Carruthers gives Iron lead
Shortly beforehand Argyle had taken the lead through Marino Keith, when he found himself unmarked at the right hand side of the area.
Argyle had only got themselves back into the game two minutes before the break, through an extremely dodgy penalty decision.
Despite apprently pulling out of the challenge Evans was adjudged to have brought down Argyle forward Lee Hodges, and went into the book for his troubles.
United had taken the lead through Martin Carruthers, his 100th career goal
Nathan Stanton picked up a yellow card ten minutes into the second half, meaning he will now face a one match suspension, handily Hull City, Shrewsbury Town and Rushden And Diamonds are all also losing.