Costlier onion and other vegetables pushed up inflation for the third month in a row to 6.1 per cent in August. The inflation was at 5.79 per cent in July and 8.01 per cent in August, 2012. The highest increase was witnessed in case of onion which reported an increase of 245 per cent year on year. The price of vegetables in general rose by 77.81 per cent. The high increase in prices was also seen in other essential food items like rice, cereals, egg, meat and fish.On the positive side, potato prices declined by about 15 per cent followed by pulses which became cheaper by 14 per cent as compared to August last year. The food items became costlier by 18.8 per cent on year on year basis. In case of manufactured items, sugar became cheaper by 4.2 per cent while edible oils became cheaper 3.86 per cent.Overall, manufactured items showed a moderate increase of 1.9 per cent during the month on annual basis.Commenting on the rising inflation, Prime Minister's Economic Advisory Council chairman C Rangarajan said that it is mainly on account of depreciating rupee but hoped it will come down in the coming months.