St George Illawarra have been held scoreless for the second week in a row, beaten 26-0 by a rampant Broncos in their NRL clash in Brisbane.

The Broncos barely moved out of first gear on Thursday night but did more than enough to demonstrate the huge chasm in class between themselves and the error-riddled Dragons in front of 29,869 fans at Suncorp Stadium.

It is the first time a NRL team haven’t scored in consecutive matches since Cronulla’s three-match drought in 2014.

And this Dragons loss can’t be blamed on Benji Marshall, the veteran halfback who was in the gun after their nightmare loss last weekend to North Queensland.

Marshall was a late withdrawal for the Dragons due to a hamstring strain he picked up in the Cowboys match, and his teammates were unable to ignite their attack in his absence.

It is Brisbane’s fifth win of the year, third in a row and puts them clear on top of the ladder above second-placed Melbourne, who host Canterbury on Monday.

Coming off a tough five-day turnaround, the Dragons completed just nine of their 17 sets in the first half and were fortunate to go into the sheds only 12-0 down.

Corey Oates opened the scoring for Brisbane just three minutes in as the recipient of a mesmerising cut-out ball from the in-form Anthony Milford.

A Corey Parker penalty soon afterwards gave Brisbane a 6-0 lead, and then Alex Glenn slammed down a grubber from Ben Hunt in the 29th minute to widen the margin.

Even when the Dragons did generate openings, they were discovering brand new methods of self-sabotage.

Lock Jack de Belin looked certain to end a two-week wait for a St George Illawarra try when he brought two Brisbane defenders with him over the line in the 18th minute.

But replays showed his own arm was stopping him from grounding the ball.

Then early in the second half, winger Peter Mata’utia was played into a yawning gap just three metres out from the line – only to infuriate Dragons fans further by knocking on.

The Broncos duly made them pay as heavy legs began taking over late in the match, with Milford scoring in spectacular style right on the dead ball line in the 72nd minute, before a Hunt flick pass unleashed Jordan Kahu two minutes later.