In message <09c601c3d17f$87fcf6a0$7604c518@gollum>, James Fischer
<[log in to unmask]> writes
>A long-term (and still ongoing) study on a reasonably large number of
>hives at several apiaries by Dr. Wyatt Mangum of Virginia, USA was
>said by Wyatt last summer to show that reinvasion (or "inter-colony
>drift", if you will) IS the apparent primary means for spreading varroa
>between hives.
I think we are using the word re-invasion here in two ways. I understand
it to mean a new invasion (large numbers) from other colonies, once you
have reduced numbers by treatment (hence the "re" "and invasion"),
either from robbing or absconding/breakup of overloaded colonies. This
often happens in autumn, hence the idea of re-invasion and well defined
by Peter as such. Drifting will tend to equalise mites between colonies
in an apiary.
--
James Kilty

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