Judul: Kelimpahan Artropoda musuh alami dan hama pada pertanaman durian (Durio zibethinus L.) di Kebun Wisata Warso Farm, Bogor
Abstrak: Information of diversity and abundance of natural enemies and pests arthropod on durian plantation are required to implement an effective integrated pest management (IPM) technique. This study, conducted from October to December 2014 considered to explore and identify natural enemies and pest Arthropods in durian plantation at Warso Farm, Bogor. The methods to monitor the abundance of natural enemies and pests arthropod includes: pitfall traps, light traps, net insect, and direct observation. The result showed that the proportions of predators, herbivores, detrivores, parasitoids, and others were 52%, 32%, 13%, 1% and 2% respectively. Diversity of Arthropods calculated based on the Shannon-Wiener diversity index indicates that the largest Arthropod diversity is the diversity of herbivore Arthropod with index value of 2.645. Overall, diversity of Arthropods in durian plantation placed in the medium category
Keyword: Bogor Agricultural University (IPB), natural enemies., pests, arthropod, diversity, durian

Judul: Kelimpahan Artropoda Predator dan Artropoda lainnya pada Pertanaman Kelapa Sawit (Elaeis guineensis Jacq.) di PTPN VIII Cikasungka, Bogor.
Abstrak: Informasi kelimpahan artropoda predator dan artropoda lainnya pada tanaman kelapa sawit sangat diperlukan dalam pertimbangan pengambilan keputusan pengendalian dengan menggunakan teknik pemanfaatan musuh alami. Tujuan penelitian ini adalah mengeksplorasi dan menginventarisasi artropoda predator dan artropoda lainnya pada tanaman kelapa sawit di PTPN VIII Cikasungka, Bogor. Pengamatan ini dilakukan dengan 3 macam metode yaitu pengamatan langsung digunakan untuk mengamati dan mengambil artropoda yang berada pada tajuk dan disekitar tanaman sampel, pitfall trap digunakan untuk mengambil artropoda yang terdapat pada permukaan tanah, dan jaring serangga digunakan untuk mendapatkan artropoda yang aktif terbang. Hasil penelitian menunjukkan bahwa proporsi peran artropoda sebagai detrivor, predator, hama, dan parasitoid berturut-turut sebesar 71%, 21%, 7%, dan 1%. Artropoda predator yang paling dominan adalah semut (Hymenoptera: Formicidae) sebanyak 493 individu. Artropoda herbivora yang paling dominan adalah belalang (Orthophtera: Acrididae) sebanyak 225 individu. Artropoda detrivor yang paling dominan adalah serangga pengurai tanah (Collembola: Isotomidae) sebanyak 2 175 individu. Artropoda parasitoid yang paling dominan adalah (Hymenoptera: Eulopidae) sebanyak 80 individu.
Keyword: kelapa sawit, musuh alami, parasitoid

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition