Krishikranti Ampelomyces Quisqualis 2% WP is a specialist bio fungicide for powdery mildew control. It is the world's only friendly fungus that eats powdery mildew from inside. Best for grapes, mango, cucumber, pumpkin, bitter gourd, apple, chilli, rose, strawberry, pea, and tomato. Sprayable on leaves and fruits. Zero residue. Safe for organic farming and export crops.
TypeBio Fungicide (Friendly Fungus)
FormPowder (Wettable)
StopsPowdery Mildew Only
How to UseSpray on Leaves & Fruits
SafetyZero residue, Organic safe
Best UsePreventive + Early Disease
What is Powdery Mildew?
Powdery mildew is a white powder-like fungus that grows on plant leaves, stems, flowers, and fruits. It makes leaves look like they are covered with white flour. The white powder slowly turns yellow, then brown. Plants stop growing properly. Fruits stop developing. Yield drops badly.
It is a big problem in grapes, cucumber, pumpkin, bitter gourd, mango, apple, chilli, strawberry, pea, rose, and tomato. Especially during humid weather, cloudy days, and morning dew.
Why Ampelomyces Quisqualis Works So Well
Ampelomyces quisqualis is a special friendly fungus. It does only one job but it does it better than any other biological. It enters inside the powdery mildew fungus and eats it from inside. The white powder slowly disappears. Powdery mildew cannot grow new spores. Plant gets clean and healthy again.
This is called hyperparasitism one fungus killing another fungus. It works on all types of powdery mildew (Erysiphe, Sphaerotheca, Podosphaera, Uncinula, Leveillula, Oidium).
Important Be Honest: Ampelomyces quisqualis stops
only powdery mildew. It does NOT control downy mildew, blight, anthracnose, leaf spot, or wilt. For those, use other bio fungicides like
Pseudomonas fluorescens or
Trichoderma viride.
Crops Where Powdery Mildew is a Big Problem
Use Ampelomyces quisqualis on these crops to stop powdery mildew naturally:
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Powdery mildew in grapes The biggest use. Stops white powder on leaves, stems, and bunches
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Powdery mildew in cucumber, pumpkin, bottle gourd, bitter gourd, ridge gourd White spots on cucurbit leaves
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Powdery mildew in mango : Especially during flowering and fruit set
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Powdery mildew in apple : White growth on shoots and leaves
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Powdery mildew in chilli : White-yellow spots on leaves
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Powdery mildew in pea : Common in cold-season pea
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Powdery mildew in strawberry : White growth on leaves and fruits
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Powdery mildew in tomato : White patches on leaves
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Powdery mildew in rose : White growth on buds and leaves
- Powdery mildew in mulberry, okra (bhendi), beans, coriander, cumin
Browse the related collections: Bio Fungicides, Organic Fungicides, Fungicide for Grapes, Fungicide for Mango, Fungicide for Cucumber.
Dose & How to Use (Common for All Crops)
Same simple dose works for all crops. Only the spray volume changes based on plant size.
| Crop Type |
Dose |
Spray Schedule |
| Grapes |
3–5 g per litre water
(750–1000 g per acre) |
Every 7–10 days from flowering till harvest |
| Mango |
4–5 g per litre water |
Start at flowering. Repeat after 10 days |
| Cucumber, Pumpkin, Bottle Gourd, Bitter Gourd |
2.5–3 g per litre water
(500–750 g per acre) |
Every 7–10 days during humid weather |
| Apple |
3–5 g per litre water |
Every 10–14 days from bud break |
| Chilli |
3–4 g per litre water |
Every 10 days during disease season |
| Pea |
2.5–3 g per litre water |
Start at flowering. Repeat after 10 days |
| Strawberry |
2.5–3 g per litre water |
Every 7–10 days |
| Tomato |
3 g per litre water |
Every 10 days during humid weather |
| Rose & Ornamentals |
2–3 g per litre water |
Every 7–10 days |
Quick Dose Reference: Common Spray: 2.5–5 g per litre water • Per Acre: 500–1000 g • Repeat: Every 7–10 days during disease season • Spray Time: Early morning or late evening
How to Spray Step by Step
- Mix the powder slowly in a small amount of water. Stir well to break lumps
- Add this paste to the main spray tank. Stir again
- Spray on full plant both upper and lower side of leaves
- Cover stems, flower buds, and fruits also
- Spray in early morning or late evening never in hot sunlight
- Repeat every 7 to 10 days during cloudy or humid weather
- Use within 4 hours of mixing fresh mix gives best result
Important Tip Humidity Matters: Ampelomyces quisqualis works best when air humidity is above 60–70%. That is exactly when powdery mildew also spreads fast. So spray during cloudy, humid, or post-rain days. Do not spray on dry, hot, sunny afternoons the friendly fungus will not survive.
