Pete, I'm not understanding. Were your virus tests for a yard average, or for that specific hive? A 5% infestation 4 weeks after a good mite treatment strongly suggests that the mite count was rather high prior to treatment, which was my only point, since a high mite infestation rate typically leads to a DWV epidemic in the hive that takes some time to clear, even if one has reduced the mite infestation rate. -- 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