Judul: Pengaruh Residu Insektisida Applaud 10 WP Tehadap Pe4rkembangan Populasi Aphis glycines Matsumura Pada Tanaman Kedelai (Glycine max (L) Merril)
Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui pengaruh residu beberapa perlakuan insektisida Applaud 10 P terhadap perkembangan populasi A. glycines. Dalam penelitian digunakan A. glycines sebagai serangga penelitian, tanaman kedelai sebagai tanaman inang dan Insektisida Applaud 10 WP sebagai perlakuan. Penelitian Ini menggunakan Rancangan Aeak Lengkap dengan model linear. Penelitian dilaksanakan dengan lima perlakuan insektisida dan setiap perlakuan diulang lima kali. Perlakuan tersebut adalah 0, 1, 10, 100 dan 1000 ppm, penempatan pot-pot penelitian dilakukan secara acak. Dilakukan analisis keragaman dan untuk melihat perbedaan antar perlakuan dilakukan uji Leda Nyata Jujur. Penelitian ini dilakukan di rumah kaca Jurusan Hama dan Penyakit Tumbuhan, pada bulan Juli sampai Agustus 1987. Insektisida Applaud 10 WP lebih berpengaruh terhadap populasi daripada kematian A. glycines. Pengaruh penekanan perkembangan populasi adalah dalam jangka waktu yang lama. ...
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Judul: Pengaruh Plant Growth Promoting Rhizobacteria terhadap Biologi dan Statistik Demografi Aphis glycines Matsumura (Hemiptera: Aphididae) pada Tanaman Kedelai
Abstrak: On various plants, Plant Growth Promoting Rhizobacteria (PGPR) application known can suppress the development of plant pest population. This research aimed at PGPR effects against biology and statistic demographic of Aphis glycines Matsumura (Hemiptera: Aphididae) on soybean plant. This research conducted in the Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University. PGPR application, which consists of Bacillus polymyxa and Pseudomonas fluorescens can extend second instar nymphs stadia and life cycle of A. glycines. PGPR application also can effect to statistic demographic of Aphis glycines. The gross reproduction rate, net reproduction rate, and intrinsic growth rate of A. glicines on PGPR application plant is lower than non PGPR application plant. Moreover, PGPR application plant can extend long generation and doubling time of A. glycines. The use of PGPR can inhibits the development of A. glycines population on soybean plant.
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology