Autumn Conditions Research Articles

Optimizing the number of anti-skid device for vehicle

We can image the shift work of the vehicle in the form of: a) the movement of the unit from the park to the object of work; b) work on the object; c) the movement from the object to the park. Depending on the condition of the roads, as well as the weather conditions of spring and autumn, the driving wheels of the vehicle can be equipped with the hooks just before leaving, on the road or directly at the work site. In any case, it is necessary to spend a certain amount of the shift time for installation and disassembly of the anti-skid device.

Variation in butterfly diapause duration in relation to voltinism suggests adaptation to autumn warmth, not winter cold

Abstract The life cycles of animals vary in relation to local climate, as a result of both direct environmental effects and population‐level variation in plastic responses. Insects often respond to the approach of winter by entering diapause, a hormonally programmed resting state where development is suspended and metabolism suppressed. Populations often differ in the duration of diapause, but the adaptive reasons for this are unclear. We performed a common‐garden overwintering experiment with respirometric measurements in order to investigate the progression of diapause in the butterfly Pararge aegeria. Both the duration of diapause and the depth of metabolic suppression were shown to vary between populations. In contrast to previous results from various insects, diapause duration did not correspond to the local length of winter. Instead, the observed pattern was consistent with a scenario in which diapause duration is primarily a product of selection for suppressed metabolism during warm autumn conditions. The relationship between optimal diapause duration and the length of the warm season is complicated by variation in the number of yearly generations (voltinism). These results shed new light on variation in diapause ecophysiology, and highlight voltinism as an integrated product of selection at multiple points in the seasonal cycle. A free Plain Language Summary can be found within the Supporting Information of this article.

Modeling Winter Hardiness Formation in Winter Wheat Plants

A dynamic model, which describes the growth processes, plant development and the passing of the two phases of the autumn hardening under the influence of agrometeorological conditions in autumn, was developed. The model illustrates effects of intensity of Photosynthetically Active Radiation (PAR), sunlight levels, air temperature and soil moisture on the increment of reserves of photosynthesis products and soluble carbohydrates in winter wheat plants. The results of numerical experiments showed a significant influence of intensity of sunlight levels and air temperature on the passing of two phases of hardening during autumnal period of vegetation of winter wheat plants.

Effect of Bacillus subtilis and Bacillus amyloliquefaciens culture on the growth and yield of off-season potato (Solanum tuberosum L.)

A study was carried out in order to investigate the effect of microbial fertilizer application on off-season potato (Solanum tuberosum L. cv. Universia) under field conditions in early spring and late autumn in 2016. The experiment included Control (C, no application), Standard Fertilizer Application (SFA), Microbial Fertilizer Application (MFA) and SFA+MFA treatments. An equal mixture of three strains of Bacillus subtilis VKPM B-10641(DSM 24613), Bacillus amyloliquefaciens VKPM B-10642 (DSM 24614) and Bacillus amyloliquefaciens В-10643 (DSM 24615) was applied at 1x109 cfu/ml to tubers before planting and to plants at flowering stage in MFA and SFA+MFA plots. Treatments affected the plant growth parameters. SFA plots produced the highest tuber yields in both seasons. MFA plots had earlier emergence time (40 days), higher number of stems per plant (3), higher number of leaves per plant (37.2), thicker stem diameter (10.15 mm), higher above ground biomass yields (5.42 t/ha), higher single tuber weight (104.21 g) and higher tuber yields (22.06 t/ha) compared with control plots (42 days, 2.2, 31.2, 9.15 mm, 4.40 t/ha, 90.88 g and 20.14 t/ha respectively). Tuber yield in MFA plots (26.56 t/ha) was equal to SFA plots (26.81 t/ha) in warmer autumn planting. Combination of SFA and MFA produced lower tuber yields (21.72 t/ha) than SFA treatment (26.81 t/ha). In conclusion, Bacillus subtilis and Bacillus amyloliquefaciens gave comparable tuber yields to chemical fertilizer application in warmer autumn plantings, but lower tuber yields in colder spring conditions warranting further experiments with cold tolerant psychrophilic bacterial strains for off-season potato production.

