Re: How long until you have resistant bees?
I think most of us are still waiting for the answer to this question. I am not sure who told you three years. But if it where just a matter of not treating for 3 years in order to have resistant bees I think everyone woudl rather avoid the cost of treating.
Resistant bees are more an issue of something you work toward from many directions. How long it takes is however long it takes.
Now treatment free is something you can do right here right now. Your bees may not survive it, but that does not prevent you from doing it.
In short you are asking a simple question to a complicated issue.
Significant Minority vs Insignificant Majority, 20% of causes produce 80% of the effects.