EN
In the counteract pathogenic fungi, alternative methods of plant protection are becoming more and more important, using both antagonistic microorganisms and vegetable active biological substances. The purpose of the work was to determine the effect of dried three plants on the growth and development of 8 species of phytopathogenic fungi, economically important (Botrytis cinerea, Fusarium avenaceum, F. culmorum, F. oxysporum, F. solani, Monilinia fructigena, Sclerotinia sclerotiorum, Trichothecium roseum). For fungi cultures, the method of poisoned substrates was used, in which macerates of plants in a concentration of 2% and 5% were added to the glucose-potato substrate (PDA). The experiment was carried out for two weeks in duplicate. The growth of mycelium and the ability to form spores were assessed. The research shows that plant additives have a different degree of impact on the studied phytopathogens. The most effective turned out to be cinnamon, which completely inhibited the growth of all the fungi examined. The presence of the antagonistic fungus Trichoderma viride has definitely influenced the development of the studied fungi. In all cases, the rapid growth of T. viridemycelium was noted and inhibition of phytopathogenic fungal growth