Katyayani Azochlo Star (Azoxystrobin 4.8% + Chlorothalonil 40% SC)
The "Double-Lock" Fungicide for Watermelon, Cucumber, and Cauliflower Diseases
Katyayani Azochlo Star is a premium, dual-action fungicide designed for high-value vegetable crops. It combines the systemic power of Azoxystrobin (to clean the plant from the inside) with the protective shield of Chlorothalonil (to block fungus from the outside).
Why use this mix? Single-chemical sprays often fail because fungi develop resistance. This combo attacks the fungus in two different ways simultaneously, ensuring even resistant "super-fungi" are killed instantly. It is the gold standard for controlling Downy Mildew, Powdery Mildew, and Leaf Spots.
Why Choose This Product? Key Benefits
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Double Action: Systemic + Contact: Azoxystrobin travels inside the leaf to kill hidden infection, while Chlorothalonil stays on top to stop new spores from landing.
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Resistance Breaker: If a fungus is resistant to Strobilurins, Chlorothalonil kills it. This makes it a perfect rotation partner for your spray schedule.
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Long Duration Control: The strong bonding of Chlorothalonil to the leaf surface provides protection for 10-14 days, reducing the number of sprays needed.
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Rain-Fast: The advanced SC (Suspension Concentrate) technology sticks firmly to leaves, resisting wash-off from rain or irrigation within 2-3 hours.
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Greening Effect: Azoxystrobin boosts nitrogen absorption and reduces ethylene production, keeping leaves greener for longer and improving photosynthesis.
Technical Specifications
| Parameter | Details |
|---|---|
| Brand Name | Katyayani Azochlo Star |
| Technical Name | Azoxystrobin 4.8% + Chlorothalonil 40% SC |
| Mode of Action | Systemic (QoI Inhibitor) + Contact (Multi-Site) |
| Chemical Group | Strobilurin + Chloronitrile |
| Formulation | Suspension Concentrate (Liquid Flowable) |
| Toxicity Label | Blue Triangle (Moderately Toxic) |
How It Works: Mode of Action
Azochlo Star fights fungi on two fronts:
- Internal Energy Blockade (Azoxystrobin): It penetrates the leaf and stops the mitochondria in fungal cells from producing energy (ATP). The fungus starves and dies from the inside.
- External Barrier (Chlorothalonil): It forms a protective layer on the leaf surface. It destroys multiple enzymes in fungal spores, preventing them from germinating or entering the plant.
- Translaminar Movement: The medicine moves from the top of the leaf to the bottom, killing Downy Mildew that hides on the underside.
Result: Complete protection from spore to mycelium.
Target Crops & Pests
| Crop | Target Disease |
|---|---|
| Watermelon | Downy Mildew, Powdery Mildew, Anthracnose |
| Cucumber | Downy Mildew, Leaf Spots, Fruit Rot |
| Cauliflower | Downy Mildew, Leaf Blight (Alternaria) |
| Chili / Tomato | Early Blight, Late Blight, Fruit Rot |
Dosage & Application Guide
The Golden Rule: Start spraying preventively (before disease spreads) for best results.
Dosage per Acre, Litre, & Pre-Harvest Interval (PHI)
| Crop / Usage | Dose (per Acre) | Water (L / Acre) | Dose (ml / Litre) | PHI (Days) |
|---|---|---|---|---|
| Watermelon | 1200 ml | 200 L | 2.5 - 3 ml | 5 Days |
| Cucumber | 1200 ml | 200 L | 2.5 - 3 ml | 3 Days |
| Cauliflower | 1200 ml | 200 L | 2.5 - 3 ml | 3 Days |
| General Preventive | 600 - 800 ml | 150 L | 2 ml | - |
*PHI = Pre-Harvest Interval: You can harvest Cucumber just 3 days after spraying.
How to Apply: Best Practices
- Mixing: Shake the bottle well before use (it is a suspension). Mix with a small amount of water first to create a slurry, then add to the main tank.
- Timing: Apply at the first sign of disease spots (yellowing or white powder). Repeat every 10-14 days.
- Coverage: Use a "Hollow Cone" nozzle. Ensure the spray reaches the underside of the leaves where Downy Mildew hides.
- Safety: Do not spray near fish ponds or water bodies (toxic to fish). Always wear PPE.
Frequently Asked Questions
1. Can I use this on Apples?
NO. Azoxystrobin is phytotoxic to certain apple varieties. Avoid drift onto apple orchards.
2. Is it safe for flowers?
Yes, generally safe, but avoid spraying during peak pollination hours to protect bees. The SC formulation is safer for flowers than EC formulations.
3. Can I mix it with insecticides?
Yes, it is compatible with most insecticides like Imidacloprid or Acetamiprid. Do NOT mix with oil-based stickers or highly alkaline products.
4. Why is the dosage higher for Curative action?
To stop an active infection, you need a higher concentration to penetrate the leaf and kill established fungal colonies. Preventive doses can be lower.
5. What is the benefit over simple Mancozeb?
Mancozeb is only contact. Azochlo Star is Systemic + Contact. It cures infection inside the leaf that Mancozeb cannot reach.
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.
