The species whose proliferation constitutes a threat to human health are as follows:
1° Mugwort ragweed (Ambrosia artemisiifolia L.) ;
2° Smooth ragweed (Ambrosia psilostachya DC.) ;
3° Common ragweed (Ambrosia trifida L.).
4° The oak processionary (Thaumetopoea processionea L.) ;
5° The pine processionary (Thaumetopoea pityocampa L.).