New Delhi: Food inflation jumped to 9.13 percent for the week ended September 17 from 8.84 percent in the previous week, mainly due to a rise in prices of potatoes, pulses and poultry.

Finance Minister Pranab Mukherjee termed the rise in food inflation as an area of "grave concern".

While prices of onions eased marginally during the week, gram, masoor, arhar, urad and poultry rates firmed up on an annual basis, as per Wholesale Price Index (WPI) data released by the government on Thursday.

Potato prices, too, firmed up by about 15 percent on an annual basis.

However, as a whole, inflation in the fruit and vegetable segments eased during the week under review vis-a-vis the same period last year.

In the week ended September 10, food inflation had declined to 8.84 percent from 9.47 percent in the previous week.

"These fluctuations are taking place and it is one of the areas of grave concern," Mukherjee told reporters, adding, "(Food inflation) is perilously close to double digits."

As per the WPI data, inflation in cereals, milk, eggs, meat and fish also eased to 13.17 percent during the week under review.

Overall, inflation in primary articles stood at 11.43 percent for the week ending September 17, compared to 12.17 percent in the previous week. Primary articles constitute over 20 percent of the WPI basket.

Non-food articles, which include fibres, oil seeds and minerals, recorded 12.89 percent inflation during the week ended September 17, down from 17.42 percent in the previous week.

Meanwhile, inflation in the fuel and power segment went up to 14.69 percent during the week ended September 17 from 13.96 percent in the previous seven-day period.

Headline inflation, which factors in manufactured items, fuels and non-food primary items, in addition to food commodities, stood at a 13-month high of 9.78 percent in August.

The Reserve Bank has already hiked policy rates 12 times since March, 2010, to tame demand and curb inflation.