Haz Inam, Hamayun Rashid Rathor, Hazrat Bilal, Soaib Ali Hassan And Imtinan Akram Khan, T Anwar Faridi T Allat L.
Bioactivity of botanicals against Aedes aegypti linnaeus and Anopheles stephensi liston larvae.
Pak J Public Health Jan ;3(2):23-7.

Background: Globally plants have been reported to contain certain compounds which have insecticidal properties, especially on the larval stages of mosquitoes. Method: Some of the locally grown plants such as Olea vera (Olive), Linum usitatissimum (Linseed), Piper nigrum (Black pepper), Syzygium aromaticum (Clove) and Calotropis procera (Aak), were selected and evaluated for their larvicidal activity against dengue vector Aedes aegypti and malaria vector Anopheles stephensi mosquitoes in Pakistan. The extracts were evaluated according to WHO guidelines for larvae of mosquitoes. Results: Among the ve plant extracts, linseed had the lowest LC50(2.32%) after 24 hours of exposure while after 48 hours it had 2.32 % LC50 value against Aedes aegypti. Again linseed had the lowest LC50 value (1.1 % and 0.07 %) after 24 hours and 48 hours of exposure against Anopheles stephensi. In terms of % age mortality when population was exposed to series of concentrations (2%-10%), linseed gave high % mortality against both the tested mosquitoes' species larvae. Conclusion: The result revealed that all the 5 plant species have some larvicidal effect but linseed had great potential against both tested mosquito species. Further small scale eld trials with the extracts of the most promising ones (linseed) shall be conducted to determine operational feasibility.

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