The abundant precipitation recorded in Provence during the months of March and April 2025 created ideal conditions for the proliferation of mosquitoes, especially in coastal wetlands. The Mediterranean Interdepartmental Demoustication Agreement (EID) observed a significant increase in mosquito populations.
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The tiger mosquito can transmit diseases like chikungunya, dengue and zika. It is born and reproduces mainly around homes, in small water points. The regular elimination of the laying places of the mosquito is the most effective way to curb the proliferation of mosquitoes, protect themselves from their bites and the diseases they can transmit. With the strong precipitation, unusual months of March and April, and the temperatures that begin to go up, the proliferation of worried mosquitoes.
The first quarter of 2025 was marked by successive rainy episodes. These conditions have favored the hatching of eggs of the species Aedes detrital in wetlands, a particularly aggressive species between autumn and spring. Mosquitoes from these environments can travel several kilometers, reaching urbanized areas and causing nuisance for populations.
Aline lives in Marseille in the 12th “It is worse in worse mosquitoes, we can no longer get rid of them, they resist anti-mosquito sprays, there are even hours at the end of the day, where we barricade ourselves “.
Same fight for Clément, in Plan-de-Cuques, “We no longer know what to find as a parade, we tried to dine under the mosquito net installed outside, but they manage to find the fault. We are attacked anyway.”
Inès, she, tells how in spite of herself, her son of a few months was pricked more than a dozen times on his face, “he was in his cozy, on the terrace next to us and I put the mosquito net to protect him. But there must have been a mosquito trapped in it. It is the disaster, after his nap, I discovered it with the fellow of multiple bites, Like that to the mosquito by believing to do well “.
Gérald employs him the big means, “we draw an extension and put fans around the table outside to be able to enjoy our meals whether at noon under the shadow of the plane trees or in the evening”.
If some have tried to find anti-mosquito bounds in the trade, the result is not convincing. “You have to invest, and buy an effective real terminal, but it costs several thousand euros, why not ask the condominium to invest, Reflect Julie.
Pascal Eberhart, head of the Saint-Chamas de l’Eid operational agency, stresses that without the rains that occurred until April, the proliferation of mosquitoes would have been less.
“After a period of lull, the risk of feeling of nuisance linked to rural mosquitoes increases again with the return of better climatic conditions and could last in certain places with the contribution of residual adult mosquitoes resulting from the latest hatching”, Indicates the EID on its site.
In the Bouches-du-Rhône: “20 ha have been treated in recent days “, Details the EID. “”The level of mosquito populations in urban areas has dropped and even if in general, mild temperatures and the slight sea wind in the afternoons constitute good conditions for females in terms of aggressiveness and displacement, the main risk remains outside agglomerated areas like in Port-Saint-Louis-Rhône “, add the institute.
“The water levels south of the two municipalities of Port Saint-Louis du Rhône and Arles/Salin de Giraud have significantly lowered certain rice fields begin to be irrigated north of the town of Salin-de-Giraud”, specifies the EID in its latest published bulletin.
The EID Méditerranée regularly publishes “Mouteo mosquito” bulletins to inform residents of the risk of nuisance in their commune. These bulletins, based on prospecting carried out in wetlands, use a color code (green, yellow, orange) to indicate the level of risk. In addition, free training is offered to communities to make them aware of mosquito control strategies, including mosquito-tiger (Aedes Albopictus), potential vector of diseases such as chikungunya, dengue or zika.
The health agency identified, in 2024, 200 cases of infectious diseases transmitted by the mosquito in Provence-Alpes-Côte-d ‘Azur. The Regional Health Agency (ARS) launches its “zero mosquito” plan. ARS PACA offers communities to participate in the event by implementing simple information of information, awareness, and fight against mosquito with users of the municipality.
Citizens have a crucial role in playing in the fight against mosquitoes. It is recommended to eliminate stagnant waters around homes, as in flower pots, buckets or obstructed gutters, which are privileged laying places for mosquitoes. Particular vigilance is necessary to prevent the proliferation of mosquito-tiger, which is mainly installed in urban areas.
