Relevance. The adaptive-integrated plant protection system is the basis of biologized protective measures against harmful organisms. This system provides for careful treatment of natural resources, prevents contamination of soil and water with pesticides and agrochemicals. In recent years, legislation and sanitary regulations have increasingly tightened the regulations governing the use of pesticides in crop production. Organic farming is becoming increasingly common. Leading global chemical companies are expanding their research on the biology of manufactured plant protection products: they give them a selective character, reduce the period of their inactivation, respectively, the waiting period. FMC manufactures and supplies to Russia new generation insecticides Verimark® and Benevia® from the chemical class of diamides compatible with the biomethode and having a short waiting time.Methods. In 2020-2021, in the greenhouse complex of the FSVC, an assessment of the biological effectiveness of the insecticides Verimark® and Benevia® on cucumber culture has been carried out. Verimark® was applied by shedding seedlings under the root and applying through a drip system, Benevia® was introduced by ground spraying of vegetating plants.Results. The most problematic cucumber pests in greenhouse are tobacco trips (Thrips tabaci) and greenhouse whitefly (Trialeurodes vaporarium). As a result of successive additions of the Verimark® (for the root) and Benevia® (for the leaves), the number of tobacco thrips was reduced by 90,8-98,9%. Spraying the plants with Benevia® in admixture with Codacide oil also provided a high positive effect against the greenhouse whitefly. Already on the third day, the number of pests decreased by 90,3%. Protective measures made it possible to increase crop yield by 26.3% in the first turnover and 28.3% in the second. The highest rates of biological efficacy were observed in the use of preparations before the start of pest settlement, which is fully supported by the recommendations of the manufacturer.

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.

In Uzbekistan, there is a demand of the population for fresh melon fruits during the off-season. In the Research Institute of Vegetable, Melon Crops and Potato for the first time studies were carried out, when grown in a greenhouse, on the vegetative grafting of melon’s Zarkhal variety on the vegetable marrow varieties used as rootstocks. The aim of the research was to study the effect of vegetable marrow rootstocks on the variability of economically valuable traits of the Zarkhal melon variety and to identify promising combinations of vegetable marrow rootstocks that increase the yield and quality of melon fruits.Methods. The studies were carried out in accordance with the guidelines of the World Vegetable Center. As a control, ungrafted plants of the Zarkhal melon variety were used. For comparison with the control, plants of this variety were grafted onto their own plants. Also, plants of the melon variety Zarkhal (scion) were grafted in combinations on 10 varieties of vegetable marrow, which served as rootstocks. Vegetative grafting of melon on vegetable marrow rootstocks was carried out “in a split” in the phase of the first true leaf when the stem diameter reached 4.1–4.3 mm and plant height 4.4–5.9 cm.Results. In comparison with the control, in combinations of grafting the Zarkhal melon variety onto the Grecheskiye 110, Unumdor, Delicates and Skvorushka varieties of vegetable marrow, the flowering of paternal and female flowers, the onset of fruit formation was observed 2 days earlier. In the same combinations, fruit ripening was observed on 81-82 days, which is 4-5 days earlier than the control (86 days). They also had the tallest plants (203-205 cm), the plants formed 2-4 leaves more than the others. Marketable yields between combinations ranged from 7.89 to 9.75 kg/m2 . The melon variety Zarkhal, grafted onto its own plants, lagged behind the control in all phases of development and yield. The early yield in combinations was from 3.95 to 5.75 kg/m2 and amounted to 53-59% of the yield. The average fruit weight varied from 785 to 810 g.

