Relevance. Aeromonosis (carp rubella, hemorrhagic septicemia, infectious abdominal dropsy, Lublin disease) — an infectious disease of fish. Carp, common carp and their hybrids from underyearlings to broodstock are susceptible to the disease. The epizootic reaches its greatest distribution in the spring-summer period, by autumn it fades and the disease takes on a chronic course.
Methods. The object of research was the fish Cyprinus carpio. In the experiments, we used the reference strain Aeromonas hydrophila ATCC 7966 of the Global Center for Bioresources, as well as isolates isolated during outbreaks of carp aeromonosis in fish farms in the Moscow region. The diagnosis for the presence of aeromonosis was established on the basis of epizootological, clinical and pathological data and the results of bacteriological studies. The study of biofilms of microorganisms was carried out during cultivation in liquid nutrient media, the CFU of microorganisms was counted and sown on the surface of solid media.
Results.The total number of microorganisms (CFU, lg/g) of intestinal microbiocenoses— 54,21 ±0,05 – 66,09 ±0,12. Cultures of microorganisms A. hydrophyla, A. sobria, A. caviae were isolated from blood, heart, spleen, gills, intestine, liver and kidneys of fish. During cultivation at 37 °C for 6–72 h, the adhesion of vegetative forms of bacteria with a typical shape and size of the species and the formation of a bacterial monolayer — a diffuse layer of bacterial cells — was revealed. Viable and non-viable microorganisms were differentiated by fluorescence microscopy. On meat-peptone agar with 5,0% of defibrinated blood, as a rule, the growth of b-hemolytic colonies was observed, less often a-hemolytic colonies. When determining the enzyme DNase, a light zone was found along the inoculation line on the DNA BA medium. Growth of b-hemolytic cultures was observed on meat-peptone agar with 5,0% of defibrinated blood. When determining the DNase enzyme on the surface of the dense nutrient medium “DNA BA”, a light transparent zone was revealed around the colonies of microorganisms. Prevention of aeromonosis is based on systematic monitoring of the etiological structure of pathogens of aeromonosis; feeding in feeding and summer mother ponds begins in the spring when the water temperature rises to 14 °C.

Relevance. Chlamydia (ornithosis) (Chlamydiosis) is a bacterial disease, which is a zooanthroponosis, with pronounced natural foci. Chlamydia (ornithosis) is widespread in the world among animals and birds; they are recorded on all continents. The key study is Chlamydia psittaci. Infections caused by this pathogen cause a group of endocarditis, myocarditis, arthritis, keratoconjunctivitis and encephalitis, pneumonia in people. C. psittaci causes recombination most often, which increases the likelihood of a possible role of recombination in the adaptation of C. psittaci to host owners (birds, mammals, including humans). Chlamydia is one of the most dangerous and especially significant infectious diseases, especially for humans and animals, causing great economic damage, which occurs from the following consequences: reduced productivity (up to 50–60%); death of young animals from pneumonia (up to 20%); loss of animal reproduction as a result of abortions and stillbirths (5–30%), the occurrence of non-viable offspring (about 10%), an increase in infertility (up to 50%); carrying out medical, quarantine and emergency measures. Therefore, annual epizootic monitoring of morbidity takes place on the territory of the Russian Federation. The article publishes the reporting data of veterinary laboratory years of the 4th form on the diagnosis of bird ornithosis on the territory of the Russian Federation for 2018–2020.
Methodology. An assessment of the epizootic situation for chlamydia (ornithosis) in birds in the Russian Federation for 2018–2020, based on the results of the analysis, income from annual reports, observations of state veterinary laboratories in the Federal State Budgetary Institution CNMVL in the 4-vet (annual) form.
Results. During the analyzed period, the number of cases of the disease was detected among 16%, while an increase in the number of detected cases of ornithosis among birds. In 2018–2020, positive cases of ornithosis were detected in the Volga Federal District, Northwestern Federal District, Ural Federal District, Siberian Federal District, Central Federal District, and in 2020 ornithosis was detected in the Southern Federal District and the Far East Federal District bird ornithosis situation in these territories.

