Of that, 80% was soft white wheat, with Spain the biggest importer of that variety, according to the European Commission.

WSJ: Asian Buyers Shun U.S. Wheat

Used to make noodles and pastries, some soft white wheat was found to be genetically modified on a farm in Oregon.

WSJ: Asian Buyers Shun U.S. Wheat

The European Union recommended that its members test "soft white wheat, " which accounts for 17% of U.S. wheat exports, for genetically modified grain.

WSJ: Asian Buyers Shun U.S. Wheat