In a message dated 25/05/03 05:04:50 GMT Daylight Time, [log in to unmask] writes: Robin Dartington wrote << These can rebuild the population back to the treatment threshold over one year - unless suppressed with say thymol, or drone brood culling , >> So it's suppression rather than prophyllaxis. Chris :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::