Mosquito larvicidal activity of essential oils of Cymbopogon citratus and Thymus vulgaris grown in Cameroon

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
EG Nkouaya Mbanjo ◽  
F Tchoumbougnang ◽  
PM Jazet Dongmo ◽  
ML Sameza ◽  
PH Amvam Zollo ◽  
...  
Keyword(s):  
Essential Oils ◽  
Larvicidal Activity ◽  
Thymus Vulgaris ◽  
Cymbopogon Citratus ◽  
Mosquito Larvicidal Activity

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 Mosquito Larvicidal Activity of the Essential Oils of Erechtites Species Growing Wild in Vietnam

Insects ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 47 ◽  
Author(s):  
Nguyen Hung ◽  
Prabodh Satyal ◽  
Ho Hieu ◽  
Nguyen Chuong ◽  
Do Dai ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Vector Control ◽  
Larvicidal Activity ◽  
Mosquito Control ◽  
Low Cost ◽  
Gas Chromatography Mass Spectrometry ◽  
Mosquito Vector ◽  
Mosquito Larvicidal Activity ◽  
Aerial Parts

Mosquito-borne infections are a constant problem in Vietnam, and mosquito vector control is a primary approach to control these infections. Essential oils represent environmentally friendly alternatives to synthetic pesticides for mosquito control. The essential oils of two weedy species in Vietnam, Erechtites hieraciifolius and E. valerianifolius, have been obtained by hydrodistillation and analyzed by gas chromatography–mass spectrometry. The essential oils have been screened for mosquito larvicidal activity against Aedes albopictus, Ae. aegypti, and Culex quinquefasciatus. The essential oil from the aerial parts of E. hieraciifolius was rich in α-pinene (14.5%), limonene (21.4%), and caryophyllene oxide (15.1%), while E. valerianifolius essential oil was dominated by myrcene (47.8%) and α-pinene (30.2%). Both essential oils showed good larvicidal activity against Ae. albopictus (24-h LC50 10.5 and 5.8 μg/mL, respectively) and Ae. aegypti (24-h LC50 10.6 and 12.5 μg/mL, respectively). The essential oil of E. valerianifolius also showed good activity against Cx. quinquefasciatus larvae (24-h LC50 = 40.7 μg/mL). Thus, Erechtites essential oils may serve as low-cost vector control agents for mosquito-borne infections.

scholarly journals The Mosquito Larvicidal Activity of Essential Oils from Cymbopogon and Eucalyptus Species in Vietnam

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 128 ◽  
Author(s):  
Ho Dung Manh ◽  
Do Thi Hue ◽  
Nguyen Thi Thanh Hieu ◽  
Doan Thi Thanh Tuyen ◽  
Ong Thi Tuyet
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Larvicidal Activity ◽  
Eucalyptus Camaldulensis ◽  
Probit Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Eucalyptus Species ◽  
Eucalyptus Citriodora ◽  
Cymbopogon Citratus ◽  
Cymbopogon Winterianus

The larvicidal activity of essential oils (EOs) extracted from Cymbopogon citratus, Cymbopogon winterianus, Eucalyptus citriodora, and Eucalyptus camaldulensis aromatic plants grown in Vietnam was evaluated on Aedes aegypti larvae. The EOs were hydro-distilled in a Clevenger-type apparatus. The EOs were analyzed by gas chromatography–mass spectrometry (GC–MS). The mortality rates obtained from the bioassays were used to calculate the lethal concentrations (LC50) of the EOs by the probit analysis method. These essential oils exhibited toxicity to the larvae of Aedes aegypti. Results were obtained for Cymbopogon citratus (LC50 = 120.6 ppm), Cymbopogon winterianus (LC50 = 38.8 ppm), Eucalyptus citriodora (LC50 = 104.4 ppm), and Eucalyptus camaldulensis (LC50 = 33.7 ppm). The essential oils of Eucalyptus camaldulensis and Cymbopogon winterianus were found to be the most efficient, and their respective values of LC50 were 33.7 ppm, 38.8 ppm. In conclusion, this research adds to the growing body of literature on natural larvicides from essential oils against Aedes aegypti mosquitoes.

scholarly journals GC/MS Profiling and Insecticidal Potential of Essential Oils from Thymus vulgaris (Lamiaceae) and Cymbopogon citratus (Poaceae) against tomato borer, Tuta absoluta

