Reply to duali: Real science is about finding real answers. If there is no control group, then the real source of the deterioration in queen bees' condition would not be proven.  

Previous studies of bees show problems with workers not returning to the hive.  They found the queens still intact, but with only a few surviving workers.  Worker bees will "self destruct" if they are sick (they fly off) and they do not want to infect the other bees in the hive.