Zayarna O. Barley seedling infection and optimization of protection measures in the Eastern Forest-Steppe of Ukraine.

Pathogens in the seeds, identified by a wet chamber: Drechslera sorokiniana, Drechslera teres, Fusarium sp., Alternaria sp., Penicillium sp. Differentiation of spring barley varieties of domestic selection for resistance to diseases stored on seeds showed that the most resistant to all types of smuts, both with artificial insemination of seeds and in the natural background was the Monomakh variety. The effectiveness in vitro of drugs has been established in limiting the growth rate of Drechslera sorokiniana Subram&Jain fungus colony. The scientific provisions and their novelty are that for the first time in Ukraine the effectiveness of application of plant growth regulator Vympel, 80% (0.26 l/t) for pre-sowing treatment of spring barley seeds against fungal diseases was established. The scientific and practical value of the work consists in a comprehensive assessment of the conducted research, which makes it possible to optimize the system of barley protection for agricultural production in the conditions of the Eastern Forest-Steppe of Ukraine, stabilizes the phytosanitary state of crops and promotes solving of the phytosanitary, economic and environmental problems of the region.