Judul: Keefektifan Formulasi Biopestisida Berbahan Aktif Staphylococcus epidermidis BC4 dan Pseudomonas fluorescens RH4003 Untuk Mengendalikan Layu Bakteri pada Tomat
Abstrak: Tomato (Lycopersicumesculentum) is one of the important horticultural commodity unfortunately the production is still low in quantity or quality. One of the important problems for the low productivity is the bacterial wilt disease caused by Ralstonia solanacearum. Some control methods have been developed but the disease still caused damages. One alternative control which can be prospective to be developed is the use of biocontrol agents. Among them the endophytic bacteria and Plant Growth Promoting Rhizobacteria (PGPR). The experiment was conducted to evaluate the viability of biocontrol agents, i.e. S.epidermidis BC4 and P. fluorescens RH4003 in the formula during storage and 3 the effectiveness of biopesticides formulation to control the bacterial wilt disease on tomato. Biopesticides were applied to the root during transplanting. Disease incidence and the height of the plant were calculated every week. Population of the bacteria in the formula was calculated at 0, 2, 4, and 8 weeks during storage. P. fluorescens RH4003 in granule formula applied into the soil caused disease suppression index up to 46.15%, which significantly lower compared with control, while S. epidermidis BC4 in liquid formulation with pH 5 caused disease suppression index up to 57.69%. Formula containing both of the bacteria did not affect the height growth of tomato plant. Population of the bacteria in the formula grew well at pH 5, 6, 7 and it was stable until 8 weeks of storage.
Keyword: plant growth promoting rhizobateria, endophytic bacteria, Biopesticide

Judul: Pengembangan Formulasi Biopestisida Berbahan Aktif Bacillus subtilis AB89 dan Staphylococcus epidermidis BC4 untuk Mengendalikan Penyakit Layu Bakteri pada Tomat
Abstrak: Ralstonia solancearum is a pathogen of bacterial wilt disease on tomato. One of the alternatives for disease control is the application of biocontrol agents. Biocontrol agents which have been able to control the disease are Bacillus subtilis AB89 (PGPR) and Staphylococcus epidermidis BC4 (endophyte). This research was conducted to evaluate the viability of those bacteria in formulation and the effectiveness of the formulation to control the bacterial wilt disease of tomato. B. subtilis AB89 (BS) and S. epidermidis BC4 (BC) ware formulated singly in liquid (BS and BC) and powder (TBS and TBC) formulation contained talc powder and/or xanthan gum. The liquid formulation of B. subtilis AB89 (BS) and S. epidermidis BC4 (BC) effectively suppressed the incidence of the disease, with control effectiveness was up to 55.55% and 54.94%, respectively. The liquid formulation BC, BS and the powder formulation TBS were able to promote the plant growth. Populations of S. epidermidis BC4 was stable within powder and liquid formulations during 8 weeks of storing. Population of B. subtilis AB89 in powder and liquid formulations declined on 1 week after storage, but stable until 8 weeks after storage.
Keyword: xanthan gum., R. solanacearum, PGPR, endophytic bacteria

Judul: Tingkah laku dan karakteristik suara Dugong dugon di Sea World Indonesia, Taman Impian Jaya Ancol, Jakarta
Abstrak: Dugong (Dugong dugon) merupakan mamalia laut yang bersifat herbivora dan memiliki status rentan terhadap kepunahan dalam IUCN Red List of Threatened Animals. Untuk memastikan keberlanjutan spesies tersebut di alam, dibutuhkan upaya pelestarian dengan konservasi baik secara in-situ maupun ex-situ. Upaya konservasi tersebut membutuhkan dukungan informasi dari penelitian-penelitian mengenai kehidupan dugong, seperti tingkah laku, karakteritik suara, pola makan, pola reproduksi, dan masih banyak lagi. Penelitian ini bertujuan untuk mendeskripsikan tingkah laku dan karakteristik suara dugong pada lingkungan buatan di Sea World Indonesia, Taman Impian Jaya Ancol, Jakarta.
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