Abstrato

Bauhinia Variegata L. and Croton Sparsiflorus L. Against the Larvae of Aedes Aegypti L.

Shanmugapriya R, Maheswaran R and Ignacimuthu S

The aim of the present study was to evaluate the larvicidal activity of plant powders of Bauhinia variegata and Croton sparsiflorus against the fourth instar larvae of Aedes aegypti. The macerated leaf powders of B. variegata and C. sparsiflorus were tested against the larvae of A. aegypti upto 24 hr exposure period with the concentrations of 100, 120, 140, 160, 180, and 200 mg/100 ml of tap water. The leaf powder of C. sparsiflorus had LC50 value of 122.73 mg/100 ml and LC90 value of 180.04 mg/100 ml followed by B. variegata with LC50 value of 142.47 mg/100 ml and LC90 value of 210.16 mg/100 ml respectively. The present investigation clearly demonstrates that C. sparsiflorus showed cent percent mortality followed by B. variegata against the larvae of A. aegypti. With further isolation and identification of bioactive molecules from B. variegata and C. sparsiflorus can be evaluated and developed novel biopesticide against mosquitoes as well as other insect pests.