Evaluation of antioxidant and larvicidal activities of selected tamarix species against the southern house mosquito “Culex quinquefasciatus (Say)”

2022 ◽  
Vol 54 (4) ◽  
Author(s):  
Izhar Ahmad ◽  
Ikram Ilahi ◽  
Asghari Bano
Keyword(s):  
Culex Quinquefasciatus ◽  
Larvicidal Activities

scholarly journals Larvicidal Activity of Inorganic Salts Against Anopheles Stephensi and Culex Quinquefasciatus

2020 ◽  
Vol 10 (1) ◽  
pp. 45-51
Author(s):  
Francis Zakanda Nsimba ◽  
Thierry Lengu Bobanga ◽  
Pius Zakayi Kabututu ◽  
Jean-Marie Iyamba Liesse
Keyword(s):  
Larvicidal Activity ◽  
Culex Quinquefasciatus ◽  
Anopheles Stephensi ◽  
Weak Acid ◽  
Inorganic Salts ◽  
Disease Vectors ◽  
Development Of Resistance ◽  
Late Instar ◽  
Dose Dependent Fashion ◽  
Larvicidal Activities

Mosquitoes transmit serious human diseases, causing millions of deaths worldwide every year and the development of resistance to chemical insecticides resulting in rebounding vectorial capacity. In this study, the larvicidal bioassays for activities of aqueous solutions of weak acid [(NH4)2SO4 and NaH2PO4] and weak base (Na2CO3 and NaHCO3) inorganic salts against late instar larvae of disease vectors Anopheles stephensi and Culex quinquefasciatus were carried out under laboratory settings. The four inorganic salts showed varied levels of larvicidal activities after 24 h-exposure on Anopheles stephensi and Culex quinquefasciatus larvae in a dose-dependent fashion. However, the larvicidal activities were relatively higher in Na2CO3 (LC50 = 3162 and 447 ppm) and NaHCO3 (LC50 = 5623 and 398 ppm) solutions as compared to those in (NH4)2SO4 (LC50 = 7943 and 1995 ppm) and NaH2PO4 (LC50 = 7943 and 7120 ppm). The present study showed that the inorganic salts Na2CO3, NaHCO3, (NH4)2SO4 and NaH2PO4 could serve as potential larviciding agents considering their low toxicity. Therefore, this study provides a first report on the larvicidal activity of the inorganic salts on mosquito larvae of disease vectors.

scholarly journals Efficacy of Antimicrobial and Larvicidal Activities of Green Synthesized Silver Nanoparticles Using Leaf Extract of Plumbago auriculata Lam

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1577 ◽  
Author(s):  
Lakshmanan Govindan ◽  
Sathiyaseelan Anbazhagan ◽  
Ammar B. Altemimi ◽  
Karthik Lakshminarayanan ◽  
Sivaranjan Kuppan ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Aedes Aegypti ◽  
Culex Quinquefasciatus ◽  
Docking Studies ◽  
Salivary Protein ◽  
Low Concentrations ◽  
Larvicidal Activities ◽  
Odorant Binding ◽  
Dose Dependent ◽  
Green Synthesized Silver Nanoparticles

This work reports the synthesis of silver nanoparticles (AgNPs) using aqueous extract of Plumbago auriculata, and evaluates their antibacterial and larvicidal activities. The synthesized silver nanoparticles were characterized by various spectroscopy techniques, such as FTIR, XRD, TEM, EDX, Zeta potential, and DLS. The synthesized AgNPs exhibited significant antibacterial activity against Gram-positive and Gram-negative bacteria, such as Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae. Furthermore, synthesized nanoparticles inhibited the fourth instars larvae of Aedes aegypti and Culex quinquefasciatus at the concentration of 45.1 and 41.1 µg/mL respectively. Results of dose-dependent studies showed that synthesized nanoparticles were also effective at low concentrations. Molecular docking studies performed with the salivary protein and odorant-binding protein of Aedes aegypti and Culex quinquefasciatus demonstrated that the naphthoquinone compound plumbagin exhibited reliable binding affinity towards the two enzymes. The findings thus reveal that the plant extract and its nanoparticles can be a better alternative to available chemicals to control mosquitos.

scholarly journals Ovicidal and larvicidal activities of some plant extracts against Aedes aegypti L. and Culex quinquefasciatus Say (Diptera: Culicidae)

