> Most bees these days have some hygienic traits due to mites and those bees remove diseased larva so fast in my experience I do not see the classic symptoms of EFB such as discolored larva. All I see is empty cells which should have larva in them. So what makes you diagnose this as EFB rather than, say, inbreeding or queen problems? Best wishes Peter 52°14'44.44"N, 1°50'35"W *********************************************** 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