You're probably thinking of tobacco, which lost its supply managed status in 2009 under the Tory government you speak. Wheat was never supply managed in Canada, only diary, poultry, and formerly tobacco.

Wheat and barley operated under the single desk principle. The mandatory pool operated by the CWB, which the Tories also shut down, only applied to western provinces. Ontario had/has its own wheat board, now known as Grain Farmers of Ontario. Ontario farmers voted to eliminate the mandatory pool in the late 90s and was completely phased out by 2003, although an optional pool remains.

And yes, I'm aware of Ontario's actions. My rail stocks continue to do well. Choo choo!

Then Canada just bought them out. Sugar beet farmers grew something else, and US companies built their candy factories in Canada to avoid the US tariffs on sugar.

And possibly our coke has real sugar, I can’t figure out for sure.

Tangent - I don't know any other country in the world where the public is actively picking stocks like this. Given that, it's probably bad for the majority of people, I wonder if, at some point of US history, it was pushed upon people by some PR campaign (for example, by the finance companies who profit from it).