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VOL. 6, ISSUE 4 (2021)
Assessment of larvicidal properties of bio-pesticide (Cymbopogon citratus) plant extracts against culex mosquitoes larva
Authors
P Muthukumar, Suvarna V P, Poovizhi K V
Abstract
Objective: Assessment of larvicidal properties of Cymbopogon citratus (Lemon grass or Malabar grass or Cochin grass) plant extracts against Culex mosquitoes at PG and Research Department of Zoology, Arulmigu Palaniandavar College of Arts and Culture, Palani. Methods: The III and IV instars of Culex larvicidal activity of Malabar grass extracts was tested the protocol recommended by WHO. Methanol and water extracts were prepared at 50, 100, 150, and 200 mg/L concentrations and tested against III and IV instars larvae of Culex mosquitoes. The mortality rate of mosquito larvae’s was recorded after 24, 48 and 72 h exposure period continuously. Results: III instar larvae after 24 h exposure period, maximum mortality of 84.60% was recorded at 200 mg/L concentration of methanol extract. After 48h exposure period, maximum mortality of 90.20% and 72 h exposure period, maximum mortality of 94.20% was recorded in methonal extract in all the tested concentration. The maximum mortality of fourth instar larvae was 89.30% and 92.20% in methanol extract at 150 and 200 mg/L concentrations respectively. The percentage of mortality in III and IV instars of mosquitoes was higher in methanol extract followed by water extract. Conclusions: The mortality percentage of different concentration of the metnanol and water extracts tested and exposure period. This experiments confirmed larvicidal activity of Cymbopogon citratus leaf extracts against Culex mosquitoes. This leaf extract can be used by applying on drainage water treatment plant containing tanks or culex breeding places to prevent adult emergence.
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Pages:197-201
How to cite this article:
P Muthukumar, Suvarna V P, Poovizhi K V "Assessment of larvicidal properties of bio-pesticide (C<em>ymbopogon citratus) </em>plant extracts against <em>culex</em> mosquitoes larva ". International Journal of Entomology Research, Vol 6, Issue 4, 2021, Pages 197-201
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