Davies opened the scoring for Wigan after quarter-hour and Banks added their second two minutes later with Isobel Rowe changing each to make it 12-0.
Davies’ second got here shortly after the half-hour when she crossed within the nook and she or he wrapped up her hat-trick with an interception earlier than Rowe transformed once more to place the guests 22-0 up on the break.
Wigan prolonged their lead inside the opening minute of the second half when Singleton darted over from shut vary.
Barrow obtained on the scoresheet within the fifty fifth minute when an Emma Hutchinson break led to Jodie Morley crashing over, with Jodie Litherland touchdown the extras to make it 28-6.
However Wigan responded strongly as Hilton crossed earlier than Davies grabbed her fourth and fifth tries of the afternoon to stretch the lead.
Casey added Wigan’s ninth and last attempt on 72 minutes to seal a snug win.