Fruit growing
and viticulture of South Russia

Annotation

The article shows the results of studies on the effectiveness of the use of physiological active substances (FAS) for top dressing treatment of vegetative saplings for the formation and development of the root system of grapes. The purpose of this work is to reveal the fundamental possibility of obtaining the high-quality root-owning planting material from shortened cuttings of phyloxera tolerant grape varieties with a limited nutrition area using physiological active substances. Studies were carried out on promising grape varieties for the Republic of Dagestan, suitable for cultivation in the root own crop. The Agadai variety served as a control. It has been established that for phylloxera-tolerant technical grape varieties, when the top dressing application of FAS the indicators shown for the quality of native root planting material are achieved. The use of physiological active Substances by treating the leaf surface of grape sapling is more effective and more appropriate than the preplanting application of an auxin preparation. In particular, in the process of studying a promising technical variety of Pervenets Magarach for the Republic of Daghestan suitable for own roots cultivationit it is revealed that the optimal for obtaining root- owning planting material is a planting scheme of 20x10 cm with a cuttings length of 20 cm and when the treatment of vegetative plants with a solution of FAS when the shoots of 20-30 cm in length. The results of carried out research open the way for accelerated propagation of especially valuable phyloxera-tolerant grape varieties under the condition of limited genetic material and land resources.

Annotation

The natural edaphoclimatic conditions of the Republic of Dagestan are favorable for growing grapes of different ripening periods and different directions of use. The cultivated assortment in the region is mainly represented by introduced varieties, but the potential of local varieties is much higher, so in the future viticulture should rely on local, highly adaptive, high-quality, consistently productive and advanced varieties that give exclusive wine products. The breeding renewal of the domestic grape assortment will allow to successfully solve the problems of import substitution in the viticulture industry of the Republic of Dagestan. The selection of elite grape seedlings took place on the basis of five-year studies. The main criterion for the selection of elite seedlings is stable yield capacity, plant resistance to diseases and pests, tolerance to the root form of phylloxera. The created hybrid fund of grapes will serve as a basis for improving breeding work in accordance with the objectives of research. The purpose of the research is to breed high-quality, relatively resistant to phylloxera and fungal diseases, varieties adapted to edaphoclimatic conditions. The varieties should have varietal flavor, the optimal ratio of sugar content and acidity in berry juice, high content of biologically active substances. In the conditions of Dagestan, the Pervenets Magaracha variety shows high adaptability and yield capacity. This variety is widely involved in the breeding program of crosses of the station as a donor of stability. Agrobiological study of hybrid forms of grapes was carried out in the hybrid nursery of DBESV&VG. The article presents an agrobiological and economic and technological assessment of elite seedlings of the station�s new breeding, bred by hybridization of native varieties and the PervenetsMagaracha variety as a donor of resistance to biotic and abiotic stressors. The selected elite seedling 13-6-13 (Khatmi x Pervenets Magaracha) is distinguished by high quality indicators, showed biological endurance in hybrid nursery against a strong infectious background for phylloxera and fungal diseases. The use of the PervenetsMagaracha variety in the breeding of new varieties, with the involvement of Dagestan native varieties, allows obtaining genotypes with high resistance to diseases and pests of grapes in Dagestan.