Boston's five-year stay in the Football League is hanging by a thread after a draw with relegated Torquay.
Despite dominating the first half, the hosts could not find a breakthrough.
Torquay's Lee Thorpe was dismissed in for clashing with Ernie Cooksey but it was the visitors who took the lead through Lee Mansell's angled shot.
Bradley Maylett headed back across goal for Drewe Broughton to nod in the equaliser but the hosts were unable to find a winner.
Boston Utd: Marriott, Stevens, Cryan, Greaves, Clarke, Ellender, Cooksey, Farrell, Galbraith (Maylett 59), Broughton, Green.
Subs Not Used: Rowntree, Nunn.
Booked: Broughton, Cooksey.
Goals: Broughton 83.
Torquay: Rayner, Andrews, Woods, Robertson, Robinson, Dickson (Reid 46), Hockley, Mansell, Cooke (McPhee 46), Thorpe, Graham (Hill 78).
Subs Not Used: Horsell, Gordon.
Sent Off: Thorpe (42).
Goals: Mansell 49.
Ref: N Swarbrick (Lancashire).