |
How It Works: Mode of Action
Prism works as a "Pro-Drug." Once applied, it enters the plant and converts into Carbendazim (MBC), the active fungus-killer.
- Absorption: The powder solution is absorbed by leaves or roots and travels upward through the plant's vascular system (Xylem).
- Inhibition: It binds to the fungus's tubulin protein, stopping cell division (Mitosis).
- Eradication: Without cell division, the fungal growth tube cannot expand, and the disease dies out.
Note: Because it moves upward, it is excellent for protecting new shoots that emerge after spraying.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Papaya | Anthracnose, Powdery Mildew |
| Apple | Apple Scab, Powdery Mildew |
| Bottle Gourd / Cucurbits | Anthracnose, Fruit Rot |
| Grapes | Powdery Mildew, Rust, Anthracnose |
Dosage & Application Guide
The Golden Rule: Always follow the "Dose per Acre" for accurate results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop | Dose (g / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Papaya | 250 g | 150 - 200 L | 1.25 - 1.5 g | 4 - 5 Days |
| Apple | 250 g | As per tree size | ~1 g | 3 Days |
| Bottle Gourd | 250 g | 150 - 200 L | 1.25 - 1.5 g | 1 Day |
| Grapes | 250 g | 150 - 200 L | 1.25 - 1.5 g | 14 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting.
How to Apply: Best Practices
- Timing: Apply as a preventive measure (before disease starts) or at the very first sign of disease. Avoid spraying if rain is expected immediately.
- Mixing (Creaming): Mix the required powder with a small amount of water first to make a smooth paste (no lumps), then add it to the main tank.
- Coverage: Use a Hollow Cone nozzle for a fine mist. Ensure full coverage, but remember the systemic action will help cover missed spots.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Do not mix with alkaline products (like Bordeaux mixture) or Copper fungicides.
Frequently Asked Questions
1. Can I mix Prism with other chemicals?
It is compatible with most insecticides and growth regulators. However, DO NOT mix with Copper fungicides or Alkaline solutions (like Lime Sulfur) as they reduce efficacy.
2. Does Prism cure the disease or just prevent it?
Prism does both. It prevents spores from germinating (Protectant) and can stop the growth of fungus that has already entered the plant (Curative/Eradicant).
3. How does it make my crop look greener?
This is the "Phytotonic Effect." As Prism breaks down in the plant, it releases available Nitrogen and Sulfur, which the plant uses to boost chlorophyll and overall health.
4. Can I use it for root rot or wilt?
Yes. Prism is excellent for soil drenching (wetting the soil around roots). The roots absorb it to fight vascular diseases like Fusarium Wilt.
5. How often should I use it?
To prevent resistance, do not use Prism more than 2-3 times per season. Rotate it with fungicides from different groups (like Mancozeb or Triazoles).
Safety & Disclaimer
Always read and follow the instructions on the official product label. The information provided here is for guidance only. Use personal protective equipment (PPE) during application.
