What we're finding is than non crop vegetation on the field margins tend to concentrate residues in their nectar and pollen to a degree greater than the crop plants. Any links or papers to show this?? 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