Judul: Identifikasi Organisme Pengganggu Tanaman Gandum (Triticum aestivum L.) di Kuningan dan Bogor, Provinsi Jawa Barat
Abstrak: The development of wheat crops in Indonesia has been struggling to fulfill domestic needs which increase over time. Information about plant pest organisms which attack introduced (SO9) and IPB bred strain (Kasifbey) wheat is one of the main constraints to maintain production capacity of the wheat crops. Therefore, this research needs to be performed. The aim of this research is to find out information about the plant pest organisms on the SO9 and Kasifbey wheat. Observations on the crops have been conducted at the two places cultivation: in Leuwimalang village, Cisarua Subdistrict, Bogor District (705 m above sea surface) and in Cilimus village, Cilimus Subdistrict, Kuningan District (418 m above sea surface) West Java Province. Symptoms of the plant pest organisms which appear on the crops were observed. Subsequently, the extent and intensity of the pest attacks on the crops were quantified. Finally, the samples of the diseased crops and insects were identified at the laboratory using determination key identification. The insects which found on the wheat crops are some species of the Lepidoptera caterpillars and several species of aphids (Hemiptera: Aphididae), species of Oxya sp. (Orthoptera: Acrididae), Nezara viridula (Hemiptera: Pentatomidae), Leptocorisa oratorius (Hemiptera: Alydidae), white grub larvae (Coleoptera: Scarabaeidae), and stem borer. Pathogens which are found on the wheat crops: Fusarium sp., Helminthosporium sp., Phoma sp., Curvularia sp., and Alternaria sp.. The dominant pest in each location are different. The Oxya sp. is a dominant pest in Kuningan and attacks 100% of the sample area of the SO9 and Kasifbey wheat crops. On the other hand, Mythymna unipuncta is a dominant pest in Cisarua with more than 50% attacked area. Diseases of the wheat crops at both location are mostly caused by the Helminthosporium sp. with 100% diseases incidence. The Kasifbey is more frequently attacked by insects and pathogens than the SO9.
Keyword: Helminthosporium sp., Mythymna unipuncta, Triticum aestivum, Oxya sp., Wheat

Judul: Incidence and Severity of Corn Leaves Disease at Sukawening Village and Cibanteng Village in  Bogor Regency
Abstrak: Jagung merupakan komoditas pangan srategis di Indonesia. Salah satu penghambat budidaya jagung yaitu penyakit hawar daun jagung yang disebabkan Helminthosporium sp.. Hawar daun jagung menyebabkan kehilangan hasil hingga 50%. Penelitian ini bertujuan mendapatkan informasi mengenai kejadian serta keparahan penyakit hawar daun jagung di dua lokasi di Kabupaten Bogor. Metode yang digunakan dalam penelitian ini yaitu penentuan lokasi pengamatan, wawancara petani, pengamatan tanaman contoh, penghitungan kejadian dan keparahan penyakit, dan analisis data. Kejadian dan keparahan penyakit diamati langsung di lapangan pada 60 tanaman contoh yang dipilih secara zig zag. Wawancara dilakukan untuk mengetahui informasi teknik budi daya dan pengendalian penyakit hawar daun jagung oleh petani. Data kejadian dan keparahan penyakit dianalisis secara deskriptif. Berdasarkan hasil pengamatan, kejadian penyakit hawar daun jagung di Desa Sukawening dan Desa Cibanteng mencapai 100%. Tingkat keparahan penyakit di Desa Sukawening pada varietas Paragon sebesar 34,33%, tingkat keparahan penyakit pada varietas Exotic Pertiwi sebesar 28,33%, dan tingkat keparahan penyakit di Desa Cibanteng pada varietas Talenta sebesar 27,67%. Pengendalian penyakit dilakukan petani di lapangan dengan cara mencabut tanaman yang sakit, mengatur jarak tanam, dan mengaplikasikan fungisida. Kata kunci: Helminthosporium sp., pengendalian penyakit, penyakit tanaman, Corn is a strategic food commodity in Indonesia. One of the obstacles to maize cultivation is corn leaf blight caused by Helminthosporium sp. Corn leaf blight causes yield losses of up to 50%. This study aims to obtain information about the incidence and severity of corn leaf blight in Bogor Regency. The methods used in this study were determining the location of observations, interviewing farmers, observing sample plants, calculating the incidence and severity of the disease, and analyzing data. Disease incidence and severity were observed directly in the two locations on 60 plant samples selected in randomized zigzag design. Interviews were conducted to find out information on cultivation techniques and control of corn leaf blight by farmers. Disease incidence and severity data were analyzed descriptively. Based on the results of observations, the incidence of corn leaf blight at Sukawening Village and Cibanteng Village reached 100%. The severity of the disease at Sukawening Village on the Paragon variety was 34.33%, on the Exotic Pertiwi variety was 28.33%, and the disease severity at Cibanteng Village on Talenta variety was 27.67%. Disease management was carried out by farmers in the field by uprooting diseased plants, adjusting the spacing, and applying fungicides. Keywords: Helminthosporium sp., disease management, plant disease
Keyword: Helminthosporium sp., disease management, plant disease

Judul: Membran Komposit Kitosan-Zeolit untuk Aplikasi Direct Methanol Fuel Cell
Abstrak: Direct methanol fuel cell (DMFC) is a fuel cell that utilize methanol as the fuel source. The electrolyte membrane used in the DMFC system in this research was chitosan-zeolite composite membrane. The composite membrane was synthesized with chitosan-zeolite composition variation of 1:1, 1:2, 1:3, and 2:1. The membranes were analyzed by Fourier transform infrared spectrophotometer (FTIR) and scanning electron microscope, and for the specific gravity. Membrane performances were tested with methanol uptake, methanol permeability, conductivity, and potential difference in the DMFC system. The FTIR spectrum showed no formation of new functional groups inducating that the composite membrane was a result of physical mixing. Morphological analysis showed that the membrane was nonporous. Chitosan-zeolite 1:3 composite membrane had the highest specific gravity and methanol uptake, 1.4226 g/mL and 41.44%, respectively. The highest proton conductivity was showed by the 1:2 chitosanzeolite composite membrane, namely 7.2946× 10-7 S/cm. Based on this research results, chitosan-zeolite composite membrane can be applied in DMFC system.
Keyword: