Allrounder Liam Scott picked up two breakthroughs as South Australia tightened the screws on Tasmania on day three of their rain-affected Sheffield Shield match.
The Tigers limped to 6-181 at lunch on Friday at Bellerive Oval in reply to the visitors' first innings of 220.
Scott (2-31) removed nightwatchman Lawrence Neil-Smith (10) and ended the resistance of Ben McDermott (45) when he trapped the middle-order batter lbw late in the session.
Redbacks' skipper and Ashes aspirant Travis Head, who was out for 14 in SA's first dig, then trapped Jake Doran (14) in front on the stroke of lunch with his part-time off-spin.
Tasmania resumed the day at 3-102 and were ultra defensive early, with Neil-Smith soaking up 65 balls.
Rain wiped out almost all of day one and more showers are expected on Friday afternoon with five sessions of the match remaining.
Young SA opener Henry Hunt was the headline act on day two - the 24-year-old bringing up his second Shield century in as many innings with 134 from 236 balls.
Veteran quick Peter Siddle was the pick of Tasmania's bowlers with 4-42 from 24 overs.
