There has been a lot of threads about aggressive bees, and the answer is always "requeen" so my question is, are they mean because of the Queens presents? if so I can see where she is gone and they change thier attitude.... But I would think that "mean" would come from the genes (the Queen or the Drone). so if this is true, it could take 2 months to get it out of the hive. say you kill the Queen today, she laid egg today ( using simple math) that egg emeges in 20 days and lives for 40 days thats 60 days before that trait is gone. so tell me where my thinking is wrong !