Nanetti et al looked at efficacy of trickling different OA concentrations under European circumstances: http://www.apimondia.com/apiacta/articles/2003/nanetti.pdf All the best,Lennard *********************************************** 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