Judul: Keanekaragaman Hama dan Parasitoid pada Perkebunan Kelapa Sawit di Jambi
Abstrak: One of the most important ecosystem service is biological control since it provide natural control and prevents pest population build up. Biological control is quite widely practiced in various types of ecosystems, including in the oil palm plantations. One aspect that is important in the practice of biological control is parasitoid abundance and wealth, as natural enemies of pests of oil palm. The objective of this research was to study the diversity of pests and its parasitoids at various age levels in oil palm plantation. Field observations were conducted 4, 6, 8, and 10- years old of oil palm plantation in Jambi from February to April 2014. Insects were collected using direct observation and yellow pan trap (YPT). Traps were placed on the canopy and stem on 50x50 m plots (consisting of 36 palm trees). Pests that were collected from direct observation were reared and identified in the laboratory. Parasitoids which emerge from pests as well as from traps were all identified until morpho-species or species level. Overall, 525 individuals were collected. The most dominant pests found in the field was Lymantriidae. There was no correlation between pest abundance and age of oil palm. Nineteen species of parasitoids were found be associated with pests from the oil palm. The dominant parasitoids from the family Eulophidae and Braconidae. These parasitoids parasitized the dominant pest from Lymantriidae, Psychidae, and Limacodidae families with parasitization rate that varies from 1.61-14.29%. Pest populations affected by phenology and plant architecture cause movement and increased pest attack while parasitoid populations affected by the presence of flowering plants as food source of adult parasitoids.
Keyword: direct observation, habitat transformation, parasitoid, yellow pan trap

Judul: Keanekaragaman Parasitoid Hymenoptera pada Tanaman Kelapa Sawit dengan Strata Umur yang Berbeda di Kabupaten Batanghari, Jambi
Abstrak: Serangga parasitoid merupakan salah satu agens hayati yang digunakan dalam melaksanakan pengendalian hama secara biologis. Umur tanaman berpengaruh terhadap kelimpahan serangga parasitoid Hymenoptera, tanaman muda memiliki komposisi parasitoid yang lebih kompleks dibandingkan tanaman tua. Penelitian ini bertujuan untuk menginformasikan keanekaragaman jenis serangga parasitoid Hymenoptera yang berada di tanaman kelapa sawit dan membandingkan keanekaragaman parasitoid pada umur yang berbeda. Penelitian ini dilakukan pada tanaman kelapa sawit dengan umur 2, 4, 6, dan 8 pada bulan April sampai November pada tahun 2015 di Kabupaten Batanghari. Pengambilan serangga dilakukan dengan cara koleksi langsung, perangkap kuning (yellow pan trap), dan malaise trap. Perangkap kuning diletakkan pada kanopi dan pangkal batang kelapa sawit dengan jumlah plot sebanyak 16 plot dalam satu plot terdapat 36 pohon kelapa sawit. Serangga yang telah dikoleksi kemudian dipelihara dan diidentifikasi hingga tingkat morfospesies di laboratorium. Hasil penelitian menunjukkan tanaman muda memiliki keanekaragaman parasitoid Hymenoptera lebih tinggi dibandingkan tanaman tua. Parasitoid yang dominan pada perkebunan kelapa sawit yaitu Aphelinidae, Diapriidae, Mymaridae, and Scelionidae. Hama yang ditemukan dari ordo Lepidoptera yaitu Lymantriidae, Limacodidae, Geometridae, dan Pshycidae.
Keyword: biological control, oil palm plantations, parasitic wasps

Judul: Analisis Sifat Kristal Dan Sifat Optik Pada Keramik SrTiO3 Didadah RuO2
Abstrak: Sintesis keramik Stronsium Titanat (SrTiO3) didadah Rutenium Oksida (RuO2) metode reaksi padatan (solid state) telah berhasil dilakukan. Keramik di annealing dengan suhu 850C. Karakterisasi keramik Stronsium Titanat (SrTiO3) didadah Rutenium Oksida (RuO2) dengan variasi konsentrasi pendadah (0%; 0,5%; 1%) dilakukan untuk mengetahui pengaruh konsentrasi pendadah Rutenium Oksida (RuO2) terhadap sifat kristal dan sifat optik pada keramik Stronsium Titanat (SrTiO3). Struktur kristal keramik berbentuk kubus dengan ukuran parameter kisi a=b=c berturut-turut senilai 3,905 Å; 3,905 Å; dan 3,903 Å. Sifat optik keramik ditunjukkan dengan optik longitudinal dan transversal yang berada pada bilangan gelombang 261-937 cm-1 dan nilai energi celah pita sebesar 3,48 eV-3,56 eV., The synthesis of Strontium Titanate (SrTiO3) ceramic doped with Ruthenium Oxide (RuO2) using the solid-state reaction method has been successfully conducted. The ceramics were annealed at a temperature of 850°C. Characterization of Strontium Titanate (SrTiO3) ceramic doped with Ruthenium Oxide (RuO2) with varying dopant concentrations (0%; 0.5%; 1%) was performed to understand the influence of Ruthenium Oxide (RuO2) dopant concentration on the crystal properties and optical properties of Strontium Titanate (SrTiO3) ceramics. The ceramic's crystal structure is cubic with lattice parameter sizes of a=b=c, respectively, measuring 3.905 Å; 3.905 Å; and 3.903 Å. The optical properties of the ceramic are indicated by longitudinal and transverse optics in the wavenumber range of 261-937 cm-1 and a bandgap energy value ranging from 3.48 eV to 3.56 eV.
Keyword: ceramic, crystal properties, optical properties