Judul: Siklus hidup dan perilaku parasitoid Brachymeria sp (Hymenoptera : Chalcididae) pada inang Erionota thrax L. (Lepidoptera : Hespenidae)
Abstrak: Penelitian ini dilaksanakan di Laboratorium Jurusan Hama dan Penyakit Tumbuhan, Fakultas Pertanian Universitas Sam Ratulangi Manado, bertujuan untuk mempelajari siklus hidup dan perilaku parasitoid Brachymeria sp. pada inang E- thrax sebagai hama penggulung daun pisang. Hasil pendeterminasian spesies parasitoid berdasarkan ciri-ciri morfalogi serangga jantan dan betina dewasa, kunci identifikasi spesies menunjukkan sebagai Brachymeria obscurata (WALKER). Siklus hidup parasitoid pada inang pupa E- thrax di Laboratorium Jurusan Hama dan Penyakit Tumbuhan Manado menunjukkan bahwa sejak telur diletakkan sampai menjadi imago dan mati adalah rata-rata 22,60 hari. Telur bertipe hymenopteriform. Di dalam tubuh inang telur mengalami perkembangan ukuran baik panjang maupun. lebar. Sejak hari pertama (0 - 12 jam) telur diletakkan, ukuran panjang rata-rata 0,89 mm dan lebar 0,14 mm. menjelang menetas, panjang telur telah mencapai Setelah rata-rata 1,67 mm dan lebar 0,29 mm. Stadia telur rata-rata 2,7 hari. ...
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Judul: Biologi Parasitoid Brachymeria lasus Walker (Hymenoptera: Chalcididae) pada Ulat Penggulung Daun Pisang Erionota thrax Linnaeus (Lepidoptera: Hesperiidae)
Abstrak: This research was conducted to study some biological aspects of parasitoid, Brachymeria lasus , such as the life cycle, morphology , and the behavior. Research was carried out in The Laboratory of Parasitoid and Predator Biology, Department of Plant Protection, Bogor Agricultural University. Pupae of Erionota thrax parasitized by B. lasus were collected from the field and then were maintained in plastic containers until the emergence of parasitoid adults. Mated females of B. lasus were kept in a test tube (20 cm long, 3 cm in diameter), and then were provided with 1-day-old pupae of E. thrax to be parasitized. Parasitized pupae of E. thrax then were moved to another test tube and were used for observation of the parasitoid biology. The morphological features of the parasitoid larvae and pupae were observed by dissecting parasitized pupae every day starting on the second day after parasitization. To observe the life cycle of the parasitoid, parasitized pupae of E. thrax were maintained in test tubes until the eclosion of parasitoid adults. In general, adults of B. lasus (females and males) were black in color with the body size was less than 6 mm, and were characterized with the large femur of the hind legs. B. lasus have hymenopteriform eggs, hymenopteriform larvae, and exarate type pupae. The life cycle of B. lasus ranged 13-14 days. Adults of B. lasus mostly emerged in the morning within 07:00 - 11:00 hours
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Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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