Re: Treatment free hives plan of action?
Three years treatment free is a good start but could still be susceptible to mites. The best way to handle this is to pull a bee sample this fall and do a mite count. If the count exceeds 1 per 100 bees, they are probably too susceptible.
I would investigate other sources of genetics that are treatment free and have a 7 or more year history. Bringing in outside stock with verified tolerance will permit you to diversify the genetics which will avoid problems when bees are too closely line bred.
DarJones - 46 years, 14 colonies (max 40), sideliner, treatment free since 2005, 11 frame broodnest, small cell