Sanjay Jog / Mumbai January 05, 2010, 0:57 IST The central government, which has stepped up efforts for the blending of ethanol in a 5 per cent proportion with petrol, has threatened to blacklist ethanol manufacturers if they fail to supply the commodity to oil marketing companies (OMCs). Food and Agriculture Minister Sharad Pawar has asked the ethanol producers not to dilly-dally over the supply and soon enter into an arrangement with the OMCs at Rs 27 per litre (at ex-mill rates). OMCs have offered to keep the ethanol price stable at Rs 27 per litre for three years. However, this rate does not include excise duty, transportation cost and other expenses. The zone-wise price of ethanol will differ after adding all these costs. Pawar