Re: Something needs to change - looking for suggestions
This would not work. When one group of colonies becomes overwhelmed with mites, they will dwindle, then the healthy bees will rob out the dying colonies and in the process bring huge loads of mites home. The end result is a whole yard dead. If you want to do this, you will have to separate the bees far enough to avoid robbing.
Here is your proof
Divide a yard in 1/2. Work the hives the same except....treat one side when the mites get high. Don't ever treat the other half for mites.
It's simple, easy, and cheap. No skill involved. Definite results. Local relevance.
NW Alabama, 47 years, 22 colonies and growing, sideliner, treatment free since 2005, 14 frame square Dadant broodnest