The main goal of the research was to study greenhouse tomato hybrids under hydroponic greenhouse conditions and to enhance the agro economic properties of tomato hybrids, offering farmers the hybrid that ensures high efficiency of tomato cultivation under hydroponic greenhouse conditions. During the vegetation period, phenological observations, biometric measurements, and crop counting were performed. Producing and selling vegetables in the local market is the primary activity of greenhouses and tomatoes occupy a significant place in vegetable production. In recent years, various varieties and hybrids have been imported into Armenia, most without testing. Tomato cultivation in greenhouses occupies a leading place in Armenia. The greenhouse tomato hybrids Merlis, Plumola, and Endeavor were researched.

A novel recipe and production technology for sugar confectionery, specifically marmalade, has been developed through scientific and experimental research. The findings affirm that pumpkin and sea buckthorn purees can effectively substitute traditional plum and apple purees, eliminating the need for various coloring agents. The suggested product represents a domestically-produced marmalade, particularly in the food market, and this endeavor will play a crucial role in advancing both marmalade production and the development of the raw material base.

Cars have become an integral part of human civilization today. In developed countries, it is not only regarded as the main form of transportation, but also as a basic component of daily life. In spite of the rapid progress in motorization at the beginning of the 21st century, its apparent optimism brought tangible negative consequences as well. The study indicates that due to the sharp increase in the number of vehicles, loads on Yerevan, s roads have increased. The efficiency of transport use has decreased, whereas accidents, traffic jams and kneading have became more frequent. In 3-4 years, a transport collapse is inevitable if appropriate measures are not taken. To improve the traffic management, it is necessary to develop a strategy and implement a set of measures to improve the road network, especially road traffic, by using modern technologies, since expanding the road network is expensive, laborintensive, and not always possible.

Brucellosis is endemic in Armenia. Test slaughtering is used to fight Brucellosis in large and small ruminants. Cross-contamination among the various types of animals with various types of causative agents may contribute to the permanent existence of the epizootic chain. A study is being conducted to determine whether brucellosis is present among stray dogs in Yerevan (Capital of RA). The Rose Bengal test (RBT), serum agglutination test (SAT), and indirect and competitive ELISA tests were performed on 384 blood samples from stray dogs in Yerevan. The competitive ELISA detects only specific antibodies against B. abortus, B. melitensis, and B. suis and differentiates the Brucella 19 strain. According to the diagnostic algorithm for final diagnosis, positive samples by RBT must be confirmed by two other tests. Out of 384 samples tested by RBT, 17 (4.4 %) were positive. Out of 384 samples, 11 (2.9 %) were positive by SAT, 9 samples (2.3 %) tested positive by indirect ELISA, and 16 samples (4.2 %) tested positive by competitive ELISA. We have shown the presence of Brucella spp. among stray dogs in Yerevan. It is necessary to implement additional studies among dog (particularly shepherd dogs) populations in marzes with a higher prevalence of Brucellosis. These additional results will provide an opportunity to evaluate the role of dogs in ensuring a stable epizootic chain of Brucellosis among agricultural animals. They will contribute to a strategy design for preventing the spread of disease.

The study aimed to assess 58 veterinary laboratory specialists' knowledge, attitudes, and practices concerning brucellosis across all regional (Marz) and central laboratories (Reference Laboratory for Especially Dangerous Pathogens). The survey was developed to assess the knowledge of lab specialists and identify gaps in laboratory activities that may have an impact on test results. Questions covered the following topics: a) disease epidemiology, b) sample conditions, c) biosafety and biosecurity, and d) laboratory tests, requirements, and indicators. According to the results, 45 % of respondents are 51 years old or older, most (26 respondents/45 %) have six to ten years of laboratory experience, and 20 respondents (35 %) have 21 years and more experience. Eleven people (19 %) had not received professional training. At the same time, 90 % and more correct answers were given by respondents who had passed training during the last year. In the last year, a person took training but did not answer 90% of the questions correctly. Most part (86 %) of respondents were not familiar with lab test indicators (sensitivity, specificity, accuracy, etc.) and 46 (79 %) were unaware of screening and confirmation tests requirements. Only 55 % (32 people) knew that one serological test was insufficient to make a final diagnosis, but 24 (75 %) of those respondents could not justify that. This study shows that it is necessary to review the current mechanisms for the preparation of laboratory specialists. This will indirectly impact an accurate assessment of the epidemiological situation of brucellosis in Armenia.

Using research findings, it was determined that each strain exhibits distinct morphological, biochemical, and tinctorial attributes that are intrinsic to its particular classification. Remarkably, the API test proficiently categorized the subtypes of these strains, achieving an exceptional precision rate of up to 99.8 %. The following strains of microbes have been isolated during this study: E. coli, Salmonella Typhimurium, Staphylococcus spp., and Proteus mirabilis. The results of analyses conducted through the discօ diffusion technique reveal a diverse spectrum of antibiotic resistance profiles among the multiple strains isolated from poultry, encompassing 28 antibiotics originating from Italy. The acquired data are of significant scientific and pragmatic value. This underlines the need for specific emphasis on strains manifesting pathogenic traits, particularly those demonstrating multidrug resistance involving three or more distinct antibiotics. The importance of understanding and managing antibiotic resistance in avian microbial populations is underscored by this imperative.

In recent years, in Armenia, meat has become more important than other food-producing directions of sheep breeding, which is due not only to lower costs and the demand for the domestic market but also to the export of many sheep from the republic. Consequently, foreign breeds of mutton, such as Dorper, Hisar, Romanov, Blanch Central Massif, etc., began to be imported and bred in Armenia due to their profitability. On October 20, 2021, Blanche sheep from the Central Massif was imported to the Balahovit ANAU experimental farm. A sheep was mated with a female weighing 80 % of the live weight of an adult queen, about 45-50 kg, and a male weighing 80-85 kg. There was an average or above-average fat level in the animals. Live weight, the amount of feed needed, the level of feed intake, the ability to adapt to weather conditions and reproductive performance were studied. Methods used in animal husbandry were used in the studies. When the animals were moved, they lost about 2.6 % of their weight during the initial period. However, it was restored within a short time. Females gained 365 g in March 2022, and males gained 450 g, which is an excellent indicator. A kilogram of weight gain costs 5.15 EFU. The pregnancy rate was 136 %, and the inter-calving period was 271-320 days, which made it possible to provide three births in two years.

Our research aimed to create a novel lactose-free sour milk product. This would be attractive for local producers and give new possibilities for the development of the dairy industry. The new product consists of two ingredients: yogurt and ricotta. Lactose-free yogurt technology has been developed for the first component production.Yogurt with 3 different curds has been produced and subjected to physicochemical and organoleptic testing. Bacterial culture consisting of Lactobacillus delbrueckii subsp. Bulgaricus and Streptococcus thermophilus were added in quantities of 100 units per 250 liters milk. The dose of lactase enzyme has been determined to decrease lactose content to 0.01 %:0.48 ml/l Ha-Lactase 5200 NLU. Technological parameters have been developed to ensure higher yield and faster protein separation for ricotta production. Three samples with different proportions (yogurt/ricotta) have been produced to obtain a product with a pleasant taste, aroma, and homogeneity for consumers. As a result of the organoleptic examination of the obtained samples, the optimal ratio has been defined as 90:10. Buckthorn puree was used as a natural additive. The food recipe has been developed, energy value and cost value have been calculated, and the titratable acidity of the food has been investigated.

The use of genetic methods seems to have briefly pushed back the use of culture methods. Currently, a new technique developed based on the latter – culturomics, enables the discovery and study of expanded bacterial diversity using a large number of culture conditions and media. This study aims to investigate the influence of heat shock on the qualitative and quantitative content of cultivable gut bacteria of Lehmann Brown chickens from the “Arax” chicken factory.The chickens (5 months old, weighing 1.4-1.7 kg) of the “Arax” poultry factory in Armenia were transferred to a sterilized test room with the necessary conditions. After four days of maintenance in a new environment (temperature 25 0C), fecal samples were taken from the hens. After that, the hens were kept at 35 0C for a day, followed by another sampling conducted a day later. The current investigations have emphasized that the bacterial number and diversity of hen gut microbiota undergo changes under the influence of heat stress.

Over the recent 20 years, for the first time, the disease of swine perfringens has been studied in the Aragatsotn region of RA and related epidemiological analysis has been conducted. To identify A, C, and D serological types of Cl. Perfringens and special diagnostic sera produced by the Kursk biofactory were used. It has been found that the main serological infection type of swine perfringens is C and sometimes A and D subtypes. In the pig breeding farms of the mentioned region about 6887 heads of swine (aging from 3 days to 1 year old) were registered. Per the research results, about 45 out of 72 communities were recognized as insecure/vulnerable. As to the above-stated animal number, it should be mentioned, that 1722 heads of swine fell down, whereas 5510 were considered bacteria carriers. Thus, as a result of epidemiological analysis, the morbidity (bacteria carrying rate), mortality, insecurity/vulnerability, and focality coefficients (indicators) have made 0.80 (80 %), 0.25 (25 %), 0.63 (63 %), and 122 animals, respectively.