Hi Randy > Dr Martha Gilliam, US ARS also had success at breeding resistance. BTW, > there are several mechanisms for resistance. Interesting, I have never paid much attention to chalk brood myself, but I hear a lot of complaints about it among some strains of AMM, my pet theory at the moment is that this is due to a flaw in the selection criteria used, but I would like some guidance on where to research the mechanisms for resistance that you mention. -- Regards & Best 73s, Dave Cushman, G8MZY http://melliferabees.net Email: [log in to unmask] Short FallBack M/c, Build 7.21/2.01 Son of ORAC M/c, Build 5.o1/2.o1 *********************************************** 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 Access BEE-L directly at: http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?A0=BEE-L