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Beehive Entrance reducer against hornets
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JONO-35413
Beehive Entrance reducer against hornets
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.99
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Anti-Asian-hornet and anti-European-hornet hive entrance that lets bees through but blocks predators. Two models: 378 × 36 mm for Langstroth/Dadant and 250 × 36 mm for nucs. Install from first velutina flights until frosts. Combine with traps to reduce overall enemy pressure.
Details of Beehive Entrance reducer against hornets
Hive entrance against Asian hornet (Vespa velutina) and European hornet that lets bees through but keeps predators outside. Available in two models: 378 × 36 mm for Langstroth/Dadant hives and 250 × 36 mm for nucs. The mechanical barrier that drastically reduces the pressure of Vespa velutina and European hornet during summer and autumn in affected areas.
🛡️ How it works — selective passage by size
The entrance has calibrated openings that let workers freely through (Apis mellifera, ≤ 5 mm height) but physically block velutinas and hornets (Vespa velutina and Vespa crabro are ≥ 7 mm tall). The predator cannot enter to steal honey or hunt bees inside the hive. The bees keep going in and out normally — foraging output is maintained while external pressure drops to a fraction of what it would be without the barrier.
📐 Two models depending on hive
378 × 36 mm: fits the standard entrance of Langstroth and Dadant (also many Layens and reversibles). The full-size adult-hive version. 250 × 36 mm: for narrower entrances of nucs, mating nucs and queen-rearing boxes. Specify the model you need when ordering. If you have a mix of hives and nucs in the same apiary, order both — the cost is marginal compared to the damage prevented from the velutina.
⚠️ When and how to install
Install as soon as you detect the first velutina flights over the apiary, typically from July in affected areas and until first frosts. A hive with velutinas hovering in front of the entrance stops foraging within days — foragers stop going out from fear and the colony enters paralysis. The anti-velutina entrance breaks that cycle. Combine with traps (Vetopharma, Beevital, ANEL funnel) to reduce overall pressure. It does NOT replace active control of the enemy — but protects the hive during the attack.
📋 Technical sheet
| Type | Anti-Asian-hornet and anti-European-hornet entrance |
| Models | 378 × 36 mm (hive) · 250 × 36 mm (nuc) |
| Compatibility | Langstroth · Dadant · Layens and reversibles · Standard nucs |
| Works against | Vespa velutina (Asian hornet) · Vespa crabro (European hornet) |
| Allows through | Apis mellifera (workers and small drones) |
| When to install | From first velutina flights until frosts |
| Combinable with | Vetopharma traps · Beevital · ANEL · Vespacatch |
| Important | Specify model (hive or nuc) when ordering |
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Reviews about Beehive Entrance reducer against hornets
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Pharmacist specializing in Beekeeping Health and Production. Doctorate from the University of Vigo, with expertise in Vespa velutina and its impact on apiaries.
Before applying this method, always check the health and strength of your hive. This protective approach is particularly effective for weaker hives, such as those lacking guard bees at the entrance.
However, avoid using this method in hives where bees are forming a "beard" (bees clustered at the hive entrance). This behavior is a natural defense against hornets, and additional protection in these cases could do more harm than good.
Practical tips to keep in mind:
• Regularly monitor and remove the reducer as needed to ensure adequate ventilation.
• Neglecting this step could result in dead bees and drones clogging the entrance, potentially causing the hive to suffocate.
Anti-Asian-hornet and anti-European-hornet hive entrance that lets bees through but blocks predators. Two models: 378 × 36 mm for Langstroth/Dadant and 250 × 36 mm for nucs. Install from first velutina flights until frosts. Combine with traps to reduce overall enemy pressure.