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Subject:	Re: 86 ppb neonics found in wildflowers adjacent to
From:	randy oliver <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Fri, 16 Oct 2015 12:30:25 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (26 lines)

>
> >While I can see elevated levels in surrounding plants,  I see no way it
> couold exceed in this case by a factor of 8,  the level that was directly
> applied.
> Can you explain how this would even be remotely possible?


I've now had a chance to correspond with the authors at length.  There is
the possibility that there may have been planting dust on the hand
collected pollen (unfortunately they didn't take foliar samples).

The other explanation is that some plants bioconcentrate the residues in
the pollen.  There have been previous reports of this.  We clearly need
more testing to determine the extent to which various pollinator-attractive
species concentrate residues.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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