The sum of effective temperatures and work on the apiary in Udmurt Republic

Biomics ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 143-146
Author(s):  
L.M. Kolbina ◽  
A.S. Osokina
Keyword(s):  
Sum Of Effective Temperatures ◽  
Udmurt Republic ◽  
Effective Temperatures

scholarly journals Sum of Effective Temperatures in Colorado Beetle Control

2015 ◽  
Vol 7 ◽  
pp. 6-11
Author(s):  
Andrzej Bandyk ◽  
Anna Tratwal ◽  
Magdalena Jakubowska ◽  
Andrzej Podleśny
Keyword(s):  
Colorado Beetle ◽  
Sum Of Effective Temperatures ◽  
Effective Temperatures

scholarly journals ECOLOGICAL-GEOGRAPHIC APPROACHES TO THE STUDY OF GENETIC DIVERSITY OF BARLEY AND OAT FROM THE VIR COLLECTION

2020 ◽  
Author(s):  
Igor Loskutov ◽  
Lubov Novikova ◽  
Olga Kovaleva ◽  
Nadezhda Ivanova ◽  
Elena Blinova ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
Growing Season ◽  
Regression Coefficients ◽  
Cultivation Conditions ◽  
High Productivity ◽  
Sum Of Effective Temperatures ◽  
Economically Valuable Traits ◽  
Effective Temperatures ◽  
The Stability ◽  
Selection Of

Under conditions of climate change, the assessment of the stability of genotypes is of particular importance. To conduct directed selection of genotypes with a narrow or broad reaction rate, it is necessary to assess their stability already in the early stages of breeding. The aim of the study was to study the stability of breeding significant traits of oat and barley samples in contrasting ecological and geographical conditions. 25 oat samples and 25 barley samples were studied over 3 years under contrasting conditions in St. Petersburg and the Tambov region. Varieties are characterized by average values of economically valuable traits and genotype regression coefficients on the influence of the bi environment according to Eberhart and Russell. The most sensitive to a change in the ecological and geographical situation were the durations of the germination-heading, germination-harvest periods and grain yield. These characters varied to a greater extent depending on the cultivation conditions than on the genotype. According to regression coefficients for environmental conditions, significant differences in genotypes were only in yield. Contrasting groups of varieties were distinguished by regression coefficients on environmental conditions, genotypes with high productivity. The durations of germination-heading, germination-harvest, the plant height reacted to the change in the environment the same in different varieties. The duration of the growing season was determined by the sum of effective temperatures above 15C. The reduction of the growing season in both crops was 3 days with an increase in the sum of effective temperatures above 15C by 100C.

scholarly journals Prediction of adult western corn rootworm (Diabrotica virgifera virgifera LeConte) emergence

2013 ◽  
Vol 49 (No. 2) ◽  
pp. 89-97
Author(s):  
T. Středa ◽  
O. Vahala ◽  
H. Středová
Keyword(s):  
Diabrotica Virgifera Virgifera ◽  
Western Corn Rootworm ◽  
Threshold Temperature ◽  
Corn Rootworm ◽  
Diabrotica Virgifera ◽  
Degree Days ◽  
The Czech Republic ◽  
Sum Of Effective Temperatures ◽  
Effective Temperatures ◽  
Diabrotica Virgifera Virgifera Leconte

The sum of effective temperatures (SET) of adult western corn rootworm (WCR) occurrence was determined based on several criteria. The risk of WCR occurrence was mapped, and the areas of continuous reproduction of WCR in the Czech Republic were identified. The daily soil SET was observed until the initial adult WCR occurrence, and it ranged from 414 degree days (DD) when the lower threshold temperature (LTT) was 12.5°C at 0.02 m depth to 719 DD (LTT of 10°C at a depth of 0.05 m). The daily air SET ranged from 415 DD (LTT 12.5°C at a height of 2 m) to 726 DD (LTT of 10°C at a height of 0.05 m).  

