Linnea Ström was tied for eighth with Maja Stark after the first round, but recorded two birdies and four bogeys in the second round.
Leading American star Nelly Korda went seven under par for the second day in a row; she is at -14 after two days of play and has taken hold of the title.
She leads compatriot Ryann O'Toole by seven strokes, with only the early starters having finished playing.
Maja Stark (-3) and Linn Grant (-2) went out in the second round after 8 p.m. local time in Sweden on Friday.
