Price rises since the conflict began have been modest, driven mainly by higher ​oil prices and cushioned by ample global cereal supplies, FAO Chief Economist Maximo Torero said ​in a statement.

But if the conflict lasts over 40 days and input costs remain ⁠high, farmers may reduce inputs, plant less, or switch crops to less intensive fertiliser crops, he said.

"Those ​choices will hit future yields and shape our food supply and commodity prices for the rest of this ​year and all of the next," he added.

The FAO Food Price Index, which measures changes in a basket of globally traded food commodities, rose by 2.4% from its revised February level.