INVESTIGADORES
MASUH Hector Mario
congresos y reuniones científicas
Título:
Sensitivity of Aedes aegypti adults (Diptera: Culicidae) to the vapours of Eucalyptus essential oils and their main components
Autor/es:
ALEJANDRO LUCIA; SUSANA LICASTRO; EDUARDO ZERBA; HÉCTOR MASUH
Lugar:
New Orleans, USA
Reunión:
Congreso; 75th annual meeting American Mosquito Control Association and 19th latin American Symposium; 2009
Institución organizadora:
American Mosquito Control Association
Resumen:
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Vapours of essential
oils extracted from various species of Eucalyptus
(E. gunnii, E. tereticornis, E. grandis,
E. camaldulensis, E. dunnii, E. cinerea, E. saligna, E. sideroxylon, E.
globulus ssp globulus, E. globulus ssp maidenii, E. viminalis and the hybrids
E. grandis x E. tereticornis and E. grandis x E. camaldulensis) and their
major components were found to be toxic to Aedes
aegypti (L.) adults, the yellow fever mosquito.
A 10 ml
aliquot of each oil was placed in a cillindrical test chamber and the number of
knocked-down mosquitoes was recorded as function of time. Knock-down time 50%
was then calculated. Results showed that E. viminalis had a high knock-down
activity of 4.2 min, in the same order as Dichlorvos, a standard a knock-down
agent. A correlation was observed between the content of 1,8-cineole in the Eucalyptus essential oils and the
corresponding toxic effect. Regression analysis also showed a statistically
significant relationship between KT50 values and the inverse
function of vapour pressures (1/Vp) of the different essential oil
components.
the results of the present
study show that 1,8-cineole and Eucalyptus
essential oils with an elevated concentration of this monoterpene present a
high knock down activity against Aedes
aegypti. Therefore, these compounds are a promising alternative with a low
environmental impact for controlling the yellow fever mosquito.
