>>I was always under the impression that when OA was first tested in
Switzerland by Imdorf Anton and the original 112 test colonies in
1994 & 1995 the OA solution used was 30 grams of hydrated OA desolved
in one litre of water.
An Italian study compared OA in pure water and in 2 different
concentration sugar water solutions. The OA sugar water solutions
resulted in higher varroa kills. It's either because the sugar water
solution stuck better to mites/bees or was more eagerly ingested by
the bees.
Waldemar
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