Judul: Potensi Seduhan Limbah Baglog Jamur Tiram (Pleurotus ostratus) untuk Pengendalian Meloidogyne spp. pada Tanaman Tomat
Abstrak: Meloidogyne spp. is one of the important plant parasitic nematode on tomato causing root-knot disease. The objective of this study was to determine the effect of infusion of baglog oyster mushroom waste to control root-knot nematode Meloidogyne spp. on tomato. The Baglog oyster mushroom waste that used in this study is baglog of oyster mushroom that has been passed the generative phase and still contain the mycelium. A total of 8 kinds of infusion of baglog oyster mushroom waste with various compositions used in this study. Each infusion of baglog mushroom waste was applied with a different concentration namely 50%, 25%, and 5%. The fitotoxicity test of infusion of baglog oyster mushroom waste on tomato seedlings showed no toxicity effect on tomato plants. The application of infusion of baglog waste in the greenhouse showed that the infusion of baglog are able to suppress the formation of nematode-galls significantly compared to the control. The application of infusion of baglog of wet mushroom waste with 4 days aerated at concentration 5% is the most effective in suppressing the gall numbers. The result of in vitro test against the juveniles of nematodes showed that the infusion of baglog of mushroom waste may increase larvae inactive of Meloidogyne spp. compared to control. The results of in vitro test for nematode mortality showed that the treatment with infusion of baglog of wet oyster mushroom SBM 50% was able to increase the mortality of larvae up to 100% after 48 hours application. Based on these result it can be concluded that the infusion of baglog oyster mushroom waste have potential in controlling root-knot nematode Meloidogyne spp. on tomato
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Judul: Isolasi Bakteri Endofit dari Tanaman Kehutanan dan Potensinya untuk Pengendalian Meloidogyne spp. pada Tanaman Tomat
Abstrak: Meloidogyne spp. is one of the main constraints of tomato production in Indonesia. Endophytic bacteria as a biocontrol agents is an alternative for controlling nematodes. The objective of this study was to isolate endophytic bacteria from forest plants and to evaluate its potential for controlling Meloidogyne spp. on tomato (Lycopersicon esculentum Mill.). Endophytic bacteria were isolated from mahoni (Swietenia mahogany Jacq), trambesi (Albizia saman (Jacq.) Merr.), gaharu (Aquilaria malacensis), and meranti (Shorea sp.) with surface sterilization method using 70% alcohol, 4% NaOCl and steril water. The bacterial strain were cultured on tryptic soy agar (TSA) for two days. In vivo testing to determine the effect of bacteria for suppressing of nematode galls was conducted in the greenhouse with seed treatment. The result showed there are thirty three isolates of endophytic bacteria were isolated from the root of forest plant. twenty two isolates are negative reaction and eleven isolates are positif reaction after hypersensitive test using tobacco plant. Two isolates of endophytic bacteria MSJ1H and TSS1D were able to reduce gall number. Based on high plant indicator, soaking seed treatment with endophytic bacteria were able to increase the high of tomato plants.
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Judul: Frekuensi Orang Kidal Usia 6-21 Tahun di Setu Babakan, DKI Jakarta.
Abstrak: Handedness didefinisikan sebagai preferensi seseorang dalam penggunaan salah satu tangan, baik kanan maupun kiri, secara lebih dominan untuk melakukan berbagai kegiatan sehari-hari dengan lebih tepat. Handedness dipengaruhi oleh faktor genetik, perkembangan, dan budaya. Orang dengan preferensi tangan kiri biasa disebut dengan kidal. Frekuensi orang kidal selalu lebih rendah dibandingkan orang yang tidak kidal. Terdapat sekitar 10% dari total populasi di dunia yang kidal. Tujuan penelitian ini adalah mempelajari handedness serta menentukan frekuensi orang kidal di Setu Babakan, DKI Jakarta dengan survei kuesioner. Subjek penelitian ini merupakan pria dan wanita yang tinggal di Setu Babakan, DKI Jakarta dengan rentang usia 6-21 tahun. Frekuensi orang kidal di Setu Babakan adalah 4.1%. Frekuensi orang kidal lebih tinggi ditemukan pada pria dibandingkan dengan wanita. Frekuensi orang kidal cenderung menurun pada kelompok usia yang lebih tua. Hal tersebut mengindikasikan tekanan budaya, sosial, dan lingkungan yang memengaruhi handedness.
Keyword: betawi, handedness, kidal