Both sides went close before Knoyle settled the contest just shy of the hour mark with his first goal of the season and second in 77 games.
Right-back Knoyle, who played in a back three in Tom Anderson's absence due to illness, leathered the ball home from the edge of the box following Ben Close's cutback.
The win halted Rovers' two-game losing streak in League Two and moved them up to tenth and within two points of the play-offs.
5. Kyle Knoyle - 8
Coped well on the right of a back three and blasted home the winner with a fierce strike. Photo: Liam Ford/AHPIX LTD
6. Ro-Shaun Williams - 7
Deserves credit for bouncing back from a bad day at the office and the criticism that followed. Photo: Liam Ford/AHPIX LTD
7. Tommy Rowe - 7
Generally coped well in defence and hit the bar with a first-half header. Photo: HOWARD ROE
8. Ro-Shaun Williams - 4
Was beaten to the ball moments before the first goal and got robbed on the halfway line for the second. A bad night. Photo: Howard Roe/ahpix.com