The government is also considering restricting exports by imposing minimum export price (MEP) to boost local supply and keep prices stable, sources said.
Retail onion prices in the national capital have risen to Rs 38/kg as of today from Rs 22/kg in the year-ago period. Onion is sold at Rs 34/kg in Mumbai, Rs 40/kg in Kolkata and Rs 29/kg in Chennai, as per official data.
"To control the prices of onion, state governments have been advised to impose stock limits for onion on traders/ wholesalers," Food and Consumer Affairs Minister Ram Vilas Paswan tweeted.
Onion prices have shot up in the last few weeks due to depleting old stocks and concerns about this year's output as kharif sowing area is down by 20-30 per cent.
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Recently, Paswan had also written to the Commerce Ministry seeking imposition of MEP of USD 450 per tonne on onion to curb outbound shipments and withdrawal of incentives given to traders for its export.
The issue was discussed at the recent meeting of the Committee of Secretaries, which too favoured imposition of MEP. A final decision is expected to be taken soon, sources said.
Last fiscal, India exported 34.92 lakh tonnes of onion.
Onion stock of 2016-17 is being consumed currently. The new kharif crop is expected to arrive in full swing from next month.