In the backs, Robbie Anderson justified his promotion to the starting line-up with a solid all-round display, Sam Monaghan made a positive difference when he moved from fullback to first-five in the second spell and Inia Katia was typically lively, first at halfback and then at centre, when he came off the bench.
Samu Kabunavanua (3), Simon Dibben, Ace Molo and Lasa Ulukuta were the try scorers for Wanganui and Dane Whale landed four conversions. Robbie Anderson, Cameron Hayton, Sam Monaghan and Inia Katia scored the Wairarapa-Bush tries and Ben Aoina kicked two conversions.
In other Heartland games played on Saturday, Horowhenua-Kapiti beat South Canterbury 23-11, Mid-Canterbury defeated North Otago 28-7, Poverty Bay beat Thames Valley 17-9, Buller beat West Coast 29-14 and King Country accounted for East Coast 34-7.
Saturday's loss saw Wairarapa-Bush drop one place, from 10th to 11th, on the competition table. Buller lead with 32 points, followed by Poverty Bay 26, Horowhenua-Kapiti 24, South Canterbury 21, Mid-Canterbury 21, King Country 20, Thames Valley 17, Wanganui 15, North Otago 15, West Coast 8, Wairarapa-Bush 7 and East Coast 0.
Wairarapa-Bush's final match for the season is against Buller at Memorial Park next Saturday and with Buller already guaranteed a home Meads Cup semifinal -and a home final if they win there - they now have the option of resting key players for the Masterton game.