["Ambroisie, la Fleur du Mal." A 13-minute video program on ragweed]

A video-type of 13 minutes shows the plant in the land scape of the Middle Rhone-area, near Lyon in France, where over the last ten years Ragweed (Ambrosia) has spread considerably. The film shows also the material for catching pollens, and how to destroy the plant. Are concerned, physicians and communs authorities.