With spring, incentives for trapping so -called “Asian” hornets are multiplying. We take stock of the methods and risks.
THE so -called “Asian” hornets are subjects, especially in the spring, to vast campaigns who call for their eradication. This concerns more particularly the species Velutin wasp, the yellow -legged.
The yellow leg hornet is a Involuntarily introduced species in France and who quickly was there acclimatized. It should not be confused with the European hornet (Vespa Crabo) which is a native species perfectly integrated into the balance of Local ecosystems.
The yellow leg hornet is a very active predator which has a particularly significant impact on domestic bee farms (Apis mellifera). For beekeepers concerned, amateurs or professionals, the arrival of this hornet is a real scourge which can destroy all their efforts (and threaten their economic activity).
Trap Asian hornets?
Thread by needle, the bad reputation Asian hornets has led to harmful approximations To really understand the problem. Sometimes presented as a destroyer of pollinators, its proven impact is above all linked to the production of honey.
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Pesticides are much more worrying about thefuture of pollinators which are much more diverse and numerous than simply domestic bees. However, many publications encourage trapat home, Asian hornets.
This is the case, for example, of the account @joanna_family_ Who explains how to garnish a trap with current ingredients of the kitchen. It would be enough for this to mix grenadine, variegation and a little white wine before pouring this preparation in a trap purchased commercially.
THE yellow legs, attracted by this sweet mixture, enter the trap and end drowned, unable to get out container. Unfortunately, this type of approach has Nothing selective. Many Other speciesabsolutely harmless, but also precious for biodiversity (and pollination) suffer the same spell than hornets (wasps, diptera, etc.).
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The recommendations of experts from the National Museum of Natural History
L’collapse of insect populations must encourage us to review certain approaches. The generalized trapping of Asian hornets is, according to specialists, a risque More than a solution. THE Punctual interventions To protect by spacing or sensitive sites (schools, etc.) must be led by professionals.
The National Museum of Natural History has highlighted several studies which show that trapping represents only 25 % success rate. It means that 75 % other species killed by this approach are not not Asian hornets.
Thus, scientists strongly advise against eradication campaigns With non -selective traps. L‘impact On pollinators and insects in general, could be much more harmful that the presence of the yellow leg hornet. You might as well keep grenadine to quench your thirst this summer!
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