2016 ◽  
Vol 6 (6) ◽  
pp. 468-471 ◽  
Author(s):  
Rajiv Gandhi Munusamy ◽  
Daniel Reegan Appadurai ◽  
Sivasankaran Kuppusamy ◽  
Gabriel Paulraj Michael ◽  
Ignacimuthu Savarimuthu
Keyword(s):  
Aedes Aegypti ◽  
Plant Extracts ◽  
Culex Quinquefasciatus ◽  
Larvicidal Activities

scholarly journals Essential Oil Compositions of Three Invasive Conyza Species Collected in Vietnam and Their Larvicidal Activities against Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus

Molecules ◽  
2020 ◽  
Vol 25 (19) ◽  
pp. 4576
Author(s):  
Tran Minh Hoi ◽  
Le Thi Huong ◽  
Hoang Van Chinh ◽  
Dang Viet Hau ◽  
Prabodh Satyal ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Culex Quinquefasciatus ◽  
Insect Pests ◽  
Gas Chromatography Mass Spectrometry ◽  
Tropical Regions ◽  
Persistent Problem ◽  
Aerial Parts ◽  
Increasing Demand ◽  
Larvicidal Activities

Mosquito-borne infectious diseases are a persistent problem in tropical regions of the world, including Southeast Asia. Vector control has relied principally on synthetic insecticides, but these have detrimental environmental effects and there is an increasing demand for plant-based agents to control insect pests. Invasive weedy plant species may be able to serve as readily available sources of essential oils, some of which may be useful as larvicidal agents for control of mosquito populations. We hypothesize that members of the genus Conyza (Asteraceae) may produce essential oils that may have mosquito larvicidal properties. The essential oils from the aerial parts of Conyza bonariensis, C. canadensis, and C. sumatrensis were obtained by hydrodistillation, analyzed by gas chromatography–mass spectrometry, and screened for mosquito larvicidal activity against Aedes aegypti, Ae. albopictus and Culex quinquefasciatus. The essential oils of C. canadensis and C. sumatrensis, both rich in limonene (41.5% and 25.5%, respectively), showed notable larvicidal activities against Ae. aegypti (24-h LC50 = 9.80 and 21.7 μg/mL, respectively) and Ae. albopictus (24-h LC50 = 18.0 and 19.1 μg/mL, respectively). These two Conyza species may, therefore, serve as sources for alternative, environmentally-benign larvicidal control agents.

scholarly journals MOSQUITO LARVICIDAL EFFICACY OF THE ACETONE LEAF EXTRACT OF SOLANUM TRILOBATUM AGAINST CULEX QUINQUEFASCIATUS AND AEDES AEGYPTI

2018 ◽  
Vol 11 (12) ◽  
pp. 273 ◽  
Author(s):  
Lalitha A ◽  
Thangapandiyan S
Keyword(s):  
Aedes Aegypti ◽  
Culex Quinquefasciatus ◽  
Leaf Extract ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Time Interval ◽  
Phytochemical Analysis ◽  
Spectrometry Analysis ◽  
Solanum Trilobatum ◽  
Larvicidal Activities

Objective: The main objective of our study is to control the vector-borne disease. It is one among the major disease burden in developing countries. There are lots of researches carried out using the various plant extracts against larvicidal activities of the Culex quinquefasciatus and Aedes aegypti. The present investigation was aimed to investigate the phytochemical analysis and mosquito larvicidal activities of Solanum trilobatum in acetone extract against the second instar larvae of C. quinquefasciatus and A. aegypti. Methods: The leaf extract of S. trilobatum was subjected to phytochemical analysis and Gas Chromatography–Mass Spectrometry analysis. The mortality rates of the second instar larvae were recorded after 24, 48, 72, and 96 h of exposure. The lethal concentration (LC)50 and LC90 were determined followed by probit analysis.Results: The LC50 values for C. quinquefasciatus were found to be 265.69 ppm, 227.59 ppm, 212.42 ppm, and 189.47 ppm at various time intervals, and the LC90 values were 558.27 ppm, 504.92 ppm, 479.09 ppm, and 444.28 ppm. Similarly, LC50 values for A. aegypti were noticed at 301.09 ppm, 256.01 ppm, 209.75 ppm, and 167.44 ppm and the LC90 values were 582.34 ppm, 477.52 ppm, 419.40 ppm, and 371.84 ppm for the time interval of 24 h, 48 h, 72 h, and 96 h.Conclusion: The result of the current work revealed that the leaf extract of the S. trilobatum has the potential to be acted as an alternative for the controlling of the mosquitoes.

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