If I could bump this thread, I've a similar problem with a large colony. They were so bad yesterday that they followed me for a good half hour after the inspection. I dispatched the queen a week ago and went in yesterday to knock down queen cells. I had planned to take advantage of their queenlessness and strength to rear queens from my other hives, I'm now thinking that they're too aggressive to do much with....5 stings yesterday after wrapping myself up very well, about 20 on another occasion. Theyve also delivered stings 50 yards from the hive on a couple of occasions. None of my other colonies give any bother.
I'm planning on splitting them later....flying bees can return to where they were. Young bees will be split into 2 nucs with grafted cells in each and the donor frame can go to the flying bees to raise a queen.
I watched kevin inglin's video on euthanasing a hive...tbh mine look worse than his. I'm not relishing the thought of going back near them.