MOSCOW (Reuters) - Russia said on Wednesday that unless the United Nations implemented the terms of a memorandum about Russian agricultural exports within three months, Moscow would not restart talks about a deal to allow Ukrainian exports through the Black Sea.

"The UN still has three months to achieve concrete results," Foreign Ministry spokeswoman Maria Zakharova said. "If there are concrete results, we will return to the discussion of this (wider) issue."

(Reporting by Guy Faulconbridge; Editing by Andrew Osborn)