Edfors, meanwhile, left it late to earn his win, holing a putt from 10 feet after a fine approach shot at the last to leave Buckle needing a birdie to take the tournament into a play-off.
Going into the afternoon session, they beat the tough Danish pair of Soren Hansen and Soren Kjeldsen 2 and 1, the victory sealed by a superb approach shot by McIlroy on the 17th and a five-foot par putt from McDowell.