Lead tree (Leucaena glauca, Benth) leaves contain saponins that can be used as
larvicides. The aim of this study was to determine the effectiveness of etanol ekstract
of lead tree (Leucaena glauca, Benth) leaves as a natural larvicides against the
mortality of the third instar larvae of Aedes aegypti. This research was an
experimental research with posttest only control group design where the objects
were divided into two groups: control group and treatment group. The samples were
25 larvae on each group, and it’s repeated four times. So the total of samples were
700 Aedes aegypti larvae. The results showed that at concentration of 0% (control)
etanol extract of lead tree leave could kill 0 larvae of Aedes aegypti, concentration
of 4% could kill 7 larvae (28%), concentration of 6% could kill 18 larvae (72%),
concentration of 8% could kill 21 larvae (84 %), concentration of 10% could kill 25 larvae (100%), concentration of 12% could kill 25 larvae (100%), and
concentration of 14% could kill 25 larvae (100%). Based on Kruskall Wallis test analysis, it can be concluded that there was an effect of ethanol extract of lead tree (Leucaena glauca, Benth) leaves as a natural larvicides against the mortality of the third instar larvae of Aedes aegypti with a significant value of p = 0.000 (p <0.01). Ethanol extract of lead tree (Leucaena glauca, Benth) leaves at concentration of 10 % is the smallest concentration that was able to kill the third instar larvae of Aedes aegypti as much as 100 %
