Queen excluder with a bamboo frame to separate the brood box from the super. Its openings allow worker bees to pass through whilst restricting the queen’s access, so that the frames above can remain free of eggs when colony management warrants the use of a queen excluder.
The queen excluder measures 51.5 × 43 × 1.5 cm. The Dadant and Langstroth boxes vary in length, width and support depending on the country and manufacturer; some French Dadant units are shorter than this part. Measure the outside of the brood box and the usable support beneath the super. It must lie flat, without protruding or leaving a gap at the side.
The visible corners are reinforced with metal fittings. If the excluder is too large, dismantling it or cutting the sides may weaken the frame and alter the spacing between the bars. The safest approach is to choose one where the dimensions fit; do not attempt to correct a size mismatch afterwards with an improvised cut.
Fit it when there is sufficient population and flow to utilise the super. If traffic slows down, check the propolis, wax bridges, colony strength and available space. The excluder also retains most drones; avoid leaving drones trapped above with no way out. Remove it when it no longer serves a specific purpose in your management.
Carefully scrape off wax and propolis, resting the frame on a flat surface. Do not leave it to soak or store it whilst damp. Before each season, check that the bamboo is not warped and that all the slats maintain a uniform spacing.
| Main material | Bamboo |
|---|---|
| Dimensions | 51.5 × 43 × 1.5 cm |
| Visible reinforcement | Metal corners |
| Compatibility | Only for boxes with a base measuring 51.5 × 43 cm; not universal |

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