GENERIC COMPOSITION AND FUNGAL DISEASES AGGRESSIVENESS IN ANNUAL FLOWER CROPS

In the context of the development of the agro-industrial complex and the replacement of imported plant material in the Russian Federation, the development of methods and technologies for the prevention and control of diseases and pests is a priority area of agrarian science. Fungal diseases cause great damage to both vegetable and ornamental crops. Some of the most harmful phytopathogens are fungi of the genus Fusarium (Fusarium Link). The objective of the study is to identify and determine the aggressiveness of the pathogenic mycobiota complex present on annual flowering plants of the Lamiaceae Bromhead family. During immunological studies on plants, fungal pathogens from the genera Alternaria Nees, Fusarium Link, some species of Pythium spp. and representatives of lower mold fungi Penicillium Link, Mucor Fresen were identified. Based on this, a collection of the most common pathogens from the genera Alternaria (5 samples) and Fusarium (10 samples) was created. When testing the selected samples using the method of L.M. Sokolova, the strains of alternariosis did not show high pathogenicity, the damage score of the tested material was from 0.5 to 1.0. When testing the strains of fusarium, the damage score varied from 1.0 to 4.0. Based on this, only one aggressive strain FAK-7 was selected, which had a damage score of 4.0 for the tested material. This pathogenic strain was isolated from the root system of the snapdragon selection line A-5-1. This strain will be involved in the selection process to work on the resistance of snapdragon lines and varieties to root rot.