> >Chemical analysis of bee tissues revealed the presence of imida-
> cloprid (neonicotinoid) in 60% of the samples analysed and in an
> average concentration of 27 ng/g tissue.
>

That  works out to about 3 ng/bee.
The LD50 is about 40 ng per bee (this is the same as 40 ppb).

What surprises me is that this high level was found in the bees, what with
IMD having a half life in a bee on the order of 5 hours.  These bees must
have gotten into some really "hot" spots for IMD, since typical nectar or
pollen residues are only in the order of a very few ppb.

Randy Oliver

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