Do you ever treat your hives for Varroa?
Do you survey for mites?
I don’t, but the University of Nebraska comes out and does it for the USDA APHIS project and I pay to get a health certificate from the state, so they inspect and count mites. Mine are never high.
If you treat, how?
I know mite treatment is a personal preference BUT, the mites are the carriers of the diseases that kill and weaken the bee’s, “deformed wing, K-wing and such.” Once you see the disease your mites are rampant and are spreading to other hives through drifting, drone contact, flower sharing etc…
Considering that there are probably millions of feral colonies in the trees, it seems irrelevant statistically. When you consider that the commercial beekeepers have sometimes 100,000 hives that are barely manages other than treating which swarm at least ones or twice a year and can’t survive without treatments, those are your mite bombs.
To be a responsible Beekeeper you need to manage your livestock. I wouldn’t let my dog run around with mange, which is caused by mites, and say oh well she’s not strong enough to fight it off.
Every colony in North America already has Varroa and DWV. How will you spread it to other colonies when they all already have it?
It’s interesting to note that in places that can’t afford to treat, Varroa are not a problem.
One more in addition to the ones Matt posted: