Repellency of Essential Oil of Piper aduncum Against Aedes albopictus in the Laboratory

Abstract

The repellent activity of Piper aduncum essential oil against Aedes albopictus was investigated under laboratory conditions with human volunteers. The lowest median effective dose (ED50) value was 1.5 microg/cm2 at 60 sec of exposure when compared to 90 sec (2.1 microg/cm2) and 120 sec (1.8 microg/cm2) of exposure. At 0.4 g, the essential oil gave a high protection (95.2%) against Ae. albopictus bites or landing at 2 h postapplication. The percentage of protection was reduced to 83.3% after 4 h, 64.5% after 6 h, and 51.6% after 8 h postapplication. As a comparison, treatment with 10% deet gave 100% protection against mosquito biting/landing for 4 h postapplication. There was no significant difference in percentage protection reduction between the plant extract and the commercial product deet, respectively (P = 0.739). The essential oil, which was not as good as deet, still gave moderate protection against Ae. albopictus biting even until 4 h postapplication. In conclusion, the P. aduncum essential oil has the potential to be used as a repellent against the dengue/dengue hemorrhagic fever vector, Ae. albopictus.

Coexistence of Aedes aegypti and Aedes albopictus in Jinghong City, Yunnan Province: A Survey of Aedes aegypti Invasion

“…aegypti has decreased from high prevalence in 1907 to relict populations in remote valleys today in Mayotte. It was [16] reported that in certain human dwellings/habitats, Ae. albopictus were ovipositing inside the premises and was predominant in population compared to Ae.…”

Plant-based insect repellents: a review of their efficacy, development and testing

“…These studies can be broken down into a series of categories: 1) standard ethnobotanical studies and evaluations of plants that are traditionally used to repel mosquitoes [17,67-70]; 2) standard dose response [33] laboratory evaluations of solvent extractions of plants without DEET positive controls [71]; 3) standard dose response [33] laboratory evaluations of solvent or extractions or essential oils of plants with DEET positive controls [72] coupled with GC-MS (coupled gas chromatography-mass spectrometry) [73]; 4) laboratory evaluations using time to first bite method [74] comparing the plant repellents to DEET [75] and in addition several of those studies also analysed the constituents of the oil through GC-MS [76,77]. In addition there were a large number of studies that did not use the accepted standard methodology [78] (Table 3), and should be interpreted with caution.…”

Biolarvacidal Potential of Ipomoea Cairica Extracts Against Key Dengue Vectors

“…For the effect against Ae. albopictus, the lowest median effective dose (ED 50 ) value was 2.1 ug/cm2 at 90 seconds of exposure (Misni et al 2009). Furthermore, field evaluation by ultra-low-volume (ULV) spray against dengue vector using Litsea elliptica extracts and bifenthrin indicated low larvacidal effect but the extract caused 96.5 -97.6% mortality among Ae.…”