scholarly journals Integrated protection system against progressive corn diseases

2021 ◽  
Vol 262 ◽  
pp. 01015
Author(s):  
Anzor Shabatukov ◽  
Liudmila Khromova

A biologized system of integrated protection against pathogens in corn crops is an important feature to reduce pesticide load. The use of new generation chemical fungicides with a low consumption rate and a wide spectrum of action against dominant infections, as well as their manufacturing application, will contribute to the improvement of corn agrocenosis. Due to the predicted, and subsequently planned yield, the phytosanitary situation will help in the development and implementation of effective protective measures to obtain biologically cleaner production of corn grain. Seed disinfection only solves the problem of seed infection. The appearance and harmfulness of boil smut also occurs during the growing season. Therefore, the transmission of primary infection occurs by plant residues and airborne droplets, which suggests the possibility of a systemic fungicide response to effectively contain not only the causative agent of boil smut, but also other types of infectious diseases on vegetative and reproductive bodies of corn. Investigations carried out in 2018-2020 to reduce the harmfulness of blister smut and fusarium head smut showed that seed infections are caused by a pronounced prevalence of diseases of roots, stalks and ears, such as fusarium, boil smut, alternaria, bacterial leaf burn, etc. The resistance degree of cross-breeds to dominant diseases depends on the infection terms, weather and climatic conditions and which corn body is more susceptible to these pathogens. Considering the possibility of infection penetration during the post-emergent period of corn development it is required to use system fungicides with a low consumption rate and prolonged action. In the Kabardino Balkarian Republic, the dominant corn disease is boil smut. It is known that the harmfulness of boil smut is higher with cob forms than with stem, leaf forms of infection, but in 2020 only the cob form of the disease was recorded, the dry and hot weather was the reason for this. In the steppe zone of the Kabardino Balkarian Republic, it is more expedient to use effective fungicides in the developed complex protection of corn crops against progressive harmful bodies.

