Diagouraga headed home his third goal in 15 games for the Pilgrims in the 14th minute when he headed home a free-kick from David Fox.
Argyle then doubled their lead three minutes before the break when Graham Carey saw his penalty saved by Shakers keeper Connor Ripley, but he reacted quickest to the rebound to score his eighth goal of the campaign.
The game was then effectively ended as a contest on 78 minutes when the ball fell to Antoni Sarcevic who slotted home his first goal of the campaign, after the visitors had earlier been reduced to ten men following the dismissal of substitute Ryan Lowe.
Afterwards it was announced that Diagouraga would be leaving Home Park to join Fleetwood Town to be nearer to his young family and Pilgrims manager Derek Adams paid tribute to his displays for the club.
“It looks like he (Diagouraga) has played his last game for us and he’s moving on,” said Adams.
“He’s done well for us and we are delighted with the
contribution that he has made to the football club and in the games he’s played
he’s done exceptionally well. We would have liked to have kept him but he has
chosen to move further north."
