Steelswarn roach vs Stardust dragon, who's effect would go first?

Would Roach the summon first or would stardust negate the effect and destroy it?

Steelswarm Roach negates Stardust, Stardust doesn't have a chance against Roach. (if Roach is used to negate Stardust) and no need for the poll, this is a simple question.

the poll= if there are problems a vote

There's no need for a poll. Roach negates the summon. Stardust does not touch the field.

thanks, really was wondering about that.