O'Gara cleverly orchestrated the next try, taking a tap penalty and loftinga high crossfield ball that left Andrew Trimble needing only to catch it and ground it for a 15-0 lead on 19 minutes.
Bosc was the orchestrator of the Dragons' third try, loftinga high-ball for Wilson, who took full advantage of confusion in the Wigan defence to touch down.
It owed much to the hard work of Constable, who beat York keeper Michael Ingham to a long ball over the top, lofting it back into the middle where Jack Midson nodded down to Green who dispatched a sweet left-foot half-volley into the top corner from the edge of the box.