First Report of Phyllachora ambrosiae in Europe Causing Epidemics on Common Ragweed.

@article{Vajna2000FirstRO,
  title={First Report of Phyllachora ambrosiae in Europe Causing Epidemics on Common Ragweed.},
  author={L{\'a}szl{\'o} Vajna and G. Boh{\'a}r and Levente Kiss},
  journal={Plant disease},
  year={2000},
  volume={84 4},
  pages={
          489
        }
}
Common ragweed (Ambrosia artemisiifolia var. elatior (L.) Descourt.) was introduced to Europe from North America during the nineteenth century. Since the early 1990s, it has become the most widespread and most important allergenic weed in Hungary. In July 1999, during the annual survey of fungal diseases of ragweed in Hungary, plants exhibiting irregular brown spots surrounded by yellowish halos with small black spherical bodies on the upper surface of leaves, especially along the vessels, were… CONTINUE READING