Vernon Philander runs riot, Australia bundled out for 85

Hobart: Australia's hopes of preventing South Africa from winning a third consecutive series Down Under suffered a major setback after recording their lowest total against the Proteas at home in Hobart on Saturday.

Steve Smith's hapless team were demolished for just 85, with Vernon Philander snaring five for 21 as South Africa seized control on just the opening day of the second Test.

At tea, the Proteas strengthened their hold with an unbroken stand of 43 with Stephen Cook on 23 and Perth centurion Dean Elgar not out at 17.

The capitulation revisited the nightmares of their miserable 47 in Cape Town in 2011 and England's demolition for 60 at Trent Bridge last year.

Only skipper Smith provided any backbone in his unbeaten knock of 48 as the Australians failed to back up their talk of rebounding from their comprehensive 177-run thrashing by the Proteas in the Perth series opener.

South Africa are on the verge of emulating the intimidating West Indies teams of the 1980s-1990s with three straight series wins in Australia after their convincing victory in Perth.

The Hobart rout also follows the first innings collapse of 10 for 86 in Perth when they squandered a 158-run opening stand to surrender meekly to the Proteas.

Cricket statisticians were in overdrive as Australia plumbed new lows in Hobart -- it was also their lowest total since their 76 at home against the West Indies in 1984.

David Warner was the barometer of an approaching Australian maelstrom when he recklessly slashed at a wide ball in Philander's opening over and was caught behind.

It was an irresponsible shot from the Australian vice-captain and things only got worse in Kyle Abbott's following over when recalled Joe Burns was trapped leg before wicket.

The home side lost both openers for just two runs and it was a steady procession from the wicket with only Smith offering any spirited resistance.

The Australians reached lunch at 43 for six after Usman Khawaja edged Philander to Hashim Amla at slip for four and Adam Voges was out next ball, caught behind by Quinton de Kock.

Callum Ferguson, who fought off a hat-trick ball after coming to the wicket in his first Test, was brilliantly run out for three by a direct throw by fielding substitute Dane Vilas while going for a second run.