There’s no question that sometimes it’s necessary to call in bee exterminators. If bees are Africanized, the so called killer bees and are very aggressive it is probably a good idea to call a pest control company. A lady once called me to remove some bees from a tree which was right outside her front door. It transpired that her husband had been told by his doctor that his next bee sting might be his last. I felt that the only sensible thing to do was to call a local bee exterminator. It wasn’t worth risking the man’s life to save a colony of feral bees.
In some cases it’s possible to encourage a newly arrived swarm of bees to move somewhere else. I’ve blown smoke into a cavity with my bee smoker, as long as the bees haven’t established themselves in their new hive, the honey bee smoker sometimes does the trick.
If it’s found necessary to actually kill the bee colony I would not advise a homemade pest control solutions, however I would urge you to look for exterminators who use organic recipes for pest control. It might be possible to use an organic method. My wife swears by an electronic pest device to keep mice away. I’m not sure a sonic device would be effective for bees but I would hope a non-toxic extermination option would be available.
If all else fails and you have tried calling a bee removal expert it may come to the last result, extermination. Desperate situations call for desperate measures, something like an infestation of squirrels can be a huge pest which means you have to call a squirrel specialist.
I’m sure no-one in their right mind wants to kill an apparently healthy colony of honeybees, we need bees so desperately to pollinate the food we eat, however if a colony decides to invade a house I think an exception has to be made. I don’t kill bees, I don’t advocate this, but sometimes there’s really no alternative.