The study of phytophages and phytopathogens adapted to invasive species Solidago canadensis L. and S. gigantea Aiton (Asteraceae) was carried out in 2021–2023 in the Moscow, Tver and Kaluga regions. Identification of the collected samples was carried out in the plant protection laboratory of Main Botanical Garden named after N.V. Tsitsin of Russian Academy of Sciences. It was revealed that polyphages with a wide floral spectrum in the feed base predominate among phytophages. On S. canadensis and S. gigantea, 11 phytophage species were noted, occurring sporadically and not causing serious damage to plants. Both invasive species of Solidago L. are affected by powdery mildew Golovinomyces asterum f. solidaginis U. Braun, which is a synonym of Erysiphe cichoracearum f. solidaginis Jacz., noted earlier in Russia. The causative agent of rust was not found.

A.G. Kuklina, O.A. Kashtanova, A.V. Stogova, O.B. Tkachenko