Agriculture and forestry

Polishchuk V. V. − Doctor of Agricultural Sciences, Professor, Dean of the Faculty of Forestry and Horticulture of Uman National University of Horticulture, (20300, Uman, street Institute 1, valentyn7613 @ gmail. com)

Mykolayko V. P. − Doctor of Agricultural Sciences, Professor, Dean of the Faculty of Natural Geography, Uman State Pedagogical University. Paul Ticini.

Polishchuk T.V. − Candidate of Agricultural Sciences, Art. Lecturer of the Department of Biology and Methods of Teaching Uman National University of Horticulture. (20300, Uman, street Institute 1).

Kalyuzhna L.V. − graduate student of the Department of Horticulture of Uman National University of Horticulture (20300, Uman, street Institute 1).

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Fifty introduced tulip varieties (TULIPA L.) were evaluated in the conditions of the Right-Bank Forest-Steppe of Ukraine, represented by different genotypes, mainly foreign selection, for resistance to gray rot Botrytis CinereaPersTulipae.However, as with most flowering plants, tulips are damaged by pests and diseases. It is known that the main source of infection is the soil, especially when growing tulips in monoculture. From the soil, fungal spores penetrate into the roots of the plant and spread through the leading vessels into the stem. The accumulation of mycelium of the fungus in the vessels prevents the transfer of nutrients and moisture. This disease is so dangerous that today, there are almost no varieties of tulips that would be absolutely stable to this disease. However, there are advantages, namely - if the tulip variety is early ripening and it has already completed the flowering phase before the disease, then such plants are resistant and adapted to gray rot. A brief agrobiological and decorative characteristic of collection varieties in the conditions of the Right-Bank Forest-Steppe of Ukraine is given. The resistance of plants to damage to gray rot was carried out in accordance with the current methods, that is, on 25 plants of the 50 studied introduced tulip varieties, damage to vegetative and generative organs was visually determined after planting in the soil in spring.Atypical plants or those damaged by the disease were marked with special ribbons, and then culling was carried out and the percentage of affected plants was calculated. After the complete ontogeny of tulip plant varieties, the bulbs were dug out and carefully checked for disease infection before storage. Field observations regarding the resistance of various tulip cultivars to gray rot in the Forest-Steppe conditions of Ukraine investigated that the incidence of genotypes was at a low and very low level, despite the contrasting weather conditions of different years of research. 

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