South Australia 9 for 222 (Carey 56*, Feldman 3-44, George 3-56) trail Queensland 7 for 475 dec (Renshaw 108, Khawaja 106, Wildermuth 76, Hartley 72*, Zampa 4-141) by 253 runs
Queensland will claim a major first-innings advantage some time on day three after continuing to dominate South Australia in the Sheffield Shield match at the Gabba.
Jack Wildermuth and the wicketkeeper Chris Hartley pushed the Bulls as far as 7 for 475 declared before Luke Feldman and the former Redback Peter George tore into South Australia's batting, including the Adelaide Test aspirants Callum Ferguson, Travis Head and Jake Lehmann.
On 4, Ferguson edged Feldman behind to Hartley, and on 7, Lehmann did likewise to George. Head made it as far as 37 before he was beaten and bowled by George.
At 5 for 73 the Redbacks were in dire trouble, but their situation was improved somewhat by the intervention of the gloveman Alex Carey and the wrist spinner Adam Zampa, who played contrasting innings to at least push South Australia past 200.
Chadd Sayers, who went wicketless in the Bulls' first innings, will also spend the night wondering how much his fruitless spell will have affected his chances of being named in the Australia Test squad.