scholarly journals Chemical Composition, Larvicidal Activity, and Enzyme Inhibition of the Essential Oil of Lippia grata Schauer from the Caatinga Biome against Dengue Vectors

2021 ◽  
Vol 14 (3) ◽  
pp. 250
Author(s):  
Stênio Freitas Felix ◽  
Alzeir Machado Rodrigues ◽  
Ana Livya Moreira Rodrigues ◽  
José Claudio Carneiro de Freitas ◽  
Daniela Ribeiro Alves ◽  
...  
Keyword(s):  
Essential Oil ◽  
Larvicidal Activity ◽  
Synergistic Action ◽  
Total Proteins ◽  
Rainy Period ◽  
Larvicidal Effect ◽  
Caatinga Biome ◽  
Continuous Use ◽  
Dengue Vectors ◽  
Better Than

Insect resistance and environmental pollution are among the drawbacks of continuous use of synthetic insecticides against the vectors of dengue, Aedesaegypti and Aedes albopictus. The objective of this study was to analyze the composition of the essential oil of Lippia grata Schauer collected from plants, in three periods of the year, to compare the larvicidal activity and enzymatic inhibition of the dengue vectors. The oilsanalyzed by gas chromatography coupled to mass spectrometry (GC-MS), presented thymol and 1,8-cineole, as the main constituents, in all three periods. This composition was different from that found in previous studies of the species from different places, thus, suggesting a new chemotype of Lippia grata. Larvicidal tests were performed at concentrations of 100, 75, 50, 25, and 12.5 μg.mL−1 and the essential oil from the rainy season showed the best results, with LC50 of 22.79 μg.mL−1 and 35.36 μg.mL−1 against Ae. aegypti and Ae. albopictus, respectively; this result was better than other reports. In the rainy period, however, there was a greater variety of components, which led to a better larvicidal effect, possibly due to synergistic action with minor constituents. Total proteins, amylases, and acetylcholinesterase of both species were inhibited by the oils.

scholarly journals Chemical profile and larvicidal activity of essential oil obtained from the leaves of Plectranthus amboinicus (Lour.) Spreng

2021 ◽  
Vol 10 (4) ◽  
pp. e15410413846
Author(s):  
Ana Patrícia Matos Pereira ◽  
Thércia Gabrielle Teixeira Martins ◽  
Mariana Oliveira Arruda ◽  
Andressa Almeida Santana Dias ◽  
Laiane Araujo da Silva Souto ◽  
...  
Keyword(s):  
Essential Oil ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Chemical Constituents ◽  
Larval Mortality ◽  
Chemical Constituent ◽  
Chemical Profile ◽  
Larvicidal Effect ◽  
Probit Method ◽  
Plectranthus Amboinicus

This study aimed to determine the chemical constituents and larvicidal activity of the essential oil of Plectranthus amboinicus (Lour.) Spreng against larvae of the Aedes aegypti mosquito. The essential oil (EO) was extracted by hydrodistillation at 100 ° C for 3 hours. The chemical composition was obtained by Gas Chromatography coupled to Mass Spectrometry (GC / MS). To assess larvicidal activity, Aedes aegypti larvae were subjected to EO solutions in concentrations of 10-100 mg L-1, where larval mortality was assessed and the LC50 was determined using the Probit method. The main chemical constituent found in the EO was carvacrol, which is considered to be very promising for pharmaceutical synthesis. The EO showed larvicidal activity with an LC50 of 28.52 mg L-1. According to the results found, it was possible to evaluate that the analyzed EO is composed of substances that have an efficient larvicidal effect against Aedes aegypti, thus encouraging its potential for application.

scholarly journals Chemical Compositions, Mosquito Larvicidal and Antimicrobial Activities of Essential Oils from Five Species of Cinnamomum Growing Wild in North Central Vietnam

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1303 ◽  
Author(s):  
Do N. Dai ◽  
Nguyen T. Chung ◽  
Le T. Huong ◽  
Nguyen H. Hung ◽  
Dao T.M. Chau ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oil ◽  
Essential Oils ◽  
Larvicidal Activity ◽  
Antimicrobial Agents ◽  
Chemical Compositions ◽  
North Central ◽  
Mosquito Larvicidal Activity ◽  
Central Vietnam ◽  
Leaf Essential Oil

