Health Tiger mosquitoes are already here: all of Occitania on...

Tiger mosquitoes are already here: all of Occitania on the alert

France sees red. But this time because of the tiger mosquito. The information site Vigilance-Moustiques has just published its 2020 map of the presence of tiger mosquitoes in France. And the mapping is cold in the back. Six new departments are placed this year in red vigilance, that is to say that the tiger mosquito is officially established and active there: Charente, Cher, Loire Atlantique, Yvelines, Deux Sèvres and Vienne, proof of the proliferation of the tiger mosquito. which is gaining ground each year.

These departments are in addition to the 57 departments where the tiger mosquito is already declared officially established and active, ie more than half of the territory. In Occitania, all the departments are already on the alert. 10 French departments are on orange alert (the mosquito has been punctually intercepted there in the past 5 years) and 29 others on yellow alert (which are the subject of an entomological watch).

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Already bites in Aude and Hautes-Pyrénées

The tiger mosquito is implanting more and more on the French territory but it also strikes more and more early. “After a relatively mild winter and a warmer start to spring, the mosquito season has already started a few days ago. This year, we are seeing an earlier, sharper and wider start, with 89 departments already concerned, ie almost -the whole territory. In addition, the first unusual proliferations and stings (departments in orange alert) appeared much earlier in the season this year compared to 2019 where they appeared at the end of May and in June “, note the researchers at Vigilance Moustiques.

This year, residents have already been bitten in nine departments: Alpes de Haute Provence, Aube, Aude, Cantal, Hautes Pyrénées, Haut Rhin, Tarn, Vienne, Territoire de Belfort.

As a reminder, three main factors determine the quantity of mosquitoes in a region: a mild winter (eggs laid before winter can thus survive until spring), abundant rain with an accumulation of standing water and several consecutive days of heat (23 ° C during the day and 15 ° C at night) which allow the eggs to develop into larvae. In France, these conditions, consequences of global warming, have been met for several years.

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