 BackResearch Article ScienceAsia 16 (1990): 133-139 |doi: 10.2306/scienceasia1513-1874.1990.16.133
PHYTOCHEMICAL TOXICITY OF THE CRUDE EXTRACT FROM DERRIS ELLIPTICA BENTHAM ON MOSQUITO LARVAE
PAIROTE PREMPREEa AND NOUWARATN SUKHAPANTHbABSTRACT: A crude extract From the roots, leaves and creeping branches of Derris elliptica Bentham (Papilioneae), and indigenous plant, kills mosquito larvae under laboratory conditions. Experiments were performed on second instar larvae of Aedes egypti Linnaeus, Anopheles (cellia) minimus Theobalct and Culex quinquefasciatus Say. The mortality rate was determined after exposure of larvae to various concentrations of crude extract at time intervals ranging From 1 to 96 hours. The results. indicated that the extract from this plant had toxic effects on the development of larvae, and interfered with the formation of the cuticle and internal tissues, leading finally to total mortality. Further investigations of the active chemical constituents as well as field trials are planned. a Department of Chemistry and b Department of Biology, Faculty of Science, Mahidol University, Bangkok, Thailand. Received 10 July 1990
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