larvicidal efficacies and chemical composition of essential oils of pinus sylvestris and syzygium aromaticum against mosquitoes
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ID: 234933
2014
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Abstract
Objective: To assess the chemical composition and mosquito larvicidal potentials of essential oils of locally sourced Pinus sylvestris (P. sylvestris) and Syzygium aromaticum (S. aromaticum) against Aedes aegypti (A. aegypti) and Culex quinquefasciatus (C. quinquefasciatus).
Methods: The chemical composition of the essential oils of both plants was determined using GC-MS while the larvicidal bioassay was carried out using different concentrations of the oils against the larvae of A. aegypti and C. quinquefasciatus in accordance with the standard protocol.
Results: The results as determined by GC-MS showed that oil of S. aromaticum has eugenol (80.5%) as its principal constituent while P. sylvestris has 3-Cyclohexene-1-methanol, .alpha., .alpha.4-trimethyl (27.1%) as its dominant constituent. Both oils achieved over 85% larval mortality within 24 h. The larvae of A. aegypti were more susceptible to the oils [LC50 (S. aromaticum)=92.56 mg/L, LC50(P. sylvestris)=100.39 mg/L] than C. quinquefasciatus [LC50(S. aromaticum)=124.42 mg/L; LC50(P. sylvestris)=128.00 mg/L]. S. aromaticum oil was more toxic to the mosquito larvae than oil of P. sylvestris but the difference in lethal concentrations was insignificant (P>0.05).
Conclusion: The results justify the larvicidal potentials of both essential oils and the need to incorporate them in vector management and control.
| Reference Key |
fayemiwo2014asianlarvicidal
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|---|---|
| Authors | ;Kehinde Adenike Fayemiwo;Monsuru Adebayo Adeleke;Ovie Princewill Okoro;Shola Hezekiah Awojide;Ilias Olufemi Awoniyi |
| Journal | Organic letters |
| Year | 2014 |
| DOI |
10.1016/S2221-1691(14)60204-5
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| URL | |
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