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Swarm Prevention Strategy: Methods and Control Techniques

Mastering the swarming instinct is the key to maintaining high apiary productivity, requiring an understanding of bee colony physiology and the timely application of biological and technical methods.

1. Aetiology of the Swarm Impulse: Why Do Bees Swarm?

Swarming is a natural reproductive process of bee colonies, evolutionarily programmed for the survival of the species. This state does not appear suddenly, but results from the accumulation of specific factors inside the hive:

  • Excess royal jelly: In strong colonies, the number of worker bees (nurse bees) quickly outpaces the queen’s egg-laying rate. A surplus of royal jelly builds up that the bees have no one to feed, stimulating them to build queen cells.
  • Overcrowding and lack of space: The absence of free cells for egg laying and no room for nectar storage paralyses the colony’s activity.
  • Queen age: Older queens (2–3 years old) secrete fewer pheromones, which weakens colony cohesion and favours the initiation of the swarm impulse.
  • Thermal conditions: Overheating of the hive (poor ventilation, exposure to full sun) drastically accelerates swarming.

2. Diagnosing the Swarm Impulse

Early recognition of symptoms allows for effective intervention before the colony enters the “swarm fever” phase, in which traditional methods fail.

  1. Appearance of drones: This is the first signal of preparations. Bees build drone comb and raise males.
  2. Construction of queen cups: The beekeeper finds empty cups on the edges of the combs.
  3. Eggs laid in the cups: The critical moment. The queen, under pressure from the workers, lays eggs in the cups, and after 3 days the workers fill them with royal jelly.
  4. Reduction in activity: Bees stop building new comb (foundation), and scout bees form so-called “beards” at the entrance or hang idly inside the hive.

3. Preventive Methods (Prophylaxis)

These measures should be taken before occupied queen cells appear.

  • Timely expansion of the brood nest: In a multi-box hive, an entire box of foundation and drawn comb is added. In a long hive, the nest is shifted towards the entrance, and 4–5 frames of foundation are added behind the last brood frame (so-called “nest relief”).
  • Heat management: On hot days, ventilation should be increased by opening all entrances or raising the hive body by 10–20 mm using wedges.
  • The “continuous building” principle: Regularly providing frames of foundation forces the bees to secrete wax, which consumes energy and royal jelly.

4. Technical Countermeasures (Creating Nucleus Colonies)

When a colony is very strong (brood on 8 or more frames), the most effective approach is the artificial removal of some bees and brood.

Instructions for creating an anti-swarm nucleus:

  1. 2–3 frames of sealed brood are removed from the colony along with the bees covering them.
  2. Securing the queen: It is absolutely essential to confirm that the old queen has remained in the parent colony.
  3. Adding food: 1–2 frames of honey and pollen are added to the nucleus.
  4. Housing: The new small colony is placed in a nucleus box, insulated, and after a few hours a new queen (or a ripe queen cell) is introduced.
  5. Effect: The parent colony is biologically weakened, which usually immediately interrupts the swarm impulse.

5. Advanced Methods for Combating “Swarm Fever”

If queen cells with larvae are already present in the hive, simply removing them often does not help. More drastic methods must be applied:

  • Demaree Method (Siemens-Demaree): This involves separating the queen from the brood within the same hive. The queen, with one frame of open brood, is left on foundation in the lower box, while the rest of the brood is moved to the upper box, separated by a queen excluder. The bees feel as though they have swarmed and begin building a new nest.
  • Taranov Method: This involves shaking the bees onto a board (1 × 1 m) placed 15–20 cm in front of the entrance. Swarm-ready bees will cluster beneath the board (forming an artificial swarm), which the beekeeper then hives in a new box.
  • Shook swarm with queen: The old hive is moved to one side and a new one with the queen and a few frames of drawn comb is placed in its original position. All foraging bees return to the original location and to the new queen, losing their desire to swarm.

Key Points to Remember:

  • Critical threshold: more than 8 frames of brood in a standard 10–12 frame hive.
  • Nucleus size: a minimum of 3 frames (2 with brood, 1 with food).
  • Temperature during transport to the foraging site: do not allow it to rise above 35 degrees Celsius (triggers swarm panic).
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