scholarly journals Population dynamics of aphids (Aphididae) on orange (Citrus sinensis ‘Thomson Navel’) and mandarin (Citrus reticulata ‘Blanco’)

2016 ◽  
Vol 107 (1) ◽  
pp. 137 ◽  
Author(s):  
Salim LEBBAL ◽  
Malik LAAMARI
Keyword(s):  
Citrus Sinensis ◽  
Common Species ◽  
Aphid Species ◽  
Climatic Conditions ◽  
Citrus Reticulata ◽  
Citrus Fruits ◽  
June July August ◽  
Aphis Spiraecola ◽  
June July ◽  
Orange Trees

Citrus fruits represent one of the most important fruit productions worldwide. However, they suffer from a numerous constraints. Aphids are among the causes of the decline in the production of citrus. In this study, the diversity of citrus aphids and their seasonal occurrence were explored on orange and mandarin, during 2012 and 2013, in an orchard located in Skikda province (Algeria). In total, six different aphid species were found during two years. The most common species was <em>Aphis spiraecola </em>Patch, 1914.  Climatic conditions had an important role in the infestation level by aphids. There were changes of aphid dynamics between the two years of the investigation. No aphids was recorded in six months in 2012 (January, June, July, August, September and December) and in three months in 2013 (January, February and August).  Besides, the number of identified aphid species increased from two to five. On the other hand, the orange trees seemed to be the most infested host species.

Accumulation and Metabolism of Bromacil in Pineapple Sweet Orange (Citrus sinensis) and Cleopatra Mandarin (Citrus reticulata)

Weed Science ◽  
1981 ◽  
Vol 29 (1) ◽  
pp. 1-4 ◽  
Author(s):  
L. S. Jordan ◽  
W. A. Clerx
Keyword(s):  
Citrus Sinensis ◽  
Sweet Orange ◽  
Citrus Reticulata ◽  
Minor Metabolite ◽  
A Minor ◽  
Orange Trees ◽  
Conjugated Metabolites ◽  
Cleopatra Mandarin

Young orange [Citrus sinensis (L.) Osbeck ‘Pineapple sweet orange’] trees are more sensitive to bromacil (5-bromo-3-sec-butyl-6-methyluracil) than young mandarin (Citrus reticulata Blanco ‘Cleopatra mandarin’) trees. Pineapple sweet orange roots absorbed twice as much 14C from bromacil, and accumulated three times as much in the leaves, as did Cleopatra mandarin. The amount of conjugated metabolites formed was the same in the roots of the two cultivars, but twice as much formed in the leaves of Cleopatra mandarin as in the leaves of Pineapple sweet orange. The principle metabolite was 5-bromo-3-sec-butyl-6-hydroxymethyluracil; a minor metabolite was tentatively identified as 5-bromo-3-(3-hydroxyl-1-methylpropyl)-6-methyluracil. No 5-bromouracil was detected. Citrus cultivars differ in their ability to accumulate and metabolize bromacil into conjugated nonphytotoxic compounds.

scholarly journals CLIMATIC CONDITIONS OF THE ULYANOVSK REGION AND THEIR CHANGES

2021 ◽  
Author(s):  
Rаside B. Sharipova ◽  
Keyword(s):  
Air Temperature ◽  
Climatic Conditions ◽  
Monthly Precipitation ◽  
Clear Trend ◽  
Climate Conditions ◽  
June July August ◽  
Ulyanovsk Region ◽  
Average Monthly Precipitation ◽  
June July

The article summarizes the results of changes in climate conditions: the average annual air temperature for 1961-2018 in the Ulyanovsk region increased by 1.8°C, the most significant increase in temperature was observed in the last twenty-five-year period of time, in the winter pe-riod. There is a tendency to increase both average and seasonal values. When analyzing the time values of the dynamics of the average monthly precipitation amounts, it was found that: the min-imum amount of precipitation falls in the winter months, in June – July they are maximum. There is a clear trend of their growth in September, in the winter months: December, January, February, March. A steady decline in precipitation is observed in June, July, August, and November.

scholarly journals Elemental Profile of Kinnow (Citrus reticulata) Growing in Sargodha District

2021 ◽  
Vol 64 (1) ◽  
pp. 38-42
Author(s):  
Abdul Ghani ◽  
Muhammad Ikram ◽  
Mujahid Hussain ◽  
Muhammad Imran ◽  
Muhammad Nadeem ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Elemental Analysis ◽  
Climatic Conditions ◽  
Spatial Variations ◽  
Atomic Absorption Spectrophotometer ◽  
Citrus Reticulata ◽  
Citrus Fruits ◽  
Elemental Profile

