Potassium phosphonate (40% SL) is a systemic fungicide + plant defense activator widely used in horticulture and plantation crops.
It is mainly used to control oomycete diseases and to improve plant resistance.
🛡 1️⃣ Control of Oomycete Diseases
Very effective against:
Phytophthora (root rot, foot rot)
Pythium (damping-off)
Downy mildew
Collar rot diseases
Especially useful in:
Cardamom
Black pepper
Arecanut
Vegetables
Citrus
In high rainfall areas like Idukki, this is very important for root disease control.
🌱 2️⃣ Systemic Action (Upward & Downward Movement)
Moves inside plant through xylem and phloem
Protects roots, stem, and leaves
Works as both preventive and curative (early stage)
🧬 3️⃣ Induces Plant Immunity
Potassium phosphonate:
Activates plant defense enzymes
Increases natural resistance
Strengthens cell walls
It is not just a fungicide, but also a defense stimulator.
🌾 4️⃣ Root Health Improvement
Controls root rot
Promotes healthy root growth
Improves nutrient uptake indirectly
🍊 5️⃣ Fruit Crop Benefits
In crops like:
Grapes
Citrus
Vegetables
It reduces:
Downy mildew
Fruit rot
Leaf blight
💧 Recommended Dose (40% SL)
Foliar Spray
2–3 ml per liter of water
Soil Drench
3–5 ml per liter
Interval
15–20 days depending on disease pressure
⚠ Avoid mixing with strong alkaline products.
⚠ Always do compatibility test before tank mixing.