Radio Station Gives Justin Bieber Silent Treatment Until He Goes to Rehab

A radio station in Canada is trying to do what Scooter Braun can't ... get Justin Bieber into rehab ... but the station has a secret weapon.

Hot 89.9 in Ottawa just radioed out to its listeners -- Justin is persona non grata on its airwaves UNTIL he checks himself into a facility to get badly needed help for drug abuse.

So far Justin has laughed off all attempts to get him into treatment.

Sounds good in theory ... but seriously, the guy hasn't had a hit in a while so who's gonna really notice?