–Six species of phytopathogenic micromycetes, Alternaria alternata, Botrytis cinerea, Fusarium oxysporum, Rhizopus stolonifer, Мucor hiemalis, and Trichothecium roseum were detected during 24-day experiment on microclonal propagation of three Aristolochia species (Aristolochiamanshuriensis, A. contorta, and A.clematitis). All these pathogenic species were found on A. manshuriensis explants, whereas only three of them (Alternaria alternata, Botrytis cinerea, and Мucor hiemalis) were found on Aristolochia contorta explants and two (Botrytis cinerea and Мucor hiemalis) were identified on Aristolochia clematitis explants. Development of Alternaria alternata and Fusarium oxysporum on Aristolochia manshuriensis explants (37 and 24% of total explants amount, respectively), as well as Alternaria alternata growth on Aristolochia contorta (28%), and Мucor hiemalis (10.8%) and Botrytis cinerea (4.2%) on Aristolochia clematitis were registered during two weeks of cultivation. On the third week, Botrytis cinerea was detected on Aristolochia manshuriensis explants, and Мucor hiemalis was found on Aristolochia contorta and A. clematitis explants.
