Two primary compounds from the sesquiterpene group contained in nutsedge's tuber, α-cyperone and nootkatone are related to its benefits as herbal medicine and natural pesticides. This research was conducted to analyze the content of α-cyperone and nootkatone at three different part of the tuber (whole-tuber, peeled-tuber, and tuber's peel) so that it indicates the level of activity from these parts of nutsedge tuber in the tropics. The ethanolic extracts were analyzed using high-performance liquid chromatography (HPLC) equipped with C18 column, acetonitrile and aquabidestillata (65:35) as a mobile phase and PDA detection at 254 nm. The analysis showed the results that the highest content of α-cyperone was on the whole-tuber 1.074%, followed by peeled-tuber 0.736% and tuber's peel 0.202%. Nootkatone was not found in this nutsedge's tuber.

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Shallot (Allium ascalonicum var. aggregatum) is one of the most important vegetables which has high economic value with high demand. The increasing of demand must be followed by the increasing of supply with shallot central production optimization at out of Java Island like North Sulawesi. Using the suitable variety with the local agro-ecosystem is the way to optimize shallot production. Lansuna is the new variety which obtained from mass selection of local shallots in North Sulawesi. The objective of this research is to identified the performance of Lansuna as the new variety compared with national commercial variety, Bima Brebes. The research is done through observation method in four village in West Tompaso subdistrict, Minahasa District, North Sulawesi Province. Results of this research showed that Lansuna obviously has better performance compared with Bima Brebes. Lansuna tuber weight per plant is 127.26 g higher than Bima Brebes 76.95 g. Lansuna has a round shape tuber with outer diameter at the center, color of dry tuber skin is N57B (vivid purplish red) and Bima Brebes has oval shape tuber with outer diameter at the bottom, color of dry tuber skin is 61D (deep purplish pink). The agroecosystem condition in North Sulawesi which is at medium until high altitude (600 -1100 above sea level) allegedly very suitable for Lansuna compared with Bima Brebes which usually planted in low altitude (< 500 above sea level). ABSTRAK Bawang Merah (Allium ascalonicum var. aggregatum) merupakan salah satu sayuran penting yang memiliki nilai ekonomi tinggi dengan permintaan yang terus meningkat. Permintaan yang terus meningkat harus diimbangi dengan peningkatan produksi yang dapat dilakukan dengan mengoptimasi sentra produksi yang berada di luar pulau jawa seperti di Sulawesi Utara. Penggunaan varietas yang sesuai dengan agroekosistem setempat merupakan salah satu langkah untuk optimasi produksi bawang merah di Sulawesi Utara. Bawang Merah Varietas Lansuna merupakan varietas baru yang diperoleh melalui seleksi massa dari bawang merah yang ditanam di Sulawesi Utara. Tujuan penelitian ini adalah mengidentifikasi keragaan Bawang Merah Varietas Lansuna sebagai varietas baru dibandingkan dengan varietas komersial nasional yaitu Varietas Bima Brebes. Penelitian dilakukan melalui metode observasi di empat desa di Kecamatan Tompaso Barat, Kabupaten Minahasa, Provinsi Sulawesi Utara. Hasil pengujian menunjukkan bahwa Lansuna memiliki keragaan yang secara nyata lebih baik dibandingkan dengan Bima Brebes. Bobot umbi per tanaman Lansuna lebih besar yaitu 127.26 g dibandingkan dengan Bima Brebes 76.95 g. Bawang Merah Varietas Lansuna memiliki bentuk umbi bulat dengan diameter terluar berada di pertengahan, warna kulit umbi kering adalah N57B (merah keunguan) sedangkan Bima Brebes memiliki bentuk umbi lonjong dengan diameter terluar berada di dekat perakaran dan warna kulit umbi kering 61D (merah muda). Kondisi agroekosistem daerah Sulawesi Utara yang berada di daerah dataran menengah sampai tinggi (600 -1100 mdpl) diduga sangat sesuai un...

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