Indian labourers unload onions for sorting at Mundera wholesale market in Allahabad on September 9, 2015.  The cost of India's staple vegetable -- an essential ingredient in curries and eaten daily by almost everyone -- soared in August to an eyewatering 60 rupees (90 US cents) a kilo on wholesale markets, up from 25 rupees in June.   AFP PHOTO/ SANJAY KANOJIA        (Photo credit should read Sanjay Kanojia/AFP via Getty Images)