[Ragweed and public utilities]

By virtue of their role as contractors of road building and town planning, the public utilities are often responsible for the proliferation of ragweed. Two concrete examples illustrate the various different factors on which the effectiveness of this campaign depends: awareness of the phenomenon, the ability to recognize the plant, the determination to contact land-owners, and the implementing of a correct action strategy which must not only eradicate the plant temporarily but also prevent it from spreading.