New Zealand were left frustrated by Wyatt's damaging 82-run partnership with Nat Sciver-Brunt, which put England in the driving seat to set a target of 198.
With an eye on October's T20 World Cup in Bangladesh, the hosts picked four spinners and the White Ferns collapse was sparked by Sarah Glenn, who took three wickets in one over.

England steamed ahead in the powerplay as Maia Bouchier and Wyatt hit 52 without loss, but Lea Tahuhu found the breakthrough when Bouchier fired the ball straight to Georgia Plimmer on the boundary.
However, the visitors struggled to break a dominant partnership between Sciver-Brunt and Wyatt, who smashed 82 from 45 balls.
Sciver-Brunt caused problems as a destructive innings saw her hammer nine boundaries on the way to scoring 47 from 23 balls before her entertaining knock was ended by Eden Carson, who had her caught by Amelia Kerr.

Wyatt eased to her half-century in 36 balls, but her impressive innings was brought to a close after lofting the ball to Maddy Green on the boundary off Tahuhu.
Freya Kemp's late cameo of 26 then boosted England's total as they finished on 197 for three.
Despite losing Plimmer early, Suzie Bates led the charge for New Zealand and dominated in a 51-run partnership alongside Kerr before the latter was caught at deep midwicket off Charlie Dean.