I am working on my first trap-out (I have another thread here about that). The colony has been in a concrete block wall for at least 8 years. I was curious to see how bad the mites would be on a colony that had never been treated and appeared quite healthy. I did an alcohol wash today and got 52 mites from 451 bees!!
I searched google for any papers on mite loads in feral colonies and didn't come up with much. Have any of you ever tested feral colonies before?