Wilson had called Boult over for a final warning about his team's bridging before the dismissal, with Boult bending down to demonstrate his players were staying on their feet, but using their hands on the ground to steady themselves, which he interpreted to be legal.
Having been reduced to 14 for the final 12 minutes, Cullinane let in three more tries from St Patrick's breakaways, while scoring another themselves out wide.
Cullinane coach Hayden Hepburn got into a prolonged debate with Wilson following the match about the harsh merits of a red card for that kind of professional foul, while his assistant Vaan Rauhina, over 50 Heartland Championship games for Wanganui, said he could never recall such a decision in his career.
Rauhina praised Boult for otherwise having an excellent game, as did his brother Adam Boult on the wing.
Openside flanker Te Hiiri Ponga and fullback Kody Edwards were the other standouts.
Normal protocol dictates a player sent off in Wanganui rugby will receive an automatic two-week, stand-down period, however appeals can be made to the Wanganui Football Rugby Union if it is felt there are extenuating circumstances.