scholarly journals The effect of photoperiod on life history and blood-feeding activity in Aedes albopictus and Aedes aegypti (Diptera: Culicidae)

2015 ◽  
Vol 40 (1) ◽  
pp. 164-171 ◽  
Author(s):  
K. S. Costanzo ◽  
S. Schelble ◽  
K. Jerz ◽  
M. Keenan
Keyword(s):  
Life History ◽  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Feeding Activity ◽  
Blood Feeding

scholarly journals Nootkatone Is an Effective Repellent against Aedes aegypti and Aedes albopictus

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 386
Author(s):  
Taylor C. Clarkson ◽  
Ashley J. Janich ◽  
Irma Sanchez-Vargas ◽  
Erin D. Markle ◽  
Megan Gray ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Insecticide Resistance ◽  
New Orleans ◽  
Aedes Albopictus ◽  
Zika Virus ◽  
Activity Index ◽  
Human Subjects ◽  
Blood Feeding ◽  
Spatial Activity ◽  
Insecticide Activity

We tested a nootkatone product for insecticide activity against the most prominent vectors of Zika virus (ZIKV), Aedes aegypti, and Aedes albopictus. We tested the permethrin-resistant (PERM-R) Vergel strain of A. aegypti and the permethrin-susceptible (PERM-S) New Orleans strain of A. aegypti to determine if insecticide resistance affected their susceptibility to nootkatone. Bottle bioassays showed that the PERM-S strain (New Orleans) was more susceptible to nootkatone than the confirmed A. aegypti permethrin-resistant (PERM-R) strain, Vergel. The A. albopictus strain ATM-NJ95 was a known PERM-S strain and Coatzacoalcos permethrin susceptibility was unknown but proved to be similar to the ATM-NJ95 PERM-S phenotype. The A. albopictus strains (ATM-NJ95 and Coatzacoalcos) were as susceptible to nootkatone as the New Orleans strain. Bottle bioassays conducted with ZIKV-infected mosquitoes showed that the New Orleans (PERM-S) strain was as susceptible to nootkatone as the mock-infected controls, but the PERM-R strain was less susceptible to nootkatone than the mock-infected controls. Repellency/irritancy and biting inhibition bioassays (RIBB) of A. aegypti determined whether the nootkatone-treated arms of three human subjects prevented uninfected A. aegypti mosquitoes from being attracted to the test subjects and blood-feeding on them. The RIBB analyses data calculated the spatial activity index (SAI) and biting inhibition factor (BI) of A. aegypti at different nootkatone concentrations and then compared the SAI and BI of existing repellency products. We concluded that nootkatone repelled mosquitoes at a rate comparable to 7% DEET or 5% picaridin and has the potential to be an efficacious repellent against adult A. aegypti mosquitoes.

scholarly journals Evaluation of Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus Mosquitoes Competence to Oropouche virus Infection

Viruses ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 755
Author(s):  
Silvana F. de Mendonça ◽  
Marcele N. Rocha ◽  
Flávia V. Ferreira ◽  
Thiago H. J. F Leite ◽  
Siad C. G. Amadou ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Culex Quinquefasciatus ◽  
Mosquito Species ◽  
Blood Feeding ◽  
Viral Pathogens ◽  
Tropical Regions ◽  
Vertebrate Hosts ◽  
Geographic Expansion ◽  
Immunocompromised Mice

The emergence of new human viral pathogens and re-emergence of several diseases are of particular concern in the last decades. Oropouche orthobunyavirus (OROV) is an arbovirus endemic to South and Central America tropical regions, responsible to several epidemic events in the last decades. There is little information regarding the ability of OROV to be transmitted by urban/peri-urban mosquitoes, which has limited the predictability of the emergence of permanent urban transmission cycles. Here, we evaluated the ability of OROV to infect, replicate, and be transmitted by three anthropophilic and urban species of mosquitoes, Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus. We show that OROV is able to infect and efficiently replicate when systemically injected in all three species tested, but not when orally ingested. Moreover, we find that, once OROV replication has occurred in the mosquito body, all three species were able to transmit the virus to immunocompromised mice during blood feeding. These data provide evidence that OROV is restricted by the midgut barrier of three major urban mosquito species, but, if this restriction is overcome, could be efficiently transmitted to vertebrate hosts. This poses a great risk for the emergence of permanent urban cycles and geographic expansion of OROV to other continents.

scholarly journals Influence of Temperature on the Life-Cycle Dynamics of Aedes albopictus Population Established at Temperate Latitudes: A Laboratory Experiment

Insects ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 808
Author(s):  
Giovanni Marini ◽  
Mattia Manica ◽  
Daniele Arnoldi ◽  
Enrico Inama ◽  
Roberto Rosà ◽  
...  
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
Feeding Activity ◽  
Survival Rates ◽  
Blood Feeding ◽  
Health Concern ◽  
Adult Longevity ◽  
Published Data ◽  
Influence Of Temperature On ◽  
The One

The mosquito species Aedes albopictus has successfully colonized many areas at temperate latitudes, representing a major public health concern. As mosquito bionomics is critically affected by temperature, we experimentally investigated the influence of different constant rearing temperatures (10, 15, 25, and 30 °C) on the survival rates, fecundity, and developmental times of different life stages of Ae. albopictus using a laboratory colony established from specimens collected in northern Italy. We compared our results with previously published data obtained with subtropical populations. We found that temperate Ae. albopictus immature stages are better adapted to colder temperatures: temperate larvae were able to develop even at 10 °C and at 15 °C, larval survivorship was comparable to the one observed at warmer conditions. Nonetheless, at these lower temperatures, we did not observe any blood-feeding activity. Adult longevity and fecundity were substantially greater at 25 °C with respect to the other tested temperatures. Our findings highlight the ability of Ae. albopictus to quickly adapt to colder environments and provide new important insights on the bionomics of this species at temperate latitudes.

The effects of sublethal doses of hexaflumuron on the feeding behaviour of mosquitoes (Diptera: Culicidae)

1992 ◽  
Vol 82 (4) ◽  
pp. 535-538 ◽  
Author(s):  
V. Vasuki
Keyword(s):  
Aedes Aegypti ◽  
Feeding Behaviour ◽  
Anopheles Stephensi ◽  
Feeding Activity ◽  
Sublethal Effect ◽  
Blood Feeding ◽  
Insect Growth Regulator ◽  
The Other ◽  
Lower Blood ◽  
Sublethal Doses

AbstractThis paper presents the first report on the sublethal effect of an insect growth regulator (IGR), hexaflumuron, on the feeding behaviour of vector mosquitoes, Culex quinquefasciatus Say, Aedes aegypti (Linnaeus) and Anopheles stephensi Liston. Percentage engorgement and feeding behaviour of the adults of the three species emerged after sublethal exposures at the larval and pupal stages were markedly affected. Depression in blood feeding was significantly higher in Aedes aegypti with lower blood engorgement ratio. The proportion of females that failed to take a blood meal was higher in A. aegypti (30.2%) than in the other species when pupae had been exposed to 0.05 mg/1 hexaflumuron. Depression in blood feeding was probably due to abnormalities in the functioning of the mouth parts and feeding behaviour. No adverse effect on the feeding activity was noticed in the F1 generation of the treated species.

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