The small increase in April is the third month of gradual rises on the index after four consecutive annual declines.
FAO forecast world cereals output in 2016-17 would be 2.526 billion tonnes, almost unchanged from the previous year and fractionally above the forecast it gave the previous month.
World wheat output is due to hit 716.9 million tonnes in 2016-17, FAO said, raising its previous forecast.
Food prices on international markets in April were almost 10 percent lower than a year ago, FAO said.
More about:
