Relevance. Tomato occupies a special place among vegetable crops in the world, including in the Republic of Dagestan. The article presents the results of research on the use of biostimulators of growth on the productivity of tomato plants in open ground conditions of the Tersk-Sulak subprovincion of Dagestan. The purpose of the study was to evaluate the effectiveness of the use of the biological product Relict R and Humate+7 on economically valuable indicators in the production of tomatoes of domestic selection in open ground conditions. Tomatoes were grown using conventional technology in open ground conditions.   Material and methodology. The research was carried out on the basis of the Tersko-Sulak subprovince of the Federal Agricultural Research Center of the Republic of Dagestan of the Kizlyar district. The soil of the experimental site is alluvial-meadow, medium-saline, medium loamy in mechanical composition. Agricultural technology is generally accepted in the Republic of Dagestan for tomato culture. The objects of research were tomatoes of the Voskhod VNIISSOKa variety, Relict R, Humate+7.   Results. The use of humic preparations accelerated the duration of the interphase period of germination-maturation, the difference in variants ranged from 6 to 11 days. The yield of tomatoes has shown that the use of biostimulants of growth gives a significant increase. Relict P turned out to be the most effective – the increase was 4.1 t/ha. The effectiveness of Humate+7 also exceeded the control yield and amounted to 2.3 t/ha, respectively. The use of the biopreparation stimulated the accumulation of dry substances in tomato fruits from 5.9 % in the control to 6.4-6.9 % in the experimental versions, the sugar content increased by 0.2 %. The studied preparations had a positive effect on the yield and quality indicators of tomatoes. According to the research results, it is recommended to use the Relict R – liquid humic preparation on tomato to increase yields and quality indicators in the conditions of the south of the country.

Relevance. The region continues to build new industrial greenhouses every year, as well as mass construction of winter film greenhouses in the farms of the population of Flat and foothill Dagestan. Today, there are more than 250 hectares of them.Methods. Experimental work was carried out in the greenhouse of LLC Agro-AS in 2019-2020. Carried out selection and evaluation of promising hybrids of tomato for the summer-autumn turnover in greenhouses. Studied the duration of interphase periods, estimated the percentage of fruit set in the inflorescence, determined the yield of tomato hybrids, and calculated the most economically promising ones for the natural and climatic conditions of Dagestan.Results. For the first time in the conditions of flat Dagestan, the following experimental data are proved the main elements of industrial technology for obtaining a high yield of tomatoes in protected ground structures using low-volume hydroponic technology on a coconut substrate were experimentally justified; highly productive tomato hybrids were identified for various protected ground structures; F1 hybrids were distinguished by good yield from the second decade of September to the second decade of December; hybrids such as Men-Shuai F1 and Mamston F1 provided 24.3 kg/m2 and 23.1 kg/m2 , respectively, according to the highest percentage of fruit setting, as well as the total and commercial yield. The term of planting seedlings in the substrate in the summer and autumn turnover in the conditions of the suburbs of Makhachkala on July 10 is economically effective, which ensures a high yield and net income per unit area. At the selling price of tomato fruits of 100-110 rubles per 1 kg, the profitability of production, depending on the timing of harvesting and sales, was 100-122%.

Relevance. Dagestan is a zone of prosperous agriculture, distinguished by the abundance of heat, sun and irrigation in the plain zone. Tomatoes occupy a special place among vegetable crops in the world, including in the Republic of Dagestan. Determinant varieties are now the most common in the production of tomatoes, especially in the open ground. The main areas of specialized cultivation of tomatoes in the open ground are concentrated in the Kizlyar and Derbent districts of plain Dagestan. In these areas, there are high average daily temperatures for the formation and ripening of tomato fruits in excess, which is favorably reflected in the overall productivity of the bushes. Whereas in the foothills of Dagestan, insufficient heat resources do not allow growing tomato varieties with a long growing season. In the foothill part of the republic there is a large labor-resource potential, vegetable growing, as a labor-intensive type of agribusiness, acts as a sphere of employment for a significant part of the rural population. The demand for tomato varieties with a short growing season in this part of the republic is great.Methods. The research was carried out on the basis of the Tersko Sulak subprovincion of the FGBNU of the FANC RD of the Kizlyar district. The soil of the experimental site is alluvial-meadow, medium-saline, medium loamy in mechanical composition. Agrotechnics is generally accepted in the Republic of Dagestan for tomato culture.Results. The method for the study was the new semi-stamp cultivars of FGBNU FNCO (VNIISSOK) selection: Fakel (counter), Blagodatny, Viking, Voskhod VNIISSOKa, Magnat, Severyanka, Sodruzhestvo, Perst, Patrice. According to the maturation dates, the samples were divided into three groups: very early – Severyanka, Blagodatny, Magnat, Voskhod VNIISSOK (97-100 days); early – Patrice, Viking, Perst (102-105 days); middle-early – Sodruzhestvo, Fakel (111-114 days). According to the type of bush, we have identified 5 ordinary and semi-lamb samples with a height of no more than 78 cm. Two samples had a height of 50-53 cm (Patrice, Perst) and an average fetal weight of 72 and 60 g. Three samples had a height of 70, 71, 72 cm (Voskhod VNIISSOKa, Blagodatny, Sodruzhestvo) and an average fetal weight of 107, 110, 130 g. According to the output of gross output, the best indicators were of the following varieties: Blagodatny – 86.3; Voskhod VNIISSOKa – 82.7; Sodruzhestvo – 77.6 t/ha; Patrice – 68.2 t/ha. The following grades had  a high yield of marketable products: Voskhod VNIISSOKa, Patrice – 92%; Blagodatny – 91%; Perst – 90%. The varieties also have a relatively high dry matter index of 5.3-6.4%.