The adaptability of winter wheat varieties in the conditions of dry autumn of the Eastern Forest-Steppe of Ukraine

The results of research during 2015-2018 on the adaptability of modern winter wheat varieties depending on the main fertilizer system in the Eastern Forest-Steppe of Ukraine are given. It was established that the variety “Epoch Odessa” was the most plastic in terms of yield fluctuations (0.77-1.01 t / ha) and coefficient of variation (V = 7.0–7.1%), and also had the highest values of homeostaticity (Hom =7.71–10.31) and agronomic stability (As=92.9–93.0%). Keywords: winter wheat, variety, fertilizer system, yield, adaptability, agronomic stability.

Autumn-based vegetation indices for estimating nitrate leaching during autumn and winter in arable cropping systems

Nitrate leaching losses from arable cropping systems cause severe damage to environmental services worldwide. There is a considerable need for methods that allow rapid, easy and area covering detection of nitrate leaching to guide nitrogen (N) management. We used three years of data from the 5th cycle of a long-term crop rotation experiment in Denmark to quantify the relationships between nitrate leaching in autumn and winter and field conditions in autumn as defined by three vegetation indices [VIs; Ratio Vegetation Index (RVI), Normalized Difference Vegetation Index (NDVI), Ratio Red Edge (RRE)] in autumn. Following cereal crops, cover crops significantly reduced nitrate leaching in autumn and winter, whereas this was only the case for one out of the three years after faba bean. In autumn and winter, a negative relationship was found between nitrate leaching and cover crop aboveground biomass or aboveground N, and the thresholds were ∼2 Mg ha−1 for aboveground cover crop biomass and 60 kg N ha−1 for aboveground cover crop N, above which nitrate leaching was low and stable. A significant positive linear relationship was found between nitrate leaching and soil water nitrate concentration in autumn and winter with a slope of 4.0 kg N ha−1 per mg L−1 of nitrate-N in the soil. Although all three VIs showed significant negative relationships with nitrate leaching during autumn and winter, the sensitivities of RVI and NDVI to estimated nitrate leaching were lost sharply when nitrate leaching exceeded 100 kg N ha−1 and 50 kg N ha−1, while RRE exhibited consistent low noise equivalent values for the nitrate leaching in autumn and winter. These results provide evidence for the scope of assessing risk of nitrate leaching from agricultural soils based on newly launched satellite remote sensing platforms with NDVI and red edge bands. To maximize the application of these technologies it will be necessary to combine remote sensing with information on cropping systems and biophysical conditions.

Boosting algal lipids: Diurnal shifts in temperature exceed the effects of nitrogen limitation

Algal lipids have been observed to increase during autumn conditions (low light, low mean temperature, and diurnal shift in temperature), in large‐scale outdoor photobioreactors. In this paper, we tested the effect of diurnal shifts in temperature (DS) and nitrogen (N) limitation on algal BODIPY lipid fluorescence cell−1 (BPF). We show that DS increased BPF in algal biomass up to 28% more compared with N limitation, the standard stressor to boost neutral lipids (NL) in commercial production. Biomass yield was constant, regardless the DS range (6°C‐12°C). A combination of both stressors had an additive effect on algal BPF. A polyculture from an outdoor photobioreactor was cultivated under controlled conditions at different regimes of light, temperature, and N limitation. DSs were mimicking autumn conditions with a difference of 6°C, 10°C, and 12°C between day and night. Biomass and BPF were monitored over one to two weeks, and NLs were stained with a fluorescent marker (BODIPY) and detected with flow cytometry. Results indicate that, during autumn conditions, daily heating and cooling processes in contrast to N limitation do not challenge the trade‐off between biomass production and BPF. During seasons when day temperature is still relatively high, DSs are rapid BPF boosting stressors, while N limitation could be applied to boost BPF further during other seasons.

