The Pilgrims were beaten 7-0 in their latest National League U19 Alliance fixture.
Lee Mitchell's side were five goals adrift at half-time and conceded twice more inside the final 15 minutes to compound an afternoon to forget.
Boston (4-1-4-1): Jake Frestle (Nick Ivanov 46); Jamie Gaukroger, Marshall Young, Daniel Fisher, Nathan Stevens; Lewis Bontoft; Xander Crashley (Finlay Armond 65), Mido Turki, Kyle Tate (Owen Sears 46), Jenson Bark; Will Jackson. Sub (not used): Harrison Holland.