Seasonal trends in the rate of population increase of Frankliniella occidentalis (Thysanoptera: Thripidae) on cucumber

1997 ◽  
Vol 87 (5) ◽  
pp. 487-495 ◽  
Author(s):  
V. Jarošík ◽  
M. Koliáš ◽  
L. Lapchin ◽  
J. Rochat ◽  
A.F.G. Dixon
Keyword(s):  
Population Growth ◽  
Frankliniella Occidentalis ◽  
First Generation ◽  
Developmental Rate ◽  
Exponential Phase ◽  
Population Increase ◽  
Developmental Threshold ◽  
Sum Of Effective Temperatures ◽  
Lower Developmental Threshold ◽  
Effective Temperatures

AbstractThe developmental rate of Frankliniella occidentalis (Pergande) was determined on cucumber Cucumis sativus cv. Sandra over a range of constant temperatures. The lower developmental threshold (LDT) and the sum of effective temperatures (SET) for the pre-imaginal development were 10.7°C and 231.1°C, respectively. The rate of population increase was assessed as the sum of effective temperatures above the lower developmental threshold by monitoring the numbers of thrips on individual leaves of cucumber under commercial greenhouse conditions. Population growth was characterized by an early stochastic phase, corresponding to pre-imaginal development of the first generation, and followed by an exponential phase starting with the second generation, the rate of which did not vary between plants. Throughout the exponential phase, the rate of population growth increased with time/age of plant. As significant damage to cucumber may occur during the exponential phase of population increase, the sum of effective temperatures of 231°C can be used to predict when damage is likely to start to occur.

scholarly journals Harmful occurrence of Rosy rustic moth (Hydraecia micacea) (Noctuidae: Lepidoptera) on hop in the Czech Republic

2010 ◽  
Vol 41 (No. 4) ◽  
pp. 150-157 ◽  
Author(s):  
J. Šedivý ◽  
P. Born ◽  
J. Vostřel
Keyword(s):  
Czech Republic ◽  
Light Trap ◽  
Pheromone Traps ◽  
The Czech Republic ◽  
Elytrigia Repens ◽  
Sum Of Effective Temperatures ◽  
Long Time ◽  
Effective Temperatures

The Rosy rustic moth (<I>Hydraecia micacea</I>) has been a pest of hop in Czech hop regions for a long time. It causes most severe damages in hop gardens infested by quackgrass (<I>Elytrigia repens</I>) on waterlogged<B> </B>areas. Larvae emerge from the second half of April to the middle of May. The sum of effective temperatures (SET) necessary for hatching larvae has been determined to be 78.6C over a 4-year average. Young larvae first feed on leaves of quackgrass, and later move to hop plants where they feed inside the shoots and rootstocks. Occurrence and damage are<B> </B>most frequent at the edges of hop gardens and in places with anchorages between two hop gardens. The ichneumonid wasp <I>Ichneumon sarcitorius</I> and the fly <I>Lidella thompsoni</I> are the most common parasitoids of this pest. Numbers of males caught in pheromone traps were very low. More males were trapped near hop gardens typical for repeated harmful occurrence of the rosy rustic moth. Females trapped in a light trap from the second half of August to the last decade of September had already full-developed eggs in their ovaries.

scholarly journals Ecological and coenotic characteristic of Cyclachaena xanthiifolia (Nutt.) Fresen. in the flora of Ukraine

2019 ◽  
Vol 9 (3) ◽  
pp. 255-258
Author(s):  
O. N. Kurdyukova
Keyword(s):  
The Black Sea ◽  
Human Control ◽  
Adventitious Species ◽  
Dry Steppe ◽  
Black Sea Coast ◽  
Temperature Requirements ◽  
Sum Of Effective Temperatures ◽  
Western Ukraine ◽  
Effective Temperatures ◽  
Bog Soils