Ural Blocking Driving Extreme Arctic Sea Ice Loss, Cold Eurasia, and Stratospheric Vortex Weakening in Autumn and Early Winter 2016–2017

AbstractThis study investigates the dynamics that led to the repeated cold surges over midlatitude Eurasia, exceptionally warm conditions and sea ice loss over the Arctic, and the unseasonable weakening of the stratospheric polar vortex in autumn and early winter 2016–2017. We use ERA‐Interim reanalysis data and COBE sea ice and sea surface temperature observational data to trace the dynamical pathways that caused these extreme phenomena. Following abnormally low sea ice conditions in early autumn over the Pacific sector of the Arctic basin, blocking anticyclones became dominant over Eurasia throughout autumn. Ural blocking (UB) activity was four times above climatological levels and organized in several successive events. UB episodes played a key role in the unprecedented sea ice loss observed in late autumn 2016 over the Barents‐Kara Seas and the weakening of the stratospheric vortex. Each blocking induced circulation anomalies that resulted in cold air advection to its south and warm advection to its north. The near‐surface warming anomalies over the Arctic and cooling anomalies over midlatitude Eurasia varied in phase with the life cycles of UB episodes. The sea ice cover minimum over the Barents‐Kara Seas in 2016 was not observed in late summer but rather in mid‐November and December shortly after the two strongest UB episodes. Each UB episode drove intense upward flux of wave activity that resulted in unseasonable weakening of the stratospheric vortex in November. The surface impact of this weakening can be linked to the migration of blocking activity and cold spells toward Europe in early winter 2017.

To cross or not to cross \u2013 thrushes at the German North Sea coast adapt flight and routing to wind conditions in autumn

BackgroundAlthough many aspects of passerine migration are genetically determined, routing appears to be flexibly adjusted to the conditions experienced on each individual journey. This holds especially true for routing decisions taken when confronted with large bodies of water. Once taken, these decisions can be hardly altered or revised. In this paper, we analysed stopover and routing decisions taken by three species of thrushes, blackbirds, redwings and song thrushes, at the German North Sea coast.MethodsBirds were equipped with radio-telemetry tags at stopover sites along the coast during autumn migration and subsequently tracked by an automated receiver network covering the coastline and islands of the German Bight.ResultsThe thrushes resumed migration in nights with a favourable northward wind component and clear skies. About 40% of the tagged individuals have taken an offshore instead of an alongshore oriented flight route. Routing decisions were influenced by the strength of the eastward wind component with offshore oriented flights taking place primarily under weak winds or winds blowing towards the west. Thrushes that took an offshore oriented route stopped over at the coast longer than those flying alongshore. Interestingly, offshore as well as alongshore oriented flights co-occurred within single nights and under comparable weather conditions.ConclusionsMigratory flight and routing decisions of thrushes at the German North Sea coast are highly dependent on weather, in particular wind. Still, we found evidence that weather may not be the sole reason for individual routes taken. Physical condition, morphology or animal personality lend themselves as possible additional factors of influence. Enabling a more detailed understanding of thrush migration over and along the German North Sea, our data help to better judge risks that migratory birds are facing when en route conditions are altered, for example by artificial obstacles such as offshore wind turbines.