The purpose of the study. The aim of the study was to determine the effect of heterosis in short-fruited parthenocarpic F1 cucumber hybrids by the main economically valuable characteristics, when grown using low-volume technology in industrial greenhouses of the Moscow region.Materials and methods. The object of the study is short-fruited parthenocarpic reciprocal hybrids of cucumber Druzhny (F1 I73514 x I74011), F1 I74011 x I73514 and their parent inbred lines I73514 and I74011 of selection by N.N. Timofeev Breeding Station LLC. F1 SV4097CV of foreign selection of Semenis company (Netherlands) was used as a control. The study was conducted in 2020-2021 in industrial greenhouses of the "V. I. Edelstein Vegetable Experimental Station" of the K.A. Timiryazev Russian State Agrarian University-Moscow Agricultural Academy in Moscow on low-volume hydroponics in peat bags. Parental lines and hybrid combinations were evaluated by earliness, early yield, yield, number of fruits per plant, average fruit weight and marketability.Results. According to the results of the study, F1 Druzhny (F1 I73514 x I74011) and the reverse hybrid I73514 x I74011 demonstrated high positive effects of heterosis in yield (MPH=19.4...22%; HPH=13.4...15.9%; CH=9.6...12%) and the number of fruits per plant (MPH=22.5...26.4%; HPH=12.5...15.8%; CH=11.7...15%). Negative indicators of the heterosis effect were noted for earliness from germination to flowering (MPH=-3.4...-1.1%; HPH=-6.5...-4.4%; CH=-4.4...-2.2%) and average fruit weight (MPH=-2.2...-1.3%; HPH=-5.3...-4.3%; CH=-3.4...-2.4%). The value of the degree of dominance indicates the presence of positive overdominance in the inheritance of such traits as yield (hp=2.7...3.2), the number of fruits from the plant (hp=1.5...1.9) and marketability (hp=1.6...2.3). Negative overdomination was observed in earliness from germination to flowering (hp= -2...-1.3) and average fruit weight (hp=-1.7...-1.2). According to the signs of earliness from germination to fruiting (hp =0) and early yield (hp=-0.1...0.5), intermediate inheritance was revealed. The Druzhny hybrid significantly exceeded the control hybrid SV4097CV in early yield, yield and number of fruits from the plant, and the reverse hybrid F1 I74011 x I73514 was at the control level, which indicates the prospects of growing these hybrids in the conditions of spring-summer turnover on low-volume hydroponics.

Relevance. As a result of long-term research, the staff of the Department of Agronomy, Plant Breeding and Seed Production of Omsk State Agrarian University created a new variety of green beans called Marusya, which was included in the State Register of Breeding Achievements in 2015. The competitiveness of the variety is ensured by stable yields, high palatability, and the ability of green beans to maintain their economic viability over the long period. The variety is resistant to drought and low temperatures.Material and methods. The research on the variety of the green beans was conducted following the methods of competitive variety trial from 2016 to 2020. The trials were conducted on the breeding crop rotation fields of the Educational and Experimental Farm of Omsk State Agrarian University, which is located in the southern forest-steppe of the Omsk Region (city of Omsk). The following zoned varieties were used as control samples: Zolushka (Federal Scientific Center of Vegetable Farming, Moscow) and the imported Polka variety (Poland).Results. The developed agroecological passport the Marusya variety, the use of which will allow to take into account the positive effects of the genotype-environment-variety interaction to the maximum extent. When selecting bean varieties suitable for cultivation for vegetable purposes in the conditions of the southern forest-steppe of Western Siberia in industrial production and the private sector, the Marusya variety makes it possible to obtain high-quality products and expand the range of legumes in the region.

