Michael Withers, a makeshift full-back, scored four tries and the winger Leon Pryce was inspirational. Once in front, the Bulls eased into a 16- 0 half-time lead and then cut loose to go 38-0 ahead with just over an hour gone.
Hull, who may need a better points difference than Huddersfield to give themselves a chance of avoiding relegation, managed two late tries but the 44 they conceded will have damaged their chances.
Salford are still in danger of relegation after losing 36-10 to Wakefield. The turning point came early in the second half when the Wildcats ran in two quick tries while the Salford scrum-half Martin Crompton was in the sin-bin to make it 22-10. Salford must win one of their last two matches to secure their top-flight status.
Hull Kingston Rovers completed their collapse from the top of the Northern Ford Premiership with a 23-10 defeat at Featherstone Rovers in the decider for the final play-off place.
The Robins, early pacesetters in the Division before slipping out of the top four, knew victory would have guaranteed them the last position in the end-of-season play-offs.
But, after going ahead through Scott Yeaman Hull KR capitulated and Featherstone - who by contrast have come from nowhere to reach the top five with six straight wins - dominated the match.
The winger Matt Bramald claimed two tries late in the first half, paving the way for a 18-4 interval lead. Despite a 58th-minute try by Hull's Paul Fletcher, Featherstone kept calm and a Richard Chapman drop goal followed by a Jamie Stokes try earned last season's beaten Grand Finalists another go at the big time.Reuse content