Pietersen claimed that Prior was the ringleader of a group including senior bowlers Graeme Swann, now retired, Stuart Broad and Jimmy Anderson, who would lay into their team-mates for dropping catches.
"The double standard for me was the bigger thing. If one of them messed up -- if Jimmy messed up, or Swanny -- nothing was ever said. Prior left them alone," Pietersen told the Telegraph.
"He never left alone (Nick) Compton or Ravi (Bopara) or Trotty (Jonathan Trott).
"I went after Prior and said Prior shouldn't be in that side because he's a bad influence, a negative influence -- he picks on players. He's back-stabbing, he's horrendous, he's bad for the environment."
"The double standard for me was the bigger thing. If one of them messed up -- if Jimmy messed up, or Swanny -- nothing was ever said. Prior left them alone," Pietersen told the Telegraph.
"He never left alone (Nick) Compton or Ravi (Bopara) or Trotty (Jonathan Trott).
"I went after Prior and said Prior shouldn't be in that side because he's a bad influence, a negative influence -- he picks on players. He's back-stabbing, he's horrendous, he's bad for the environment."