Climatic Drivers of Greening Trends in the Alps

Since the 1980s, vegetated lands have experienced widespread greening at the global scale. Numerous studies have focused on spatial patterns and mechanisms of this phenomenon, especially in the Arctic and sub-Arctic regions. Greening trends in the European Alps have received less attention, although this region has experienced strong climate and land-use changes during recent decades. We studied the rates and spatial patterns of greening in an inner-alpine region of the Western Alps. We used MODIS-derived normalized difference vegetation index (NDVI) at 8-day temporal and 250 m spatial resolution, for the period 2000–2018, and removed areas with disturbances in order to consider the trends of undisturbed vegetation. The objectives of this study were to (i) quantify trends of greening in a representative area of the Western Alps; and (ii) examine mechanisms and causes of spatial patterns of greening across different plant types. We show that 63% of vegetated areas experienced significant trends during the 2000–2018 period, of which only 8% were negative. We identify (i) a climatic control on spring and autumn phenology with contrasting effects depending on plant type and elevation, and (ii) land-use change dynamics, such as shrub encroachment on abandoned pastures and colonization of new surfaces at high elevation. Below 1500 m, warming temperatures promote incremental greening in the transition from spring to summer, but not in fall, suggesting either photoperiod or water limitation. In the alpine and sub-alpine belts (>1800 m asl), snow prevents vegetation development until late spring, despite favorable temperatures. Instead, at high elevation greening acts both in summer and autumn. However, photoperiod limitation likely prevents forested ecosystems from fully exploiting warmer autumn conditions. We furthermore illustrate two emblematic cases of prominent greening: recent colonization of previously glaciated/non vegetated areas, as well as shrub/tree encroachment due to the abandonment of agricultural practices. Our results demonstrate the interplay of climate and land-use change in controlling greening dynamics in the Western Alps.

Correlates of seasonal change in the body condition of an Arctic top predator.

Climate-driven sea ice loss has led to changes in the timing of key biological events in the Arctic, however, the consequences and rate of these changes remain largely unknown. Polar bears (Ursus maritimus) undergo seasonal changes in energy stores in relation to foraging opportunities and habitat conditions. Declining sea ice has been linked to reduced body condition in some subpopulations, however, the specific timing and duration of the feeding period when bears acquire most of their energy stores and its relationship to the timing of ice break-up is poorly understood. We used community-based sampling to investigate seasonality in body condition (energy stores) of polar bears in Nunavut, Canada, and examined the influence of sea ice variables. We used adipose tissue lipid content as an index of body condition for 1,206 polar bears harvested from 2010-2017 across five subpopulations with varying seasonal ice conditions: Baffin Bay (October-August), Davis Strait and Foxe Basin (year-round), Gulf of Boothia and Lancaster Sound (August-May). Similar seasonal patterns were found in body condition across subpopulations with bears at their nadir of condition in the spring, followed by fat accumulation past break-up date and subsequent peak body condition in autumn, indicating that bears are actively foraging in late spring and early summer. Late season feeding implies that even minor advances in the timing of break-up may have detrimental effects on foraging opportunities, body condition, and subsequent reproduction and survival. The magnitude of seasonal changes in body condition varied across the study area, presumably driven by local environmental conditions. Our results demonstrate how community-based monitoring of polar bears can reveal population-level responses to climate warming in advance of detectable demographic change. Our data on the seasonal timing of polar bear foraging and energy storage should inform predictive models of the effects of climate-mediated sea ice loss.

Modeling of Winter Hardiness Formation in Winter Wheat Plants

A dynamic model of the formation of winter hardiness of winter wheat plants during the autumn period of vegetation, which describes the growth processes, plant development and the passing of the two phases of the autumnal hardening under the effect of agrometeo-rological conditions in autumn, was developed. Effects of intensity of photosynthetically active radiation (PAR), sunlight levels, air temperature and soil moisture on the increment of reserves of photosynthesis products and soluble carbohydrates in winter wheat plants are described. The results of numerical experiments showed a significant influence of intensity of sunlight levels and air temperature on the passing of two phases of hardening during autumnal period of vegetation of winter wheat plants.

The climatic drivers of primary Picea forest growth along the Carpathian arc are changing under rising temperatures.

