I got a call today from a man with a problem. Seems he's renting out a house, and on the property is a decent sized tree, with a very small entrance for bees to come and go. He says they've been there some time. He doesn't want to "gas them", but does need to get rid of them before he rents out the house.
I haven't seen it, but extraction sounds about impossible. I'm building the bee vac, it's about 3/4 done. Don't think that would help, either. The guy mentioned another beekeeper that thought perhaps a one way device, perhaps like what you use for honey supers.
Hmmm. Any ideas anyone?