Cows have been changed by our breeding over thousands of years so they can't now do without our management. Has the same happened to honey bees? I support bumble bees, hedgehogs etc by providing suitable housing in the garden, but it would be irresponsible, even cruel, to do the same with honeybees if they are so domesticated they can't cope without management and chemicals. Are there feral colonies out there and do they pose a threat to "kept" colonies?
You'll know, because of your background, that in the early days of varroa our honey bees could not cope without miticides simply because the mites were an alien pest that they had never met before.
A. cerana can cope with varroa because they've evolved together.
Ron Hoskins of the
Swindon Bee Project has been selecting for varroa tolerant (hygienic) bees, ones that groom off the mites in the same way.
Ratnieks at LASI has been testing for hygienic bees by freeze-killing brood, and seeing what percentage is removed from the comb.
At the same time, a fair number of beekeepers are being more flexible with varroa treatment - at least locally to us they are - and are leaving colonies to deal with the mites as best they can. If the colony dies it fails the Darwin test, and both bees and mites in that box will no longer contribute to the gene pool.
There are feral colonies that survive unaided and, if the number of swarms this year is anything to go by, they seem to be doing quite nicely.
But no beekeeper can really afford to be complacent, because there are other diseases and disorders that can kill a colony, so even if you're mostly a 'hands-off' beekeeper it's important to do disease inspections and that's where top bar hives can make things difficult because it's less easy to quickly clear bees from the comb.