Relevance. Silage of the green mass of perennial legumes remains a difficult task due to the high protein and water content. It is possible to obtain from them a feed slightly inferior to the original green mass in terms of energy nutrition and protein content, as well as biologically active substances, only by siloing them in a slightly dried form (30–40% dry matter) using effective preservatives.
Methods. To study the digestibility of nutrients of silos of legume-cereal grass mixtures in the conditions of LLC “Garant” of the Belebeyevsky district of the Republic of Bashkortostan, two physiological studies were conducted. According to the principle of pairs of analogues (breed, age at calving, live weight, lactation phase, productivity level), 6 groups of cows of the Bestuzhev breed were selected at the beginning of lactation, 10 heads each. In the first experiment, 20 kg of corn silage was received as part of the diet of cows of the 1st control group, and animals from the 2nd and 3rd experimental groups were fed with silage from a mixture of alfalfa and boneless stalk in the amount of 20 and 25 kg, respectively. In the second experiment, animals of the 1st control group received 20 kg of corn silage, and in the 2nd and 3rd experimental groups, 20 and 25 kg of silage of a mixture of clover and boneless stalk were included in the feeding diet. In the third group of each experiment, the proportion of compound feeds in the rations was reduced by 1 kg per head per day.
Results. Studies have shown that the use of silos from legume-cereal grass mixtures in the diets of dairy cows in the amount of 20 and 25 kg instead of the same amount of similar feed from corn increases the digestibility and digestibility of feed nutrients. At the same time, the use of compound feeds in the diets of dairy cows is reduced by 1 kg per head per day, which is of great practical importance in the conditions of a modern market economy.

The article is devoted to the results of studies on the effect of vitamin-herbal flour obtained from the green mass of Rhaponticum carthamoides on Holstein black-andwhite calves at the age of 15 months to improve the morpho-biochemical status of blood. Experimental studies were carried out in LLC “Agroenterprise “Sokolovo” of the Perm Region. Rhaponticum carthamoides, used for the manufacture of vitamin and herbal flour, was grown in the experimental field of the Perm Research Institute. The purpose of our research was to study the effect of feeding vitamin-herbal flour from Rhaponticum carthamoides on metabolic processes in the body of young cattle.
Methods. In the production experiment, 15-month-old heifers of holstein 350 kg were selected. Previously, the animals were distributed into a control (main diet) and 2 experimental groups (main diet + vitamin and herbal flour (TMM) from Rhaponticum carthamoides) of 12 heads each. The main diet of heifers consisted of compound feed (KK 60-3 recipe 400). The dose and feeding period of vitamin-herbal flour: 1st and 2^nd experimental groups with 15 months of life of 150 gr. and 300 gr. per day, the duration of feeding — 90 days. Vitamin-herbal flour was fed individually on the feed table. During the experiment, the general condition of the animals was monitored.
Results. It was found that the introduction of vitamin-herbal flour (levzea) into the diet of young cattle (heifers) for 3 months contributed to the normalization of the morphobiochemical composition of the blood of experimental animals. The clinical condition of chicks without deviations from the physiological norm.

Relevance. When using protease in the feeding of broiler chickens, the question arises about its effect on other enzyme additives. The solution to this problem can be the use of multienzyme compositions.
Methods. The titrometric method for determining nitrogen (according to Kjeldahl), followed by conversion to protein, allows us to evaluate the efficiency of the enzyme complex, taking into account changes in the composition of the diet in different phases of feeding
Results. It was found that the use of the multienzyme feed additive “Natuzyme” allows to obtain a high digestibility of feed protein, especially at the final fattening – 84.1%, with the introduction of 5% sunflower meal into the diet.

Relevance. More protein is required for the formation of meat than for obtaining high weight gain of pigs, many scientific papers and experimental studies have been devoted to optimizing metabolism and increasing animal productivity through the use of nontraditional sources of protein, carbohydrates, vitamins and minerals, but there are poorly studied feed products. Soy okara is of scientific interest as a multicomponent proteincarbohydrate-mineral-vitamin supplement (BUMVD). It is of natural origin, non-toxic, urease is not active in it, that is, it does not require special treatment for feeding pigs. In comparison with soy, which contains anti-nutritional substances — toxic substances, trypsin inhibitor and urease, which reduce the use of protein by all kinds of animals, and in monogastric animals can even cause poisoning.
Methods. Production tests were carried out for 180 days in the pig farm of the Ulyanovsk region on 1560 pigs. The object of the study was pigs of a large white breed, of different ages and physiological conditions. For physiological experiments, 5 animals per group were selected according to the method of analogues. Single sows were inseminated and the supplement was fed 30 days before the piglets were born. Piglets and suckling sows were kept in individual cages. Weaning was carried out in 45 days. Piglets on cultivation and fattening were kept in a group way. Two groups of animals were formed: the 1st (control) received the main ration (OR), the 2nd (experience) — with BUMVD. The conditions of keeping pigs in the control and experimental groups were the same, the difference between the groups was in feeding, the additive was fed at a dose of 100 to 500 g/head/day according to the scheme.
Results. The introduction of natural BUMVD (soy okara) into the diet of pigs contributes to an increase in the level of their productivity: suckling of sows; large-fruited piglets; the intensity of growth of young pigs; improving the meat-sucking qualities of carcasses; reducing feed costs, improving the quality of pork, its energy value.

The article presents the results of studying the morphological composition of the carcass of bull-calves of different directions of productivity. The object of the study was bulls of the Red Steppe (I group), Simmental (II group) and Kazakh white-headed breeds (III group). During the control slaughter of three bulls from each group at the age of 18 months, the morphological composition of the right half-carcasses of young animals of each genotype was studied using the VASHNIL, VISH, VNIIMP method. At the same time, the mass of the half-carcass, absolute and relative masses of pulp, muscle and adipose tissue, bones and connective tissue formations were established. The arithmetic mean, the mean square deviation, and the coefficient of variation were determined. Indicators of variation statistics were calculated using the guidelines of N.A. Plokhinsky. The reliability of indicators was determined using Student’s t-test. When studying the morphological composition of the half carcass, it was found that the absolute weight of the pulp in bulls of the red steppe breed was 87.8 kg, relative — 76.4%, young animals of the Simmental breed, respectively, 104.0 kg and 77.6%, animals of the Kazakh whiteheaded breed — 102, 3 kg and 79.2%. The yield of muscle tissue in the bulls of the experimental groups was, respectively, 76.3 kg and 66.4%, 91.5 kg and 68.3%, 90.6 kg and 70.1%,respectively, the output of adipose tissue was 11.5 kg and 10. 0%, 12.5 kg and 9.3%, 11.7 kg and 9.1%, bone yield — 22.9 kg and 19.9%, 24.8 kg and 18.5%, 17.8 kg and 17.8%.

Relevance. The article discusses the possibilities of using amino acids (glycine, methionine, glutamic acid) and rosehip flour, passed through a laser beam in a mounted (spatial) modulator, as biocorrectors. Air ionization was carried out during the subsequent LLLT. Among the factors that determine the way out of the current situations at the regional level, it is necessary to note the biotechnical method of influencing the organism of broilers of the Ross 508 cross of the Scottish company (Ross Breeders Ltd New bridge Scotland). Their use improved the state of carbohydrate, protein, fat, amino acid and vitamin metabolism, caused functional activation of the digestive system in it, along with an increase in enzyme, immune and hormonal systems, it made it possible to more fully realize the level of meat productivity, improve some biochemical blood parameters.
Results. Biotechnical methods (AI, LILI, rosehip flour) of influence on the organism of broiler chickens make it possible to economically use compound feed, stimulate growth and development, and increase their live weight from one week of age. In connection with the use of biotechnical methods on the body of the bird, some biochemical parameters of the blood have improved.

Relevance. Insufficient tolerance to extremely high temperatures is one of the main reasons for the decline in crop yields.
Methods. Two contrasting durum wheat genotypes (Triticum durum Desf.) were used in the present study: Barakatli 95 (tolerant genotype) and Garagylchyg 2 (stress-sensitive genotype). The activity of antioxidant enzymes, ascorbate peroxidase (APO), catalase (CAT), guaiacolperoxidase (GPO), and benzidine peroxidase (BPO), were studied spectrophotometrically. The membrane thermostability was determined by the release of electrolytes from intact plant tissue.
Results. It was revealed that guaiacolperoxidase plays a key role in the elimination of reactive oxygen species when exposed to high temperatures, since a significant increase in the activity of this enzyme was observed during short-term thermal stress. Heat stress caused a slight decrease in catalase activity and a significant decrease in the activity of ascorbate peroxidase and benzidine peroxidase. An increase in total protein concentration was observed under heat stress. The indicators of the electrolyte leakage from leaf tissues confirm the variety-specific thermostability of wheat membranes. The membrane damage rate (MDR) increased in direct proportion to the heating temperature and showed the highest value in the sensitive Garagylchyg 2 variety. According to the electrolyte leackage parameters from leaf tissues during hyperthermia, was concluded variety-specific thermal stability of wheat plant membranes.

Introduction and methodology. The value of the initial material is primarily determined by the tasks of modern breeding process, collection material playing an important role in it. The purpose of the current study was to estimate the initial material of winter durum wheat according to their yield structure elements in the south of the Rostov region. The objects of research were 159 winter durum wheat samples among which there were 69 of domestic breeding and 90 of foreign one.
Results. The study has shown that in 2019–2020 grain productivity of the collection samples ranged from 227.9 g/m2 to 735.9 g/m2. All studied samples were divided into three groups according to the trait ‘productive stand’ (number of productive stems per 1 m2). There were 17.6% of samples with a small value of the trait (201–400 pcs./m2); with a mean value of the trait (401–600 pcs./m2) there were 72.3% of samples and with a large value of the trait (601–800 pcs./m2) there were 10.1% of samples. According to the trait ‘plant height’ more than a half of the samples (57.0%) belonged to the ‘semi-dwarf’ group (61–85 cm). Large part (70%) of winter durum wheat samples formed ‘length of head’ in the range of 6.5–7.5 cm. In 2019–2020, number of spikelets per head ranged from 17 pcs. up to 24 pcs. The trait ‘kernel weight per head’ of the studied collection samples varied from 0.77 g to 2.08 g, all the samples had different kernel sizes. The trait ‘number of kernels per head’ varied from 22 pcs. (the variety ‘Novinka 4’) up to 51 pcs. (the sample ‘1015/16’). The trait ‘1000-kernel weight’ in the trial ranged from 23.9 g to 49.0 g, the standard variety had 34.1 g. The productivity of the collection samples was formed due to 1000-kernel weight and kernel weight per head, the correlation coefficients for these productivity elements being r = 0.45 ± 0.07; r = 0.35 ± 0.07.

Methods. The current study was conducted in 2018–2020 on the experimental plots of the FSBSI “Agricultural Research Center “Donskoy” in order to estimate the effect of sunflower as a forecrop on the formation of productivity and quality traits of the winter common wheat varieties in the south of the Rostov region. There have been studied 13 winter common wheat varieties developed by the FSBSI “ARC “Donskoy”. The variety ‘Ermak’ was taken as a standard.
Results. Through the years of study, the new winter bread wheat varieties ‘Razdolie’, ‘Donskaya step’ and ‘Rubin Dona’ had a higher realization of the genetic potential, which provided yields at the level of 5.30–5.78 t/ha, which was on 0.50–0.98 t/ha higher than that of the standard variety ‘Ermak’, and 0.46 t/ha with НСР05. The variety ‘Aksiniya’ had the smallest (66.0 cm) value of the trait ‘plant height’. On average for 2018–2020 there were dominated the varieties of medium-low height (from 66.0 to 80.0 cm). According to the trait ‘1000-grain weight’ the varieties ‘Aksiniya’, ‘Etyud’, ‘Donskaya step’, ‘Yubiley Dona’, ‘Zodiak’ and ‘Rubin Dona’ were of medium-size with 35.68–38.12 g, the standard variety ‘Ermak’ had 36.24 g. According to the trait ‘protein percentage’ the variety ‘Aksiniya’ corresponded to the 1-st class of quality (> 14.50%). According to the trait ‘gluten content’, the studied varieties ‘Tanais’, ‘Zernogradka 11’, ‘Aksiniya’, ‘Nakhodka’, ‘Etyud’, ‘Shef’, ‘Donskaya step’, ‘Yubiley Dona’, ‘Zodiak’, ‘Rubin Dona’ corresponded to the 2-nd class of quality (28.0–32.0%). The volume of bread yield ranged from 557 cm3 for the variety ‘Yubiley Dona’ to 683 cm3 for the variety ‘Aksiniya’, and 643 cm3 for the standard variety ‘Ermak’. Productivity had a positive average correlation with the trait ‘plant height’ (r = 0.59, p < 0.05) and a weak correlation with ‘heading stage’ (r = 0.20, p < 0.05) and with ‘gluten deformation index’ (r = 0, 22, p < 0.05). Productivity also negatively correlated with protein and gluten content in grain (r = -0.67 and r = -0.64, p < 0.05) and with kernel hardness (r = -0.27, p < 0.05).

