scholarly journals Reduction in Egg Fertility of Aedes albopictus Mosquitoes in Greece Following Releases of Imported Sterile Males

Insects ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 110
Author(s):  
Georgios Balatsos ◽  
Arianna Puggioli ◽  
Vasileios Karras ◽  
Ioanna Lytra ◽  
George Mastronikolos ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Sterile Male ◽  
Major Step ◽  
Egg Hatch ◽  
Hatch Rate ◽  
Additional Tool ◽  
Invasive Mosquito ◽  
Environmentally Safe ◽  
Male Mosquitoes

Aedes albopictus, an invasive mosquito species, is currently well established in many European countries, posing high risks to human health. A preliminary trial using repetitive releases of irradiated sterile male mosquitoes was designed, implemented and evaluated for the first time in Greece. The main scope of this trial was to investigate the efficacy of sterile insect technique (SIT) on wild population egg hatch rate in Greece using mass-produced sterile male mosquitoes from another country (Italy). The study was conducted in Vravrona area, close to Athens International Airport (Attica Region). The number of eggs laid in ovitraps was similar in all intervention and control plots. However, a significant reduction in egg hatch rate was recorded in the SIT plot in comparison with both control plots starting two weeks after the first release. This trial validates the logistics (transportation, releases handling and monitoring) as a major step towards implementing efficient, environmentally safe control approaches as an additional tool against the invasive Aedes species in Greece and more widely in Europe.

scholarly journals Effects of Selection to Diflubenzuron and Bacillus thuringiensis Var. Israelensis on the Overwintering Successes of Aedes albopictus (Diptera: Culicidae)

Insects ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 822
Author(s):  
Charalampos S. Ioannou ◽  
Christos Hadjichristodoulou ◽  
Varvara A. Mouchtouri ◽  
Nikos T. Papadopoulos
Keyword(s):  
Bacillus Thuringiensis ◽  
Aedes Albopictus ◽  
Selection Process ◽  
Mosquito Species ◽  
Fold Increase ◽  
Development Of Resistance ◽  
Control Programmes ◽  
Invasive Mosquito ◽  
In The Wild ◽  
Successive Generations

Aedes albopictus is an invasive mosquito species responsible for local transmission of chikungunya and dengue viruses in Europe. In the absence of available treatments, insecticides-based control remains one of the most important viable strategies to prevent emerging problems. Diflubenzuron (DFB) and Bacillus thuringiensis var. israelensis (Bti) are among the most commonly used larvicides for Ae. albopictus control with consequent concerns for the potential development of resistance. Studies on the resistance emergence in Ae. albopictus and its persistence in the wild to both DFB and Bti are essential for the efficient and sustainable planning of the control programmes. In this context, larvae from a recently laboratory established population were subjected to increasing selective pressure for nine successive generations using both DFB and Bti. The resistance levels and the overwintering success of the selected populations relative to control (colonies that received no selection) were determined. Results revealed an 8.5- and 1.6-fold increase on the resistance levels following selection with DFB and Bti, respectively. The selection process to both larvicides had no apparent impacts on the overwintering capability relative to control, suggesting the successful persistence of the selected individuals in the wild on an annual base.

Practical management plan for invasive mosquito species in Europe: I. Asian tiger mosquito (Aedes albopictus)

2020 ◽  
Vol 35 ◽  
pp. 101691 ◽  
Author(s):  
Romeo Bellini ◽  
Antonios Michaelakis ◽  
Dušan Petrić ◽  
Francis Schaffner ◽  
Bulent Alten ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Management Plan ◽  
Asian Tiger Mosquito ◽  
Invasive Mosquito Species ◽  
Practical Management ◽  
Asian Tiger ◽  
Invasive Mosquito ◽  
Tiger Mosquito

scholarly journals A LAMP-based colorimetric assay to expedite field surveillance of the invasive mosquito species Aedes aegypti and Aedes albopictus

2020 ◽  
Vol 14 (3) ◽  
pp. e0008130 ◽  
Author(s):  
Bixing Huang ◽  
Brian L. Montgomery ◽  
Rebecca Adamczyk ◽  
Gerhard Ehlers ◽  
Andrew F. van den Hurk ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Colorimetric Assay ◽  
Mosquito Species ◽  
Invasive Mosquito Species ◽  
Invasive Mosquito

Detection of the invasive mosquito species Aedes albopictus in southern England

2017 ◽  
Vol 17 (2) ◽  
pp. 140 ◽  
Author(s):  
Jolyon M Medlock ◽  
Alexander GC Vaux ◽  
Benjamin Cull ◽  
Francis Schaffner ◽  
Emma Gillingham ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Southern England ◽  
Invasive Mosquito Species ◽  
Invasive Mosquito

scholarly journals The First Record of the Invasive Mosquito Species Aedes Albopictus in Chisinau, Republic of Moldova, 2020

2021 ◽  
Author(s):  
Tatiana Sulesco ◽  
Galina Busmachiu ◽  
Unchana Lange ◽  
Jonas Schmidt-Chanasit ◽  
Renke Lühken
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
First Record ◽  
Border Crossing ◽  
Molecular Barcoding ◽  
Republic Of Moldova ◽  
International Airport ◽  
Action Project ◽  
Invasive Mosquito ◽  
The Republic