Relevance. The article analyzes the indicators of white cabbage production in Russia (by districts, subjects of the federation and categories of farms).Methodology. The object of research is the market for the production of white cabbage. The subject of the study is the current state of white cabbage production. The information base of the study was made up of data from FAO, official state statistics, the Federal Customs Service, the Ministry of Agriculture of the Russian Federation, the Ministry of Finance of the Russian Federation, Parliamentary hearings of the State Duma Committee on Agrarian Issues, the Eurasian Economic Union, the Eurasian Economic Commission, operational online messages of federal and regional levels, materials of periodicals, scientific seminars, conferences, symposiums, reflecting various aspects of the problem under study.Results. In the industrial sector of vegetable growing, the acreage of cabbage of all types in 2021, in relation to 2020, decreased by 15.8%. Over the past ten years, there has been a decrease in acreage and gross cabbage harvest in farms of all categories. There are a number of systemic problems in Russian vegetable growing that limit the increase in vegetable production and negatively affect its effectiveness: weak technical and material equipment of a significant part of farms engaged in vegetable production, outdated technical base, insufficient provision of crops with seeds of domestic production. One of the leading roles in the implementation of the policy of food security and national independence is played by the selection and seed production of white cabbage. Sanctions make it possible to carry out import substitution of varieties and hybrids of white cabbage. To date, the main task is to abandon the import of seeds of foreign selection, and therefore it is important to focus on creating new hybrids that will be of high quality, good yield, as well as resistance to diseases and pests. Modern hybrids of breeding FGBNU FNTSO and Agrofirm "Poisk" according to the results of testing in leading agricultural organizations fully meet the requirements of the market and can take a worthy place in the fields in the Russian Federation.

Relevance. Cleaning of reclamation channels is a very relevant event. The need to clean the canals and maintain them in working condition becomes obvious during the flood period, when it is necessary to remove excess water. The paper presents mathematical models for determining the performance of the PP-303 canal cleaner, a feature of which is the rectilinear movement of the bucket on rigid guides along the bottom along the axis of the canal to be cleaned.Methods. The article is formed on the basis of experimental research methods. The research was carried out based on experimental and calculated data. A network of drainage canals of the drainage system was taken as the research object, and the working equipment of the canal cleaner was taken as the research subject. Performance, which is the amount of products produced by the machine per unit of time, can be of three types (theoretical, technical, and operational) and can be determined with consideration of the design parameters of the working equipment. During the operation of trench cutting machines, their performance directly depends on the main parameter, namely, the depth of the canal being built; in the case of canal cleaning with canal cleaners, this parameter cannot be considered as the main one. This is due to the fact that siltation and sediments accumulating on the bottom and slopes of the canals during the operation of the reclamation system are extremely unevenly distributed along the length of the canal. The highest concentration and amount of sediments and siltation is observed mainly at the mouth of the canals, the junctions of canals of different levels, and the junctions of the drainage with the drainage canal. In this case, the most significant parameter is the thickness of the chips removed from the bottom and slopes of the canal by the bucket.Results. The results of the research showed that the performance of the channel cleaner, as a batch machine, is influenced by the very design of the working equipment, the main element of which is a bucket capable of moving in a straight line along rigid guides at different speeds. With obvious high values of the performance of continuous channel cleaning machines, it can be concluded that the channel cleaner RR-303 showed high values of technical and operational characteristics, mainly due to the use of a trapezoidal profile bucket.

Relevance. Trititrigia (×Trititrigia cziczinii Tzvel.) this is a new synthetic grain feed crop. The modern collection of the Department of Remote hybridization of the GBS RAS has more than 250 promising samples with a number of economically valuable features. The unique ability of trititrigia in one year to produce a stable yield of high-quality grain (3.0-3.2 t/ha) and nutritious green fodder (27.7-35.1 t/ha) allows us to recommend it for cultivation in regions with unfavorable cultivation conditions for grain crops. Promising samples should be used as donors of valuable traits in breeding for quality and adaptability in order to obtain modern high-quality and adaptive wheat varietiesMaterial and methods. The research was carried out in the Department of Remote Hybridization of the N.V. Tsitsin Main Botanical Garden of the Russian Academy of Sciences (Moscow region, village of Rozhdestveno) in 2008-2016. The objects of research were: promising long-term and grain-feed lines of trititrigia of the collection of MBG RAS. All samples of trititrigia were obtained in the department of distant hybridization in different years.Results. As a result of the research, it was found that the studied samples are stable lines with a characteristic feature for trititrigia to ripen from top to bottom, the ability to grow in one place for 2- 3 years under favorable conditions, as well as the ability to regenerate after harvesting for grain or mowing for green mass, unique for cultivated cereals. The studied samples have a productive bushi- ness of 8-20 stems per plant. The length of the main ear consistently exceeds the Moscow winter wheat standard 39 and averages 12-13 cm, in which 41 to 97 grains are formed. The grain yield in the competitive variety testing during the research was 3.2-4.1 t/ha, the mass of 1000 grains was 30.1-39.8 g. The Pamyati Lubimovoy variety, selected for a number of economically valuable characteris- tics, passed State registration and became the first trititrigia variety registered in the territory of the Russian Federation.

