If you are unable to visit your hives regularly and you are concerned
about swarming, it's possible to delay swarming with a synthetic queen
mandibular pheromone.
An over-crowded hive can limit the transmission of the queen's pheromone
to all members of the colony. The queen's pheromone regulates colony behaviour
and cohesiveness.
A synthetic queen pheromone can overcome the effects of crowding by naturally
suspending a colony's urge to swarm for four to six weeks.
Note: Good hive management remains the best method for
preventing a swarm. Reliance upon external additives can become a habitual
practice that may supersede more appropriate methods.