Author(s):  
А.В. Терешкин ◽  
А.Л. Калмыкова ◽  
Т.А. Андрушко

Вертикальное озеленение с участием различных видов лиан в современных условиях имеет важное эстетическое и санитарно-гигиеническое значение. Особо актуально решение вопросов обогащения флоры городских территорий лианами в степных районах в связи с бедным видовым составом и резким ухудшением экологической ситуации. Объектами исследований являлись 7 видов лиан, различных жизненных форм (однолетние, многолетние), произрастающие в населенных пунктах Саратовской области (Аткарск, Саратов). Цель исследований – изучение эколого-биологических особенностей и мелиоративных свойств лиан и выявление перспектив их использования в вертикальном озеленении селитебных территорий Саратовской области. В ходе исследования видового состава, были выявлены наиболее популярные виды однолетних лиан: ипомея красно-голубая (Ipomea tricolor (L.) Roth) и ипомея пурпурная (Ipomea purpurea (L.) Roth), горошек душистый (Lathyrus edoratus L.), настурция (Tropacolum peregrinum L.) и фасоль огненно-красная (Phaseolus coccineus). Большинство (70%) из них произрастают в местах ограниченного пользования. Изученные виды лиан в исследуемых регионах достигают средних природных показателей (при наличии надлежащего ухода), обладают хорошими показателями жизненного состояния, обильно цветут и плодоносят. При воздействии токсикантами различной концентрации на листовые пластинки лиан установлено их степень устойчивости. Выявлено, что однолетние лианы лучше использовать в декоративных целях, а не в санитарно-гигиенических. Сравнительная оценка однолетних видов с многолетними лианами (девичий виноград пятилисточковый и клематис тангутский) показывает устойчивость многолетних видов (в среднем на 3 балла - 40%). Разработаны варианты декоративных композиций с участием травянистых лиан. По степени декоративности выделены однолетние лианы – Ipomea tricolor, I. purpurea (37 – 41 балл), средней степенью отличаются – Lathyrus edoratus (33 балла), Tropacolum peregrinum (30 баллов) и Phaseolus coccineus (20 – 27 баллов). Преимущество многолетних лиан заключается в их устойчивости к резким изменениям климатических условий (на 40 %) по сравнению с однолетними формами. Поэтому они более предпочтительны для озеленения городской среды. Для усиления декоративного эффекта в сезонном аспекте рекомендуются сочетать расширение видового и формового разнообразия растений (многолетние и однолетние лианы, древесно-кустарниковая, цветочная растительность). Установлено, что природно-климатические условия зоны степи и лесостепи в пределах Саратовской области являются достаточно благоприятными для нормального роста и развития древесно-кустарниковой растительности, в том числе травянистых лиан. Таким образом, обоснованное применение древесных лиан в комплексе с традиционными видами насаждений позволит создать комфортные условия проживания населения, регулировать оптимальный температурный баланс и создавать благоприятные микроклиматические условия. Vertical gardening with different types of vines in modern conditions is important aesthetic and sanitary-hygienic value. It is especially important to address the issues of enrichment of the flora of urban areas with vines in the steppe regions due to poor species composition and a sharp deterioration of the ecological situation. The objects of research were 7 species of lianas, various life forms (annual, perennial), growing in the settlements of the Saratov region (Atkarsk, Saratov). The aim of the research is to study the ecological and biological features and reclamation properties of vines and identify the prospects for their use in vertical gardening residential areas of the Saratov region. In the study, species composition was the most popular species of annual vines: morning glory red-blue (Ipomea tricolor (L.) Roth) and purple morning glory (Ipomea purpurea (L.) Roth), the fragrant pea (Lathyrus edoratus L.), nasturtium (Tropacolum peregrinum L.) and runner beans (Phaseolus coccineus). Most (70%) of them grow in restricted areas. Studied species of vines in the study regions reach average natural performance (with proper care), have good indicators of vital condition, bloom abundantly and bear fruit. When exposed to toxicants of different concentrations on the leaf blades of vines established their degree of stability. It was revealed that the annual vines are better used for decorative purposes, and not in the sanitary-hygienic. A comparative assessment of annual species with perennial vines (maiden grapes and clematis Tangut) shows the stability of perennial species (an average of 3 points-40%). The options and decorative compositions with the participation of herbaceous vines. According to the degree of decoration of the allocated annual vine – Ipomea tricolor, I. purpurea (37 – 41 points), the average degree of differ – Lathyrus edoratus (33 points), Tropacolum peregrinum (30 points) and Phaseolus coccineus (20 to 27 points). The advantage of perennial vines is their resistance to sudden changes in climatic conditions (40 %) compared to annual forms. Therefore, they are more preferable for greening the urban environment. To enhance the decorative effect in the seasonal aspect, it is recommended to combine the expansion of species and form diversity of plants (perennial and annual lianas, tree and shrub, floral vegetation). It is established that the climatic conditions of the steppe and forest-steppe zone within the Saratov region are quite favorable for the normal growth and development of tree and shrub vegetation, including herbaceous lianas. Thus, the reasonable use of wood vines in combination with traditional types of plantings will create comfortable living conditions for the population, regulate the optimal temperature balance and create favorable microclimatic conditions.


2020 ◽  
Vol 62 ◽  
pp. 39-47
Author(s):  
A. I. Lokhova ◽  
E. Z. Savin ◽  
A. M. Rusanov ◽  
A. A. Mushinskiy

