Michael Palmer wrote:
>
> Why? I would think that Varroa would have a hard, if not impossible 
> time becoming resistant to the acidity of OA.
> Mike
>
I would never say impossible since you are dealing with a bug that 
reproduces quickly, so you can have many generations over a short 
period. So things can happen that allow resistance (tolerance) so the 
separation between the dose that kills the mite is closer to the dose 
that harms the bee.At that point, treatments would be 
counter-productive. (But the bee may also be more tolerant, so it could 
be a moving target. Who knows?)

Even humans can develop a tolerance for many poisons, like arsenic.

My guess is that it, if it does happen (and I tend to agree with Mike, 
that it will not), will take longer than the ten years for Apistan. We 
shall see it first in Europe, so they will let us know.

Bill Truesdell
Bath, Maine

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