Prestwidge claimed 4-41 from her 10 overs as she and allrounder Grace Harris (3-35 from 10 overs) put the brakes on the Tigers run chase of the Fire's total of 240 from their 50 overs.
Harris, who also scored 30 from 26 balls, was player of the match, capping off a fine day for the family with sibling Laura top-scoring for Queensland with a hard-hitting 51 from 30 balls.
Laura also hit the first six of the season for the Fire; generating the first donation of the summer to Queensland Cricket charity partners Foodbank,
For the second straight season, QC will be donating $100 for every six hit by the Bulls and Fire during the 2019-20 Marsh One Day Cup and WNCL to help raise much needed funds and awareness for the great work Foodbank do in the community.
The Fire lost their opening round WNCL one-day match to Western Australia on Saturday but produced a much-improved effort today off the back of solid batting efforts by Harris and the promising Josie Dooley (45). Prestwidge (17) and Haidee Birkett (11no) chipped in with handy runs in the final overs of the Fire innings.
Tasmania never struck the partnerships it needed to challenge for victory, dismissed for 139 from 40.2 overs. The 101-run win produced a bonus point for the Fire which will now go into hiatus temporarily as the focus shifts to the rebel Women's Big Bash League which is being run as a stand-alone tournament for the first time this season from next month.