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Downy mildew of sunflower, caused by Plasmopara halstedii (Farl.) Berl. et de Toni, is one of the
most important diseases of sunflower. There are several pathotypes of the pathogen and the number
The parasitic broomrape (Orobanche cernua) is one of the most yield-reducing factor of sunflower production world-widely as well as in Hungary.