The plant extracts were dissolved in 10毺l of DMSO for
its solubility in water. Larvicidal activity was determined
according to WHO protocol [10]. The larvae were treated
with the plant extracts of 1000毺g/ml concentration . A
corresponding control was maintained. The larval mortality
of fourth instar of A. aegypti was observed. The number of
larvae surviving at the end of 24 and 48 hours were recorded
and the percent mortality was calculated.