
CAPTAF FUNGICIDE
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Captaf Fungicide Rallis: Complete Guide to Uses, Dosage & Price
Protect your high-value crops with Captaf (Captan 50% WP), the trusted broad-spectrum contact fungicide by Rallis India.
Fungal diseases like Apple Scab, Downy Mildew, and Blights can devastate your harvest overnight. Captaf Fungicide is a powerful, multi-site contact fungicide that creates a protective shield on your plants. Unlike many modern chemicals, fungi rarely develop resistance to Captaf, making it an essential partner for long-term disease management in fruits, vegetables, and ornamental crops.
Why Choose This Product? Key Benefits
- ⏱️Kick-Back Action: Stops active infections if applied within 18 to 24 hours of the disease starting.
- ?️Resistance Management: Its multi-site action prevents fungi from adapting, making it the perfect tank-mix partner.
- ⏳Excellent Protection: Acts as a strong preventative barrier, killing fungal spores before they can penetrate the leaf.
- ?️Rainfastness: Becomes effective and resistant to wash-off once the spray deposit has dried (approx. 2 hours).
- ?Superior Fruit Finish: Gentle on skin; does not cause "russeting" or roughness on Apples and Grapes like Copper sprays do.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Captaf (Rallis India Ltd) |
| Technical Name | Captan 50% WP |
| IRAC MoA Code | M04 (Multi-Site Contact) |
| Chemical Group | Phthalimide |
| Formulation | Wettable Powder (WP) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Captaf acts as a general toxicant to fungi, making it incredibly difficult for diseases to survive.
- Respiratory Shutdown: It penetrates fungal cells and disrupts the mitochondrial energy production (Krebs cycle).
- Inhibits Germination: It kills spores immediately upon contact, preventing them from growing a germ tube.
- Cell Division Blocker: It halts the division of cells, effectively stopping the spread of the fungus.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Apple | Scab, Brown Rot, Flyspeck |
| Grape | Downy Mildew [Image of Downy Mildew on Grapes] |
| Potato & Tomato | Early Blight & Late Blight |
| Chilli | Fruit Rot (Anthracnose), Damping-off |
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 (ml / Acre) | Water (L / Acre) | Dose (g / Litre) | PHI (Days) |
|---|---|---|---|---|
| Apple / Grape | 1000 g | 300 - 400 L | 2.5 g | Check Label |
| Potato / Tomato | 1000 g | 300 - 400 L | 2.5 - 3.0 g | Check Label |
| Chilli / Cotton | 600 - 800 g | 200 L | 3.0 g | Check Label |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Always check the packet label for the exact days.
How to Apply: Best Practices
- Timing: Use preventatively or at the very first sign of disease. For apples, apply from Green Tip to Petal Fall stages.
- Mixing: Do not dump powder directly into the tank. Mix it with a little water in a bucket first to make a smooth "slurry" paste, then add to the tank.
- Coverage: Ensure full coverage of leaves and fruit. Use fine-to-medium droplets.
- Safety: Always wear PPE (gloves, mask, goggles). WARNING: This product is a severe eye irritant. Protect your eyes. Wash hands thoroughly after use.
Frequently Asked Questions
1. Is Captaf a systemic fungicide?
No, Captaf is a contact fungicide. It stays on the surface of the plant and kills fungi on contact. It does not travel inside the plant system.
2. Can I mix Captaf with agricultural oils or alkaline products?
No. Never mix Captaf with Bordeaux Mixture, Lime Sulfur, or oils. Alkaline products destroy the chemical, and oils can cause the fungicide to burn your crop (phytotoxicity).
3. Can I use this for seed treatment?
Yes, Captaf is excellent for seed treatment to prevent soil-borne diseases like damping-off. Use 2-3 grams per kg of seed.
4. Is it safe for honeybees?
It is relatively non-toxic to bees compared to insecticides, but you should avoid spraying during active foraging hours to prevent physical contamination.
5. What should I do if the powder gets in my eyes?
Flush eyes with water immediately for 15-20 minutes holding eyelids open and seek medical attention instantly. This product is a severe eye irritant.
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.


