"Peter Edwards" " I am wondering if there has been any research into the susceptibility of colonies to viruses, particularly those causing problems when vectored by varroa". Prof Mark Winston, Simon Fraser University, has lectured in Uk showing he has reserched variation in the level of varroa that kills colonies depending on level of virus. Google gives 378 hits for Mark Winston Varroa - somewhere in there......? Can anyone point closer? Robin Dartington :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::