The article presents the results of studying the diversity of pear rootstock forms in terms of yield and seed productivity. The research was carried out at the experimental sites of the Orenburg Experimental Station of Horticulture and Viticulture of AllRussian Horticultural Institute for Breeding, Agrotechnology and Nursery and the Botanical Garden of the Orenburg State University in 2017-2019, in typical soil and climatic conditions of the Orenburg city. The purpose of the study is to identify pear rootstock forms characterized by high yield and stable seed productivity for use in the future as a seed rootstock. During the research, 15 pear accessions were studied; the planting scheme was 6x4 m. As a result of research, it was found that the rootstock form Temno-zelenaya is characterized by a high yield (40 kg/tree). High seed productivity of more than 6 seeds in one fruit was observed in samples: Vernaya (6.0-6.5 pcs.), SK-1, SK-3 (6.1-7.8 pcs.), SK-2 (7.0-7.5 pcs.), Chang Bai Li (7.4-7.7 pcs.), Semennaya 214 (7.5-7.8 pcs.). It was revealed that the Xiao he Bai Li variety is characterized by the maximum weight of 1000 seeds (65.2 g). Analysis of accessions by seed yield established that a consistently high yield is observed in the varieties Chang Bai Li (2.5-4.2 %), Vernaya (3.96-4.18 %) and forms SK-1 (2.0-3.25%), SK-2 (2.25-2.75 %), SK-3 (1.43-4.0 %). Pear rootstock forms Chang Bai Li, Vernaya, Semennaya 214, SK-1, SK-2, SK-3 were identifi ed, which can be recommended for production testing as seed pear rootstocks for the conditions of the steppe zone of the Southern Urals.


2020 ◽  
Author(s):  
Asma Jebari ◽  
Jorge Álvaro-Fuentes ◽  
Guillermo Pardo ◽  
María Almagro ◽  
Agustin del Prado

Abstract. Temperate grasslands are of paramount importance in terms of soil organic carbon (SOC) dynamics. Globally, research on SOC dynamics has largely focused on forests, croplands and natural grasslands, while intensively managed grasslands has received much less attention. In this regard, we aimed to improve the prediction of SOC dynamics in managed grasslands under humid temperate regions. In order to do so, we modified and recalibrated the SOC model RothC, originally developed to model the turnover of SOC in arable topsoils, which requires limited amount of readily available input data. The modifications proposed for the RothC are: (1) water content up to saturation conditions in the soil water function of RothC to fit the humid temperate climatic conditions, (2) entry pools that account for particularity of exogenous organic matter (EOM) applied (e.g., ruminant excreta), (3) annual variation in the carbon inputs derived from plant residues considering both above- and below-ground plant residue and rhizodeposits components as well as their quality, and (4) the livestock treading effect (i.e., poaching damage) as a common problem in humid areas with higher annual precipitation. In the paper, we describe the basis of these modifications, carry out a simple sensitivity analysis and validate predictions against data from existing field experiments from four sites in Europe. Model performance showed that modified RothC reasonably captures well the different modifications. However, the model seems to be more sensitive to soil moisture and plant residues modifications than to the other modifications. The applied changes in RothC model could be appropriate to simulate both farm and regional SOC dynamics from managed grassland-based systems under humid temperate conditions.


2021 ◽  
Vol 31 (4) ◽  
pp. 243-248
Author(s):  
Nassima Bakir

Most developing countries have hot climate, ordinary jobsites characterized by reduced of human resources, equipment and infrastructures. The objective of this article is to make an experimental study of the influence of the hot climate such as that of Algeria, on the different properties of concrete in the fresh state, such as excessive water evaporation from the concrete surface, increased demand for water, increased slump loss corresponding to additional water on job-site, higher plastic shrinkage cracking and difficulty in controlling air content. At the hardened state, we could mention a reduction of strength at 28 days, decreased durability resulting from cracking at long-term period. To show the problems linked to concreting under these conditions and to present the appropriate solutions concrete or mortar can withstand the conditions in which it is implemented. Thus, negative effects caused principally by hot weather concreting motivated the choice of the such study. The research experimental work conditions in which the cementitious matrix was kept concerned two different environments, namely hot and dry climate conditions (t = 40°, h = 0%) alike the climate of the region of M'sila., and that of a medium with a hot and humid environment (t = 40°, h = 100%). The output of the investigation demonstrated the crucial role of the cure method in hot regions. The comparison of results for a reference concrete kept in air without any curing measures with two curing types simulating hot weather environment of the region M’sila was undertaken. These obtained outcome results were discussed based on the influence of climatic conditions to conclude procedures for hot weather concreting and suitable cure methods.


