Potential of the Bush Mint, Hyptis suaveolens Essential Oil for Personal Protection Against Mosquito Biting

Abstract

We studied the potential of the essential oil extract from the bush mint, Hyptis suaveolens, for use against mosquito biting under both laboratory and field conditions. In the laboratory, the repellency of various concentrations (1-6%) of the essential oil was assessed against Anopheles gambiae, based on a 15-min landing and biting on treated forearms of volunteers. In the laboratory, the percentage of mosquitoes landing on the forearm was 42, 33, 23, 23, 9, and 2 for 1%, 2%, 3%, 4%, 5%, and 6% essential oil concentration, respectively; and 92 and 91 for the solvent (isopropanol) and untreated control, respectively. The percentage of mosquitoes taking a blood meal was 22, 12, 13, 12, 5, and 3 for 1%, 2%, 3%, 4%, 5%, and 6% essential oil, respectively; and 52 and 51 for the solvent and control, respectively. In the field, the 6% essential oil repelled all mosquitoes immediately postapplication; this activity declined to 75% after 5 h. The repellent action of the 8% essential oil concentration was higher, 97% after 5 h. Based on these data, the essential oil of H. suaveolens appears to be a good candidate for use in the integrated management of mosquito vectors of disease.

Essential Oil from Bush Mint, Hyptis suaveolens, is as Effective as DEET for Personal Protection against Mosquito Bites

“…When tested in field conditions, this concentration repelled 100% of mosquitoes present in the test areas the first 15 minutes postapplication [11]. In the present study, 10% H. suaveolens essential oil induced also the maximal repellency rate.…”

“…Comparative study conducted on the efficacy of insect repellents against mosquito bites demonstrated that higher concentrations of DEET provided longerlasting protection [13]. As for DEET, higher concentration of H. suaveolens essential oil provided also longer-lasting protection [11]. In the present study, 10% H. suaveolens essential oil and a formulation containing 30% DEET provided similar protection time amounting to at least 5 hours.…”

“…Laboratory study has assessed the repellency rates of various concentrations of H. suaveolens essential oil and 6% of the oil was said to induce a high repellency rate in laboratory conditions [10]. Recent field works conducted with H. suaveolens essential oil showed that the effects of a solution containing 8% of the oil persisted and repelled up to 97.56% of mosquitoes by 5 hours post-application [11]. Here we report results of a comparative study carried out in field conditions on 10% H. suaveolens essential oil and N,Ndiethyl-3-methylbenzamide (DEET).…”

Chemical Compostions of Essential Oils and Antimicrobial Activity of Hyptis suaveolens (L.) Poit. (Lamiaceae) from Vietnam

“…The MIC range of between 0.5 mL/mm and 0.125 mL/mm were reported for essential oil H. suaveolens [23]. Essential oils of H. suaveolens showed mortality towards Trypanasoma congoles [13], Tenebroides mauritanicus (L.) [19], Sitophilus granaries [20], Callosobruchus maculatus [23] and Anopheles gambiae [27]. The antioxidant and antimicrobial activities of essential oil from H. suaveolens have been reported [28].…”

ISOLAMENTO, IDENTIFICAÇÃO E AVALIAÇÃO DAS ATIVIDADES ENZIMÁTICA E ANTIBACTERIANA DE MICRO-ORGANISMOS ENDOFÍTICOS DE Hyptis suaveolens (L.) Poit.

“…Essa erva é empregada na medicina popular no tratamento de infecções respiratórias e gastrointestinais, indigestão, resfriados, dores, espasmos, doenças dermatológicas e em úlceras gástricas e em condições envolvendo exacerbação inflamatória (MARTINS & POLO, 2009;JESUS et al, 2013;PADALIA et al, 2015). Extratos e óleos essenciais derivados dessa planta exibem uma ampla gama de atividades biológicas, com destaque a antioxidante, anti-inflamatória, antimicrobiana, anti-helmíntica e até mesmo uma ótima ação repelente a mosquitos (ABAGLI et al, 2012;NGOZI et al, 2014). Recentemente, vários compostos ativos de Hyptis suaveolens (L.) Poit.…”