Ryan Lowe's scored the only goal to help Bury's automatic promotion push as they beat Portsmouth 1-0.Striker Lowe nodded in unmarked in the final minute of the first period to move the visitors to within two points of third-placed Wycombe, having played a game less, and secure a club-record seventh successive away win.Pompey have lost both their games under caretaker boss Gary Waddock after Andy Awford was sacked on Monday.Jed Wallace forced Nick Pope into two saves in a minute as the midfielder caused problems with his free role behind the strikers.Wallace was at it again when he latched on to a Craig Westcarr dinked pass but Pope was equal to it, and it was the 21-year-old who jinked past Adam El-Abd before dragging wide in the 37th minute.Despite the hosts' dominance it was Bury who took the lead on the cusp of half time. Joe Riley delivered a pinpoint cross after a patient move and substitute Lowe nodded in his 10th of th eseason.Lowe nearly added a second in the 46th minute but his 25-yard free-kick flew over.It did not matter, though, as Portsmouth failed to mount a comeback and suffered a third straight defeat.