How the queen drone attracts drones?

Insects Facts-

Queen bee.

How are the drones attracted from miles around to pursue the queen bee? 

Investigations have revealed that the sex attraction is from a “perfume” in the mandibular glands located in the queen’s head. 

Studies have, showed that the drones would even be attracted to a dead queen bee as long as the “perfume,” called queen substance, was present. 

This substance has been synthetically produced, and it also attracts the male bees.