The thesis summarizes the European and domestic experience in growing planting stock, namely, vegetative and seed stock and grafting decorative forms on them Morus alba L. Basic research was conducted during 2005-2012 in the nursery of fruit and ornamental plants of the National arboretum «Sofiyivka» of the NAS of Ukraine and in the hothouse-greenhouse complex (2013-2020) of the Uman National University of Horticulture. It is noted that under conditions of introduction these plants are placed in phenological rhythms of vegetation of new climatic conditions of the area of introduction; it was found that a slight difference at the beginning and end of individual phases is a consequence of the general natural range. Ornamental forms of M. alba L. under the conditions of stationary research (Right-Bank Forest-Steppe of Ukraine) have a short period of forced dormancy. A method for a comprehensive assessment of frost resistance and winter hardiness of M. alba L. ornamental forms has been developed, based on the determination of the degree of soil moisture, lignification of the shoots of the current year. It has been established that lignified cuttings collected from the root part of annual shoots of young (up to five years old) plants that have not passed into the fruiting phase have the best regenerative abilities. Among the stimulants, clonex turned out to be the most effective - from 64.7 to 70.5% of rooting. In the control variant (without stimulants), rooting was only 21.4-30.2%. For green cuttings, cuttings obtained from the root and medial parts of the shoots of the current year turned out to be the best, and the effectiveness of the stimulator clonex was noted to be 81.0%. Among the stimulants, clonex turned out to be the most effective - from 64.7 to 70.5% of rooting. In the control variant (without stimulants), rooting was only 21.4-30.2%. Green cuttings harvested from the lower and middle parts of the shoots of the current year rooted better, and the effectiveness of the clonex stimulator was 81.0%. High germination (about 86.0%) was obtained by sowing M. alba L. seeds in the summer to a soil depth of 1.0 cm.The lowest germination rate of M. alba seeds was obtained when sowing to a depth of 3.0-4.0 cm. With winter grafting, the best result was observed in M. a. 'Tatarikа', when the method of improved copulation was used (64.0%). For other ornamental forms of M. alba, the results were as follows: M. a. 'Conorta' - 30.0%; M. a., 'Globosa' - 40.0%; M. a. 'Pyramidalis' - 32.0%; M. a. 'Macrophylla' - 48.0%; M. a. 'Pendula' - 45.0%. Among the various periods of spring grafting, the most effective was the middle of spring, and among the methods - improved copulation: M. a. 'Tatarika' - from 88.0 to 92.0%; M. a. 'Pendula' - 78.0-84.0%; M. a. 'Macrophylla' - 65.0-75.0%; M. a. 'Pyramidalis' - 61.0% - 68.0%; M. a. 'Globosa' - 58.0% -62.0% and M. a. "Kontorta" - 54.0-62.0% of merging. In spring grafting with a kidney for the bark, the following results were obtained: M. a 'Tatarica' - 68.0%; M. a. 'Pendula' - 65.0%, M. a. Macrophylla - 64.0%; M. a. 'Pyramidalis' - 61.0%; M. a. 'Globosа' - 57.0% and M. 'Conorta' - 54.0%. With the summer grafting with the kidney for the bark, the results were higher: M. a. 'Tatarika' - 75.0%; M. a. 'Pendula' - 72.0%; M. a. 'Macrophylla' - 71.0%; M. a. Pyramidalis' - 68.0%; M. a. Globosa - 64.0%; M. a. 'Conorta' - 60.0%. Approaches to the standardization of planting material (decorative forms of M. alba) have been substantiated, and a classification modification of hedges has been proposed, taking into account seven main indicators: biological characteristics, arrangement, planting method, maintenance technique, number of rows, presence of a stem and height. On the example of ornamental forms M. alba, a method for a comprehensive assessment of the state of woody plants has been developed. A method of complex control of Aphis pomi (green aphids) is proposed, which consists in their timely destruction at the most vulnerable stages of development, including the parallel destruction of ants that protect them. The features of the lesion of M. alba L. and its decorative forms of the mulberry Pseudaulacaspis pentagona were studied. A three-point scale has been proposed to determine the degree of damage to M. alba L. and its decorative forms by this pest. Analysis of the cultivation of planting material of decorative forms of M. alba confirmed that the profitability of growing ornamental forms on seed stocks on a low stem is - 80.3; high - 49.8%. On vegetative rootstocks, the profitability is as follows: green cuttings on a low stem - 55.3; high, like the green ones - 84.6%. It has been established that the most promising forms of M. alba for use in forest cultures is M. and. 'Pyramidalis', M. a. 'Macrophylla' and M. a. 'Tatarica'.
