In Australia, this is often referred to as "Rothenbuhler syndrome". It is
said that these are resistant but I am not sure what to. I am unaware of any
tests that have been carried out.
I often wonder if this phenomen was associated with Rohenbuhler's AFB
resistant bees. Does anyone know?
I have had hives do this but only one or two in an apiary. I have a photo
somewhere of bees washboarding up the front of a hive.
Trevor Weatherhead
AUSTRALIA