نبذة مختصرة : Marshmallow, coneflower, St. John's wort and sage, which grown in plantation, were the hosts of numerous fungi species that cause a variety of symptoms. A total of 34 species from 22 genera were determined. Some species pathogen on only one host (Puccinia malvacearum on marshmallow, Diaporthe eres and Seimatosporium hypericum on St. John's wort), while others were present at all examined hosts (species of the genus Fusarium are present in all examined hosts). The most abundant species in the seed was Alternaria alternate. The percentage of contaminated seeds ranged from 5% to 69%. Fusaium species were isolated from 2.5% to 29% of seeds, depending on the host and year. From the root of the studied medicinal plants seven species of Fusarium (F.graminearum, F. oxysporum, F.proliferatum, F.semitectum, F.solani, F.subglutinans and F.verticilioides) and one of the genus Sclerotinia (S.sclerotiorum) were isolated. Thirteen fungi species belonging to 10 genera were isolated from stem, leaves and flower of medicinal plants.
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