Chemical compositions and larvicidal activities of leaf essential oils from two eucalyptus species.
In the current study, the mosquito larvicidal activity of leaf essential oils and their constituents from two eucalyptus species (Eucalyptus camaldulensis and Eucalyptus urophylla) against two mosquito species, Aedes aegypti and Aedes albopictus, was investigated. In addition, the chemical compositions of the leaf essential oils were analyzed using gas chromatography-mass spectrometry. Results from the larvicidal tests revealed that essential oil from the leaves of E. camaldulensis had an excellent inhibitory effect against both A. aegypti and A. albopictus larvae. The 12 pure constituents extracted from the two eucalyptus leaf essential oils were also tested individually against two mosquito larvae. Among the six effective constituents, alpha-terpinene exhibits the best larvicidal effect against both A. aegypti and A. albopictus larvae. Results of this study show that the leaf essential oil of E. camaldulensis and its effective constituents might be considered as a potent source for the production of fine natural larvicides.
Cheng
Sen-Sung
SS
Experimental Forest, National Taiwan University, Nan-Tou, Taiwan.
Huang
Chin-Gi
CG
Chen
Ying-Ju
YJ
Yu
Jane-Jane
JJ
Chen
Wei-June
WJ
Chang
Shang-Tzen
ST
D000818:Animals; D009033:Culicidae / Q000187:drug effects*; D005052:Eucalyptus / Q000145:classification* / Q000378:metabolism*; D007306:Insecticides / Q000008:administration & dosage* / Q000737:chemistry*; D007814:Larva / Q000187:drug effects; D009822:Oils, Volatile / Q000737:chemistry* / Q000494:pharmacology*; D010936:Plant Extracts / Q000008:administration & dosage / Q000737:chemistry; D018515:Plant Leaves / Q000145:classification / Q000378:metabolism*; D015996:Survival Rate
D007306:Insecticides; D009822:Oils, Volatile; D010936:Plant Extracts