> When I first joined this List a decade or two ago a high proportion of the
> correspondence was about Acarine, the tracheal mite,but nowadays it is very
> rarely mentioned.
>

But why? This is a great correlation is not causation. It might be
resistance but it could as well be that Varroa treatments also take care of
tracheal.

One other thing, that reisitant bee may easily revert when the pressure is
removed. That is not evolution. We have seen trachel losses in Maine but
they were origionally blamed on Varroa. It has not gone away.

Also, the 70-80% losses in an insect population is classic pest-host type
cycle. Major losses, build back up and suffer major losses.As long as
Varroa is around we will never see it from Tracheal mites.

Bill Truesdell
Bath, Maine

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