Citrus is one of the most commonly used as a fruit in Pakistan. To estimate their elemental profile citrus were collected from five different tehsils of Sargodha district. Elemental analysis was carried out by atomic absorption spectrophotometer. There results showed that citrus fruits have riched source of minerals and have highest concentrations of Cu (2.71 mg/Kg), Mn (0.1633 mg/Kg) and Zn (31.72 mg/Kg) noted in T1 (Silanwali), while the maximum concentrations of Mg (65.247 mg/Kg), Cr (0.343 mg/Kg),  P (1.146 mg/Kg), Co (0.536 mg/Kg), K (133.01 mg/Kg) were found in T2 (Sahiwal), T4 (Kotmomin) and T5 (Bhehra), respectively. Fluctuation in elemental profile of Citrus reticulata may be attributed to spatial variations or may be due to agro-climatic conditions that varies in all tehsils.  

scholarly journals Tolerance of Selected Orange and Mandarin Hybrid Fruit to Low-dose Irradiation for Quarantine Purposes

HortScience ◽  
2000 ◽  
Vol 35 (7) ◽  
pp. 1288-1291 ◽  
Author(s):  
W.R. Miller ◽  
R.E. McDonald ◽  
J. Chaparro
Keyword(s):  
Citrus Sinensis ◽  
Low Dose ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Citrus Reticulata ◽  
Citrus Fruits ◽  
Dose Irradiation ◽  
Irradiation Treatment ◽  
Dose Tolerance ◽  
Dose Dependent

Tolerance of many citrus cultivars to low-dose irradiation treatment is not known. Ten citrus cultivars grown in Florida, including the five orange [Citrus sinensis (L.) Osbeck] cultivars, Ambersweet, Hamlin, Navel, Pineapple, and Valencia, and the five mandarin hybrids (Citrus reticulata Blanco), `Fallglo', `Minneola', `Murcott', `Sunburst', and `Temple', were exposed to irradiation at 0, 0.15, 0.3, and 0.45 kGy, and stored for 14 days at 1 °C or 5 °C plus 3 days at 20 °C, to determine dose tolerance based on fruit injury. Softening of `Valencia', `Minneola', `Murcott', and `Temple' was dose-dependent, but that of other cultivars was unaffected. Only `Ambersweet', `Valencia', `Minneola', and `Murcott' did not develop peel pitting at 0.15 kGy or higher. Total soluble solids of `Ambersweet' and `Sunburst' declined slightly with increasing dose. Titratable acidity (TA) of oranges was not affected, but TA of `Sunburst' and `Temple' juice was slightly reduced by irradiation at 0.45 kGy. Juice flavor of `Hamlin', `Navel', `Valencia', and `Minneola', and pulp flavor of `Hamlin', `Valencia', `Fallglo', `Minneola', and `Murcott' was less acceptable after irradiation at 0.3 or 0.45 kGy. The appearance of all cultivars was negatively affected by the loss of glossiness with the 0.45 kGy dose. Less than 1.0% of fruit decayed and irradiation treatment had no effect on decay. Our study indicates that growers and shippers need to be aware that the effects of irradiation on citrus fruits are highly variable and both cultivar-dependent and dose-dependent.

scholarly journals Study of Density of Raspberry Fruits in View of Mechanized Harvesting

2021 ◽  
Vol 247 ◽  
pp. 01045
Author(s):  
Natalia Bogomolova ◽  
Svetlana Rezvyakova ◽  
Maxim Lupin
Keyword(s):  
Climatic Factors ◽  
Growing Season ◽  
Climatic Conditions ◽  
Test Device ◽  
Breeding Material ◽  
June July August ◽  
Crushing Force ◽  
June July ◽  
Full Maturity

The paper discusses the possibility of combining large-fruits and density of raspberries as one of the main and decisive limiting indicators of the suitability of varieties for mechanized cultivation and further harvesting, as well as for long-term transportation to the consumer. The objects of research were 20 raspberry varieties and 15 elite forms from controlled crossings and populations from free pollination. The annual assessment of the density of raspberries was carried out at the collection and selection plots during the period of active fruiting (June-July-August) 2019-2020. From each variety sample, 10 berries were taken at full maturity. The berry crushing force was determined using the fruit test device. The climatic conditions of the study periods were rich in contrast, which indicates the instability of climatic factors of the summer growing season. This made it possible to fairly objectively evaluate the collection and breeding material in terms of the size and density of raspberries. Assessing the crushing force of collection and elite forms of raspberries made it possible to identify varieties having the increased fruit density. Rannyaya Zarya, Lyachka and Lazarevskaya have a relatively large (3.5-4.5 g) and dense berry with a crushing force of 7.6-8.4 N. The interesting elite forms are 9-58; 9-27; 9-20 with a berry mass of 3.8-4.0 g and a crushing force of 7.3-9.7-N. The crushing force of fruits of these elite forms during the study period was not lower than 5.0 N, but sometimes it was significantly influenced by soil and air moisture, which negatively affected the commercial qualities of berries.

scholarly journals Antioxidant and Anti-Cancer Effect of Ethanolic Extract of Citrus Fruits on Hep G2 and MCF-7 Cell Lines

