+1 ...but .. SHB can be countered without chemical interference - there are nematodes that are sprayed on the soil around the hives which are proving very effective and strong colonies are very capable of repelling this nasty little pest - a bit like the wax moth ... USA has suffered a lot from SHB but when you look at some of the beekeeping practice in the US it's a wonder that honeybees survive at all. There are also a variety of beetle traps that have been reasonably successful.
I suspect that, if and when it arrives here, there will be the usual panic but hopefully beekeepers, in the light of the aftermath of the early days of varroa and the resistance to chemical treatments that occurred, will be a little more measured in what has to be done to counter the threat.
Hopefully the Italians will get it under control and stop the spread. Just like some of the tree deseases I wouldn't be surprised if it didn't arrive with imported plants/soil from an infected country.