Try-scoring freak Nathan Blacklock continued his hot run with a brilliant hat-trick to lead St George Illawarra to a 34-20 win over South Sydney in Saturday night's National Rugby League match at WIN Stadium.

Blacklock crushed the Rabbitohs' hopes of posting rare back-to-back victories with trademark strikes in the 36th, 54th and 77th minutes.

It was the former Test winger's eighth try in five games since making his comeback to league following his dalliance with rugby union.

He scored in three premier league matches in a row before almost being the hero for St George Illawarra with a double on his return to the top grade in last week's last-second defeat at Newcastle.

It was also Blacklock's seventh hat-trick for the Dragons joint venture.

The premiership's leading try-scorer from 1999-2001 has now scored an amazing 105-pointers in 119 matches.

After trailing 14-6 at halftime, Souths narrowed the gap to four points with a try straight after the break from interchange forward Mark Minichiello.

But with the aid of a strong breeze, the Dragons were always going to be hard to stop and the writing looked on the wall for Souths when halfback Brett Firman stepped his way over from close range in the 50th minute to give the home team a 20-10 advantage.

Blacklock's second try of the night was a beauty.

It came after a Mark Riddell burst up the middle before the supposedly overweight hooker found centre Matt Cooper, who immediately sent the ball to Blacklock to do the rest.

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