The Office of Environment has published the final report on the monitoring of invasive mosquitoes in 2024. The monitoring has been carried out in Liechtenstein between June and September since 2017. Three invasive mosquito species have been described in Switzerland to date: the Asian tiger mosquito, the Asian bush mosquito and the Korean bush mosquito. All three species originate from Asia. The problem with these mosquito species is that they can potentially transmit viruses such as the dengue, Zika or chikungunya viruses. There have never been any cases of transmission in Switzerland or Liechtenstein. They can also displace native mosquito species and are more annoying than these, as they are also active and bite during the day.
no tiger mosquitoes found in 2024
Only the presence of the Asian bush mosquito (Aedes japonicus) was detected during the surveys carried out in Liechtenstein in 2024. However, the bush mosquito is very present in the valley area of Liechtenstein. In 2024, both the number of eggs detected and the number of positive traps per trap site were higher than in any other year since measurements began. This also applies to the average number of eggs found over the entire season. Once again this year, the high rate of positive egg-laying traps at the start of monitoring was striking. This could have been the result of the rather wet weather in spring and early summer up to the first week of July.
The final report is available on the Office of Environment website at: www.llv.li/de/privatpersonen/freizeit-umwelt-und-tierhaltung/wald-natur-landschaft-klima/neobiota
Press contact:
Office of Environment
Oliver Müller
T +423 236 64 09
[email protected]
Office of Environment
25.10.2024