Members of the genus Cinnamomum (Lauraceae) have aromatic volatiles in their leaves and bark and some species are commercially important herbs and spices. In this work, the essential oils from five species of Cinnamomum (C. damhaensis, C. longipetiolatum, C. ovatum, C. polyadelphum and C. tonkinense) growing wild in north central Vietnam were obtained by hydrodistillation, analyzed by gas chromatography and screened for antimicrobial and mosquito larvicidal activity. The leaf essential oil of C. tonkinense, rich in β-phellandrene (23.1%) and linalool (32.2%), showed excellent antimicrobial activity (MIC of 32 μg/mL against Enterococcus faecalis and Candida albicans) and larvicidal activity (24 h LC50 of 17.4 μg/mL on Aedes aegypti and 14.1 μg/mL against Culex quinquefasciatus). Cinnamomum polyadelphum leaf essential oil also showed notable antimicrobial activity against Gram-positive bacteria and mosquito larvicidal activity, attributable to relatively high concentrations of neral (11.7%) and geranial (16.6%). Thus, members of the genus Cinnamomum from Vietnam have shown promise as antimicrobial agents and as potential vector control agents for mosquitoes.

scholarly journals Antioxidant capacity and larvicidal activity of essential oil and extracts from Lippia grandis

2011 ◽  
Vol 21 (1) ◽  
pp. 0-0 ◽  
Author(s):  
Evelyn Ivana T. Damasceno ◽  
Joyce Kelly R. Silva ◽  
Eloisa Helena A. Andrade ◽  
Pergentino José C. Sousa ◽  
José Guilherme S. Maia
Keyword(s):  
Essential Oil ◽  
Antioxidant Capacity ◽  
Larvicidal Activity

scholarly journals Action ofCoriandrum sativumL. Essential Oil upon OralCandida albicansBiofilm Formation

2011 ◽  
Vol 2011 ◽  
pp. 1-9 ◽  
Author(s):  
V. F. Furletti ◽  
I. P. Teixeira ◽  
G. Obando-Pereda ◽  
R. C. Mardegan ◽  
A. Sartoratto ◽  
...  
Keyword(s):  
Essential Oil ◽  
Biofilm Formation ◽  
Plant Material ◽  
Inhibitory Concentration ◽  
Chemical Characterization ◽  
Synergistic Action ◽  
Biofilm Growth ◽  
Water Distillation ◽  
Microdilution Method

The efficacy of extracts and essential oils fromAllium tuberosum, Coriandrum sativum, Cymbopogon martini, Cymbopogon winterianus,andSantolina chamaecyparissuswas evaluated againstCandidaspp. isolates from the oral cavity of patients with periodontal disease. The most active oil was fractionated and tested againstC. albicansbiofilm formation. The oils were obtained by water-distillation and the extracts were prepared with macerated dried plant material. The Minimal Inhibitory Concentration—MIC was determined by the microdilution method. Chemical characterization of oil constituents was performed using Gas Chromatography and Mass Spectrometry (GC-MS). C. sativum activity oil upon cell and biofilm morphology was evaluated by Scanning Electron Microscopy (SEM). The best activities against planktonicCandidaspp. were observed for the essential oil and the grouped F8–10fractions fromC. sativum. The crude oil also affected the biofilm formation inC. albicanscausing a decrease in the biofilm growth. Chemical analysis of the F8–10fractions detected as major active compounds, 2-hexen-1-ol, 3-hexen-1-ol and cyclodecane. Standards of these compounds tested grouped provided a stronger activity than the oil suggesting a synergistic action from the major oil constituents. The activity ofC. sativumoil demonstrates its potential for a new natural antifungal formulation.

scholarly journals COMPOSIÇÃO QUÍMICA DO ÓLEO ESSENCIAL DA OCOTEA DIOSPYRIFOLIA (MEZ) (LAURACEAE) E AÇÃO SINÉRGICA / CHEMICAL COMPOSITION OF OCOTEA DIOSPYRIFOLIA ESSENTIAL OIL (MEZ) (LAURACEAE) AND SYNERGISTIC ACTION