Relevance. Pepper is sensitive to chilling temperatures in all growth stages and low temperatures are main factors affecting plant growth, fruit growth and development and productivity. Evaluation and identification low temperature (LT) tolerant pepper genotypes at different growth stages is actual in breeding program for developing new cultivars. In present study we investigated the effect of the leaf cold damage within 25% (LCD) after chilling treatment in seedling stage on vegetative and reproductive traits of pepper accessions with different cold tolerance.Material and methods. In this study two pepper accessions “PE-J-2” and “Neokgwang” selected as chilling tolerant and susceptible in juvenile stage (3-4 true leaf stage), were used respectively. The seedlings of the selected pepper accessions with 25% visual cold damages of leaf green part (become lightly yellowed-whited or desiccated-dried) and control non-treated (NT) were grown in a glasshouse condition (D/N 30-32/22-24°C) for 10 weeks to evaluate the effect of LCD on pepper accessions vegetative and reproductive parameters after chilling pre-treatment. In pepper plants the vegetative parameters such as plant height (PH), leaf length (LL) and width (LW), number of internodes (NI), length of main axis (LMA), plants fresh weight (PFW) and roots fresh weight (RFW), and reproductive the number of flowers (NFL) and fruits (NFR), fruit set ratio (FS), fruit length (FL) and diameter (FD), total yield per plant (TY) were measured. The experimental design of this study was completely randomized. Statistical analysis was performed using the SAS Enterprise Guide 7.1 (SAS Institute Inc., Cary, North Carolina, USA).Results. According to the research result several accessions were identified: the accessions screened in juvenile stage as cold tolerant cannot always manifest good some agronomical traits performance at growth stages and it may range depending on the genotype specific features. The seedlings with LCD within 25% may significantly affect the vegetative and reproductive parameters of pepper plants. The phenomenon was recorded more distinctive in the correlations between some vegetative and reproductive parameters among NT and LCD plants.

Relevance. In onion breeding, quickly obtain aligned material is an urgent target for create parent forms of heterosis hybrids. Using classical methods with helping of backcrosses, this is achieved in 10-12 years. Using the technology of doubled haploids, it is possible to reduce these terms several times, and also to avoid the manifestation of inbred depression when obtaining lines by self-pollination. At the same time, the most effective in the production of haploids is the use of whole flower buds as an explant, unlike ovules and ovaries, the production of which is more time-consuming and labor-intensive.Methods. The doubled onion haploids were obtained by the method of ovule culture on the basis of the biotechnology laboratory of the Gavrish Breeding Center using the technology that based on the methodological recommendations of Monakhos S.G. et al., 2014. DH–onion plants with a developed root system and leaf apparatus were planted in the open ground and grown according to the technology generally accepted for the zone at the sites of the Gavrish breeding center, Krymsk, Krasnodar Territory. The obtained commercial bulbs were evaluated according to the RTG/46/2 method.Results. It was obtain doubled haploids, which were tested for ploidness by flow cytometry. 40 digaploid onion plants have been created. As a result of further development after transplantation into the open ground, storage, springization and selection, 3 uterine bulbs were obtained for further reproduction and inclusion in the breeding process.