We tried food preservatives, some of which are used some pollen substitute/supplements. See "https://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?A2=ind1002C&L=BEE-L&P=R268&X=OFE78CBF7BA79289FB5" and search for sorbate at "https://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe" for more related threads *********************************************** 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