It was a deserved win for North Otago, which won the territory and possession battle and scored three tries to one.
It was the second victory in as many games for North Otago. The side is off to a great start in the Heartland Championship.
North Otago should have won by more, as it created plenty of chances but struggled to find the last pass or dropped the ball when the tryline was open.
The North Otago scrum was in the ascendancy all game and was a ready source of penalties.
It attempted to move the ball when possible and its forwards set a good platform and ran nice and direct with the ball.
The North Otago front row of Sam Sturgess, Mike Mata'afa and Kelepi Funaki were into everything and found metres whenever they had the ball.
North Otago led 7-6 at the break. North Otago winger Adam Johnson almost scored seven minutes into the second half but spilt the ball with the tryline open.
Five minutes later second five-eighth Sam Tatupu charged on to the ball and ran over the final defender to score. Ten minutes later, his midfield partner Lemi Masoe scored the third try for North Otago after a nice run from winger Howard Packman.
Wairarapa-Bush scored a try through reserve back Tim Priest with 15 minutes left, from a chip kick, but left it too late.
The visiting side was not accurate enough, had little ball and ran across field too much.
The first half had plenty of effort from both sides but not much accuracy.
North Otago had most of the ball and though it strung plenty of phases together, it struggled to find line breaks.
Many times the North Otago side worked its way into a handy position before coughing the ball up through various errors.
Five minutes before halftime, it scored the only try of the first half.
From a 5m scrum first five-eighth Mike Williams fed the ball to winger Packman coming into the backline and he ran into the gap, slipped a tackle and scored.
Apart from the front row, the best for North Otago was halfback Robbie Smith and winger Packman.
Impressive for an out-gunned Bush side were hooker Bruce Kauika-Petersen and loose forward Johan van Viet.
Heartland Championship
The scores
North Otago 25
Howard Packman, Sam Tatupu, Lemi
Mason tries; Robbie Smith 2 con, 2 pen
Wairarapa-Bush 11
Tim Priest try; Tipene Haira 2 pen
Halftime: 7-6