Skipper Paul Heard rues poor start which saw his side reach 19-3
Bideford came off second best by four wickets in the day one meeting between two sides tipped for promotion.
Tavistock intend being among the promotion candidates this season – and Bideford have the same view of themselves after finishing third last season.
Bideford recovered from 19 for three to make 172 all out, thanks largely to Jayson Bartolo with a patient 67.
Bideford’s new overseas player went in at 14 for two and was ninth out at 145.
Ollie Hannam (16) and Mike Lemmings (11) provided support. Last man Martin Stewart made 22 to keep Tavvy out longer than intended.
Tavvy won with more than three overs to spare with Billy Barriball the anchorman on his debut.
Barriball went in at 79 for two after Dave Ball (34) and Ian Gray (31) got started and batted through to the end.
Rob Bone was 18 not out at the end having put on 67 unbroken with Barriball.
Skipper Paul Heard (3-24) was easily to pick of the Bideford bowlers, although Lemmings kept it tight for seven overs.
Heard didn’t pull any punches in is post-match assessment.
“It was a poor start from us,” he said.
“After winning the toss on a good pitch, only Jayson Bartolo applied himself with 67, and the lower order chipped in usefully but 167 was always short.
“The early bowlers got us back in the game but sloppy dropped catches cost us.
“We were off the pace but we will look to play harder at Seaton this Saturday.”