AJAP II – Environmentally friendly and sustainable control of the Asian bush mosquito

Asian mosquito (©James Gathany, CDC, Wikimedia)

The AJAP II project aims to assess the suitability of environmentally friendly measures to combat Asian bush mosquitoes. It also examines how the human population can be involved in the implementation of the measures and how they are accepted.

Research approach

The research project is divided into four work packages. In a first step, the efficiency of various environmentally friendly control agents (natural plant oils lavender and carnation, biological larvicide Bacillus thuringiensis israelensis, copper coins) will be tested in a large-scale outdoor experiment. On selected cemeteries in Hesse and possibly Rhineland-Palatinate, the occurrence of the Asian bush mosquito is monitored at regular intervals with the help of traps of attractants.

In the fight against a harmful organism, which aims to reduce the number of offspring, resistance to the substances used may develop over time. The second work package will examine over a period of three years which measures are most effective for a longer period of time and will not become ineffective after a short while due to a resistance developed by this particular mosquito species.

In order to implement the prevention and control measures, it is, however, crucial that the authorities as well as the human population accept those measures and show a willingness to help.

ISOE is responsible for the third work package, which uses quantitative and qualitative surveys to investigate how municipalities can be effectively integrated into the implementation of prevention and control measures and to what extent these measures are accepted within the human population. The findings from the three previous work packages will be incorporated into a framework for an integrated vector management system for the Asian bush mosquito. To this end, the various control measures are assessed in terms of their efficiency, sustainability, cost-effectiveness and acceptance in the human population and a promising combination of control and prevention measures will be discussed.


The Asian bush mosquito is an invasive alien species of mosquito that has spread over the last few years in the federal states of Baden-Württemberg, Bavaria, Hesse, Rhineland-Palatinate, North Rhine-Westphalia and Lower Saxony. It occurs primarily in human settlements, especially at the periphery of settlements, on cemeteries and in allotment gardens. Rain barrels or flower vases offer ideal breeding grounds for the mosquitoes’ larvae. The Asian bush mosquito is the vector of various pathogens, including the virus of Japanese encephalitis and the West Nile virus. There are currently no pathogen-specific drugs for both viral diseases. Infections can therefore only be prevented prophylactically. Hygienic measures reduce the likelihood of infecting humans or animals. The use of insecticides combats mosquitoes, but at the same time it has a damaging effect on the environment or poses a health risk for humans. In a predecessor project (AJAP), the insecticidal effect of different substances such as essential oils was identified. These are now to be tested outdoors.

Project partners

  • Senckenberg Biodiversity and Climate Research Centre SBiK-F (Head)
  • Goethe University Frankfurt am Main, Institute for Occupational Medicine, Social Medicine and Environmental Medicine

Contracting authority

  • Centre for Climate Change Hesse (FZK) of the Hessian State Office for Nature Conservation, Environment and Geology (HLNUG)


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Mehring, Marion/Ruth Müller/Axel Magdeburg/Markus Pfenniger/Friederike Reuß (2020): Gut vorbereitet. Wie Senckenberg und Partner umweltfreundliche Bekämpfungsmethoden gegen Stechmücken testen. Natur Forschung Museum 150 (1-3), 12-17

Reuss, Friederike/Aljoscha Kreß/Markus Braun/Axel Magdeburg/Markus Pfenninger/Ruth Müller/Marion Mehring (2020): Knowledge on exotic mosquitoes in Germany, and public acceptance and effectiveness of Bti and two self-prepared insecticides against Aedes japonicus japonicus. scientific reports 10 (18901)

van Dijk, Jiska/David Carss/Hans Keune/Suvi Vikström/Lucette Flandroy/Graham Rook/Tari Haahtela/Marion Mehring/Barbara Birzle-Harder/Friederike Reuss/Ruth Müller/Sandra Luque/Joao Garcia Rodrigues (2019): Invited background document on biodiversity and health for the Global Sustainable Development Report 2019 drafted by the Independent Group of Scientists. NINA Report, 1555. Trondheim: Norwegian Institute for Nature Research


2017/07 – 2021/05