2021 ◽  
Vol 54 (2) ◽  
pp. 57-62
Author(s):  
Daria G. Fedorova ◽  
Natalia M. Nazarova ◽  
Yulia F. Kuhlevskaya

Abstract. The work was carried out to modify the method of assessing the viability of plants, taking into account the limiting factors of the climatic conditions of the Orenburg Preduralie. Are studied several species of plants, during the introduction at the steppe zone (on example of Оrenburg). Introduction study of all taxons was carried out for 8 years (20122020). The results of visual and laboratory observations of the seasonal development of species. During the entire observation period such indicators, as lignification of shoots, heat resistance, drought resistance, winter hardiness, shoot-forming capacity, height increase, generative development, and possible ways of reproduction in culture were evaluated annually. For each indicator numerical values in points corresponding to a certain state of the plant were selected. Based on the integrated assessment, the total viability score was calculated separately for each year of observations and the average score for the observation period. The sum of the average scores is an integral numerical expression of the viability of the introduced plants. Was established that the studied species belong to the I and II group relatively the criterion of life skills. The most species and sorts are among the most promising plants for introduction.


2020 ◽  
Vol 50 (4) ◽  
pp. 66-71
Author(s):  
B. M. Ludu ◽  
B. K. Kan-ool

The paper presents the results of the research into the condition, number and concentration of beef cattle of Hereford breed, adapted to the natural and climatic conditions of the East Siberian region. The methodological basis of the study was formed by the methods of systematization, logical and comparative statistical analysis. The research information was based on the official materials of the Ministry of Agriculture and Food of the Republic of Tuva on animal husbandry. Out of the total number of livestock in the region (180 748 heads), Herefords amount to 2869 heads. A comparative analysis of livestock in farms of different forms of ownership and different natural and climatic zones was carried out. The largest population of Herefords (48.94%) is concentrated in the central agricultural and livestock zone with forest-steppe and steppe subzones (by the number of animals Piy-Khem kozhuun ranks first, 19.1%). In the southern zone of dry steppes, there are 27.43% of Herefords (by the number of livestock in the Republic, Tes-Khem kozhuun ranks second, 14.7%). In the western mountain-steppe zone there are 23.63% of Herefords, the largest number is in Barun-Khemchik (7.4%) and in Bai-Taiginsky (7%) kozhuun. Specialized beef cattle have not been brought to the high-mountain Mongun-Taiginsky kozhuun of the western zone or to the eastern high-mountain taiga zone. According to the results of the analysis, taking into account the category of farms, 56.4% of Herefords are kept in peasant farm enterprises, 19.7% – in agricultural production cooperatives, 29.7% – in other agricultural enterprises. All farms practise year-round grazing. Differences in the number of Hereford cattle by districts depend on the capacities of farms and climatic breeding zones. The monitoring which was carried out will allow to determine the prospects for raising purebred cattle of a specialized type, taking into account the terrain and zone of the breeding work in the conditions of year-round grazing in the Republic of Tuva.


Author(s):  
P. А. Ageeva ◽  
М. V. Matyukhina ◽  
N. А. Pochutina ◽  
O. M. Gromova

