My second year, my father in law recommended that I use Mitaway II to kill SHB that that year were out of control. (I killed thousands of them in the oil trays in every hive every month.) I set up one empty hive away from my hives with the perscribed amount and left it as directed. When I opened it up, I had a large hole in the SBB and the STB. I never used it again.
As a matter of fact, if anyone wants the rest of it and is in the area, it is yours.