What is the new method to reduce onion post-harvest loss?
India’s premier nuclear research center, Bhabha Atomic Research Centre (BARC), is using gamma rays to reduce post-harvest loss in onions, potentially cutting the loss rate from the usual 25-30% to 8.8%.
How does gamma irradiation work to preserve onions?
Gamma irradiation with cobalt-60 isotopes extends the shelf life of onions by slowing down the natural decomposition processes without harming the quality of the onions.
What are the benefits of using gamma rays for onion storage?
The treatment improves storage life, reduces the loss due to rotting, and maintains the quality of the onions for up to five months.
Has this method been tested?
Yes, last year the Krishi Upaj Mandi in Ujjain, Madhya Pradesh, irradiated around 1,274 tonnes of onions with successful results.
Is gamma irradiation economically viable?
While the process incurs costs, it is considered economically viable given the significant reduction in post-harvest losses, making it a worthwhile investment for the agriculture industry.
What is the cost of irradiating onions?
The cost of irradiating and storing onions is about ₹7-18 per kg, which is offset by the reduction in loss and the potential increase in the available marketable quantity of onions.
Are there any health concerns associated with gamma irradiation of food?
No, gamma irradiation is a safe food preservation method and does not make the food radioactive. It is approved by food safety authorities worldwide.
Can the irradiation process be applied to other crops?
Yes, gamma irradiation is a versatile technology that can be used for various crops to extend shelf life and reduce post-harvest losses.
What is the expected impact on the onion supply chain?
The adoption of gamma irradiation could stabilize onion prices by ensuring a more consistent supply and reducing the need for emergency market interventions due to crop losses.
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