>Dave , do you have any measured amount and do you have a source you have found to get a bulk amount Ascorbic acid can be bought by the kilogram, old numbers ~$20/kg Measured amount depends on circumstance. (ie how bad is the ccd AT THIS POINT) I'd say range is 10-20gm/hive/yr, maybe more if wintering in south (?20-30gm?) I have not ever fed more than 2.5 gm at one time (usually 1+ gm/hive) Mostly fed via top bar drench, 10 gm/litre, 6-10 hives/l >and the bees seem to prefer syrup with it in My impression is that bees also seem to prefer VC I had planned a test, life intervened and it fell by the wayside dave *********************************************** 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 Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm