Traditional Chawl vs Modern Scientific Onion Storage
Rabi onions harvested in April-May must sustain domestic supply through November. Traditional storage leads to catastrophic post-harvest losses, causing severe price volatility in Indian markets.
| Feature | Traditional Bamboo Chawl | Engineered Multi-Module Storage | Farmer Advantage |
|---|---|---|---|
| Storage Losses (4-5 months) | 30% - 40% loss | 6% - 10% loss | Saves 25-30 tonnes per 100 tonnes |
| Ventilation Mechanism | Passive natural draft | Forced bottom-draft automated fans | Prevents heat buildup in center |
| Storage Lifespan | 2 to 3 months maximum | 5 to 6 months without sprouting | Enables selling in peak festival season |
| Subsidy Support | Minimal state assistance | 50% under MIDH (up to ₹87,500/unit) | 50-tonne modular units subsidized |
Key Storage Protocol to Prevent Sprouting & Black Mold
Pre-Harvest Curing: Spray Maleic Hydrazide (MH @ 2500 ppm) 15-20 days before harvest when 50% tops have fallen to arrest bulb dormancy breakdown.
Field Curing & Neck Cutting: Cure bulbs under shade for 10-12 days; leave 2.5 cm neck above bulb to seal vascular tissues against Aspergillus niger spores.
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