Judul: Spesies Rayap (Ordo Blattodea) di Area Penggergajian Kayu di Kabupaten Sukoharjo, Jawa Tengah
Abstrak: MUHAMMAD CHOIRUL AMRI. Spesies Rayap (Ordo Blattodea) di Area Penggergajian Kayu di Kabupaten Sukoharjo, Jawa Tengah. Dibimbing oleh IDHAM SAKTI HARAHAP dan NADZIRUM MUBIN. Peningkatan jumlah bangunan penduduk berdampak semakin menyempitnya lingkungan hidup rayap dan dapat mengurangi sumber makanan rayap. Dalam mencari sumber makanan, rayap mampu merusak bangunan disekitarnya yang mengandung selulosa. Penelitian ini bertujuan untuk mengetahui spesies rayap yang ada di area penggergajian kayu di Kabupaten Sukoharjo, Jawa Tengah. Sampel rayap diambil dari tiga lokasi penggergajian kayu, yaitu di Kecamatan Mojolaban satu lokasi dan Polokarto dua lokasi. Tipe tanah dan vegetasi penutup tanah yang mendominasi di area pengamatan rayap diamati. Spesies rayap yang diperoleh di lapangan yaitu tiga spesies dari Famili Termitidae, yaitu Nasutitermes havilandi, Odontotermes javanicus, dan Macrotermes gilvus. Penggergajian kayu di Desa Panguripan memiliki jenis tanah aluvial. Jenis vegetasi penutup tanah yang mendominasi di sekitar area penggergajian kayu yang diamati adalah Chromolaena odorata (Kirinyuh) dan Leucaena leucocephala (Lamtoro). Spesies rayap yang ditemukan berpotensi sebagai hama di area penggergajian kayu., MUHAMMAD CHOIRUL AMRI. Species of Termites (Ordo Blattodea) in a Sawmills in Sukoharjo Regency, Central Java. Supervised by IDHAM SAKTI HARAHAP and NADZIRUM MUBIN. The increase in the number of residential buildings has an impact on the narrowing of the termite habitat and can reduce the termite food source. In searching for food sources, termites are able to damage buildings around them that contain cellulose. This study aims to determine the termite species that exist in sawmills in Sukoharjo Regency, Central Java. Termite samples were taken from three sawmill locations, namely one location in Mojolaban District and two locations in Polokarto. Soil type and dominant vegetation in the termite observation area is observed. The termite species obtained in the field were three species from the Family Termitidae, namely Nasutitermes havilandi, Odontotermes javanicus, and Macrotermes gilvus. The wood sawmill in Panguripan Village has alluvial soil type. The dominant vegetation cover around the observed sawmills is Chromolaena odorata (Kirinyuh) and Leucaena leucocephala (Lamtoro). The termite species found have the potential to be pests in the sawmills area.
Keyword: pest, soil, termitidae, vegetation

Judul: Serangan Rayap Tanah terhadap Tegakan Pohon di Kebun Raya Bogor
Abstrak: Pelestarian dan perlindungan terhadap pohon-pohon yang tersimpan di Kebun Raya Bogor (KRB) perlu dilakukan untuk menghindari kerusakan oleh berbagai macam penyakit maupun serangga perusak termasuk rayap. Penelitian bertujuan menganalisis frekuensi serangan rayap dan mengidentifikasi jenis rayapnya, menganalisis preferensi rayap terhadap jenis pohon, serta tingkat kerusakan pohon akibat serangan rayap di KRB. Penelitian dilakukan dengan menggunakan metode jalur sampling dengan Intensitas Sampling 20%. Hasil penelitian menunjukkan bahwa sebanyak 213 (100%) pohon contoh di KRB terserang rayap. Spesies rayap tanah yang ditemukan sekurang-kurangnya terdapat empat spesies yaitu Coptotermes curvignathus Holmgren, Macrotermes gilvus Hagen, Odontotermes javanicus Holmgren dan Nasutitermes matangensis Haviland. Rayap M. gilvus banyak ditemukan pada pohon Pterocarpus indicus, Dysoxylum spp., Shorea spp., dan Dimocarpus spp.. Rayap O. javanicus banyak ditemukan pada pohon Vitex cofassus, Dehaasia incrassata, Heritiera spp., dan Cordia spp.. Rayap N. matangensis banyak ditemukan pada pohon Canarium indicum, Dysoyylum spp., dan Sindora spp.. Rayap C. curvignathus banyak ditemukan pada pohon Araucaria columnaris, Agathis sp., dan Pinus spp. Tingkat kerusakan pohon contoh akibat serangan rayap sebesar 10-90%., Preservation and protection of trees stored in the Bogor Botanical Gardens (KRB) need to be done to prevent damage by various kinds of diseases and destructive insects including termites. This study aimed to analyze the frequency of termite attacks and to identify the type of termites, to analyze termite preferences for tree species, as well as the degree of tree damage due to termite attacks in KRB. The research was conducted using the path sampling method with a sampling intensity 20%. The results showed that as many as 213 (100%) sample trees in KRB were attacked by termites. There are at least four subterranean termite species found, namely Coptotermes curvignathus Holmgren, Macrotermes gilvus Hagen, Odontotermes javanicus Holmgren, and Nasutitermes matangensis Haviland. Termites M. gilvus are found in Pterocarpus indicus, Dysoxylum spp., Shorea spp., and Dimocarpus spp. Termites O. javanicus are found in Vitex colossus, Dehaasia incrassata, Heritiera spp., and Cordia spp. Termites N. matangensis is found in Canarium indicum, Dysoxylum spp., and Sindora spp. Termites C. curvignathus can be found in Araucaria columnaris, Agathis sp., and Pinus spp. The level of damage to sample trees due to termite attacks is 10-90%.
Keyword: Attack frequency, subterranean termites, termite preferences, tree health

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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