scholarly journals Isolation and identification of Xenorhabdus and Photorhabdus bacteria associated with entomopathogenic nematodes and their larvicidal activity against Aedes aegypti

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Chamaiporn Fukruksa ◽  
Thatcha Yimthin ◽  
Manawat Suwannaroj ◽  
Paramaporn Muangpat ◽  
Sarunporn Tandhavanant ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Entomopathogenic Nematodes ◽  
Isolation And Identification

scholarly journals Identification of entomopathogenic nematodes and symbiotic bacteria from Nam Nao National Park in Thailand and larvicidal activity of symbiotic bacteria against Aedes aegypti and Aedes albopictus

PLoS ONE ◽  
2018 ◽  
Vol 13 (4) ◽  
pp. e0195681 ◽  
Author(s):  
Temsiri Yooyangket ◽  
Paramaporn Muangpat ◽  
Raxsina Polseela ◽  
Sarunporn Tandhavanant ◽  
Aunchalee Thanwisai ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Aedes Albopictus ◽  
National Park ◽  
Entomopathogenic Nematodes ◽  
Symbiotic Bacteria

scholarly journals [NO TITLE AVAILABLE]

2008 ◽  
Vol 50 (1) ◽  
pp. 26-28 ◽  
Author(s):  
Regina Geris ◽  
Ionizete Garcia da Silva ◽  
Heloísa Helena Garcia da Silva ◽  
Andersson Barison ◽  
Edson Rodrigues-Filho ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Confidence Intervals ◽  
Organic Solvents ◽  
Yellow Fever ◽  
Larvicidal Activity ◽  
Distilled Water ◽  
Isolation And Identification ◽  
Principal Vector ◽  
Toxic Compound ◽  
Lc50 And Lc90

The objective of this study was to evaluate the larvicidal activity of diterpenoids obtained from the oil-resin of Copaifera reticulata against Aedes aegypti larvae, the principal vector of dengue and urban yellow fever. Four diterpenes were obtained from oil-resin extraction with organic solvents and subsequent chromatographic and spectroscopic procedures allowed to isolation and identification of these compounds as 3-b-acetoxylabdan-8(17)-13-dien-15-oic acid (1), alepterolic acid (2), 3-b-hidroxylabdan-8(17)-en-15-oic acid (3), and ent-agatic acid (4). Each compound was previously dissolved in dimethylsulphoxide, and distilled water was added to obtain the desired concentrations. Twenty larvae of third instars were placed into plastic beckers, containing the solution test (25 mL), in a five repetitions scheme, and their mortality, indicated by torpor and darkening of the cephalic capsule, was recorded after 48h. Probit analyses were used to determine lethal concentrations (LC50 and LC90) and their respective 95% confidence intervals. This study showed that only diterpenoids 1 and 2 exhibited larvicidal properties with LC50 of 0.8 ppm and 87.3 ppm, respectively, revealing the former as the most toxic compound against third instars of Ae. aegypti. Therefore, this compound seems to be an interesting source for new metabolite to be exploited.

A Simple and Efficient Protocol for the Knoevenagel Reaction of Benzylidenemalononitriles and the Evaluation of the Larvicidal Activity on Aedes Aegypti

2018 ◽  
pp. 362-374
Author(s):  
Harlyson L. Carvalho ◽  
Andréia L. de Amorim ◽  
Inana F. Araújo ◽  
Bianca L. B. Marino ◽  
David E. Q. Jimenez ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Knoevenagel Reaction

LARVICIDAL ACTIVITY OF SOME CERRADO PLANT EXTRACTS AGAINST AEDES AEGYPTI

2006 ◽  
Vol 22 (2) ◽  
pp. 314-317 ◽  
Author(s):  
A. M. S. RODRIGUES ◽  
J. E. DE PAULA ◽  
N. DEGALLIER ◽  
J. F. MOLEZ ◽  
L. S. ESPÍNDOLA
Keyword(s):  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Plant Extracts

scholarly journals Larvicidal Activity of essential oils from Brazilian plants against Aedes aegypti L.

2004 ◽  
Vol 99 (5) ◽  
pp. 541-544 ◽  
Author(s):  
Eveline Solon Barreira Cavalcanti ◽  
Selene Maia de Morais ◽  
Michele Ashley A Lima ◽  
Eddie William Pinho Santana
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Larvicidal Activity

scholarly journals Bioassay-guided isolation and identification of Aedes aegypti larvicidal and biting deterrent compounds from Veratrum lobelianum

2018 ◽  
Vol 16 (1) ◽  
pp. 324-332 ◽  
Author(s):  
Nurhayat Tabanca ◽  
Zulfiqar Ali ◽  
Ulrich R. Bernier ◽  
Nancy Epsky ◽  
Ayse Nalbantsoy ◽  
...  
Keyword(s):  
Larvicidal Activity ◽  
Ethanol Extract ◽  
Ethyl Linoleate ◽  
Significant Activity ◽  
Isolation And Identification ◽  
Human Carcinoma ◽  
Ethyl Palmitate ◽  
H Nmr ◽  
Bioassay Guided Fractionation ◽  
Nmr Techniques

AbstractAn ethanol extract fromVeratrum lobelianumBernh. rhizomes showed larvicidal activity with LC50values of 11.79 ppm and 89.9 ppm against 1stand 4thinstar larvae, respectively, at 24 h post-treatment. The extract also showed proportion not biting (PNB) value of 0.76 at 100 μg/cm2against females ofAe.aegypti. Systematic bioassay-guided fractionation ofV.lobelianumextract resulted in the isolation of five compounds that were identified as ethyl palmitate (1), ethyl linoleate (2), β-sitosterol (3), resveratrol (4) and oxyresveratrol (5) by GC-MS,1H-NMR, and13C-NMR techniques, comparison with literature data, and confirmation with authentic compounds. Compound2exhibited larvicidal activity with an LC50value of 24.1 (22.0-26.2) ppm whereas1was inactive. β-Sitosterol (3) displayed the highest larvicidal activity with LC50= 1.7 (1.3-12.3) ppm and LC90= 5.1 (3.4-13.8) ppm. Compounds4and5had larvicidal activity with LC50values of 18.5 (15.3-23.3) and 22.6 (19.0-26.8) ppm, respectively, and had an equivalent PNB values of 0.75 at 25 nmol/cm2. In addition,4and5were explored for their human-based repellency againstAe.aegypti, attractiveness against male medfliesCeratitis capitata, and also evaluated against series of human carcinoma cells (A549, HEK293, HeLa, SH-SY5Y); however, no significant activity was found.

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