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Aedes aegypti (Diptera: Culicidae) mosquito is an important vector of many disease-causing pathogens. An effective way to escape from these mosquito-borne diseases is to prevent mosquito bites. In the current study, essential oils of Lepidium pinnatifidum, Mentha longifolia, Origanum vulgare, and Agrimonia eupatoria were evaluated for their repellent potential against Ae. aegypti females. Essential oils were extracted using steam distillation from freshly collected aerial parts of the plants and tested against 4-5 day old females of Ae. aegypti through the human bait technique for repellency and repellent longevity assays. The chemical composition of extracted essential oils was explored by gas chromatography coupled with mass spectrometry (GC-MS). The essential oils of L. pinnatifidum, M. longifolia, O. vulgare, and A. eupatoria at a dose of 33 μg/cm 2 showed 100%, 94%, 87%, and 83% mosquito repellent activity, respectively. Furthermore, M. longifolia and O. vulgare essential oils exhibited 100% repellency at a dose of 165 μg/cm 2 , whereas A. eupatoria essential oil showed 100% repellency only at 330 μg/cm 2 . In the time-span bioassay, M. longifolia and O. vulgare essential oils showed protection against Ae. aegypti bites for 90 and 75 min, respectively whereas both A. eupatoria and L. pinnatifidum were found active for 45 min. Phenylacetonitrile (94%), piperitone oxide (34%), carvacrol (20%) and α-pinene (62%) were the most abundant compounds in L. pinnatifidum, M. longifolia, O. vulgare and A. eupatoria essential oils, respectively. The current study demonstrates that M. longifolia and O. vulgare essential oils possess the potential to be used as an alternative to synthetic chemicals to protect humans from mosquito bites.

Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Titel:	Essential oils of four wild plants inhibit the blood seeking behaviour of female Aedes aegytpi.
Autor/in / Beteiligte Person:	Iqbal, S ; Khan, FA ; Haris, A ; Mozūratis, R ; Binyameen, M ; Azeem, M
Zeitschrift:	Experimental parasitology, Jg. 244 (2023), S. 108424
Veröffentlichung:	Orlando, FL : Academic Press ; <i>Original Publication</i>: New York., 2023
Medientyp:	academicJournal
ISSN:	1090-2449 (electronic)
DOI:	10.1016/j.exppara.2022.108424
Schlagwort:	Animals Female Humans Mosquito Vectors Larva Oils, Volatile pharmacology Aedes Insect Bites and Stings Insect Repellents chemistry Insect Repellents pharmacology Insecticides pharmacology
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article Language: English [Exp Parasitol] 2023 Jan; Vol. 244, pp. 108424. <i>Date of Electronic Publication: </i>2022 Nov 12. MeSH Terms: Oils, Volatile* / pharmacology ; Aedes* ; Insect Bites and Stings* ; Insect Repellents* / chemistry ; Insect Repellents* / pharmacology ; Insecticides* / pharmacology ; Animals ; Female ; Humans ; Mosquito Vectors ; Larva Contributed Indexing: Keywords: Agrimonia eupatoria; Dengue; Eco friendly; Lepidium pinnatifidum; Mentha longifolia; Mosquito repellent Substance Nomenclature: 0 (Oils, Volatile) ; 0 (Insect Repellents) ; 0 (Insecticides) Entry Date(s): Date Created: 20221114 Date Completed: 20221221 Latest Revision: 20221222 Update Code: 20231215

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Essential oils of four wild plants inhibit the blood seeking behaviour of female Aedes aegytpi.