THE STUDY OF SCION- ROOTSTOCK COMBINATIONS OF SAKURA'S FORMS ON CLONE ROOTSTOCKS IN THE CONDITIONS OF SOUTH OF RUSSIA
The main goal of this work is to assess the adaptability and biometric parameters of the scion-rootstock combinations of Sakura under the conditions of urban environment. The greening in the modern urban landscape involves the presence of beautifully blooming trees of different heights and crown volume. According to this aim, in our study we analyzed the effect of clonal rootstocks VSL-2 (breeding of Krymsk ESS branch of WIR), 3-76, 5-44, 5-42, 3-114, 7-42 (breeding of FSBSI NCFSCHVW) at the height of the trees of popular varieties (Prunus Shirofugen serrulata, P. serrulata Kiku-shidare-sakura, P Burgundi Royal serrulata, P. serrulata Kanzan, Rexii (Kirhn). Sok) and promising forms of Sakura, including NCFSCHVW breeding under the arboretums condition of Sochi and Krasnodar. For the experiment the forms (scion, rootstock), selected for resistance to coccomicous (pathogen - Blumeriella jaapii (Rehm) Arx)) in the collectional planting of NCFSCHVW were taken. The Vesenniy capris (AI1) form wasn't defeat by coccomicous, even with the artificial infection, and shows the high resistance (100%). The forms, lesioned by moniliosis (causative agent - the fungus Monilia cinerea Bon.) were selected, there are Rexii (Kirhn) Sok, P. serrulata Kiku-shidare-sakura, Symphoniya nezhnosty. As a result of the study carried out, the lesion of the forms studied by the main pathogens under the conditions of humid subtropics of Sochi was estimated, the most adaptive combinations were identified, their height is determined. The influence of rootstocks and scions the growth and development of combinations of Sakura was shown. The obtained new data of the scion-rootstock combinations characteristics are necessary to develop the methods of original spatial and plastic accents that improve the urban environment and natural and climatic conditions of the South Region.