Petrol and diesel prices started rising soon after the last phase of the general election concluded, and have increased by 70-80 paisa per litre in the past nine days. Prices have been on the rise since May 20, a day after the final phase of polling for the Lok Sabha elections ended. The price of petrol has risen by 83 paise per litre in the nine days and diesel by 73 paise, according to price notifications of state-owned oil companies.