Article

Chemical composition, oviposition deterrent and larvicidal activities against Aedes aegypti of essential oils from Piper marginatum Jacq. (Piperaceae).

Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, PE, Brazil.
Bioresource technology (impact factor: 4.25). 01/2009; 100(7):2284-8. DOI:10.1016/j.biortech.2008.10.055
Source: PubMed

ABSTRACT The essential oils of leaves, stems and inflorescences of Piper marginatum, harvested in the Atlantic forest in the State of Pernambuco, Brazil, were obtained by hydrodistillation. GC and GC-MS analyses revealed the presence of 40 components accounting, respectively, for 99.6%, 99.7% and 99.1% of the leaf, stem and inflorescence oil, the most abundant being (Z)- or (E)-asarone and patchouli alcohol. The essential oil of the inflorescences exhibited potent activity against the 4th instar of Aedes aegypti with LC(10) and LC(50) values of 13.8 and 20.0 ppm, respectively. Furthermore, the inflorescence oil did not interfere in the oviposition of A. aegypti females when assayed at 50 ppm. These properties suggest that P. marginatum oil is a potential source of valuable larvicidal compounds for direct use or in conjunction with baits in traps constructed to capture eggs and larvae.

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Keywords

4th instar
 
A. aegypti females
 
Aedes aegypti
 
assayed
 
Atlantic forest
 
baits
 
capture eggs
 
direct use
 
essential oil
 
essential oils
 
GC-MS analyses
 
hydrodistillation
 
inflorescences
 
inflorescences exhibited potent activity
 
larvae
 
P. marginatum oil
 
Pernambuco
 
potential source
 
traps
 

E S Autran