Mani Saranya, Ramanathapuram Sundaram Mohanraj and Balasubramaniam Dhanakkodi
In the persent study , aqueous leaf extract of Spathodea campanulata were investigated for larvicidal, pupicidal activities and morphological deformities against Aedes aegypti . LC10, LC50 and LC90/24 ,48, 72, 96 hours values of aqueous leaf extract of S. campanulata to 1 instar larvae was 1.42, 4.0 and 5.40 %( 24 hours), 0.47, 0.96 and 2.12 % (48 hours) , 0.28, 1.14 and 1.84 % (72 hours) and 0.14, 0.59 and 1.12 % ( 96 hours) and this was found to gradully increase with the age of larvae. Pupae showed the highest resistance to the aqueous leaf extract of S. campanulata. Moreover, wide range of morphological deformities was observed and recorded in different categories.The study is of great importance in formulation of an effective vector control strategy based on enviromental friendly alternative (plant origin) insecticides.