The narrow-leafed lupin (Lupinus angustifolius L.) is a valuable legumes crop used as forage and green manure which is adapted to wide spectrum of soil-and climatic conditions; the crop has short domestication history. The protein content in its seeds and in dry matter of green mass varies from 30.0 to 37.0% and from 16.0 to 22.0 % respectively and depends on ecotype and soil-and-climatic conditions. This lupin specie can accumulate to 300 kg/ha symbiotic nitrogen in biomass and assimilates phosphorus and potassium of heavy available soil layers. It is very technological suitable for common used machinery systems. The State List of breeding achievements of Russia recommends the following regions for lupin cultivation: the North, the North-West, the Central, the Volga-Vyatka, the Middle-Volga, the Central Chernozem, the Ural, the West Siberia and the East Siberia. The tests were carried out in 2017-2020 in the All-Russian Lupin Scientific Research Institute which is located in the South-West of the Central region. Ten varieties and breeding lines bred in the Institute are tested. The samples differ by early ripeness and anthracnose tolerance. The average experimental variety grain yield was 2.38 t/ha. The vars. Uzkolistny 53-02, USN 53-236, Bryanskiy kormovoy and SBS 56-15 have the highest yield and adaptivity (103-113 %). The index of year conditions was revealed; 2017 with the index 0.56 was the most favorable for implementation of grain productivity of the tested narrow-leafed lupin varieties. In the ecological varieties testing the soil-and-climatic conditions of Shatilovskaya experimental station (Orel region) were the most favorable for implementation of variety grain productivity (4.0-4.5 t/ha). Grain yield was 3.0-4.0 t/ha in ecological locations which differ in soil-and-climatic conditions: there are Kaliningrad region, Mordovia Republic, Krasnoyarsk region etc.


Author(s):  
М.Н.Сертек,Ш.Ш. Бекенова,А.П.Науанова, З.Ш Сулейменова

According to the results of research on the phytosanitary status of rapeseed on ordinary Chernozem of the forest-steppe zone of the Akmola region, the species composition of pests was determined. Danadim power, Zolone 35% KE, Decis Expert were used against pests of this rapeseed. Indicators of biological effectiveness in the use of insecticides against pests ranged from 78-95%.The article discusses the biological and economic effectiveness of insecticides used against the main pests of rapeseed. Treatment of cruciferous rape beetle, rapeseed sawfly and cruciferous bug with Decis Expert insecticide (0.075 l/ha) showed high efficiency during the growing season. The use of plant protection products against a complex of harmful organisms showed that, depending on the prevailing climatic conditions, the yield increased to 1.3 c/ha, and the maximum - to 1.9 c/ha. Thus, according to the biological effectiveness of insecticides used against pests, the productDecis Expert showed high results in all pests. On the Cruciferous rape beetle it was 85.7%, in the turnip sawfly – 93.5%, in the cruciferous bug – 81.9%.


Author(s):  
Luca Novelli ◽  
Michele Vianello ◽  
Hong Weimin ◽  
Lucia Bonadonna ◽  
Tiziana Forte

The kinematic approach to water monitoring of rivers and lakes was by Archimedes Logica under the EU initiatives (LIFE1996) for the monitoring of the Lagoon of Venice. These systems were limited to the measurement of typical basic parameters: pH, Eh, salinity, turbidity, dissolved oxygen, electrical conductivity, temperature and immersion depth. However, this earlier system was unable to help against pollution from hydrocarbons. In this paper, the authors present a new kinematic monitoring system named AQUARIUS, which integrates a new generation of automatic chemical and biological analyzers. Automatic sampling and measurement equipment for micro-organism discrimination and counting are present, especially for detecting dangerous species like toxic algae. This article describes the wide spectrum of applications of the new AQUARIUS system: safety control of freshwater reservoirs, detection of urban and agriculture impacts on inland waters and early warning detection of man-made accidents, which are aided by the adoption of new mobile measurement equipment and broadband data channels offered by the modern 3G network.


Author(s):  
A. V. Soudarev ◽  
B. V. Soudarev ◽  
V. B. Soudarev ◽  
A. A. Kondratiev ◽  
P. Avran

To produce a new generation of gas-pumping units and to upgrade the existing ones, the producer needs to update their heat exchange equipment. The aim of the update is to decrease its mass and sizes and to reduce its manufacturing and assembly costs. Heat-hydraulic calculations and experiments with models of the gas-turbine plant cassette-tube airheaters demonstrated that application of profiled U-tubes of a small hydraulic diameter to manufacture the matrices of such heat exchangers provides a high compactness and low metal consumption rate typical for plate heat exchangers. Simplicaty, reliability, elasticity and maintainability which are typical characteristics of tube heat exchangers are retaned.


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