24 Jun '14 00:41>1 edit
Originally posted by Sicilian SausageTry using orthoboric acid... it's an undetectable form of boric acid. Insects will go out of their way to avoid boric acid unless you are able to mask its odor. It's used to kill ants and cockroaches, and only a handful of bees would need to be exposed to it for the chemical to reach the queen.
So, how do I keep getting tham in my flat? I don't have any windows open and I haven't answered the door to any. How on Earth do they get in?
I've never used it to kill a bees nest because it takes at least a week to do the job... in the meantime the little buggers might act like they've lost their little minds, running around in circles and not acting at all like they usually do. So if you don't mind experimenting to see what murderous crazy-ass bees act like for the better part of a week, that just might be your best bet.
I don't know what the little buggers might do to you and your neighbors before they all kick the bucket, but I guarantee it will do the job... eventually. Like I said I've never tried it on a bees nest, so I have no idea what (if any) unintended consequences there may be.