I've got some hives loaded with SHB's. I've tried the sandwich container traps and they work really great, but I've still got lots and lots of SHB's (they seem to call to all their friends to come join the party).
So, as I'm grasping at straws and anything that might work, I tried sumac berries in my smoker because they work on varroa mites (I've used sticky boards to count the mites before and after smoking with sumac berries, and to count the mites in non-smoked hives as a control).
The bees hate the smell, and the berries burn a nice white smoke, acrid, with a tinge of yellow. I smoked my infested hives and the bees fan their wings with a low roar. The SHB start evacuating through every crack and opening.
Now, will they return? Will I send them to another location?