author(s)
Novyan Lusiyana, Nidyasari Citraningrum, Fitratul Aqidah and Hikmah Cahyati

abstract
Aedes aegyptiis a vectors transmitting any serious disease that cause morbidity and mortality in human. Insecticides not only failed to control of insect development but also led to development of mosquitoes resistance. Plant-derived products is being one way to resolve these problem. An insecticide does not need to cause high mortality on taget organisms but should be eco-friendly in nature. This study was conducted to test the efficacy of various extract of Leuchaena leucocephala against Ae. aegypti. The ethanol, methanol, and N hexane leaf of L. leucocephala were studied in the range of 0,125 to 1,5% in the laboratory bioassays against early 4^th instar larvae of Ae. aegypti. The mortality data were analyze with probit to determine the lethal concentration (LC₅₀ and LC₉₀) to kill 50 and 90 percent of treated larvae. The highest larval mortality was found in N hexane leaf extracts with LC₅₀ values was 0,305%; leaf ethanol and methanol extracts with LC₅₀ values of 1,074 and 1,025%. N hexane extract outstand as highly active larvicide, achieving 91% larval mortality in 24 mortality hours according to the WHO protocol. These results suggest that the effective plant crude extracts of N hexane have the potential to be used as an ideal ecofriendly approach for the control of the Ae. aegypti.