Onion prices are again on the upswing after a brief respite. The prices are sky-high because, of their carrying costs from Nashik, Bellary or Akula. Bengal’s annual onion consumption is 8.5 lakh tonnes if weather conditions are favourable. This year, the state had a very good crop, which had so far stabilized prices. Due to the transportation and the constant rise in diesel price things are turning haywire. There has not been any shortage in supply as “The onion production has been good. But the transportation cost has gone up enough to make onion dearer in Kolkata,” said Kamal Dey, member of the market task force.