An econometric analysis by TNAU's Agri Marketing Intelligence and Business Promotion Centre in the Dindigul market on prices during the last 15 years revealed that they would rule around Rs 2,300 to Rs 2,500 per quintal at farm level during June.
The expected export demand will also keep the prices higher, which would be more than the cost of storage and loss, including interest charges, it said.
Hence, farmers could store and sell onion to get higher returns, it added.
Onion is grown in 0.38 lakh hectares in Tamil Nadu, with production standing at 4.29 lakh tonnes in 2012-13.
This was 1.61 per cent higher in area and 22.8 per cent lesser in production compared to last year, which stood at 0.37 lakh hectares and 5.56 lakh tonnes, it said.