Climatic constraints on tree growth mediate an important link between terrestrial and atmospheric carbon pools. Tree rings provide valuable information on climate-driven growth patterns, but existing data tend to be biased toward older trees on climatically extreme sites. Understanding climate change responses of biogeographic regions requires data that integrate spatial variability in growing conditions and forest structure. We analyzed both temporal (c. 1901-2010) and spatial variation in radial growth patterns in 9,876 trees from fragments of primary Picea abies forests spanning the latitudinal and altitudinal extent of the Carpathian arc. Growth was positively correlated with summer temperatures and spring moisture availability throughout the entire region. However, important seasonal variation in climate responses occurred along geospatial gradients. At northern sites, winter precipitation and October temperatures of the year preceding ring formation were positively correlated with ring width. In contrast, trees at the southern extent of the Carpathians responded negatively to warm and dry conditions in autumn of the year preceding ring formation. An assessment of regional synchronization in radial growth variability showed temporal fluctuations throughout the 20th century linked to the onset of moisture limitation in southern landscapes. Since the beginning of the study period, differences between high and low elevations in the temperature sensitivity of tree growth generally declined, while moisture sensitivity increased at lower elevations. Growth trend analyses demonstrated changes in absolute tree growth rates linked to climatic change, with basal area increments in northern landscapes and lower altitudes responding positively to recent warming. Tree growth has predominantly increased with rising temperatures in the Carpathians, accompanied by early indicators that portions of the mountain range are transitioning from temperature to moisture limitation. Continued warming will alleviate large-scale temperature constraints on tree growth, giving increasing weight to local drivers that are more challenging to predict.

Autumn condition of rangeland vegetation in the foothills of the Chu-Ili mountains

Currently, human settlements, farms and areas with water points are hotspots of land degradation.One of the main causes of land degradation is overgrazing. The overgrazing of rangelands around villages is a problem, together with the drastic depletion of natural rangelands around densely populatedareas, especially in the South-Eastern part of the country. Traditional methods of mapping of soils andvegetation by expert-extrapolation method require considerable financial and time costs. At the moderntechnical level, the problem of obtaining information on the state of the land depends on the availability of remote sensing methods, which make it possible to quickly obtain a fairly complete amount of data onthe state of rangeland ecosystems. It is well known that remote sensing methods should be accompaniedby extensive corrective research.A new approach for assessing the state of rangeland resources was evaluated, which consists inchoosing “hot spots” by applying GIS data and conducting field research in selected basic plots for creation digital cartographic materials.The article presents the results of field geobotanical studies conducted in the foothill areas of theChu-Ili Mountains, in the zone of piedmont deserts. The state of rangeland vegetation and biologicalindicators of degradation were studied. The spectral characteristics of vegetation of the study area arerevealed. By the analysis of field data and the use of remote sensing methods, the state of rangelandswas assessed.Key words: rangeland, foothills, vegetation, biological indicators, degradation, spectral characteristics, community, ephemerals.

Do longer growing seasons give introduced plants an advantage over native plants in Interior Alaska?

In interior Alaska, increases in growing season length and rapid expansion of introduced species are altering the environment for native plants. We evaluated whether earlier springs, warmer summers, and extended autumns alter the phenology of leaves and flowers in native and introduced forbs and shrubs in the boreal understory and open-canopy habitats, and whether the responses provide an advantage to either group. We tracked the phenology of 29 native and 12 introduced species over three years with very different spring, summer, and autumn conditions. The native species produced flowers (but not leaves) earlier than the introduced species, and both groups advanced leaf-out and flowering in the early-snowmelt year. However, shifts in phenology between early and late years were similar for both groups. There was no increase in fruit development rate for either group in the warm summer. In contrast, in the year with the extended autumn, the introduced plants extended leaf production and time of senescence much more than native species. While growth form and leaf habit could explain the differences in phenology between native and introduced groups in spring and summer, these traits could not account for differences in autumn. We conclude that in boreal Alaska extended autumns may benefit introduced species more than native ones.

