Medhat, a question for you: You stated that "Vapour will settle on bees evenly." Could you please tell me the assay that you used to confirm this. I'm curious since I'm about to take samples of bees from various parts of the cluster to test for oxalic residues myself. -- 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