Former Australian batsman Greg Blewett smashed the highest one-day score of his career, then took his best bowling figures, to dominate a thrashing of New South Wales in their day-night ING Cup match at Adelaide Oval.

After being sent into bat by stand-in Blues skipper Stuart MacGill, SA scored 7-286, led by Blewett's 125 from 145 balls, then bowled NSW out for 199, with Blewett taking 4-16, to win by 87 runs.

It was just SA's second win in eight matches this season, both of them coming against the Blues, and lifted the Redbacks from the bottom of the cup table, with NSW falling into last position.

SA also earned a bonus point for the size of its victory, the second thrashing the Blues have suffered in as many games, after last weekend's 121-run loss to Queensland in Sydney.

Blewett, who opened the SA innings, hit 11 fours and four sixes, with two of those sixes coming from the bowling of MacGill, who went for 49 from his six overs.

It was his second century of the season, after scoring 118 not out against Tasmania in Hobart in November, which was his career highest score, and he now has 431 runs this season at an average of 71.83.

He was well supported by former New South Welshman Mark Higgs (48 from 46 balls) and youngster Callum Ferguson (72 not out from 70 balls).

NSW started its run-chase strongly, with openers Matthew Phelps (55 from 55 balls) and Phil Jaques (22 from 23 balls) putting on 78 from 70 balls for the first wicket.

But when Jaques fell in the 12th over, caught behind from a top-edged pull shot off Paul Rofe's bowling, it sparked a collapse of 5-15 in six overs that took NSW to 5-93 in the 18th over and killed off its victory chances.

Second-game wicketkeeper Daniel Smith (49 not out) - filling in for absent skipper Brad Haddin, who was playing for Australia at the SCG - and all-rounder Shawn Bradstreet (41) then put on a 87-run sixth-wicket stand to add a small measure of respectability to the Blues' total.

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