Local player Regan Graham opened the scoring with his first goal for the Reserves.
There were four good scoring chances in a goalless first half, three of them falling to Berwick.
The first came the visitors’ way, an inswinging corner from Paul McDermott which keeper Ross McMullen stopped on the line before Jordyn Gill booted away the ball.
A wind-assisted 45 yard free kick from Berwick’s Ben Miller hit the underside of the bar. Ryan Scanlan advanced 30 yards but Lily keeper Steven Hay got his foot to Scanlan’s low delivery before Dean Carse could connect with it.
Kenny O’Brien also sent the ball flashing across the face of goal but there were no takers. Instead, the ball ended further downfield from where Miller’s long shot looked harmless until it hit Scanlan and changed direction. Hay did well to track the deflected ball, diving just in time to punch it away.
Graham’s goal came early in the second half following a free kick from the in-form Ewan Saunderson. A couple of headers later, the ball dropped perfectly for the unmarked Graham to strike.
A minute later, Carse should have doubled the lead but fired over the bar from eight yards after taking an excellent pass from O’Brien.
As the visitors strived to find an equaliser, Reserves’ coach Mark Lamb bolstered his three man backline of Saunderson, James Elliot and Gill by pulling Ross Brady back from midfield.
Despite some smart link play and cleverly crafted through balls from Easthouses, Berwick soaked up the pressure so well that McMullen did not have a real save to make.
Rangers put the issue beyond doubt eight minutes from time. Scott Borthwick lost possession deep inside his own half.
Carse squared to Stephen Anderson to score from six yards, a fitting reward for a player who covered a lot of ground throughout the afternoon.
This was the Reserves’ fourth win in a row but they face a tough task this weekend away to Lowland League Edinburgh City in the King Cup.
Berwick Rangers Res: McMullen, Saunderson, Gill, Elliot, Miller, Anderson, Brady, O’Brien, Carse, Graham, Scanlan ( Nevison -Trialist 46 ).