PPB. Does anyone know how these concentrations of imidacloprid compares to what the bees gather I the field in areas of imidacloprid application? http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0029268 ReaD close, decent study! The highest number I have ever seen that I recall is 46 ppb, and when that hive was resampled it showed zeros 4 weeks later. Charles *********************************************** 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