The Asian hornet (Vespa velutina), native to Southeast Asia, has become a major concern in Belgium in recent years. Its presence poses serious ecological and economic problems, particularly for local bee populations and beekeepers. This article answers frequently asked questions about the invasion and proliferation of the Asian hornet in Belgium.

What is the Asian Hornet?

The Asian hornet is an invasive species that was accidentally introduced into Europe in the early 2000s. It can be recognized by its dark body, yellow legs and thin yellow-orange stripe on the abdomen. Asian hornets are slightly smaller than European hornets, but represent a considerable threat to local biodiversity.

How did the Asian Hornet arrive in Belgium?

The first sighting of the Asian hornet in Belgium dates back to 2011. The species spread rapidly from France, where it had been accidentally introduced in pottery shipments from China. In Europe, the Asian hornet has found a favorable environment for its proliferation, thanks to suitable climatic conditions and the absence of natural predators.

Why is the Asian Hornet a Threat?

1. Impact on bees : The Asian hornet is a voracious bee predator. It often ambushes near hives, capturing bees in flight to feed its larvae. This can significantly weaken bee colonies and reduce their ability to pollinate plants, affecting local agriculture.
2. Ecological problems : In addition to bees, the Asian hornet hunts other insects, disrupting local ecosystems. This predatory pressure can reduce biodiversity and alter food chains.
3. Risks for humans : the Asian hornet can attack en masse if it feels threatened, posing a risk to people close to its nest.

How to detect the presence of the Asian Hornet?

1. Direct Observation: Asian hornets are often seen around beehives, orchards and wooded areas. They have a slower, more stable flight than other wasps, making them easier to identify.
2. Nests : Asian hornet nests are often built high up in trees, but can also be found under roofs and in sheltered structures. They are spherical in shape and can reach a meter in diameter. 

What to do in case of detection?

1. Report Presence: If you spot an Asian hornet or a nest, it's crucial to report it to the local authorities or specialized organizations such as the Centre de Recherche Agronomique de Wallonie (CRA-W). Precise mapping of their presence helps to organize effective interventions.
2. Do Not Intervene Alone : Never try to destroy an Asian hornet nest yourself. Hornets can become very aggressive when defending their nests. Contact pest control professionals for safe treatment.
3. Prevention : Install hornet traps in spring and summer to capture founding queens. This can help reduce the number of nests in your area.

What control measures are in place?

The Belgian authorities have put in place several measures to control the invasion of the Asian hornet. These include active surveillance, nest destruction and public awareness campaigns. Research programs are also underway to better understand the behavior of this species and develop more effective control methods.

Conclusion

The invasion of the Asian hornet in Belgium is a serious concern requiring coordinated action between the authorities, beekeepers and the public. By remaining vigilant and reporting any sightings of Asian hornets, we can help limit their impact and protect our local biodiversity. For more information on pests in general, visit our website pestpatrol.be

Please do not hesitate to contact us if you have any questions or require assistance with Asian hornet management. Together, we can combat this invasive threat and preserve our ecosystems.