LARVICIDAL ACTIVITIES OF PETROLEUM ETHER EXTRACTS OF DIFFERENT FRUIT PEEL WASTES AGAINST AN INDIAN STRAIN OF FILARIAL VECTOR, CULEX QUINQUEFASCIATUS SAY (DIPTERA: CULICIDAE)
Shrankhla and Sarita Kumar*
ABSTRACT
Objective: The larvicidal activity of the petroleum ether extracts of different fruit peels was assessed against the
early fourth instar of Culex quinquefasciatus (Cx. quinquefasciatus). Methods: Petroleum ether extracts of peels
of six common fruits were prepared and evaluated against early fourth instar larvae of Cx. quinquefasciatus using
WHO standard procedure. The results were statistically analyzed to explore the most efficient extract. Results:
Out of the six extracts, the Citrus sinensis and Mangifera indica peel extracts were found the most effective. Other
tested fruit peel extracts resulted in 10-80% larval mortality after 24 to 48 hours of exposure. The larvicidal
bioassays with C. sinensis resulted in LC50 and LC90 values were 31.345 ppm and 75.313 ppm, respectively as
compared to high LC50 and LC 90 values of 195.97 ppm and 633.05 ppm obtained with M. indica. Conclusions:
The petroleum ether extract of C. sinensis peels was found as the most effective extract against early fourth instar
of Cx. quinquefasciatus amongst the other tested fruit peel extracts. Further investigations are needed to identify
the bioactive component and formulate control strategies.
Keywords: Citrus sinensis, Culex quinquefasciatus, Fruit peels, Larvicidal potential, Mangifera indica.
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