>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
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html