Judul: Hama dan penyakit tanaman terung (Solanum melongena L.) di Kecamatan Rancabungur, Kabupaten Bogor
Abstrak: Eggplant (Solanum melongena L.) is a vegetable crop that quite common cultivated in Indonesia. The consumption level of eggplant increases from year to year. There are few information on pests and diseases of the crop in Indonesia. However, pests and diseases become potentially problem in the future when the crop is grown widely. The objective of this research was to obtain information about pest and disease occurrences found in eggplant growing area in Rancabungur their population or damage level. The research method included observation, sampling of the pests and diseases at two eggplant areas, and laboratory identification of the causal agents. The eggplant vegetative and generative growth phases were observed in the same area and period of time. There are some pests found predominantly in eggplant at high population i.e. Empoasca sp. (Hemiptera: Cicadellidae) and Epilachna sp. (Coleoptera: Coccinellidae), whereas Valanga sp. (Orthophtera: Acrididae) (low population), Acherontia sp. (Lepidoptera: Sphingidae), Bactrocera spp. (Diptera: Tephritidae), Mictis longicornis (Hemiptera: Coreidae), and Aulacophora sp. (Coleoptera: Chrysomelidae) were at low population. Eggplant’s diseases found at high incidence in the area were fruit rot (Phomopsis sp.) and anthracnose (Colletotrichum sp.), whereas leaf spot (Alternaria sp.) and bacterial wilt (Ralstonia solanacearum) were at low incidence. All of those pests and diseases, except Bactrocera spp., caterpillar, fruit rot, and anthracnose found at both growth phase of the plant. Fruit rot, and anthracnose were the most important diseases of eggplant at generative phase with the intensity about 47.09% and 40.84%.
Keyword: 

Judul: Penyakit Busuk Buah Pada Terong Di Kecamatan Rancabungur dan Kemang Kabupaten Bogor
Abstrak: Eggplant is one of the most wanted vegetables in Indonesia, even the world. It contains antioxidants which can be used to prevent periodontic disease. It also contains vitamin A and B, and it is good to be consumed by diabetics. Among many diseases in eggplant, fruit rot is one of the major factors as a limited factor in production of this crop. The objective of this study was to observe fruit rot disease condition in subdistricts Rancabungur and Kemang, the district of Bogor. The fruit rot pathogens identified as Phomopsis vexans and Colletotrichum melongenae were covered in all observation plots. Besides of fruit, these pathogens also caused the symptom on stems and/or branches. In one symptomized plant part, these two pathogens were able to appear singly or mixed with the other. In the dry season the symptom was only detected on fruit, while in the wet season can also occurred on stems and/or branches. The disease incidence on fruit during dry season was less than 5% and in the early wet season it increased up to 8%. In wet season observation, disease severity of each plant was varied and mostly higher in the mature plants. Single observation of 20 samples on diseased branches and stems, C. melongenae dominated (80%) as the causal agent.
Keyword: 

Judul: Simulasi persamaan keadaan bintang dengan pendekatan klasik dan relativistik
Abstrak: Komposisi bintang yang selalu berubah akanmempengaruhi massa dan radius bintang itu sendiri. Dimana semakin tua sebuah bintang, maka bintang akan didominasi oleh unsur-unsur berat. Dengan persamaan politrop dan metode Runge-Kutta orde 4 didapatkan radius dan massa bintang semakin berkurang seiring berkurangnya nilai Ye, sedangkan kerapatan semakin meningkat. Pendekatan terbaik terdapat pada nilai Ye sebesar 0.5 dimana didapatkan bahwa massa bintang katai putih sebesar 1.4Mo sesuai dengan massa Chandrasekhar dengan radius bintang 5000 km dan nilai kerapatan bintang sebesar 5.31x 106 g cm-3. Untuk massa bintang neutron diperoleh nilai 0.05Modan radius bintang sebesar 2300 km, sedangkan kerapatannya bintang neutron diperoleh sebesar 1.84 x 107 g cm-3 dengan menggunakan pendekatan relativistic. Pendekatan relativistic terbukti lebih baik untuk menentukan radius dan massa bintang, dengan pendekatan terbaik pada nilai Ye sebesar 0.5 yaitu pada bintang katai putih
Keyword: Composition of the stars, density of the stars, mass of the stars, radii of the stars