First Report on the Increased Distribution of Pathotype 704 of Plasmopara halstedii in Hungary. Plant Disease 98 (11): 1580.

Downy mildew of sunflower caused by Plasmopara halstedii (Farlow) Berlese et de Toni is a devastating disease worldwide.

The treatment of seeds with fungicides and the use of resistant cultivars are widely employed control measures against this oomycete. Effective protection, however, may be hindered by the high genetic variability of the pathogen

http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-09-13-0920-PDN