>I treat with OA Vapor once in spring, once if I split hives. 3x5 in August and October and once in November. Bill, Does that add up to 9-10 total with no observed ill effect? The idea that the trouble could be coming in with even mite free bee immigration opens a whole new can of worms. Thanks for even more sleepless nights. Paul Hosticka Dayton WA *********************************************** 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