Ways to increase the resistance of lilacs to fungal and bacterial diseases

Ornamental shrubs are always at the center of horticultural interest. The 21st century was marked by a new stormy interest in the culture of species, varieties and forms of the genus Syringa. New breeding centers have appeared and a significant number of new varieties are registered every year. There are new nurseries, the range of which is expanding every year. The number of amateurs is increasing, which greatly contribute to the promotion and introduction of these beautiful plants into urban floristry. The 21st century was marked by a "boom" in lilac. Currently, in the Peter the Great Botanical Garden of the BIN RAS (St. Petersburg) there are already 17 species and about 160 varieties, including many varieties of modern selection of domestic breeders. Constant observations of the lilac collection in the Peter the Great Botanical Garden revealed a complex of pathogens of fungal and bacterial infections that manifest themselves in different periods of plant vegetation. A tested complex of agronomic measures is presented, which reduces the detection of fungal and bacterial diseases, as well as increases the resistance of plants to pathogens. To protect plants in the garden on collection plants, various immunomodulators are used: immunocytophyte, albite, siliplant, ecofus.