Mosquitoes are the most important of insects in terms
of public health importance which transmit a number
of diseases such as dengue, chikungunya, Japanese
encephalitis, filariasis and malaria, causing millions
of deaths every year. Aedes aegypti (Ae. aegypti) and
Culex quinquefasciatus (Cx. quinquefasciatus) are major
urban vectors of dengue fever, dengue haemorrhagic
fever, chikungunya and Japanese encephalitis. Mosquito
bites may also cause allergic responses including
local skin reactions and systemic reactions such as
urticarial. Personal protection is one approach to prevent
mosquito bites[1-3]. Most common mosquito repellents
available contain N,N-diethyl-3-methylbenzamide or
also called DEET that has shown strong protection from
mosquitoes. However, it may exert toxic reaction under
some circumstances and age groups and damage plastic,
synthetic materials, thus the alternative new products
need to be explored[4-8].
Plant essential oils in general have been recognized as
important natural resources of insecticides because some
are selective, biodegrade to non-toxic products and have
few effects on non-target organisms and environment[9].
Many research insect repellents derived from plant
extract, such as Eucalyptus citriodara (E. citriodara),