Season of fire influences seed dispersal by wind in a serotinous obligate seeding tree

In temperate ecosystems, fire management involving prescribed burning and wildfire suppression often causes a shift in fire season from hot and dry summer conditions to cooler, moister conditions in spring or autumn. The effects of this change on seed dispersal by wind after fire are unknown. However, calmer wind conditions and increased standing vegetation after fires in cooler seasons may reduce seed dispersal following fire. We studied seed dispersal in different seasons for a serotinous obligate-seeder, Callitris verrucosa, growing in a semi-arid environment in South Australia. We measured primary (wind-borne) and secondary (on-ground) seed dispersal during spring, summer and autumn, using empirical observations and modelling based on detailed measurement of wind characteristics. At comparable horizontal wind speeds, primary dispersal was greater in summer compared to spring and autumn. Secondary dispersal was similarly short in all three seasons when vegetation cover was high, but when cover was low, seeds travelled much further in summer than in the other two seasons. A shift in the seasonal timing of seed release can decrease dispersal distances of serotinous obligate seeders, which is likely to reduce gene flow and the ability to colonise new sites. This can lead to changes in population and community structures which may further affect fire patterns. These findings could be applicable to other serotinous obligate seeding plant species found in other families such as Proteaceae, Myrtaceae, Pinaceae and Cupressaceae.

ОСОБЕННОСТИ ИСПОЛЬЗОВАНИЯ ГЕОТЕРМАЛЬНОЙ ЭНЕРГИИ С ПРИМЕНЕНИЕМ ТЕПЛОНАСОСНЫХ УСТАНОВОК В УСЛОВИЯХ НИЗКИХ ТЕМПЕРАТУР ВОЗДУХА

Актуальность. Использование низкопотенциальной энергии водоемов с помощью теплонасосных установок в условиях низких температур окружающей среды – воздуха (период времени «осень–зима–весна»), характерных для большей части территории России, связано с возможным обмерзанием трубок испарителя теплонасосных установок, что приводит к изменению режима его работы. Анализ основных закономерностей процессов работы теплообменного оборудования, а также оценка энергоэффективности теплонасосных установок в условиях образования слоя льда на рабочих поверхностях испарителя до настоящего времени не проводились. Цель: экспериментальное изучение основных закономерностей процессов образования льда на рабочих поверхностях трубок испарителя теплонасосных установок, погруженных в воду с температурой, соответствующей условиям осеннего, зимнего и весеннего периодов года для большинства природных водоемов, расположенных в РФ, а также анализ основных характеристик работы ТНУ в таких условиях. Объект: парокомпрессионный тепловой насос, работающий в условиях образования слоя льда на рабочих поверхностях трубок испарителя, помещённых в резервуар с водой, температура которой ниже 280 К. Методы. Значения температур в характерных точках поверхности трубки теплообменника-испарителя и воды, находящейся в этой области, измерялись 15 хромель-алюмелевыми термопреобразователями (ХА термопары), подключенными через АЦП к компьютеру, и регистрировались в реальном времени. На основании полученных данных проводился расчет коэффициента преобразования теплонасосной установки по известной методике. Результаты. Выделен эффект образования льда, толщиной до 10 мм, на поверхности трубок испарителя при температурах воды ниже 280 К и времени работы установки до 8000 сек. Установлено, что этот слой существенно снижает интенсивность передачи теплоты в зону испарения хладагента. Эффективность работы теплонасосной установки при этом снижается до минимума. По результатам выполненных экспериментов сделан вывод о возможности работы теплонасосных установок при частичном покрытии трубки испарителя льдом. Сформулирована гипотеза о механизме процессов теплопереноса и фазовых превращений, протекающих вблизи трубок теплоносителя теплонасосной установки, при температурах воды менее 286 К. Результаты выполненных исследований являются базой для обоснования условий эффективного применения теплонасосных установок в регионах с низкими температурами воздуха в период осени, зимы и весны.

