Abstract
In recent years, research on the study of flax diseases has not been conducted in Kazakhstan and Russia. Research on diseases and pests of flax in the CIS countries is devoted to applied issues aimed at evaluating the effectiveness of preparations for pre-sowing seed treatment, monitoring the spread of diseases and pests, and assessing their impact. Research on flax seeds in different parts of the world is especially important because the response of cultivars to fungal pathogens can vary regionally due to the presence and/or development of new strains of the pathogen. The article presents the research results on the influence of fungicides on seed infection of flax and lentils in laboratory conditions. The data from phytoexamination of lentil and flax seeds showed that these crops were dominated by fungi from the genera Fusarium and Alternaria, and bacterial exudate was also noted with a frequency of occurrence ranging from 57.1% to 85.7%. Evaluation of the effectiveness of seed dressing in a controlled laboratory environment showed that all tested preparations, including Selest Top 312.5, s.c. (thiamethoxam, 262.5 g/l + difenoconazole, 25 g/l + fludioxonil, 25 g/l), Lamador, s.c. (prothioconazole, 250 g/l + tebuconazole, 150 g/l), and Olimp, s.c. (flutriafol, 75 g/l + thiabendazole, 50 g/l + imazalil, 15 g/l), were highly effective against Fusarium spp. and Alternaria spp.