Judul: Seleksi bakteri endofit untuk pengendalian penyakit rebah kecambah (Pythium sp.) pada tanaman mentimun
Abstrak: Damping-off is one of the major diseases that often attack almost any plants in the nursery phase. Cucumber is one of the main hosts for damping-off disease caused by Pythium sp. The use of biocontrol agents such as endophytic bacteria is one an alternative for controlling plant diseases. The objective of this study was to isolate an endophytic bacteria from betel and paddy and to select their potency in controlling damping-off disease on cucumber. The isolation of endophytic bacteria was carried out through surface sterilization method with 70% alcohol, 4% NaOCl and sterile distilled water. A total of 50 isolates of endophytic bacteria were isolated from the betel and two isolates from the paddy. Based on antibiosis test result, growth and suppression of endophytic bacteria against damping-off, four isolates AS2, BS14, Ci6, and Ci10 were known to have ability in suppressing the disease severity of damping-off up to 87.6% and able to increase the plant growth of cucumber in a greenhouse.
Keyword: plant growth., antibiosis, sterilization method, stem, root, paddy, Bete

Judul: Formulasi Pelet Berbahan Aktif Trichoderma sp. untuk Pengendalian Penyakit Rebah Kecambah (Pythium sp.) pada Tanaman Mentimun
Abstrak: Cucumber (Cucumis sativus Linn. ) is an important agricultural comodity in Indonesia, but the production rate of it still low. One of the factors that causes the low productivity is plant diseases. Damping-off disease often causes the damage of cucumber plant, early stage of cucumber plant growth. It is caused by Phytium sp, a fungus that lives in the soil as soilborne disease. The controlling effort of this disease have been done, for example by using Trichoderma sp. as bio-agent, but the utilization of the bio-agent still not practical so it is difficult to be applied in field. The utilization of Trichoderma sp as a pallet formulation is more effective to be implemented because of the small size and easily moved. The purpose of this research is to produce the pellet formulation with active material of Trichoderma sp. with high nutritious, cheap and easy carrier. This research uses two tests, invitro and invivo. The invitro test uses six different pellet formulations, DAT, UAT, TAT, PAT, DDS and ATS. The best formulation in invitro test byare UAT and DDS because Trichoderma sp can grow very well in these pellet formulation and the raw material of them are cheap and easily obtained. The DDS and UAT can suppress the attack of pathogenic fungus, Pythium sp. on the test with invivo
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Judul: Variabilitas Transpor Arlindo Laut Flores dan Kaitannya dengan ENSO
Abstrak: Air Arlindo yang masuk ke Indonesia sebagian besarnya dilewatkan Laut Flores. Variasi volume transport Arlindo dipengaruhi oleh fenomena anomali iklim interannual seperti El Nino Southern Oscillation (ENSO). Hasil studi terdahulu menyimpulkan terjadinya La Nina meningkatan jumlah transport Arlindo, sedangkan El Nino melemahkan transport Arlindo. Untuk memahami lebih lanjut keterkaitan ENSO dengan variabilitas transport Arlindo dilakukanlah penelitian menggunakan data hasil model INDESO dan hasil observasi satelit dengan rentang waktu 2008 hingga 2015. Penelitian dilakukan di Laut Flores dengan mengkaji bagian barat (119.5oBT) dan bagian timur (123oBT) untuk melihat volume Arlindo yang masuk ke dan keluar dari Laut Flores. Analisis sirkulasi dilakukan dengan menghitung rataan komponen arus dan suhu permukaan laut secara tahunan dan pada rentang tahun ENSO untuk melihat pola sirkulasi perairan. Estimasi volume transpor dihitung dari transek di pintu barat dan pintu timur. Deret waktu volume transpor Arlindo Flores kemudian dianalisis variabilitasnya dengan analisis penapisan lolos-pita(band-pass filter) dan transformasi wavelet sinambung (Continous Wavelet Transform). Hasil penting studi ini menunjukkan bahwa sumber utama Arlindo Flores berasal dari pembelokan Arlindo Makassar dan Arlindo pintu timur Indonesia yang masuk melalui terusan Lifamatola. Kecepatan Arlindo Flores di lapisan tercampur menguat pada musim barat sebaliknya di lapisan termoklin Arlindo Flores menguat pada musim timur. Sumbu utama Arlindo Flores didominasi oleh komponen arus zonal serta mengalami intensifikasi dan bergerak menyusur bagian utara Kepulauan Nusa Tenggara. Fluktuasi Arlindo Flores pada skala-waktu interannual menunjukkan volume transport maksimum terjadi pada tahun La Nina (November 2008-Maret 2009), sedangkan volume transpor minimum terjadi pada tahun El Nino (November 2014-Desember 2015). Struktur menegak Arlindo lebih kuat di kedalaman antara permukaan sampai 400 m. Variabilitas Arlindo Flores menandakan adanya fluktuasi pada periode intraseasonal, semi-annual, dan annual. Fluktuasi Arlindo skala interannual muncul jelas dari hasil penapisan lolos-pita, dimana fluktuasinya terlihat signifikan di kedalaman termoklin.
Keyword: Arus Lintas Indonesia, Laut Flores, ENSO, INDESO model, variabilitas volume transpor