Efficacy of Botanical Extracts from Tagetus erecta and Cymbopogon citratus Against the Yellow Fever Mosquito, Aedes aegypti

摘要

The plant extract of Tagetus erecta and Cymbopogon citratus were evaluated for ovicidal and repellent activities against Aedes aegypti. The egg hatchability was observed after 24 hour exposure. 100% ovicidal activity was observed at 5.5% and 3.0% respectively. Skin repellent test at 0.25,0.5,0.75 and 1.0 mg/cm~2 concentration gave 100% protection upto 4.0,4.5,5.0,5.5 and 6.0 hrs respectively. From the present study it was revealed that extracts from Tagetus erecta and Cymbpogon erecta can be effectively used in the control of Aedes aegypti.