Requeen with young, swarm-resistant stock

Replace the existing queen with a young, mated queen bred from lines selected for low swarming tendency. Queens over 1-2 years old produce less queen mandibular pheromone (QMP), which weakens colony cohesion and increases the likelihood of swarm cell construction.

Why It Works

Queen pheromone output peaks in the first year and declines with age. A young queen floods the colony with strong QMP, which suppresses the workers' impulse to build queen cells. Additionally, some breeding lines (such as VSH or Buckfast-derived stock) have been specifically selected for reduced swarming behavior over many generations. Requeening annually or biennially keeps pheromone levels high and swarm tendency low.

Tips

• Purchase queens from reputable breeders who can document swarm-resistance in their breeding records
• Introduce the new queen in a candy-plug cage and allow 3-5 days for the colony to accept her scent
• Remove the old queen 24 hours before introducing the new one so the colony is queenless but not yet building emergency cells
• Requeening in late summer or early fall sets the colony up with a young queen entering the following spring, the peak swarm season