Rainbow Fungicide (Boscalid 25.2% + Pyraclostrobin 12.8% WG)
The "Double-Lock" Expert for Premium Disease Control & Higher Yields.
Rainbow is a world-class, broad-spectrum fungicide brought to you by Nichino India. It combines two powerful active ingredients—Boscalid and Pyraclostrobin—to offer complete protection against the toughest fungal diseases in Grapes, Apples, and Vegetables. Beyond just killing fungus, Rainbow provides a "Greening Effect" (AgCelence), keeping leaves healthier for longer to boost fruit quality and size.
Why Choose This Product? Key Benefits
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Curative & Preventive Action: Stops existing infections immediately while forming a protective shield against new spores.
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Broad Spectrum Control: One solution for multiple problems. Effectively controls Downy Mildew, Powdery Mildew, Botrytis, and Alternaria simultaneously.
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Long-Lasting Protection: Provides extended safety for 10 to 14 days, reducing the need for frequent spraying.
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Excellent Rainfastness: Absorbs quickly into the leaf. It becomes rain-safe within 2 hours of application.
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Plant Health Benefits (Greening): Delays leaf aging and improves nitrogen absorption, resulting in greener leaves and shiny, high-quality fruits.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Rainbow |
| Technical Name | Boscalid 25.2% + Pyraclostrobin 12.8% WG |
| IRAC MoA Code | Group 7 (SDHI) + Group 11 (QoI) |
| Chemical Group | Carboxamide + Strobilurin |
| Formulation | WG (Water Dispersible Granules) |
| Toxicity Label | Blue/Green (Slightly Toxic) |
How It Works: Mode of Action
- Double Energy Blockade: Pyraclostrobin blocks the fungus's energy supply at "Complex III" (Preventive), while Boscalid blocks it at "Complex II" (Curative). The fungus runs out of energy and dies.
- Spore Germination Stop: It acts on the leaf surface to stop fungal spores from germinating, preventing the disease from entering the plant.
- Stress Tolerance: It reduces ethylene production in the plant (the stress hormone), keeping the crop green and productive even during heat or drought stress.
This dual-action mechanism makes it very difficult for fungus to develop resistance.
Target Crops & Pests
| Crop | Target Pest(s) |
|---|---|
| Grapes | Downy Mildew, Powdery Mildew, Botrytis (Grey Mold) |
| Apple | Powdery Mildew, Scab, Alternaria Leaf Blotch |
| Vegetables (Onion, Tomato, Chilli) | Purple Blotch, Early Blight, Powdery Mildew |
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) |
|---|---|---|---|---|
| Grapes | 240 g | 200 - 400 L | 0.6 - 1.2 g | 34 Days |
| Apple | 300 g | 400 L | 0.75 g | 41 Days |
| Onion / Tomato / Chilli | 240 g | 200 L | 1.2 g | 10 - 24 Days |
*PHI = Pre-Harvest Interval: The minimum number of days to wait between the last spray and harvesting. Note that Onion PHI is 24 days, while Tomato/Chilli is only 10 days.
How to Apply: Best Practices
- Timing: For Grapes, apply during "Pre-bloom" and "Fruit Setting" stages. For Vegetables, apply at the first sign of disease or during flowering.
- Mixing: Rainbow is a WG (Granule) formulation. Pre-dissolve the required quantity in a small bucket of water before adding it to the main tank.
- Coverage: Ensure thorough coverage of the canopy. For onions, use a silicone-based sticker as the leaves are waxy and vertical.
- Safety: Always wear PPE (gloves, mask, goggles). Wash hands thoroughly after use. Avoid spraying near fish ponds as it is toxic to aquatic life.
Frequently Asked Questions
1. What is the main use of Rainbow Fungicide?
It is primarily used to control Downy Mildew and Powdery Mildew together in one spray, along with Botrytis and Alternaria blights in fruit and vegetable crops.
2. Does Rainbow help in increasing yield?
Yes. The Pyraclostrobin in Rainbow provides a "Greening Effect" by reducing plant stress and improving nitrogen uptake, which leads to better quality produce and potentially higher yields.
3. Is Rainbow a curative or preventive fungicide?
It is both. The Boscalid component cures existing fungal growth inside the leaf, while Pyraclostrobin prevents new spores from germinating on the surface.
4. Can I use Rainbow during harvest time?
Check the PHI carefully. For Grapes (34 days) and Apple (41 days), do not use it near harvest. However, for Tomato and Chilli, it has a short PHI of 10 days, making it safer for vegetable picking cycles.
5. Is Rainbow safe for bees?
It is considered relatively safe for bees compared to older chemicals, but it is best practice to spray during early morning or late evening when bee activity is low.
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.
