Wales did not look like a team in poor form as they caused problems for South Korea from the outset, with goalkeeper Kim Min-jeong making a sharp save to repel Ingle’s drive.
From the Lily Woodham corner that followed, Ingle headed home from point-blank range with Kim left stranded after just six minutes.
Wilkinson had made seven changes to the team which began last month’s dispiriting defeat by Poland, the Wales head coach fielding something closer to her strongest line-up in southern Spain.
Her reward – for an hour – was a much more convincing performance, with Wales’ only frustration in that period being the failure to build on Ingle’s seventh international goal.
Ingle saw a second header saved, Hannah Cain volleyed wide and Mared Griffiths and Carrie Jones both had decent efforts from just outside the area.
South Korea only really threatened with one sharp counter before the break, but Gemma Evans saved her team with a fine recovery challenge on former Chelsea star Ji So-yun.
Wales were on the front foot again early in the second period, with substitute Elise Hughes driving a shot against the post and Jones pulling another big chance across the face.
Wilkinson must have feared her team would be made to pay for their profligacy, particularly as they lost momentum in an increasingly scrappy contest.
South Korea’s moment duly arrived when a short corner routine ended with Jang Sel-gi crossing for substitute Kim to head beyond a helpless Olivia Clark.
