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Subject:	Re: Widespread occurrence of neonicotinoid insecticides in streams in a high corn and soybean producing region, USA.
From:	randy oliver <[log in to unmask]>
Reply To:	Informed Discussion of Beekeeping Issues and Bee Biology <[log in to unmask]>
Date:	Wed, 30 Jul 2014 19:23:58 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (25 lines)

>The results for the 79

> water samples documented similar patterns among sites for both frequency of
> detection and concentration (maximum:median) with clothianidin (75%, 257
> ng/L:8.2 ng/L) > thiamethoxam (47%, 185 ng/L:<2 ng/L) > imidacloprid (23%,
> 42.7 ng/L: <2 ng/L).
>

These detects are something to monitor, but to put them in perspective,
even the highest level of clothianidin is far below the level that causes
observable adverse effects to bees, fish, crustaceans, or the few aquatic
insects studied.  The median levels are likely trivial as far as aquatic
ecosystems are concerned.


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

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