Judul: Uji Lapangan Pengendalian Hama Terpadu Biointensif terhadap Wereng Batang Cokelat dan Hawar Daun Bakteri pada Padi.
Abstrak: Padi merupakan komoditas pertanian yang sangat penting. OPT seperti wereng batang cokelat (WBC) dan hawar daun bakteri (HDB) merupakan salah satu kendala produksi padi. Pengelolaan hama terpadu dengan mengutamakan pemanfaatan sumber daya hayati merupakan pendekatan yang diharapkan dapat berkelanjutan dan ramah lingkungan. Penelitian ini bertujuan untuk membandingkan teknologi PHT bio-intensif dengan metode konvensional dalam pengelolaan WBC dan HDB pada padi serta pengaruhnya terhadap hasil gabah kering panen panen (GKP) di Kecamatan Sampang, Kabupaten Cilacap. Variabel pengamatan berupa kepadatan populasi WBC dan intensitas penyakit HDB diamati setiap minggu, sedangkan bobot gabah kering panen diamati pada akhir percobaan. Hasil penelitian menunjukkan bahwa teknologi PHT bio-intensif relatif mampu menekan perkembangan WBC dan HDB pada padi dibandingkan dengan metode konvensional. Hasil bobot GKP PHT bio-intensif cenderung lebih tinggi dari metode konvensional, namun tidak berbeda signifikan secara statistik. Diantara perlakuan yang diuji, perlakuan BIO 2 menunjukkan keuntungan tertinggi dibandingkan perlakuan lainnya., Rice is a very important agricultural commodity. Plant pests such as the brown planthopper (BPH) and bacterial leaf blight (BLB) are one of rice productions constraints. Integrated pest management by prioritizing the use of biological resources is an approach which is expected to be sustainable and friendly to the environment. This study aims to compare bio-intensive IPM technology with conventional methods in managing BPH and BLB in rice and its effect on harvested dry grain yields in Sampang District, Cilacap Regency. The variables were weekly observation of BPH population density and BLB disease intensity, and harvested dry grain weight at the end of experiment. The result showed that bio-intensive IPM technology was relatively able to suppress the development of rice BPH and BLB comparing to conventional method. The production of harvested dry grain in the bio-intensive IPM treatment tended to be higher than the conventional treatment although not statistically different. Among treatments tested, BIO 2 treatment showed highest profit over other treatments.
Keyword: biological resources, environmental friendly, production yield, sustainable agriculture

Judul: Population of Plant-hoppers and Spiders in Biointensive and Conventional Rice Croping
Abstrak: Padi merupakan salah satu tanaman serelia penting yang digunakan sebagai makanan pokok sebagian besar penduduk dunia. Padi tergolong dalam tanaman pangan berupa rumput berumpun dan memiliki kemampuan beradaptasi yang tinggi pada berbagai kondisi lingkungan. Penelitian bertujuan mengetahui perbandingan populasi hama wereng dan populasi laba-laba pada pertanaman padi biointensif dan konvensional di Kampung Darim, Kecamatan Terisi, Kabupaten Indramayu, Provinsi Jawa Barat. Metode penelitian yang digunakan adalah metode pengamatan langsung dilakukan dengan menetapkan titik pengamatan secara terpilih yang mewakili bagian tengah lahan sawah dengan ukuran 10 m x 10 m. Pada setiap lahan sawah ditentukan 100 grid pengamatan, grid pengamatan berukuran 1 m2. Data diolah dan dianalisis menggunakan aplikasi Microsoft excel 2013. Hasil penelitian menunjukkan bahwa populasi wereng lebih tinggi pada lahan pertanaman padi dengan perlakuan biointensif, populasi laba-laba lebih tinggi pada lahan pertanaman padi dengan perlakuan biointensif. Spesies yang ditemukan yaitu Araneus inustus, Neoscona theisi, Atypena adelina, Pardosa pseudoannulata, Tetragnathidae sp., Oxyopes javanus, dan Harmochirus sp. Dominasi spesies yang ditemukan yaitu Atypena adelina baik pada lahan dengan perlakuan biointensif maupun konvensional. Famili yang mendominasi pada pada lahan dengan perlakuan biointensif maupun konvensional adalah Famili Araneidae., Rice is one of the important cereal crops which is used as a staple food for most of the world's population. Rice is classified as a food crop in the form of clump grass and has high adaptability to various environmental conditions. This study aims to determine the comparison of planthopper populations and spider populations in biointensive and conventional rice plantations in Darim Village, Terisi District, Indramayu Regency, West Java Province. The research method used is a direct observation method carried out by determining selected observation points that represent the middle of the rice field with a size of 10 m x 10 m. In each rice field, 100 observation grids are determined, the observation grid is 1 m2 in size. The data was processed and analyzed using the Microsoft Excel 2013 application. The results showed that the planthopper population was higher on rice plantations with biointensive treatment, the spider population was higher on rice plantations with biointensive treatment. The species found were Araneus inustus, Neoscona theisi, Atypena adelina, Pardosa pseudoannulata, Tetragnathidae sp., Oxyopes javanus, and Harmochirus sp. The dominant species found was Atypena adelina both on land with biointensive and conventional treatment. The family that dominates on land with biointensive and conventional treatment is the Araneidae family.
Keyword: dominasi, keragaman, musuh alami

Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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