Moggett
House Bee
Dr Jamie Ellis was recently in the UK talking about SHB. He went from the University of Florida to South Africa to study the beasties in their original habitat, so has more than passing aquaintance. He tells of some live specimens they had in their second floor lab (IIRC). Returning one morning they found larvae crawling all the way down the concrete stairs and out the door seeking ground to pupate in. In practice, a) a good stretch of concrete is not a barrier and b) they usually set off under cover of darkness.
Concrete under the hives would have to be as wide as a major runway to have much effect, and chickens might pick off some but most will get past in the dark.
I'm paraphrasing as I recall it but his general message was that, in the US at least, beekeepers have learnt to live with SHB. They do well in warmer climates with moist soil. While we in the UK can provide moist soil they're actually likely to be more of a problem long term in Italy. Much as they're a greater pest in the southern US states such as Florida and Georgia than they are further North. What beekepers in the US do is keep numbers down with one or more of various traps sold commercially or home made, you can see them listed by US based suppliers like ML. Keep the empty space in the hive down to a minimum and the bees can keep limited numbers of beetles under control themselves.
BTW: Latest Italian numbers show a few more detected as of 21 Nov, extending the Southern boundary of the original outbreak area in Calabria. Still only the one apiary in Sicily. http://www.izsvenezie.it/index.php?...al-situation&catid=119:-beekeeping&Itemid=893
I wonder if a raised lip around a concrete stand would work, can they climb up vertical barriers?