2020 ◽  
Vol 6 (12) ◽  
pp. 102714-102730
Author(s):  
Elisandra de Oliveira Santos ◽  
Viviane Mallmann ◽  
Valdete de Souza Silva ◽  
Willian Ferreira da Costa ◽  
Etenaldo Felipe Santiago ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Synergistic Action

scholarly journals Chemical composition and insecticidal activity of Garcinia gardneriana (Planchon & Triana) Zappi (Clusiaceae) essential oil

2021 ◽  
Vol 20 (5) ◽  
pp. 503-514
Author(s):  
Carla Maria Mariano Fernandez ◽  
◽  
Fabiana Brusco Lorenzetti ◽  
Sirlene Adriana Kleinubing ◽  
Joao Paulo Pinguello de Andrade ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Essential Oil ◽  
Immersion Test ◽  
Acaricidal Activity ◽  
Gas Chromatography Mass Spectrometry ◽  
Larvicidal Effect ◽  
Sesquiterpene Hydrocarbons

The present study aimed to analyze the chemical composition of the essential oil from Garcinia gardneriana (Planchon & Triana) Zappi leaves and fruits, and to determine its acaricidal activity on Rhipicephalus microplus by larval packet test and larvicidal action on Aedes aegypti by larval immersion test. The chemical analysis of the essential oil by gas chromatography-mass spectrometry identified sesquiterpene hydrocarbons and oxygenated sesquiterpenes in bacupari leaves and fruits, and α-cedrene, α-chamigrene, α-trans-bergamotene, and β-curcumene as major compounds. Essential oil from leaves of G. gardneriana presented acaricidal activity on R. microplus (LC50 = 4.8 mg/mL; LC99 = 10.8 mg/mL) and larvicidal effect on A. aegypti (LC50 = 5.4 mg/mL; LC99 = 11.6 mg/mL), whereas essential oil from the fruits of G. gardneriana showed LC50 = 4.6 mg/mL and LC99 = 8.9 mg/mL against R. microplus and LC50 = 6.4 mg/mL and LC99 = 13.9 mg/mL against A. aegypti. These results thus demonstrate the potential acaricidal and larvicidal activity of essential oil of G. gardneriana, offering new perspectives for the realization of bioassays from this essential oil.

Repellent and Larvicidal Activity of the Essential Oil From Eucalyptus nitens Against Aedes aegypti and Aedes albopictus (Diptera: Culicidae)

2017 ◽  
Vol 54 (3) ◽  
pp. 670-676 ◽  
Author(s):  
Agustín Alvarez Costa ◽  
Cecilia V. Naspi ◽  
Alejandro Lucia ◽  
Héctor M. Masuh
Keyword(s):  
Essential Oil ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Aedes Albopictus ◽  
Eucalyptus Nitens

scholarly journals Green drugs in the fight against Anisakis simplex—larvicidal activity and acetylcholinesterase inhibition of Origanum compactum essential oil

2018 ◽  
Vol 117 (3) ◽  
pp. 861-867 ◽  
Author(s):  
Víctor López ◽  
María Cascella ◽  
Giovanni Benelli ◽  
Filippo Maggi ◽  
Carlota Gómez-Rincón
Keyword(s):  
Essential Oil ◽  
Larvicidal Activity ◽  
Anisakis Simplex ◽  
Acetylcholinesterase Inhibition ◽  
Origanum Compactum

Larvicidal activity against Aedes aegypti of essential oil of Laurus nobilis leaves obtained at different seasons

2018 ◽  
Vol 30 (5) ◽  
pp. 379-387 ◽  
Author(s):  
Carla Maria Mariano Fernandez ◽  
Maurício Ferreira da Rosa ◽  
Ana Claudia Aparecida Mariano Fernandez ◽  
Fabiana Brusco Lorenzetti ◽  
Keila Fernanda Raimundo ◽  
...  
Keyword(s):  
Essential Oil ◽  
Aedes Aegypti ◽  
Larvicidal Activity ◽  
Laurus Nobilis ◽  
Different Seasons
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