Vol. 2 No. 10 (2020)

In Jondor region, cotton is damaged by more than 200 types of pests. One of the most common is turnip moth (Agrotis segetum), harmfulness of which reaches up to 18%. To preserve cotton from damage by turnip moth (Agrotis segetum), a complex system of measures is used, among which the leading place as the safest pest control measures is taken by agrotechnical combating methods that include changes of main environmental factors, inhibition of the development of pests and improvement of cotton growing conditions.

The article presents materials on the study of cicadas Psammotettix striatus (L.) and Psammotettix dubovskyi Vilb. in Fergana Valley, their morphological and biological abilities, systematic position, distribution, harmfulness, food connections  and peculiarities their diagnosis.

The article provides information from the literature on cutting, transportation, sorting, inspection, washing, immersion (blanching), desulfurization, dehumidification, drying and storage of dried plum varieties. In particular, during drying, stoves and ovens must be constructed in a manner that fully meets fire safety requirements. Those who work with caustic soda should also be provided with special gowns, shoes, respirators, goggles and gloves.

In recent years, all over the world, special attention is paid to plants with sweet taste, but not having a negative effect on human health. In developed countries, 6-7% of stevia side is obtained from stevia leaves, which have a sweet honey taste. Which are widely used in confectionery farms. Stevia extracts are over 300 times sweeter than sugar. Also, in the composition in the leaves of stevia contains vitamin C, B1, B2, PP, which is very important for human health. In the experiment, comparatively high indicators for the content of vitamin "B2" 36.0 mg / 100g were noted when using mineral fertilizers in N50 P175 K50. In agriculture, improving and maintaining the quality of products is one of the main tasks. In this regard, all field trials require the study of product quality. In Stevia, the quality of the food depends to a certain extent on the chemical composition of the plants. That is, the content of mineral substances and vitamins in the plant.

Morphological features of melissa officinalis, flowering dynamics, attitude to environmental factors have been studied in the conditions of Termez city of the surkhandarya region. Melissa officinalis in the conditions of introduction was recommended for cultivation in the conditions of introduction, taking into account the ability to multiply from seed, its resistance to high and low temperatures, its non-harmfulness with diseases and pests.

In the soil and climatic conditions of the Surkhandarya region, the biological characteristics of the tropical plant S. rebaudiana at the stages of ontogenesis have been studied for the first time. The regularities of growth and development, the timing of the onset of the phases of budding, flowering, fruiting during the propagation of plants by seed have been established.

The article is given that the impact of planting date and methods on the growth and development of oilseed flax variety "Bahorikor" in the conditions of typical irrigated sierozem soils of Tashkent region is studied in practice. Experiments have shown that when the Bahorikor variety is planted early (March 1) in a row with a row spacing of 15 cm, it creates a favorable environment for the growth and development of plants.

The article presents the results of testing the microbiological preparation HELITEC against cotton bollworm on beans.

The results of the experiment showed that in the experimental variants against the first generation, in two farms treated with Helitec at a rate of 0.300-0.400 l / ha with a liquid consumption of 300 l / ha, the biological efficiency was, respectively, on the 14th day after treatment, 96.0-93, 0%.

The advantages of the microbiological method are both the possibility of prevention and their safety for humans, warm-blooded animals and the environment.

In this article presents the results of research of pests in medicinal plants grown in the Uzbekistan. During the study, polyphagous and oligophagous pests were found in medicinal plants, worm (orexotvorka), cotton nightshade, marmara nightshade,thrips, mint flea, rosemary baridi, rosemary juice, rosemary stalk, valerian juice.

The article presents data on the study of the influence of varietal characteristics, timing of growing potatoes and plant placement patterns on the yield and quality of potato chips. It was established that tubers of the Ramona variety are more suitable than Surkhan-1 because of the content of more dry matter and starch. It is noted that during spring planting and with a sparse planting pattern of seed tubers, the tubers contain more dry matter and starch. This contributes to a higher yield and quality of the prepared chip.

The article describes the results of research on the selection of varieties suitable for the soil and climatic conditions of the Republic of Uzbekistan based on the study of samples of the world collection of wheat in the breeding process and the creation of new varieties and primary selection by mixing them with one variety.

Field researches in 2018-2019 at "Urin-Bahrom-Bekzod" farm, located in Jondor district of Bukhara region, showed that number of eggs of turnip moth reduced by 3 times and caterpillars – by more than 6 times in the result of Kotoran treatment on April 10th in the process of cotton sowing, 10-15 days before turnip moth’s mass oviposition (by 30 metres tape-method with PGS-2.4 tractor in proportion 0.4 kg/ha or 12 l/ha) ( Table 1 ).

The article analyzes the current archive materials and scientific literature that the expansion of irrigation networks in Ferghana region is a priority for the agricultural sector.

The article presents in detail the mechanical composition of gypsum-sierozem, meadow-sierozem, sierozem-meadow, meadow, meadow-swamp soils and saline soils of different levels in the Zarbdor district of the Jizzakh region. Based on the data obtained, it has been given that, in terms of the amount of coarse dust and fine sand fraction, the soils of the region are dominated by medium, heavy and light sands, sometimes shown to ease up to scattered sand.

This article developed scientifically based proposals and practical recommendations for improving the economic base for the development of vegetable growing in the context of agricultural modernization.

Laurocerasus officinalis (a synonym for the name Prúnus laurocérasus according to the old classification) - medicinal laurel has bactericidal properties, that is, it releases a wide variety of volatile substances, including phytoncides, which cleanse the environment from microbes and bacteria, and improve the microclimate. Due to these properties, this plant has high sanitary and hygienic properties. Based on this, cherry laurel is recommended for wide target cultivation. And for this it is necessary to develop the most effective methods for propagating this tree. The method of microclonal propagation of the apical meristem part of shoots in vitro is proposed for use