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: Interaksi Tritrofik dan Keanekaragaman Parasitoid pada Perkebunan Kelapa Sawit di Jambi
Abstrak: Interaksi trofik antara tanaman, hama dan musuh alami khususnya parasitoid memegang kunci utama dalam pengendalian hayati pada budi daya kelapa sawit. Kestabilan interaksi trofik dapat menekan tingkat serangan dan kerapatan hama pada perkebunan kelapa sawit. Penelitian ini bertujuan untuk mempelajari interaksi trofik antara kelapa sawit, hama dan parasitoid serta mengidentifikasi faktor yang memengaruhi keberadaan parasitoid dan menganalisis peran penting parasitoid pada perkebunan kelapa sawit. Penelitian ini dilakukan pada kebun kelapa sawit milik rakyat dan perkebunan kelapa sawit milik PT. Humusindo dari bulan April hingga Juni 2016. Pengambilan serangga dilakukan dengan metode pengambilan langsung, perangkap kuning (yellow sticky trap) yang diletakkan pada pangkal batang dan kanopi, serta menggunakan jaring serangga dalam plot yang berukuran 100 m x 100 m (100 tanaman kelapa sawit). Sampel berupa telur, larva dan pupa serangga hama diamati untuk mengetahui jenis parasitoid dan laju parasitisasinya. Sampel serangga hama dan parasitoid diidentifikasi sampai tingkat morfospesies. Jumlah hama yang ditemukan adalah sebanyak 15 morfospesies sedangkan jumlah parasitoid yang didapat adalah sebanyak 129 morfospesies. Limacodidae merupakan inang yang paling banyak berinteraksi dengan parasitoid, salah satu parasitoidnya adalah dari famili Braconidae. Keberadaan parasitoid di lahan kelapa sawit dipengaruhi oleh ketersediaan inang dan vegetasi tanaman berbunga.
Keyword: hama, kelapa sawit, parasitoid, pengendalian hayati

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