Russian grain harvest

Russia’s ban on grain exports as a heat wave parches crops in the world’s third biggest wheat exporter has raised questions whether such export curbs break World Trade Organization rules. Russia is not a member of the WTO, and it remains to be seen how its new grain policy will affect its 17-year-old bid to join. But other grain exporters, such as Ukraine, which is also considering export curbs, are part of the global trade referee.