Electronic Theses and Dissertation

Daun katang-katang (Ipomoea pes-caprae) adalah bagian dari tanaman merambat yang tumbuh di wilayah pesisir, terutama di atas pasir pantai. Tanaman ini memiliki bunga berwarna ungu yang hanya mekar di pagi hari, dan daunnya berbentuk seperti telapak kaki kuda. Secara ilmiah, tanaman ini termasuk dalam famili Convolvulaceae, genus Ipomoea. Penelitian ini bertujuan untuk mengidentifikasi senyawa metabolit sekunder dan uji aktivitas larvasida ekstrak metanol daun katang-katang Ipomea pes-caprae. Penelitian dilaksanakan pada bulan Februari hingga Juni 2025 di Laboratorium Kimia Laut, Fakultas Kelautan dan Perikanan, Universitas Syiah Kuala. Daun katang-katang diekstraksi menggunakan metode maserasi dengan pelarut metanol. Uji fitokimia dilakukan untuk mengetahui kandungan senyawa metabolit sekunder, sementara uji aktivitas larvasida dilakukan dengan menggunakan larva Aedes aegypti instar III dengan perbandingan konsentrasi 1000 ppm, 500 ppm, 250 ppm, 125 ppm 50 ppm, dan 25 ppm. Pengamatan dilakukan selama 24 jam dan data dianalisis menggunakan metode probit untuk memperoleh nilai LC₅₀. Hasil uji fitokimia menunjukkan bahwa ekstrak mengandung lima jenis metabolit sekunder, yaitu alkaloid, flavonoid, triterpenoid, saponin, dan tanin. Hasil uji larvasida menunjukkan bahwa tingkat kematian larva meningkat seiring dengan kenaikan konsentrasi ekstrak. Berdasarkan analisis regresi linier dan perhitungan probit, diperoleh nilai LC₅₀ sebesar 571,412 ppm yang termasuk dalam kategori toksik.
Kata kunci: Katang-katang Ipomea pes-caprae, metabolit sekunder, larvasida, Aedes aegypti, LC50.

Katang-katang leaves (Ipomoea pes-caprae) are part of a creeping plant that grows in coastal areas, especially on beach sand.This plant has purple flowers that only bloom in the morning, and its leaves are shaped like horse hooves. Scientifically, this plant belongs to the Convolvulaceae family, genus Ipomoea. This study aims to identify secondary metabolites and test the larvicidal activity of methanol extracts from katang-katang leaves (Ipomoea pes-caprae). The research was conducted from February to June 2025 at the Marine Chemistry Laboratory, Faculty of Marine Sciences and Fisheries, Syiah Kuala University. Katang-katang leaves were extracted using the maceration with methanol as the solvent. Phytochemical tests were conducted to determine the content of secondary metabolites, while larvicidal activity tests were performed using Aedes aegypti larvae at the third instar stage with concentration ratios of 1000 ppm, 500 ppm, 250 ppm, 125 ppm, 50 ppm, and 25 ppm. Observations were conducted over 24 hours, and data were analyzed using the probit method to determine the LC₅₀ value. The phytochemical test results indicated that the extract contained five types of secondary metabolites, namely alkaloids, flavonoids, triterpenoids, saponins, and tannins. The larvicidal showed that larval mortality increased with increasing extract concentration. Based on linear regression analysis and probit calculations, the LC₅₀ value was determined to be 571.412 ppm which falls within the toxic category. Keywords: Katang-katang Ipomea pes-caprae, secondary metabolites, larvicide, Aedes aegypti, LC50.