Article D1338-1 of the French Public Health Code
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.).