The treatment would be applied when there is no capped brood in the hive when all mites are phoretic. Not to sure how well a oxalic dribble would work as the bees are active and not clustered very tight. Vapor may work better of a flash formic. *********************************************** 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