Relevance. The plants treated and modified under the influence of a physical mutagen of the Co⁶⁰ isotope at doses of 500, 1000, 5000, 10000, 20000 and 30000 r were grouped into types. Changes in such economically valuable features as yield per one bush, fiber yield, weight of raw cotton in one boll and fiber length under the influence of the Co⁶⁰ isotope in experimental optionss were studied. With an increase in the dose of gamma rays, an increase in fiber yield was observed. In the AzNIHI-195 variety, when exposed to a lower dose of gamma rays (500 R) on seeds before sowing, the fiber yield was 35.9%, at a high dose (30,000 R) — 37.2%. Fiber yield varies depending not only on the variety, but also on the placement of the bolls on the bush. Forms with short and long fibers selected according to various options are of particular importance as a starting material and on their basis, in the next generation, it is possible to select forms with long fibers. The resulting economically valuable forms will be used as starting material in breeding work.
Methods. The research studied the change in the mass of raw cotton of one boll under the influence of gamma rays on seeds. The results of the impact of gamma rays on the seeds of varieties AzNIKHI-104 and AzNIKHI-195 in M 1 shows a change in the mass of raw cotton in one boll. On this basis, sharp differences were obtained both in the effect of different doses of gamma rays among themselves, and in comparison with the control option. In the variety AzNIKHI-104 in M1, the obtained differences were at the ranges of 0.2–0.9 gr. At a high concentration of mutagens, a sharp change in the average weight of one boll was observed.
Results. In both varieties, an increase in the dose of the mutagen leads to an increase in both the mass and the yield of raw cotton fiber, while the yield of raw cotton in one bush decreases. When exposed to high doses, low-yielding, semi-sterile and sterile plants are obtained, and the length of the fiber increases at low doses. A similar result is observed in both cotton varieties.

Relevance. The cocksfoot (Dactylis glomerata L.) remains an agricultural crop of high fodder value for the Komi Republic, grown both in pure form and as one of the components in grass mixtures. This forage grass is recommended for use in hayfields and pastures, being high-yielding, retaining for a long time in grass mixtures, growing quickly after mowing and grazing.
Methods. In the collection nursery of the Institute of Agrobiotechnology named A.V. Zhuravsky of the Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences (Komi Republic, Syktyvkar), from 2016 to 2018, promising populations of cocksfoot of various ecological and geographical origin were studied by economic characteristics and parameters of adaptability, obtained from the world collection of Federal research center «N.I. Vavilov all-Russian Institute of Plant Genetic Resources – VIR»: 11 from the Northwestern Federal District of Russia (Komi Republic, Arkhangelsk, Pskov and Leningrad regions), 3 from the Ural Federal District (Tyumen and Sverdlovsk regions), 1 from the Siberian Federal District (Tomsk Region), 4 foreign samples from Northern Europe (Norway, Finland) and North America (Canada). The purpose of the research is to evaluate the yield indicator of green mass of specimens of cocksfoot in the collection nursery, to establish the parameters of adaptability and, on their basis, to select the most promising numbers for further breeding work. During the growing season during the years of research, various meteorological conditions were noted, which reflected the unstable nature of the fallout and distribution of precipitation, which made it possible to comprehensively evaluate the specimens of the cocksfoot and give them a more objective assessment based on the prevailing external environmental conditions.
Results. As a result of research, it was found that according to a set of economically valuable parameters, specimens 45945, 47268 and 41826 were identified with a yield of green mass on average for two cuttings of 205–237 c/ha. Based on the obtained parameters of adaptability, specimens 36684, 47268, 33392 are classified as the most stable and plastic ones, which represent a valuable source material for further study and breeding work.

