Oz shows no sign of CCD, Oz has IAPV but no varroa.  Canada has Oz bees, varroa and shares a long border.  This begs some questions, if I'm any judge.  Canada has had bees from Oz longer than US why didn't CCD show up in Canada first?  Are varroa less widespread in Canada than in the US?  Are commercial Canadian beekeepers more stationary than their US counterpart? Are Canadian bees less "stressed"? (i.e. more into honey production and less into pollination and hence less miles trucked less frequently, less pesticide exposure, etc., etc.  Has anyone "sliced and diced" the data to reflect (confirmed) CCD in stationary versus migratory outfits?
Pettis is telling you something, is anyone listening?  You should be looking for the whole "chain", not the "weak link du jour" 
I haven't been reading my "mail" as often as I should so this may be a dated rehash, if so, sorry  

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