Larvicidal, adulticidal and repellent activities against Aedes aegypti L. of two commonly used spices, Origanum vulgare L. and Thymus vulgaris L.

• DOI: 10.1016/j.sajb.2021.03.005
• Publication Date: 2021-04-08T21:56:42Z
• Authors: Aimêe A. de Oliveira; Leandro P. França; Aline de S. Ramos; José Luiz P. Ferr...; Ana Clara B. Maria; Kelson M.T Oliveira; Earle S.Araújo Jr; Jonathas N. da Silva; Adjane D.S. Branches; Gabriel de A. Barros; Noam G. da Silva; Wanderli P. Tadei; Ana Claudia F. Am...; Jefferson R. de A...
• Keywords: Origanum; Thymus vulgaris; Thymol; Mosquito control

• Origanum vulgare and Thymus vulgaris show significant adulticidal activity. Important repellent activity of essential oil. Morphological differences highlighted in the larvae treated with oils. Essential oil two spices can be used to control A. aegypti mosquitoes. The high incidence dengue, chikungunya, Zika indicates importance controlling vector these arboviruses tropical subtropical regions world. However, is hindered by pesticide resistance limited success biocontrol programs against Aedes Despite difficulties, study common plant species, including those commercial value, offer effective ecological tools fight In present study, oils obtained from aerial parts L. were analyzed GC–MS evaluated for their larvicidal, activities main constituents O. terpinen-4-ol (17.4%), carvacrol (16.0%) thymol (10.4%), T. (40.0%), p -cymene (19.3%) γ-terpinene (17.3%). Both toxic Ae. LC 50 values 37.5 μg/mL 38.9 . For adult mosquitoes, 14.3 11.7 μg/mL, respectively. showed a repellency effect, ranging 8.9% 37.8% 4.4% 68.9%, respectively addition, morphological between EOs group evidenced optical microscopy. Thus, results suggest that have potential use as an ecofriendly source develop new insecticides