Abstract BackgroundIn Europe, Ae. albopictus is an important vector of chikungunya virus, Dirofilaria nematodes and was involved in local autochthonous circulation of dengue virus and Zika virus. Due to the ongoing spread, a targeted field surveillance at potential points-of-entries for Aedes invasive mosquitoes was initiated for the Republic of Moldova in 2020 as part of the transboundary “Aedes Invasive Mosquito COST Action project”. MethodsIn 2020, ovitraps were positioned at each of three locations: the border crossing to Romania in Leuseni (Hancesti region), Chisinau International Airport and Chisinau Botanical Garden.ResultsA total of 188 Aedes spp. eggs were collected at the Chisinau International Airport between August and September 2020. Twenty-three adults reared in the laboratory were identified morphologically as Aedes albopictus (Skuse, 1895) and twelve selected specimens were confirmed by molecular barcoding of the cytochrome oxidase subunit I gene region. In addition, one adult female of Ae. albopictus was caught at the same site with a manual aspirator from a human.ConclusionsThis is the first documented report of Ae. albopictus in the Republic of Moldova. The presence of immature and adult stages indicates the local reproduction of the species in the country. Therefore, it is crucial to extend and strengthen surveillance of the invasive Aedes mosquitoes to prevent Ae. albopictus and other exotic mosquito species from establishing in the Republic of Moldova.

scholarly journals From a Long-distance Threat to the Invasion Front: Invasive Aedes Mosquito Species in Belgium Between 2007 and 2020

2021 ◽  
Author(s):  
Isra Deblauwe ◽  
Katrien De Wolf ◽  
Jacobus De Witte ◽  
Anna Schneider ◽  
Ingrid Verlé ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Aedes Mosquito ◽  
Long Distance ◽  
Invasion Front ◽  
Management Actions ◽  
Invasive Mosquito ◽  
And Control ◽  
Control Management

Abstract Background: Invasive mosquito species (IMS) and their associated mosquito-borne diseases are emerging in Europe. In Belgium, the first detection of Aedes albopictus occurred in 2000 and of Aedes japonicus in 2002. Early detection and control of these IMS at points of entry (PoE’s) are of paramount importance to slow down any possible establishment. This paper gives an account of the IMS surveillance in Belgium between 2007 and 2020 and reviews the introductions and establishments recorded in that period.Methods: In total 52 PoE’s were monitored at least once for the presence of IMS between 2007 and 2020. These included used tyre and lucky bamboo import companies, airports, ports, parking lots along highways, shelters for imported cutting plants, wholesale markets, industrial areas, recycling areas, and cemeteries and an allotment garden at the country border with colonised areas. In general, monitoring was performed between April and November. Mosquitoes were captured with adult and oviposition traps, as well as by larval sampling. A logistic regression was performed to investigate the percentage of positive PoE’s for Ae. albopictus over the years. Results: Aedes albopictus has been detected at ten PoE’s, Ae. japonicus at three PoE’s and Aedes koreicus at two PoE’s. The latter two species have established overwintering populations. The percentage of PoE’s positive for Ae. albopictus increased significantly over time. Aedes albopictus is currently entering Belgium through lucky bamboo trade, used tyre trade and passive ground transport, while Ae. japonicus only through the latter two pathways. In Belgium, the import through passive ground transport was first recorded in 2018 and its importance seems to grow.Conclusion: Belgium is currently at the invasion front of Ae. albopictus and Ae. japonicus. The surveillance and control management actions at well-known PoE‘s associated to long-distance introductions are more straightforward than at less-defined PoE’s associated with short-distance introductions from colonised areas. These latter PoE’s represent a new challenge for IMS management in Belgium in the coming years and stresses the urgence of implementing a sustainable, structured and long-term IMS management programme, integrating active and passive surveillance and control.

scholarly journals Seasonal Dynamics and Spatial Distribution of Aedes albopictus (Diptera: Culicidae) in a Temperate Region in Europe, Southern Portugal

2020 ◽  
Vol 17 (19) ◽  
pp. 7083
Author(s):  
Hugo C. Osório ◽  
Jorge Rocha ◽  
Rita Roquette ◽  
Nélia M. Guerreiro ◽  
Líbia Zé-Zé ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Adult Population ◽  
Distribution Patterns ◽  
Effect Of Temperature ◽  
Maximum Temperature ◽  
Temperate Region ◽  
Average Maximum ◽  
Invasive Mosquito ◽  
Average Minimum Temperature

Aedes albopictus is an invasive mosquito that has colonized several European countries as well as Portugal, where it was detected for the first time in 2017. To increase the knowledge of Ae. albopictus population dynamics, a survey was carried out in the municipality of Loulé, Algarve, a Southern temperate region of Portugal, throughout 2019, with Biogents Sentinel traps (BGS traps) and ovitraps. More than 19,000 eggs and 400 adults were identified from May 9 (week 19) and December 16 (week 50). A positive correlation between the number of females captured in the BGS traps and the number of eggs collected in ovitraps was found. The start of activity of A. albopictus in May corresponded to an average minimum temperature above 13.0 °C and an average maximum temperature of 26.2 °C. The abundance peak of this A. albopictus population was identified from September to November. The positive effect of temperature on the seasonal activity of the adult population observed highlight the importance of climate change in affecting the occurrence, abundance, and distribution patterns of this species. The continuously monitoring activities currently ongoing point to an established population of A. albopictus in Loulé, Algarve, in a dispersion process to other regions of Portugal and raises concern for future outbreaks of mosquito-borne diseases associated with this invasive mosquito species.

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