>I > am currently trying to fathom why drone brood trapping does or does not
> work,

To my surprise, I often find few or no mites in the drone brood of my
trap frames.

>The chief drawback to biocontrol in this area seems to be
> the heavy re-infestation that apparently occurs in late summer as bees enter
> crashing hives

When I developed my mite population spreadsheet, this variable kept
coming up as the most important thing in mite control.

Randy Oliver

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