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Ditemukan 1874 dokumen yang sesuai dengan query
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M. Soehardjan
Jakarta: UI-Press, 1983
R 632.9 SOE d
Buku Referensi  Universitas Indonesia Library
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"Soybean pod borer (Etiella zinckenella treitschke) is an reported from all of soybean planting areas in Indonesia. Besides E. zinckenella, there are four others pod borer species identified in Indonesia, namely E hobsoni Butler, E.chrsoporella Meurick, E. grisea drososcia Meyrick stat n and E behrii zeller E zinckenella is wedely causing severa damage to soybean areas...."
Artikel Jurnal  Universitas Indonesia Library
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Dodin Koswanudin
"ABSTRACT
The Asian corn borer, Ostrinia furnacalis (Guenee) (Lepidoptera: Crambidae), is one of the most serious insect pests of maize in Indonesia, Japan, China and other Asian countries. The insect is not easily controlled by insecticides because the larvae develop and hide in the corn stem. The application of pheromone usually aims to control insect pests, to monitor its occurrence, or for mass trapping. Sex pheromone components of this spesies has been intensively studied in Japan and China. However, in Indonesia this has not been extensively explored yet. Samudra et al. (2006, unpublished) analyzed sex pheromone gland extracts of O. furnacalis from Bogor (Indonesia) by gas chromatography (GC) and GC combined with mass spectrometry (GC-MS) and identified as (Z)-12- tetradecenyl acetate and (E)-12-tetradecenyl acetate at ratio of about 62 : 38.
In this research, we studied the attractiveness of (Z)-12- tetradecenyl acetate and (E)-12-tetradecenyl acetate at different ratios and quantities in a laboratory wind-tunnel bioassay and field experiments. The percentages (ratios) of Z-12-tetradecenyl acetate tested were 100, 90, 65, 50, 35, 10 and 0 % in 100 μg mixture of Z- and E-12-tetradecenyl acetate. The quantities of mixture of two components tested were 50, 100, 250, 500,1000 ug per rubber septum.
An indoor wind-tunnel (30 cm in diam. x 200 cm) was used to test the biological activities of the chemicals, and the experiment was carried out in a scotophase (a dark period). Four criteria were used to judge the behavioral responses of the insect :1. starting flight, 2. orientation, 3. reaching the source, and 4. landing on the source. Semi-field experiment was carried out in a screen house (20 m x 6 m). One hundred males of one day old moth, were released in screen house and number of males caught in each trap were recorded in three days. Field experiments were conducted in sweet corn fields at Bogor and Bandung, West Java. Number of male(s) caught in each trap were recorded every three days during 54 days. The experiment was aranged in a complete randomize designed and the data were analysed with ANOVA and subjected to HSD test.
The results of wind tunnel bio-assay showed that the mixture of (Z) and (E)-12-tetradecenyl acetate with ratio 65 : 35 was the most attractive, 60 ? 100% of tested males landed on pheromone source. The semi-field experiment, it also showed that the pheromone mixture of (Z)- and (E)-12-tetradecenyl acetate with ratio 65 : 35 caught more males, for both corn borer populations from Bogor and Bandung. The best quantity of pheromone was showed by 500 μg/rubber septum with ratio 65 : 35 (Z : E)-12-tetradecenyl acetate. Field experiment data in Bogor and Bandung showed that binary blend of synthetic (Z)- and (E)-12-tetradecenyl acetate with ratio 65 : 35 was significantly more attractive than 3 virgin females. Insect caught in trap increased with the increase of amount of pheromone sex in a range of 50 to 500μg/ rubber septum. There was less males caught in the treatment of 1000 μg/rubber septum, both in Bogor and Bandung field experiments.
Based on laboratory and field trap experiments, we conclude that the sex pheromone of O. furnacalis, composed of (Z)-12-teradecenyl acetate and (E)-12-tetradecenyl acetate at ratio 65 : 35, is the most attractive to the asian corn borer. The binary blend at amount 500 μg/rubber septum attracted nearly three times more males than did by virgin females"
[, ], 2008
T39489
UI - Tesis Open  Universitas Indonesia Library
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Tyasning
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2001
S31227
UI - Skripsi Membership  Universitas Indonesia Library
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"Gunda ochracea walkr (Lepidoptera : Bombycidae) in this report , has been recorded for the first time from Gunung Halimun - salak National Park..."
