St Helens (46) 68
Tries: Gilmour, Gidley, Long, Gardner, Clough, Flannery, Wilkin, Meli 2, Roby, Sculthorpe 2 Goals: Long 8, Sculthorpe 2
Castleford (0) 12
Tries: Dixon, Shenton Goals: Dixon 2
Super League leaders St Helens ran in 12 tries to demolish Castleford and extend their winning run to 14 games.
Matt Gidley started the rout by giving Saints the lead after just two minutes.
Sean Long, Lee Gilmour, Ade Gardner, Paul Clough, Chris Flannery, Jon Wilkin and Francis Meli all crossed to helped make it 46-0 by the interval.
Cas claimed two consolation tries after the break but James Roby, Paul Sculthorpe (2) and Meli all went over to complete the emphatic victory.
St Helens coach Daniel Anderson (on the news that planning permission has been granted for the club's new stadium):
"The stadium is probably the biggest news today - bigger than the game - because it's fantastic fillip for the club.
"The club itself is so powerful now, but with the infrastructure it has got behind it then it will be quite an aspirational place to work and play.
"I look forward to watching some St Helens games on television in the new stadium and everyone will want to be at that first game.
"We have a big game next week - it's Wigan at the JJB Stadium and that's another challenge for us before the Challenge Cup semi-final against Leeds.
"I enjoyed watching some of the tries we scored today."
Castleford coach Terry Matterson:
"We gave away a penalty right from the kick-off and in the second minute Saints scored their first try.
"But we at least had some pride in the second half and our aim now this season is to try and make sure we don't finish bottom of the table."
St Helens: Wellens, Gardner, Gidley, Talau, Meli, Pryce, Long, Graham, Cunningham, Hargreaves, Gilmour, Wilkin, Sculthorpe.
Replacements: Roby, Flannery, Clough, Fa'asavalu.
Castleford: Donlan, Dixon, Shenton, Owen, Wainwright, McGoldrick, Sherwin, Higgins, Henderson, Korkidas, Catic, Lupton, Westerman.
Replacements: Dorn, Leafa, Boyle, Moore.
Referee: P Bentham (Warrington)