Evaluation of larvicidal potential of kinnow peel extracts against Aedes aegypti Linnaeus
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Date
2021
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Punjab Agricultural University, Ludhiana
Abstract
Transmission of dengue virus by Ae. aegypti mosquito is one of the major global issues.
Presently plant based products are in high demand for mosquito control, as they are effective,
easily available and eco-friendly. Different types of extracts viz. oil, ethanolic and aqueous
were prepared from kinnow peel and tested @ 40, 50, 60, 70 and 80ppm, 0.05, 0.10, 0.15,
0.20 and 0.25% and 6.0, 7.0, 8.0, 9.0 and 10.0% respectively for their larvicidal efficacy
against Ae. aegypti 4th instar larvae. Results indicated 70ppm of oil, 0.20% of ethanolic and
9.0% of aqueous extracts as effective larvicidal concentrations. Certain morphological
damages and abnormal behavioural activities were observed in the treated larvae. These
kinnow peel extracts were found to be highly volatile in nature, as no residual activity in
terms of larval mortality occurred in the left over effective concentrations of these extracts.
However, residual effect in the form of delayed development (L4 to adult) was observed in all
the treated sets in comparison to control and vehicle-control. All kinnow peel extracts were
found to have statistically similar larvicidal potential in freshly prepared and stored (2, 4 and
6 months old) extracts, indicating no effect of storage on their larvicidal activity. Thus, the
identification of kinnow like plant based oil/extracts having larvicidal properties combined
with capacity to damage larvae, alter their behaviour along with delay in developmental
phases is the need of hour and should be exploited in future for managing the problem of
dengue transmitting vector, Ae. aegypti.
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Arshkamaljot Kaur (2021). Evaluation of larvicidal potential of kinnow peel extracts against Aedes aegypti Linnaeus (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.