WA's Bancroft breaks form slump against SA in Shield

WA opener Cameron Bancroft has belatedly found some form with a half-century against SA. (Morgan Hancock/AAP PHOTOS)

Cameron Bancroft has emerged from a horror form slump with an unbeaten half-century to steer Western Australia to a powerful position against South Australia in their Sheffield Shield match.

Bancroft, who was overlooked for Australia's team for the first Test against India, made 72no as WA reached 2-185 at stumps on day three of the pink ball day-night fixture at Adelaide Oval.