>
>
> > Is it that some miticides are more like the hammer and others less so?
>
Yes, but more like a blowtorch would be more appropriate. Thymol and acids
destroy cellular membranes, among other actions.
For varroa to evolve resistance to OA would likely involve tradeoffs that
would prevent them from avoiding being groomed off by the bees.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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