Judul: Distribusi Spasial Serangan dan Biologi Aulacaspis tegalensis Zehntner (Hemiptera: Diaspididae) pada Tanaman Tebu
Abstrak: The decrease of sugar production can be caused by a decrease in productivity of sugarcane, one of which is caused by pests. The sugarcane scale, Aulacaspis tegalensis, is a pest that sucks sucrose liquid stored in parenchyma cells on sugarcane stalk. The aim of this study were to determine the dispersion pattern and to observe the biology of the pest. The study was conducted at Laboratory of Insect Bionomy and Ecology, Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University and at Laboratory of Entomology, Department of Research and Development of Gunung Madu Plantations (GMP), Lampung from March to October 2014. The insect samples were collected from sugarcane field at GMP and kept in laboratory to observe its biological aspects. Field observation on the insect population was also conducted at sugarcane plantation field of GMP. The result showed that the spatial distribution pattern of A. tegelensis infestation on three varieties of sugarcane with different susceptibility were clumped. A. tegalensis have two instars nymph. The average of nymph stadia was 17.11 ±0.90 days. Pre oviposition and oviposition periods were 5.89 ± 1.12 days and 11.19 ± 6.23 days respectively. The female can lay on average of 210.03 ± 114.29 eggs during their lifetime. Eggs were laid under the female scale. The longevity of adult female was 17.13 days.
Keyword: Bogor Agricultural University (IPB), scale insect sugarcane pest., Saccharum officinarum, Gunung Madu Plantations

Judul: Serangan Hama Uret di Perkebunan Tebu Jengkol Kabupaten Kediri
Abstrak: Sugarcane is one of the major estate commodities as source of white sugar. Among constraints limit the sugarcane culture is damage by grubs that could reduce 45% - 60% sugar production. The objective of this research is to study the damage caused by whitegrub and their natural enemies in Jengkol plantation, owned by Pesantren Baru Sugar Factory PTPN X Plosoklaten, District Kediri, East Java Province. The research has been conducted from July 2014 until August 2014. Observation of the grub infestation has been carried out in 23 fields covering 4.10 to 12.95 Ha each field. Using diagonal method, five plots in each field and five subplots in each plot were determined to be sampled. In each subplot digging was done to check the presence of insect pest. The collected insect then reared and observed in the laboratory. The result showed that all insect samples were in the larval stage, consisted of two species i.e. Lepidiota stigma (Coleoptera: Scarabeideae) and Euchlora viridis (Coleoptera: Scarabeideae). Of the collected samples, 95.23 % were dominated by E. viridis. The plant damage were not in correlation with the clone of sugarcane. The infestation of white grubs on sugarcane in Jengkol estate was estimated low, ranged between 0.01% – 10.6%. In this estate neither parasitoids nor entomopathogenic fungi were found. Presumably the intensive use of chemical insecticides limited the pest population and caused the absence of parasitoid and entomopathogenic fungi.
Keyword: Bogor Agricultural University (IPB), parasitoid, clone, Euchlora viridis, Lepidiota stigma

Judul: Peranan Polivinil Pirolidon terhadap Kinerja Membran Nafion pada Sistem Direct Methanol Fuel Cell
Abstrak: Nafion adalah membran yang umum digunakan sebagai proton exchange membrane (PEM) untuk direct methanol fuel cell (DMFC). Permasalahan utama Nafion yaitu methanol crossover yang tinggi. Oleh sebab itu, Nafion dimodifikasi permukaannya dengan pelapisan polivinil pirolidon (PVP) untuk meningkatkan kestabilan kimianya. Penelitian ini bertujuan mempelajari pengaruh penambahan konsentrasi polivinil pirolidon terhadap kinerja membran Nafion pada DMFC. Membran yang dihasilkan diharapkan memiliki kestabilan kimia yang lebih baik untuk mengurangi methanol crossover, serta memiliki konduktivitas yang tinggi. Penambahan PVP dibuat dengan variasi konsentrasi 4%, 6%, dan 9% dalam bentuk lapisan pada Nafion sebagai PEM untuk DMFC. Kemudian membran diuji dengan hasil nilai konduktivitas proton tertinggi dihasilkan pada Nafion-PVP 9% dengan nilai 0,0183 S/cm. Untuk nilai beda potensial dan arus tertinggi dihasilkan juga pada Nafion-PVP 9% dengan nilai berturut-turut 0,829 mV dan 0,802 A. Hasil uji kualitatif permeabilitas metanol menunjukkan tidak ada metanol yang terdifusi. Berdasarkan ciri tersebut, membran Nafion-PVP dapat diaplikasikan sebagai PEM untuk DMFC.
Keyword: direct methanol fuel cell, membran, nafion, polivinil pirolidon (PVP)