Duncan Ferguson recorded his long-awaited first win as Forest Green manager after Jordan Garrick's first-half strike saw Rovers past high-flying Sheffield Wednesday.
Everton legend Ferguson - who took charge of the Toffees in two separate interim spells - replaced Ian Burchnall at The Bolt New Lawn on January 26 and lost seven of his first nine games in charge.
But Garrick's strike after 35 minutes ensured Rovers gave their ailing survival hopes a boost and denied Darren Moore's side the chance to return to the top of League One after their second straight defeat.