When to Use
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Preventive (best result): Start spraying 7 to 10 days before powdery mildew comes based on weather and your past field experience
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Early stage: When you see first 2–3 white spots on leaves
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Flowering stage: Very important for grapes, mango, pea, and roses
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Cloudy and humid weather: Most powdery mildew outbreaks happen here
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For resistance management: Use between sulphur or chemical sprays to slow down resistance
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Before harvest: Safe to spray right up to harvest day no waiting time
How Does It Work?
Ampelomyces quisqualis is a hyperparasite a fungus that eats other fungi. It works in 4 simple steps:
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Step 1: The friendly fungus spores fall on powdery mildew patches
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Step 2: They grow tiny tubes that enter the powdery mildew threads (mycelium)
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Step 3: They eat the powdery mildew from inside using its nutrients to grow
-
Step 4: Powdery mildew dies. New spores cannot form. Disease stops spreading
It is slower than chemical sprays in the first few days. But once it starts working, the disease does not come back fast because the friendly fungus stays on the plant and keeps killing new powdery mildew that tries to grow.
Do Not Mix With: Sulphur sprays (like wettable sulphur), copper fungicides, or strong chemical fungicides they will kill the friendly fungus. Keep 10–14 days gap between Ampelomyces quisqualis and any sulphur or chemical fungicide spray. Safe to mix with neem oil and biofertilizers.
Why Grape, Cucurbit & Mango Farmers Choose This
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Best biological for powdery mildew: No other bio fungicide is as specialist or as strong against powdery mildew
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Zero residue: Safe for export-grade grapes, mango, and vegetables. No waiting time before harvest
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No resistance build-up: Powdery mildew has become resistant to many chemicals. This biological does not have that problem
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Saves chemical sprays: Use this between chemical sprays. Chemical use drops by 30–50%
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Stays active for long: Once it grows on the plant, it keeps working for many days
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Works in humid weather: Exactly when chemical fungicides wash off, this biological works best
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Organic farming approved: Use without breaking organic rules. Safe for export to Europe and USA markets
Frequently Asked Questions
Q. What is Ampelomyces quisqualis used for? Ampelomyces quisqualis is a specialist bio fungicide. It is used only for powdery mildew control in grapes, mango, cucumber, pumpkin, bitter gourd, apple, chilli, strawberry, pea, rose, and tomato. It does not control any other disease.
Q. What is the dose of Ampelomyces quisqualis per acre? Common dose is 2.5 to 5 grams per litre of water. Per acre, use 500 to 1000 grams depending on the crop and spray volume. For grapes and mango, use the higher rate. For cucurbits and pea, use the lower rate.
Q. How to control powdery mildew in grapes naturally? Spray Ampelomyces quisqualis at 3 to 5 grams per litre of water every 7 to 10 days from flowering till harvest. Start before powdery mildew appears. Spray in early morning or late evening. Use along with neem oil for stronger result.
Q. How to stop powdery mildew in cucumber and pumpkin? Spray 2.5 to 3 grams per litre of water at first sign of white spots. Repeat every 7 to 10 days during humid weather. Cover both upper and lower side of leaves.
Q. Can Ampelomyces quisqualis control downy mildew or blight? No. It only stops powdery mildew (white powder type). For downy mildew, use Pseudomonas fluorescens. For blight or root rot, use Trichoderma viride.
Q. Can it be mixed with sulphur or chemical fungicides? No. Sulphur and chemical fungicides kill the friendly fungus. Keep 10 to 14 days gap before or after any sulphur or chemical fungicide spray.
Q. Is Ampelomyces quisqualis safe for grapes and export crops? Yes. It is residue-free with zero waiting time before harvest. Approved for organic and export-grade grapes, mango, and vegetables.
Q. When is the best time to spray? Spray in early morning or late evening when humidity is high (above 60%). Do not spray in hot sun. Cloudy, humid, or post-rain days give the best result.
Q. How fast does it work? It is slower than chemical fungicides in the first 5 to 7 days. But once it starts working, control lasts longer because the friendly fungus stays alive on the plant and keeps killing new powdery mildew.
Q. Can it be used in organic and natural farming? Yes. It is approved for organic and natural farming systems. Safe for plants, animals, soil, and people. Zero chemical residue.
Q. What is the difference between Ampelomyces quisqualis and sulphur for powdery mildew? Sulphur kills powdery mildew by chemical action but leaves residue and can damage plants in hot weather. Ampelomyces quisqualis kills it biologically with no residue and no leaf damage. Best practice use both in rotation for full control.
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