Regarding thymol and other essential oils. http://www.apis.admin.ch/english/Themes/Varroa.htm and http://www.apis.admin.ch/english/pdf/Varroa/essential_oil.pdf are worthwhile reads. allen http://www.honeybeeworld.com/diary/ :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::