Répartition de l’ambroisie par département 2021

L’ambroisie à feuilles d’armoise (Ambrosia artemisiifolia L) est une plante invasive originaire d’Amérique du nord. Son pollen, émis en fin d’été provoque de fortes réactions allergiques chez les personnes sensibles. C’est également une menace pour l’agriculture et la biodiversité (concurrence avec certains végétaux).

L’ambroisie est présent sur toute la région Nouvelle-Aquitaine. En 2021, 6 départements dénombraient plus de 50 observations d’ambroisies.

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