Chemical composition and assessment of larvicidal and repellent capacity of 14 Lamiaceae essential oils against Aedes albopictus

Abstract

In the current laboratory study, 14 essential oils (EOs) derived from 12 Lamiaceae plant species and their major components were screened for their larvicidal and repellent properties against Aedes albopictus, an invasive mosquito species of great medical importance. The results of toxicity bioassays revealed that the EOs from Thymus vulgaris, Ocimum basilicum, Origanum dictamnus, Origanum majorana, and Origanum vulgare, as well as their major components (terpenes), namely thymol, carvacrol, p-cymene, and γ-terpinene exerted the highest larvicidal effect. Essential oils from Mellisa officinalis, Origanum dictamus, Mentha spicata (chem. piperitenone epoxide), Origanum majorana, and Satureja thymbra were the most potent repellents, with the last two assigned as the best ones. Among the terpenes tested, piperitenone epoxide, carvacrol, thymol, and piperitenone provided the highest level of protection against Ae. albopictus adults. Chemical analysis revealed the presence of a high number of terpenes in the EOs, while in most cases, the biological action of the tested EOs and their major components was in consistency. The most effective EOs and terpenes that were identified through the current laboratory bioassays could be used as alternative agents to control larvae and repel adults of Ae. albopictus.

Microencapsulation of eucalyptol in polyethylene glycol and polycaprolactone using particles from gas-saturated solutions

“…It is a monoterpene cyclic ether (1,3,3trimethyl-2-oxabicyclo[2.2.2]octane), also commonly referred to as 1,8-cineole and can be found in appreciable quantities in other aromatic plants belonging to the family Myrtaceae and Lamiaceae. 1,2 Eucalyptol is generally recognized as safe and approved for use as a avourant, fragrance or additive in foods, cosmetics and drugs. 3 Traditionally, the use of eucalyptol in otorhinolaryngology for the treatment of upper respiratory diseases like asthma and sinusitis dates back to the 19 th century.…”

Reflexion on Bio-Sourced Mosquito Repellents: Nature, Activity, and Preparation

“…In this context, the chemical diversity of EOs composition should be an advantage (Pohlit et al, 2011). The repellent action against A. albopictus of 14 Lamiaceae-derived EOs and 24 of their terpenes was recently assessed (Giatropoulos et al, 2018). Origanum mantzuranum and Satureja thymbra (Lamiaceae) EOs had a high repellency against A. albopictus, due to their high content in carvacrol and thymol.…”

From Bio-Prospecting to Field Assessment: The Case of Carvacrol Rich Essential Oil as a Potent Mosquito Larvicidal and Repellent Agent

“…These results are in accordance with previous studies establishing the high level of protection exhibited by Carvacrol against Ae. Albopictus, in 5-fold-lower doses to DEET (Giatropoulos et al, 2018) and An. Gambiae (Kröber et al, 2018).…”