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Informed Discussion of Beekeeping Issues and Bee Biology

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From:
randy oliver <[log in to unmask]>
Reply To:
Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:
Sat, 25 Dec 2010 10:19:51 -0800
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>
> >So given the tiny amount of  clothiandin that would be
> applied per acre (assuming my math is correct) and the fact that
> the seeds would be buried it is hard for me to imagine how
> flooding of a field could result in puddles contaminated with
> biologically harmful amounts of clothiandin.


Paul, yes, when we speak of parts per billion, we are by definition speaking
of tiny amounts being biologically harmful!

I don't have time to cite right now, but I have seen studies that support
that seed treatments can move laterally.  Double planting portions of a
flooded field will double the dose.  The washout from equipment can result
in high concentrations.  Tenneke's data documents high concentrations in
some surface waters on farms.

So I think that it is safe to conclude that such concentrations do occur on
occasion, even if the vast majority of the treatments result in non harmful
levels to bees.

Randy Oliver

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