Kaikorai were world-beaters for 60 minutes at Watson Park.
That final quarter will make for a hard watch.
Their loose forward trio of Gregor Rutledge, Slade McDowall and Lucas Casey dominated the breakdown and prop Philip Taua-Ah Soon had a monster game, while Ben Miller was all class at first five and Mefi Tupou made some strong carries in the midfield.
Taieri posted a 57-36 win against University at the University Oval to strengthen their hold on pole position.
Fulltime scores
They beat Harbour 45-33.
But they were up 40-0, made a series of changes and forgot how to tackle.
Action from today's premier club rugby match between Southern and Zingari at Bathgate Park. Photos: Gerard O'Brien
But the game was effectively already won.
Southern dispatched Zingari-Richmond 45-24 at Bathgate Park, and Green Island edged Dunedin 24-22 at Kettle Park.
Fulltime scores
Dunedin 22-24 Green Island
Southern 45-25 Zingari
University 36-57 Taieri
Harbour 33-45 Kaikorai
