Eradication of Ae.aegypti can be done on its larvae using chemical, biological and physical methods, one of which is larvicide. Early detection of vector resistance to insecticides can be useful in determining the right insecticide to control vectors. People generally use insecticides from the synthetic pyrethroid group which are widely sold on the market in an effort to kill mosquitoes. This results in the resistance of the Aedes aegepty mosquito vector to synthetic insecticides, to prevent If resistance occurs, it needs to be treated with natural insecticides that come from plants, one of which is star fruit. The starfruit plant (Averrhoa bilimbi L.) The secondary compounds produced are alkaloids, saponins and flavonoids. Bioactive compounds found in plants can be used like synthetic insecticides. The aim of this research isto knowAedes aegepty larvicide resistance to starfruit leaf extract (Averrhoa bilimbi L.) as a natural larvicide.Type of pure experimental research (true experiment) with a "One Groups Pretest Posttest Design" design, with a Completely Randomized Design (RAL).The research was conducted in July 2024. Samples of starfruit plants in Aceh Besar, samples of larvae from maintenance mosquitoes. The concentrations used were 800,900 and 1000 ppm with controls. Treat 4 repetitions, analysis of differences using anova test and resistance test. Research resultThe number of mosquito larvae that died was 32 at a concentration of 800 ppm to 98 at a concentration of 1000 ppm. The LC95 obtained is 5.007%. at a dose of 1000 ppm is included in the vulnerable category. Because mortality reaches 98%. Meanwhile, other doses are resistant with mortality below 95%. QThere was a significant difference in the average mortality of Aedes aegypti larvae from various dose variations.Natural Insecticide Starfruit leaves (Averrhoa Bilimbi Linn). So further LSD testing was carried out to determine the most effective dose.