The Galega orientalis, growing in one place for many years in a row, accumulates many different diseases and insect pests in its agrobiocenosis and the seed productivity of the crop decreases, so comprehensive protection of crops is relevant. The accounting platforms were laid on the experimental field of the Vologda State Agricultural Academy in 2012 on the Gale variety. The soil of the site is sod-slightly podzolic, medium loamy, with a capacity of the arable horizon of 20–22 cm and a humus content of 2.6%. Observations of diseases and pests were carried out during the entire growing season of the Galega orientalis — from May to September once a decade. The collection of insect pests was carried out with an entomological net, based on samples in 10 strokes, which corresponded to the density of insects per 1 m2. Diseases such as peronosporosis, powdery mildew and rust with an average number of 5–9 specimens per 1 m2 were detected on Galega orientalis. The pests were dominated by nodule weevils of the genus Sitona, clover seed eaters of the genus Apion and grass bugs, with a number of more than 10 specimens per 1 m2. The integrated protection of the eastern goat patch included weeding of experimental plots from weeds, spraying of crops: from diseases in the regrowth phase of the eastern goat patch — with the fungicide "Falcon" with a consumption rate of 0.6 l/ha, from pests in the budding phase of the culture — with the microbiological preparation "Bitoxibacillin" with consumption rates of 2, 3 and 4 kg /ha. A sufficiently high efficiency of the fungicide "Falcon", CS (suspension concentrate) with a consumption rate of 0.6 l/ha — 80.9–91.7% has been established. The effectiveness of the drug "Bitoxibacillin" with a consumption rate of 4 kg / ha was 89.5–92.5%.

The article presents the results of studies of the effect of mineral fertilizers on the background of manure on the yield of garlic culture. During the research to determine the rate of nitrogen fertilizer in crop production (especially for vegetable, melon crops and potato plantings) it is necessary to take into account the amount of mineral nitrogen that is formed in the soil. Therefore, the more fertile the soil, the more nitrogen it contains. The amount of nitrates accumulated in the product is closely related to the speed of the process occurring in the soil layers as the mineralization of organic residues in the soil and an increase in the amount of nitrogen easily absorbed by plants, along with the dose of fertilizer applied to the soil. In this case, the main problem of using agrochemicals is their direct correct application of both organic and mineral fertilizers and optimization of the balance. In other words, the main goal is to achieve an environmentally friendly, safe, high yield of vegetable, melon and potato crops, preventing contamination of the product with nitrites and nitrites, the use of manure and a dose of mineral fertilizers is not only one of the most important elements for increasing the yield of winter garlic, as well as improving the mineral composition of the soil. Therefore, for the first time in the zone, the correct determination against the background of manure and doses of mineral fertilizers is one of the urgent tasks. In this regard, we conducted studies to determine against the background of manure and doses of mineral fertilizers and their effect on the yield of garlic culture. The highest yield was obtained in the Background + N₆₀P₉₀K₆₀ variant, respectively, 175.3 c/ha, an increase of 74.0 c/ha or 74.0%. Based on our field studies, we can conclude that in order to obtain a high and high-quality harvest of winter garlic and restore soil fertility on chestnut irrigated soils of the Ganja-Kazakh zone of Azerbaijan, it is recommended that farmers use 20 tons/ha of manure and mineral fertilizers in the norm of N₆₀P₉₀K₆₀ kg/ha per year.

Relevance and methods. During the period of mass flowering — fructification 20 collection samples of eggplant of various origins were studied for some photosynthetic and biochemical parameters in the conditions of the Apsheron Peninsula of Azerbaijan Republic. On the basis of the conducted research, samples characterized by a high leaf area (1470,3–1810,1 cm2/plant), high content of total chlorophylls (94,8–104,3 mg/plant) in the leaves and dry matter in fruits (6,2–1,9%) were selected. The size of the leaf area was determined by a portable device L1–3000 C, the content of chlorophyll in the leaves was determined by the device SPAD-502 Chlorophyllo-meter, the content of dry matter and nitrates was determined by the method of A.I. Ermakov.
Results. It was revealed that the varieties selected for photosynthetic parameters were also characterized by high productivity. Comparative characteristics of collection samples showed that the results obtained by assessing the dry matter content in eggplant varieties were higher compared to standard variety (6.2–11.9% contrary to 4.9%). Тhese distinguished samples are recommended for use by selectionist in further selection. At the same time, it is recommended to pay special attention to sample 148 (AFN-28), which exceeds the standard variety Zakhra by 2.43 times in dry matter content, 2.49 times in leaf area, and 3.30 times in total chlorophyll. It was also found that the content of toxic substances — nitrates in the fruits of the studied collection varieties was lower than the maximum acceptable concentration (MAC) provided in the regulations of the Ministry of Health of Azerbaijan Republic (24.0–82.5 mg/kg contrary to 300 mg/kg), which indicates that these samples can be used to produce eco-friendly eggplant products.