According to articles included in _New_Perspectives_On_Varroa_ available from IBRA, mite trapping via drone comb removal is an effective albiet labor intensive tool to combat varroa mites. Seems to me it's one of those methods that works well for hobbiest but not so well for commercial operations. I guess it works well for those beekeepers willing to invest the time and effort. Aaron Morris - I think, therefore I bee!