The flora of Ukraine includes Cyclachaena xanthiifolia adventitious species, which is dangerous for humans and animals. It got out of human control and spread widely throughout the whole territory, but its environmental features have not been studied enough. We found that Cyclachaena xanthiifolia is the eurytopic species in Ukraine, that is, it has wide ecological amplitude. It grows well and develops in wide weather and climatic divides: from semi-ombrophytic climate (1000 mm, Pre-Carpathian, Transcarpathia) to arid one (less than 350 mm, Prysyvashshia) in terms of climate humidity; from hemioceanic climate (Western Ukraine and the Black Sea coast) to subcontinental one (Dry-steppe and South-steppe zones) in terms of climate continentality. Its habitats are confined to flat, lowered, but well-drained and low areas. We did not find it at the altitudes of more than 500 m. This is heliophyte, a short-day plant. According to temperature requirements, it occupies an intermediate position between submesothermal and macrothermal plants that grow well when the amount of heat in April-October is from 1780 to 2620 kcal/cm2 and the sum of effective temperatures is from 2850 to 3750ºC. When it comes to demand on soil moisture, it is predominantly mesophytic plant; with regard to soil solution reaction, it is neutrophilic or subacidophilic plant; with respect to soil fertility, it is eutrophic humifilous eunitrophilic plant on ruderal habitats, and oligotrophic agumyl or sub-agumyl heminitrophilic plant on technogenic ones. The highest frequency of occurrence, abundance and the best morphological plants’ parameters were found on black earth, chestnut, and meadow soils, and the worst plants’ parameters were found on sod-podzol, brown forest, sand, saline and bog soils. In relation to landscapes cultivation, this plant is euhemerobe or polyhemerobe. It grows in the Ambrosio artemisiifolia-Chenopodietum albi, Ambrosio artemisiifolia-Cirsietum setosi, Amaranto retroflexi-Setarietum glaucae, Amaranthetum blitoidi-Echinochloetum grusgalli, Poligono-Chenopodietea communities and others in segetal biotopes. It grows in the Ivaetum xanthiifoliae, Atriplicetum tataricae, Chenopodietum glauco-rubri, Chenopodio-Аtriplicetum hastatae, Ambrosio artemisiifoliae-Xanthietum strumariae communities and others in ruderal biotopes.

Time Determination of Conducting Senication of Rice Crops Taking Into Account the Sum of Effective Temperatures

2018 ◽  
Vol 44 (6) ◽  
pp. 499-504
Author(s):  
A. Kh. Sheudzhen ◽  
T. N. Bondareva ◽  
P. N. Kharchenko ◽  
I. A. Doroshev ◽  
Kh. D. Khurum
Keyword(s):  
Sum Of Effective Temperatures ◽  
Time Determination ◽  
Effective Temperatures

scholarly journals Monitoring of Codling Moth (Cydia Pomonella L.) in Apple Orchards Using Two Methods

2010 ◽  
Vol 50 (2) ◽  
pp. 220-223 ◽  
Author(s):  
Izabela Kot
Keyword(s):  
First Generation ◽  
Cydia Pomonella ◽  
Codling Moth ◽  
Pheromone Traps ◽  
Apple Orchards ◽  
Different Types ◽  
Two Generations ◽  
Sum Of Effective Temperatures ◽  
The Mean ◽  
Effective Temperatures

Monitoring of Codling Moth (Cydia Pomonella L.) in Apple Orchards Using Two MethodsThe present studies were conducted in 1999-2001 in three apple orchards differing from each other by the system of cultivation, the type of agricultural treatments and chemical control of pests. Their purpose was to monitor codling moth (Cydia pomonellaL.) in different types of apple orchards using pheromone traps, finding out the relation between the occurrence of moths and the sum of effective temperatures as well as determining the number of wintering caterpillars of this species with the use of bands of corrugated paper. The analysis of male flight of codling moth on the basis of pheromone traps makes it possible to state the occurrence of two generations in each studied year. The maximum population of the first generation was observed in the second or third ten days of June, while that of the second generation in the first ten days of August. The moths flight began when the sum of effective temperatures was 109.2-145.2°C, and the mean diurnal temperature was 12.3-17.2°C.

scholarly journals APPLICATION OF THE CARTOGRAPHIC METHOD FOR ESTIMATING DIFFERENCES IN THE APPLIED CLIMATE INDICES SAT AND SET

2019 ◽  
Vol 30 (3-4) ◽  
pp. 11-27
Author(s):  
E.N. Popova ◽  
◽  
V.V. Yasjukevich ◽  
I.O. Popov ◽  
◽  
...  
Keyword(s):  
Invasive Species ◽  
Predictive Models ◽  
Climate Indices ◽  
Clear Understanding ◽  
Sum Of Effective Temperatures ◽  
Low Threshold ◽  
Effective Temperatures ◽  
Sum Of Active Temperatures

For the territory of Russia and neighboring countries, the maps with isolines limiting geographical areas where the climate indices the sum of active temperatures (SAT) and the sum of effective temperatures (SET) exceed or do not reach the indicated values from 500°С to 3500°С in increments of 500° С at a low threshold of 10°С were constructed for the period 1981-2010. Using these maps, the differences in the areas of the territories bounded by the same isolines of SAT and SET were found. The importance of the correct use of the SAT and SET indices for determining the boundaries of the ranges of various poikilothermic organisms, including many dangerous introduced and invasive species, have been shown, the need for a clear understanding of their differences to build predictive models have been substantiated.

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