CASTLEFORD Tigers slumped to their seventh defeat in eight games when they could only score two tries on their way to a 44-12 defeat at St Helens.
Anthony Laffranchi, Paul Wellens, Tommy Makinson and Chris Flannery all crossed for the hosts in a first half in which the Tigers only replied through Paul Jackson's try and Danny Orr's goal.
Saints then ran in four more tries after the interval though Makinson, young centres Gary Wheeler and Adam Swift and scrum-half Jonny Lomax.
Cas got a second try from Steve Snitch with Orr again adding the extras.
Makinson landed two of his four kicks at goal before the break, while Wheeler kicked four from four.
Cas, who have now lost their last nine meetings with Saints, were without the suspended Jamie Ellis, while Ben Johnston was playing only his second game after making his debut in last week's defeat by London Broncos.
Saints were without Michael Shenton, who missed the chance to face his old club, where he will return next season, because of an ankle injury.
Defeat, coupled with London Broncos' shock thrashing of Warrington, now leaves Castleford second from bottom, in danger of a first Super League wooden spoon since 2008.
Scorers - St Helens: Tries: Makinson 2, Laffranchi, Wellens, Flannery, Wheeler, Swift, Lomax; goals: Wheeler 4, Makinson 2. Castleford: Tries Jackson, Snitch; goals Orr 2.
St Helens: Wellens; Makinson, Swift, Wheeler, Meli; Hohaia, Lomax; Perry, Roby, Laffranchi, Soliola, Flannery, Puletua. Subs: McCarthy-Scarsbrook, Flanagan, Clough, Dixon.
Castleford: Owen; Youngquest, Snitch, Thompson, Griffin; Orr, Johnston; Emmitt, Hudson, Huby, Millington, Jones, Mitchell. Subs: Milner, Jackson, Holmes, Massey.
Referee: George Stokes.