Impact of crop genetic diversity on a litter consumer

Belowground communities, and especially earthworms, provide numerous services in agroecosystems. In the current context of crop genetic erosion, this study aims at assessing the effect of wheat cultivar diversity on earthworm growth and survival. Our laboratory experiment was divided into two periods: (1) the “feeding period” (4 months), simulating conditions in autumn with cool temperatures and high food availability, and (2) the “non-feeding period” (1 month) simulating conditions in winter with cold temperatures and low food availability because litter had already been consumed without replacement. The aerial biomass of mixtures of wheat cultivars was used as food for earthworms and their growth was measured twice during the feeding period and once during the non-feeding period. We found two major effects on earthworm growth. Increasing the cultivar number (i) increased juvenile earthworm growth and earthworm survival and (ii) decreased adult earthworm growth. A consistent positive effect of nitrogen concentration of the biomass was found on growth and this effect was independent of biodiversity effects. This study suggests that the loss of litter intraspecific genetic diversity has an impact on earthworm populations, probably through mechanisms linked to the variance in edibility or the balanced diet hypotheses. While they remain to be tested in the field, these results suggest that the current losses of crop genetic diversity could potentially impact processes at the community or ecosystem level through a decrease in food quality.

Influence of Green Spaces on Outdoors Thermal Comfort—Structured Experiment in a Mediterranean Climate

As a growing part of the global population lives in cities, green spaces are an essential asset for improving quality of life. This study aims to address the role of green spaces in providing favorable thermal comfort conditions for the use of outdoor spaces. The research methodology consisted of a structured experiment where a defined set of individuals from different age groups was exposed to differentiated microclimate conditions. Four nearby locations were considered, ranging from a stone-paved surface without shade to high tree canopy coverage over grass. This experiment took place in three different days in summer and early autumn conditions, with a total of 432 questionnaires. Results show a wide range of thermal sensations found during this experiment, while more favorable thermal sensations were found in shaded locations. To investigate the role of prevailing meteorological and personal conditions on thermal sensations, multinomial logistic regression analysis was applied. Results show the influence of air temperature, global radiation, wind speed, and interviewees’ gender. As meteorological variables were influenced by the diverse contexts found within a close distance inside the studied green space, results from this structured experiment suggest the need for micrometeorological diversity in the local context as a means to promote greater adaptive opportunities for green spaces users.

The influence of weather conditions during an autumn period on the development of basic wreckers and diseases of agrocenosis of winter wheat in Forest-Steppe zone

Goal. To investigate the influence of weather conditions, to specify the terms of sowing in an autumn period and their influence on the phytosanitary condition of winter wheat’s agrocenosis in the Forest-steppe zone. In conditions of climate change, specify the quantitative composition of the entomological and on phytopathogenic complexes in winter wheat chrops and the peculiarities of their manifestation.
 Methods. Field research, laboratory research, and analytical research. The field researches have been conducted in the conditions of monitoring inspections. The results of the experimental data are counted and collected using modern standard computer programs (Word, Excel).
 Results. Influence of weather conditions was investigated in the autumn period (air temperature, amount of precipitation) for 2006—2016 and the long-term seasonal dynamics of the number of basic wreckers on winter wheat sowing and detected features during climate change. Many years of weather conditions during winter wheat sowing have been analyzed.
 Conclusions. Global warming and drought caused by it in the autumn period prolonged the term of the autumn vegetation of winter wheat. Through droughty conditions, or over wetting optimal terms of sowing were displaced for later. It was researched that optimal terms of winter wheat sowing are considered in the zone of the North Forest-steppe from 15—25 September, which is allowed until 30 September. The increase in air temperature and a sufficient amount of precipitation in the autumn period leads to dissemination of sowing the most widespread wreckers and affection of plants by diseases. With the approach of ETL, there may be a need for protective measures in the conditions of early sowing and prolonged warm autumn, especially after colony precursors. Autumn spraying crops with fungicidal agents prevents plant infections by pathogens in the early phases of plant development.