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Date: | Thu, 14 Jan 2021 21:28:18 -0700 |
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Dan, All the usual oils were tested, but menthol crystals (NOT coughdrops)
were the only thing found to be effective and registered for A.woodi. I
still have a ball of mentholated propolis that I meant to market . . .
Grease patties helped, but I don't know whether they actually got
registered. I did some of the testing of formic with Bill Wilson and James
Baxter (RIP to both) for A. woodi. It was very effective.
Jose et al., My hypothesis as to the decline of A. woodi is that it came
into being as a variant/subspecies/hopeful monster of one of the other
external Acarapis mites, all closely related. It found a clever hidey hole
and thrived there in reproductive isolation and maybe even speciated. For
a while. It wasn't a very good parasite however because it killed its host
in winter when further dispersal wasn't possible. Everything died. That
was pretty strong selection against the variant. I don't think honey bees
are in any way resistant. Even if they were, they aren't now because
there's virtually no selection pressure. They do prefer more humid
environments and I believe that's where they're occasionally found now.
I've looked at lots of bees from suspicious winter deadouts and not seen
any since being in Colorado (15 y) Then came varroa . . .
Cheers,
Kristina Williams
Longmont, CO
USA
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