INTERRELATIONS BETWEEN SYRINGA PLANTS AND PHYTOPATHOGENS IN SIBERIA

Abstract

Background. The article presents the results of many research’s years on leaf pathogens Syringa josikaea Jacq. and S. vulgaris L. in the urban environment and collections of Siberian arboretums. The biology, morphology and symptoms of 6 phytopathogens are given: Erysiphe syringae Schwein., Heterosporium syringae Oudem., Septoria syringae Sacc. & Speg., Ascochyta syringae Bres., Cladosporium herbarum (Pers.) Link, Alternaria alternata (Fr.) Keissl., Leptoxyphium fumago (Woron.) R. C. Srivast. Materials and methods. Phytopathological studies of plants of Syringa L. were carried out in 5 Siberian cities. Identification of pathogens was carried out by standard methods. Results. In Siberia, differences in the manifestation of symptoms and morphology of individual pathogenic micromycetes were established. It has been proven that the powdery mildew pathogen stably forms a telemorph in Siberia, in contrast to the European part of Russia. The significance of the features of the fungus development cycle in specific conditions is shown for the development of a system of measures to limit its spread and harmfulness. Conclusions. It was found that the formation of pathogenic mycobiota on lilacs in Siberia is carried out in two ways: the transfer of pathogens together with plantsintroducers to new territories and the transition of saprophytic fungi to optional parasitism.

Keywords

• pathogen-host relationship
• foliar pathogens
• fungi
• syringa
• siberia
• arboreta
• cities