Evaluation of larval toxicity, mode of action and chemical composition of citrus essential oils against Anopheles stephensi and Culex quinquefasciatus

2022 ◽  
pp. 102284
Author(s):  
Shivani Sharma ◽  
Neha Loach ◽  
Shweta Gupta ◽  
Lalit Mohan
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Culex Quinquefasciatus ◽  
Mode Of Action ◽  
Anopheles Stephensi ◽  
Citrus Essential Oils ◽  
Larval Toxicity

Grapefruit essential oils inhibit quorum sensing of Pseudomonas aeruginosa

2019 ◽  
Vol 26 (3) ◽  
pp. 231-241 ◽  
Author(s):  
María C Luciardi ◽  
M Amparo Blázquez ◽  
María R Alberto ◽  
Elena Cartagena ◽  
Mario E Arena
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Chemical Composition ◽  
Quorum Sensing ◽  
Essential Oils ◽  
Citrus Paradisi ◽  
Food Preservative ◽  
Bacterial Quorum Sensing ◽  
Citrus Essential Oils ◽  
Bacterial Quorum ◽  
Cold Pressed

Citrus essential oils are used in food to confer flavor and aromas. The citrus essential oils have been granted as GRAS and could be used as antimicrobial additives to control bacterial quorum sensing from potential food bacterial pathogens. The chemical composition and inhibitory activity of Citrus paradisi (grapefruit) essential oils obtained by cold-pressed method (EOP) and cold-pressed method followed by steam distillation, against Pseudomonas aeruginosa were determined . The GC-MS analyses of the oil indicated the amount of the essential oil components was highest with D-limonene in both cases. However, the extraction method modified the chemical composition. EOP had higher amount of coumarins and flavonoid as well as less oxygenated terpenoids. At 0.1 mg/mL essential oils were not able to modify the bacterial development but inhibited the P. aeruginosa biofilm production between 52% and 55%, sessile viability between 45% and 48%, autoinducer production and elastase activity between 30% and 56%. Limonene was less effective at inhibiting P. aeruginosa than the essential oils, suggesting a synergistic effect of the minor components. According to our results, grapefruit essential oils could be used as a food preservative to control P. aeruginosa virulence.

Chemical composition and repellent activity of nine medicinal essential oils against Anopheles stephensi, the main malaria vector

2020 ◽  
Author(s):  
Mohammad Djaefar Moemenbellah-Fard ◽  
Marziae Shahriari-Namadi ◽  
Hamid Reza Kelidari ◽  
Zahra Bastani Nejad ◽  
Hajar Ghasemi ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Malaria Vector ◽  
Anopheles Stephensi ◽  
Repellent Activity

Chemical Composition, Antimicrobial Activity, and Mode of Action of Essential Oils againstPaenibacillus larvae, Etiological Agent of American Foulbrood onApis mellifera

2017 ◽  
Vol 14 (4) ◽  
pp. e1600382 ◽  
Author(s):  
María C. Pellegrini ◽  
Rosa M. Alonso-Salces ◽  
María L. Umpierrez ◽  
Carmen Rossini ◽  
Sandra R. Fuselli
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Mode Of Action ◽  
Etiological Agent ◽  
American Foulbrood

scholarly journals Chemical composition and larvicidal activity of essential oils from Zingiber montanum (J. Koenig) Link ex. A. Dietr. against three mosquito vectors

2020 ◽  
Vol 19 (6) ◽  
pp. 569-579 ◽  
Author(s):  
Le T Huong ◽  
◽  
Trinh T Huong ◽  
Nguyen TT Huong ◽  
Nguyen H Hung ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Aedes Aegypti ◽  
Essential Oils ◽  
Larvicidal Activity ◽  
Aedes Albopictus ◽  
Culex Quinquefasciatus ◽  
Mosquito Vectors ◽  
Leaf Oil ◽  
Significant Mortality

The chemical composition and larvicidal activity of essential oils derived from the leaves and rhizomes of Zingiber montanum (J. Koenig) Link ex. A. Dietr. were reported. The main compounds in the leaf oil were -pinene (13.8%), -phellandrene (11.3%) and -pinene (7.3%) while the rhizome oil was dominated by sabinene (41.1%), terpinen-4-ol (22.7%) and (E)-nerolidol (14.3%). The minimum lethal concentration (larvicidal activity) LC50 of the rhizome oil at 24 h against Aedes albopictus was 35.17 μg/mL, while LC50 values of 32.20 μg/mL and 31.12 μg/mL were obtained against Aedes aegypti and Culex quinquefasciatus respectively. At 48 h the oil displayed larvicidal action with LC50 values of 23.18 μg/mL, 25.58 μg/mL and 18.99 μg/mL respectively towards Ae. albopictus, Ae. Aegypti and Cx. quinquefasciatus. The leaf oil did not exhibit significant mortality and larvicidal action. The results indicate the potential of rhizome essential oil of Z. montanum as a source of larvicidal agent.

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