My troops consume more food than I can produce how do I stop it?

I have the same problem. Trained too many troops. I cannot find a way to stop it (unless someone attacks you and kills lots of troops. I am trying to level up so that I can build more farms.

If you haven't already then try to station heroes in farms and unlock their skill to increase food production.

You can research the techs;

Ferilizer - Increase food production

Rapid Growth - unlock rapid production to get a one time (cool down) increased yield on farm production.

Also make sure you have max farms and fully levelled.

Join a good alliance and discuss getting Logistics Division levelled up ASAP to reduce troop food consumption

Upgrade your heroes to increase hourly income on resources. Examples are the pioneer and green thumb hero.