Evaluation of Tribulus terrestris Linn (Zygophyllaceae) Acetone extract for Larvicidal and Repellence Activity against Mosquito Vectors.
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Date
2008-12
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Abstract
Acetone extracts of leaves and seeds from the Tribulus terrestris
(Zygophyllaceae) were tested against mature and immature different
mosquito vectors under laboratory condition. The extract showed strong
larvicidal, properties 100 per cent mortality in the 3rd-instar larvae was
observed in the bioassays with An. culicifacies Giles species A, An. stephensi
Liston , Culex quinquefasciatus Say and Aedes aegypti Linn ,against 200ppm
of the leaf acetone extract and 100 ppm seed acetone extract. The LC values 50
of leaf acetone extract estimated for 3rd-instars An. culicifacies species A, An.
stephensi, Cx. quinquefasciatus and Ae. aegypti after 24 hour of exposure
were 117, 124, 168 and 185 ppm respectively. The LC values of seed 50
acetone extract estimated for 3rd-instars An. culicifacies species A, An.
stephensi, Cx. quinquefasciatus and Ae. aegypti after 24 hour of exposure
were 100, 72, 91 and 91 ppm respectively. It is confirmed from the LC values 50
that the seed acetone extract of T. terrestris is more effective compared to leaf
extracts. A significant (P<0.004) higher concentration of acetone extract leaf
was required to kill equal number of larvae i.e. against acetone extract of
seed. The seed acetone extract showed strong repellent activity against
adults mosquitoes. Per cent protection obtained against Anopheles
culicifacies species A 100% repellency in 1h, 6h; Anopheles stephensi 100%
repellency in 0h, 4h, 6h; and Culex quinquefasciatus 100% repellency in 0h,
2h, 4h, at 10% concentration respectively. Against Deet- 2.5% An. culicifacies
Giles species A has shown 100% repellency in 1h,2h,6h , An. stephensi
Liston 99% repellency in 4h , and Culex quinquefasciatus Say has shown
100% repellency in 1h,2h.
Description
Keywords
Malaria vector, Tribulus terrestris, Larvicidal, Repellency, DEET
Citation
Singh S P, Raghavendra K, Singh R K, Mohanty S S, Dash A P. Evaluation of Tribulus terrestris Linn (Zygophyllaceae) Acetone extract for Larvicidal and Repellence Activity against Mosquito Vectors. Journal of Communicable Diseases. 2008 Dec; 40(4): 255-261.