Buoyed by back-to-back victories, boss Ady Pennock resisted the temptation to tinker and named an unchanged side for the third consecutive match.
Rovers hit the ground running. Elliott Frear''s first-time cross saw Jon Parkin's glancing header fly wide after good foraging from Lee Hughes.
Frear's incisive running was causing the Derbyshire outfit problems and from one such burst, Anthony Howell saw yellow on 21 minutes.
The game hit a stalemate, but a contentious penalty appeal against Forest Green turned the tide in Rovers’ favour on 31 minutes.
Alfreton appealed for a Chris Stokes handball, but the ball was quickly recycled to midfielder Sam Wedgbury, who allowed Parkin to break from deep for Rob Sinclair to feed the supporting David Pipe. His arrowed in cross fell to Hughes, who used his predatory instincts to smash home his second goal of the season.
Rovers were rocking. Stokes’ buccaneering run allowed Frear to find the leaping Clovis Kamdjo to plant his header into the arms of Alfreton keeper Jon Stewart.
Forest Green: S. Russell; D. Pipe, L. Oliver, D. Coles, C. Stokes; R. Sinclair, C. Kamdjo, S. Wedgbury, E. Frear J. Parkin, L. Hughes
Subs: A.Banguara, M. Kelly,K Guthrie, J Norwood, L.Rodgers.
Referee: B. Huxtable