KIEV, Aug 19 - Ukraine will lose 15 percent of its grain crop in two violence-hit regions in the country's east, a spokesman for Ukrainian Prime Minister Arseniy Yatseniuk said.

The former Soviet republic, expected to be the world's second-largest grain exporter in the 2014/15 marketing year, has suffered major disruption since a pro-Russian uprising erupted in its eastern regions several months ago, Reuters reported.