>
> Bees was earlier  tratement in August-September, 3* amitraz fumigation
> (12mg), total varroa drop more 1500.
> Colonies was normal typical size for wintering, one box dadant-blatt (8
> frame).
>

A bit more information is needed, such as the sequence of events.

Way back when, there was a treatment that always worked well because one of
the steps was to test for mite drop by using a proven pesticide. Once you do
that, all bets are off. We know Amitraz works so it is really all that is
needed.

But I may be assuming facts not in evidence, so that is the reason for the
request for more information.

Bill Truesdell
Bath, Maine

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