The situation in the population of the sunflower downy mildew pathogen in some regions of the Russian Federation
Downy mildew Horse Show Sheets is one of the most spread and harmful diseases of sunflower (Helianthus annuus L.).The aim of the study was to determine the races of the pathogen of the disease of the oomycete Plasmopara halstedii (Farl.) Berl.et de Toni in several regions of the Russian Federation (the Republic of Adygeya, Krasnodar Krai, Stavropol