Relevance. Tomato is one of the main vegetable crops and is grown everywhere in the open and protected ground in the North Caucasus region of Russia. Therefore, increasing the production of tomato fruits in the open ground is an important task for vegetable growers in the south of our country. There is too much dependence on imported seeds. To get rid of this, it is necessary to increase breeding activity, create domestic varieties and hybrids of tomatoes with high potential productivity, resistant to adverse environmental factors and adapted to local growing conditions.Methods. The research was carried out at the experimental site of the Federal Agrarian Scientific Center of the Republic of Dagestan, located in the Primorsky lowland, at an altitude of 17 m above sea level. Agrotechnics is generally accepted in the Republic of Dagestan for tomato culture.Results. The results of the research indicate that most of the studied varieties and hybrids belong to plants of the determinant type of early maturation with average stability, with large and medium fruits of flat-rounded and rounded shape, with medium and high yields and relative resistance to fungal diseases. According to the largest number of fruits on the first brush, four varieties differ: Topaz, Yana, Chelnok, Talisman (6.5-5.7). On the basis of the "number of fruits" on the second brush, almost all varieties are marked, which is of interest to breeding. On the basis of the "distance between the brushes" varieties Yana, Marti, Grant, Perst, Topaz – are characterized by a generative (shortened internodes) type of plant (12-16 cm). The source material also differs in the shape of the fruit – 8 samples have a rounded, 3 samples have an elongated oval, 5 samples have a flatrounded and 2 samples have a cuboid shape of the fruit. The color of the fruits in the technical phase of ripeness in the studied varieties and lines was with (8 samples) or without (12 samples) an intense green spot. In biological ripeness 12 varieties and lines have a red color of the fruit.

Relevance. One of the dynamically developing areas of the agro-industrial complex of the Republic of Dagestan is vegetable growing of protected ground. This is facilitated by natural and climatic conditions, the availability of markets for products, and the interest of vegetable producers in expanding greenhouse areas. The area of greenhouses today exceeds 230 hectares. The lack of science-based technology, the lack of promising hybrids, due to the lack of study of the topic of growing and selecting varieties of vegetable crops in protected ground in the conditions of Flat and foothill Dagestan, greenhouse farms bear significant losses. The quantity and quality of the greenhouse tomato crop largely depends on the well-chosen varieties (hybrids) of tomato, the timing of seed sowing and seedling planting.Methods. Experimental work was carried out in the greenhouse of LLC Agro-AS. The selection and evaluation of tomato hybrids for cultivation in film greenhouses in the winter-spring turnover were carried out. The control is the Tiwai 12 F1. The optimal time for sowing seeds and planting seedlings in the substrate for winter-spring turnover of film greenhouses was determined.Results. The characteristic of promising hybrids for growing in winter and spring turnover is given. The results of the dynamics of crop yield by month are presented. The influence of sowing and planting times on the duration of the growing season and the yield of tomatoes is shown. The optimal scheme of sowing and planting tomatoes in the conditions of winter and spring turnover is determined. Data on the economic efficiency of the studied planting dates are presented. The prospects of growing the studied hybrids in this region are indicated.

Relevanc and methods. The article presents the research results on the introduction of artichoke in Uzbekistan. In the process of research, some issues of artichoke seed production in the conditions of dry subtropics of Uzbekistan were also studied. Studies were carried out on the Krasavets cultivar. When identifying the most effective method for forming a seed bush, the comparison of growing seed plants without formation and 4 methods of formation was compared: 1 stalk on a plant and 3 inflorescences on a stalk, 2 stems on a plant and three inflorescences on each, 3 stems on a plant and three inflorescences on each, 4 stems on the plant and three inflorescences on each. Results.It was revealed that artichoke plants grow and develop, form full-fledged seeds during the growing season. The manifestation of morphobiological and economically valuable traits largely depends on the age of the plants. A significant reduction in the growing season, an increase in the height of plants and the number of stems, an increase in the average mass and number of inflorescences and, ultimately, yield occurs in the second year of plant life. It was also revealed that the potential productivity of artichoke plants in Uzbekistan is very high. The yield of the Krasavets cultivar in the second year of life is 55.5 t/ha, and that of the Green Globe cultivar is 39.2 t/ha. This is significantly higher than the global average. The highest seed productivity was noted in the variant without the formation of a seed plant: 734.2 g/plant or 15789 seeds/plant. However, in such indicators as the mass and number of seeds from one inflorescence, the mass of 1000 seeds of a plant without formation is significantly inferior to other options. Based on the results of experiment 3, 4, 5, the options can be considered appropriate to use in artichoke seed production.