Artikel Jurnal  Universitas Indonesia Library
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Bethell, Zillah
Jakarta: Bhuana Ilmu Populer, 2023
808.899 BET s
Buku Teks SO  Universitas Indonesia Library
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Bethell, Zillah
Jakarta: Bhuana Ilmu Populer, 2023
808.899 BET s
Buku Teks  Universitas Indonesia Library
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Hakan Ahmad Fatahillah
"Leptospirosis adalah penyakit zoonosis menular yang disebabkan bakteri patogen yang disebut Leptospira yang disebarkan secara langsung atau tidak langsung dari hewan ke manusia. Penyebaran kepada manusia umumnya melalui urin tikus dan/atau air yang terkontaminasi oleh bakteri Leptospira. Hewan yang menyebarkan penyakit ini umumnya adalah hewan mamalia kecil, seperti tikus; dan hewan domestik, seperti sapi, babi, anjing, kambing, kuda, dan kerbau. Di Indonesia, Leptospirosis telah menjangkit 8 provinsi pada tahun 2018 hingga Januari 2019. Sebanyak 866 orang telah terinfeksi penyakit ini dan 147 diantaranya meninggal dunia. Skripsi ini membahas tentang pembentukan model matematika penyebaran penyakit Leptospirosis pada populasi dan tikus yang tujuannya adalah untuk mengkaji dinamika penyebaran penyakit Leptospirosis secara analitik dan numerik. Untuk mempermudah pengambilan kesimpulan, pembahasan model matematika dibagi menjadi tiga bagian, yaitu pembahasan mengenai dinamika penyebaran penyakit Leptospirosis pada populasi manusia dan bakteri, dinamika penyebaran penyakit Leptospirosis pada populasi tikus dan bakteri, dan dinamika penyebaran penyakit Leptospirosis pada populasi manusia, tikus, dan bakteri. Di setiap bagian, kajian analitik digunakan untuk menganalisis titik keseimbangan bebas penyakit, titik keseimbangan endemik, basic reproduction number (R_0), dan analisis kestabilan titik keseimbangan. Selanjutnya, simulasi numerik dilakukan untuk mendukung hasil dari kajian analitik, di mana simulasi numerik yang dilakukan adalah analisis sensitivitas dan elastisitas dari R_0 untuk melihat parameter yang memiliki pengaruh terbesar, serta simulasi autonomous yang merupakan simulasi untuk dinamika jangka panjang dari model. Hasil tersebut selanjutnya diberikan interpretasi agar dapat disesuaikan dengan keadaan yang ada di lapangan.

Leptospirosis is an infectious zoonotic disease caused by a bacterial pathogen called Leptospira that is spread directly or indirectly from animals to humans. Spread to humans is generally through rat urine and / or water contaminated by Leptospira. The animals that spread this disease are generally small mammals, such as rats; and domestic animals, such as cows, pigs, dogs, goats, horses, and buffaloes. In Indonesia, Leptospirosis has infected 8 provinces from 2018 to January 2019. A total of 866 people have been infected with this disease and 147 of them died. This study discusses the derivation of a mathematical model of the spread of Leptospirosis in humans and rats with the aim of analyzing the dynamics of the spread of Leptospirosis both analytically and numerically. For the purpose of making conclusion easily, the discussion of mathematical models is divided into three parts, namely a discussion of the dynamics of the spread of Leptospirosis in humans and bacteria, the dynamics of the spread of Leptospirosis in rats and bacteria, and the dynamics of the spread of Leptospirosis in humans, rats, and bacteria. In each section, analytical studies are used to analyze the disease-free equilibrium point, endemic equilibrium point, basic/type reproduction number (R_0), and equilibrium stability. Furthermore, numerical simulations are carried out to support the results of analytical studies, in which the numerical simulations performed are the sensitivity and the elasticity analysis of R_0 to see which parameters have the greatest influence, and autonomous simulations are done for long-term dynamics of the model. The results are then interpreted so that they can be adjusted to the conditions in the real problem."
Depok: Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2021
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UI - Skripsi Membership  Universitas Indonesia Library
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