2019 ◽  
Author(s):  
Marie Danièle T. Ngongang ◽  
Pierre Eke ◽  
Modeste Lambert Sameza ◽  
Champlain Lordon Djiéto ◽  
Fabrice Fekam Boyom
Keyword(s):  
Essential Oils ◽  
Lethal Dose ◽  
Field Trials ◽  
Tuta Absoluta ◽  
Thymus Vulgaris ◽  
Cymbopogon Citratus ◽  
Alpha Pinene ◽  
Lemongrass Oil ◽  
Recorded Data ◽  
Tomato Borer

This study aimed to determine the Gas Chrommatography (GC)-Mass Spectrometry (MS) profiles and insecticidal activity of essential oils (EOs) from Thymus vulgaris (Thyme) and Cymbopogon citratus (Lemongrass) against the invasive and devastating pest, Tuta absoluta (T. absoluta) through contact and fumigation routes. We found out that thyme oil was predominantly constituted of Thymol (22.16%), α-Pinene (15.35%) and p-Cymene (13.54%) whilst Neral (21.41%), Geranial (21.36%) and β-Myrcene (9.74%) were the major constituents of lemongrass oil. Lemongrass oil exhibited higher insecticidal efficiency irrespective of application mode with 50% lethal dose (LD50) values of 35.8 and 72.2 µL.L-1air on contact and fumigation routes, respectively. Lemongrass oil also lengthened pupal duration at all tested doses irrespective of application routes. The overall responses of Lemongrass oil surpassed that of the reference insecticide (Lynx®: Lambda-cyhalothrine; Acetamipride). Thus, the recorded data clearly showed the acute and long-term insecticidal effects of the studied EOs, though a greenhouse and open field trials are required prior to the validation of this approach as remediation measure for Integrated Pest Management (IPM) for tomato borer control in Cameroon and elsewhere.

scholarly journals Mosquito Larvicidal Activity on Aedes albopictus and Constituents of Essential Oils from Manglietia dandyi (Gagnep.) Dandy

2020 ◽  
Vol 14 (3) ◽  
pp. 201-206 ◽  
Author(s):  
Pham H. Ban ◽  
Le T. Huong ◽  
Tran M. Hoi ◽  
Nguyen H. Hung ◽  
Le D. Linh ◽  
...  
Keyword(s):  
Essential Oils ◽  
Larvicidal Activity ◽  
Aedes Albopictus ◽  
Mosquito Larvicidal Activity

scholarly journals Chemical Composition of Actinodaphne pilosa Essential Oil From Vietnam, Mosquito Larvicidal Activity, and Antimicrobial Activity

2020 ◽  
Vol 15 (4) ◽  
pp. 1934578X2091779
Author(s):  
Nguyen Thanh Chung ◽  
Le Thi Huong ◽  
Nguyen Huy Hung ◽  
Tran Minh Hoi ◽  
Do Ngoc Dai ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Essential Oils ◽  
Larvicidal Activity ◽  
Nature Reserve ◽  
Inhibitory Concentration ◽  
Flame Ionization Detection ◽  
Mosquito Larvicidal Activity ◽  
Flame Ionization ◽  
Germacrene D ◽  
Different Seasons

Leaves of Actinodaphne pilosa were collected at 2 different seasons from the Pù Hoạt Nature Reserve, Vietnam. The leaf samples were hydrodistilled to give essential oils, which were analyzed by gas chromatography (GC)–mass spectrometry and GC-flame ionization detection. The major components in the essential oils were α-pinene, ( Z)-β-ocimene, ( E)-β-ocimene, β-caryophyllene, germacrene D, bicyclogermacrene, and spathulenol. The essential oils were screened for antimicrobial activity against Enterococcus faecalis, Staphylococcus aureus, Bacillus cereus, Escherichia coli, Pseudomonas aeruginosa, and Candida albicans, as well as mosquito larvicidal activity against Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus. Actinodaphne pilosa leaf essential oils showed broad antimicrobial activity (minimum inhibitory concentration = 32, 64, 64, 16, and 16 μg/mL against E. faecalis, S. aureus, B. cereus, P. aeruginosa, and C. albicans, respectively) and excellent larvicidal activity (24-hour 50% lethal concentration = 19.0, 24.7, and 48.1 μg/mL against A. aegypti, A. albopictus, and C. quinquefasciatus, respectively).

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