globalNPOP Certifiedspray
Bordeaux Mixture
Copper sulfate + lime fungicide, in use since 1882. The oldest and still most effective organic fungicide for downy mildew, late blight, and citrus canker.
Quick Facts
Nitrogen (N)
0%
Phosphorus (P)
0%
Potassium (K)
0%
Microbial Activity
none
Cost / Acre
₹400-700
Shelf Life
Use within 24-48 hours of preparation
Application Guide
Rate: 500-700 L spray solution/ha
Frequency: Every 10-14 days during disease pressure
Ingredients
| Ingredient | Quantity | Purpose |
|---|---|---|
| Copper sulfate | 1 kg | — |
| Slaked lime | 1 kg | — |
| Water | 100 L | — |
Preparation Steps
1
Dissolve copper sulfate in 50L water (non-metal container).
2
Dissolve lime separately in 50L water.
3
Add lime solution slowly to copper solution while stirring.
4
Test pH neutral-alkaline, spray immediately — do not store.
⚠️ Important Notes
- •Copper accumulates in soil — max 6 kg copper/ha/year under NPOP
- •Toxic to earthworms in excess — do not overuse