Eucalyptus oil based hybrid nanoemulsions as larvicidal agents against Aedes aegypti (Linnaeus)
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The growing threat of vector-borne diseases and environmental pollution has prompted the
nanotechnology based investigations. The present study aimed to use one of the
nanotechnological applications with larvicidal potential against Aedes aegypti (Linnaeus) by
preparing aqueous hybrid nanoemulsions of zinc and copper sulfide nanoparticles with non
polar nanoemulsion of Eucalyptus globulosa oil by sonication. GC-MS analysis revealed
presence of total 22 compounds with major composition of 1, 8-cineole (42.16%) and Pcymene
(14.81%). 1:2 and 1:5 ratio of non polar oil emulsion and both nanohybrids were
found to be most stable after thermodynamic stability tests. TEM studies of non polar oil
nanoemulsion, CuS and ZnS based nanohybrids were found to have average size of 20-40, 80100
and 50-70 nm with spherical, globular and rectangular shapes respectively. The larvicidal
activity of prepared nanoformulations were tested at different concentrations (in triplicate) and
70, 6.5 and 9.5 ppm of oil nanoemuslion, CuS and ZnS based nanohybrids were found to be
the most effective concentrations as 100% mortality was observed within 24 hours. LC50 and
LC90 values were calculated to be 51.95 and 64.21 ppm, 5.00 and 5.81 ppm, 7.63 and 9.22
ppm for non polar oil nanoemulsions, CuS and ZnS based nanohybrids after 24 hrs
respectively. The toxicological data was assured by SEM, histological and biochemical
results. Under simulated conditions, nanohybrids treatment demonstrated optimum larvicidal
potency after 48 hrs of exposure. These nanohybrids did not show toxicity in Scapholebris
kingi and Mesocyclops spp. Thus, the following research is a step towards safe and efficient
approach against Aedes aegypti
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Citation
Komalpreet Kaur (2020) Eucalyptus oil based hybrid nanoemulsions as larvicidal agents against Aedes aegypti (Linnaeus) (Unpublished Ph.D. Dissertation). Punjab Agricultural University, Ludhiana, Punjab, India.