Problem with manipulating the IA

Hello,

On the old AoE II, I used a trick to simulate a famine by not allowing the AI to make farms. It worked really well.

But now it seems that the AI can find its food. I don’t see them hunting or anything, so I guess they buy it in the market? Maybe? Anyway they have a huge army and I can see them trade a lot.

Can someone help me making this food shortage happen on the ennemy AI? Would not allowing them to trade work, for example?