2021 ◽  
pp. 84-90
Author(s):  
Shahid Rasool ◽  
Hammad Ahmed ◽  
Mehreen Malik Uttra ◽  
Ambreen Malik Uttra ◽  
Muhammad Rizwan Khan ◽  
...  
Keyword(s):  
Cell Growth ◽  
Cell Lines ◽  
Citrus Sinensis ◽  
Radical Scavenging ◽  
Maximum Effect ◽  
Citrus Reticulata ◽  
Citrus Fruits ◽  
Dpph Method ◽  
Anti Cancer ◽  
Citrus Peels

Background/objective: Cancer is a complex genetic disease that occurs due to mutation in genes that control apoptosis and cell growth. Uncontrolled cell growth leads to the formation of tumors. Free radical causes mutation in genes and DNA sequence, however antioxidants can stabilize these harmful effects. Citrus fruits are the rich source of antioxidants. owing to this property this study was planned to evaluate the potential of the citrus fruits for the treatment of the cancer. Aim: This study aimed to evaluate antioxidant as well anticancer potential of five different citrus strains (Citrus deliciosa, Citrus maxima, Citrus limetta, Citrus sinensis and Citrus reticulata). Methods: Peel of all the citrus fruits were collected, grinded and ethanolic extracts were prepared separately, to evaluate radical scavenging ability by employing DPPH method followed by MTT assay of the cancer cell lines to explore the anticancer potential of the extracts. Results: It was observed that citrus peels exhibited good radical scavenging activity and inhibited tumor growth. Maximum effect was produced by Citrus reticulata, and least results were obtained with Citrus sinensis. Conclusion: It was concluded that antioxidant and anti-cancer effects of citrus peels may be due to be owing to the presence of antioxidants (ascorbic acid, flavonoids, phenols, limonene). This research might open new horizon in the treatment of cancer chemotherapy.

DROUGHT OCCURRENCE UNDER LITHUANIAN CLIMATIC CONDITIONS

2015 ◽  
Author(s):  
Laima TAPARAUSKIENĖ ◽  
Veronika LUKŠEVIČIŪTĖ
Keyword(s):  
Meteorological Data ◽  
Standardized Precipitation Index ◽  
Vegetation Period ◽  
Climatic Conditions ◽  
Precipitation Record ◽  
Calculation Step ◽  
Drought Conditions ◽  
The Standardized Precipitation Index ◽  
June July

This study provides the analysis of drought conditions of vegetation period in 1982-2014 year in two Lithuanian regions: Kaunas and Telšiai. To identify drought conditions the Standardized Precipitation Index (SPI) was applied. SPI was calculated using the long-term precipitation record of 1982–2014 with in-situ meteorological data. Calculation step of SPI was taken 1 month considering only vegetation period (May, June, July, August, September). The purpose of investigation was to evaluate the humidity/aridity of vegetation period and find out the probability of droughts occurrence under Lithuanian climatic conditions. It was found out that according SPI results droughts occurred in 14.5 % of all months in Kaunas region and in 15.8 % in Telšiai region. Wet periods in Kaunas region occurred in 15.8 %, and in Telšiai region occurrence of wet periods was – 18.8 % from all evaluated months. According SPI evaluation near normal were 69.7 % of total months during period of investigation in Kaunas and respectively – 65.5 % in Telšiai. The probability for extremely dry period under Lithuania climatic conditions are pretty low – 3.0 % in middle Lithuania and 2.4 % in western part of Lithuania.

scholarly journals Differential Influences of Teleconnections from the Indian and Pacific Oceans on Rainfall Variability in Southeast Asia

Atmosphere ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 886
Author(s):  
Abdul Azim Amirudin ◽  
Ester Salimun ◽  
Fredolin Tangang ◽  
Liew Juneng ◽  
Muhamad Zuhairi
Keyword(s):  
Indian Ocean ◽  
Southeast Asia ◽  
El Niño ◽  
El Nino ◽  
Rainfall Variability ◽  
June July August ◽  
Rainfall Patterns ◽  
Negative Impacts ◽  
The Individual ◽  
June July

This study investigates the individual and combined impacts of El Niño and the positive Indian Ocean Dipole (IOD) on the Southeast Asia (SEA) rainfall variability. Using composite and partial correlation techniques, it is shown that both inter-annual events have individually distinct impacts on the SEA rainfall anomaly distribution. The results showed that the impacts of the co-occurrence of El Niño and IOD events are significant compared to the individual effects of pure El Niño or pure IOD. During June-July-August and September-October-November, the individual impacts of the pure El Niño and IOD events are similar but less significant. Both events caused negative impacts over the southern part of SEA during June-July-August (JJA) and propagated northeastward/eastward during September-October-November (SON). Thus, there are significant negative impacts over the southern part of SEA during the co-occurrence of both events. The differential impacts on the anomalous rainfall patterns are due to the changes in the sea surface temperature (SST) surrounding the region. Additionally, the differences are also related to the anomalous regional atmospheric circulations that interact with the regional SST. The anomalous Walker circulation that connects the Indian Ocean and tropical Pacific Ocean also plays a significant role in determining the regional anomalous rainfall patterns.

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