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All Journal Natural Science: Journal of Science and Technology Agroland : Jurnal Ilmu-Ilmu Pertanian AGROTEKBIS AGROLAND: The Agricultural Sciences Journal JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) AGROTEKBIS: Jurnal Ilmu Pertanian
Johanis Panggeso
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Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Economics, Econometrics & Finance Education Engineering Public Health Other

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Journal : AGROTEKBIS

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EFEKTIVITAS BERBAGAI KONSENTRASI NEMATODA ENTOMOPATOGEN (Steinernema sp) TERHADAP MORTALITAS LARVA Spodoptera exiqua Hubner Ria, Kamariah; Natsir, Burhanuddin; Panggeso, Johanis
AGROTEKBIS Vol 1, No 1 (2013)
Publisher : AGROTEKBIS

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Spodoptera exiqua is known as onion caterpillar, it attacks often reduces onion production.  This insect could even cause harvest failure, and chemicals in high doses and spraying is often used to control on its spread. This action can negatively impact to environment as well the users. To reduce the negative impact of the use of chemical insecticides is necessary to find an alternative strategy. It is known that several biological agents could serve as biopesticides such as  entomopathogenic nematodes Steinernema sp. This study was aimed to determine effective concentration of entomopathogenic nematodes Steinernema sp. to control S. exiqua growth.  Nematode used in this study was Infective juvenile (IJ) instar II. There were 6 different nematodes concentrations as treatments and each treatment was repeated 4 times in a Completely Randomized Design (CRD).  The treatments were 0 IJ, 200 IJ, 400 IJ, 600 IJ, 800 IJ, and 1000 IJ of nematodes, mixed in 2 ml of distilled water, respectively.  The results showed that the concentration of nematodes 600 JI is effective to kill 83.4% larvae of S. exiqua within 6 days. This finding clearly shows that nematode is able to reduce larvae S.exiqu and expecting a positive impact to onion production.
Uji Ketahanan Beberapa Varietas Jagung (Zea mays L.) Terhadap Intensitas Serangan Penyakit Bulai (Peronosclerospora maydis) J, Pajrin; Panggeso, Johanis; I, Rosmini
AGROTEKBIS Vol 1, No 2 (2013)
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The research was conducted in the Soulowe of village, District Biromaru, Sigi. Experimental design used was Randomized Block Design (RBD) with 3 (three) treatments and 5 (five) replications, in order to obtain 15 units of the experiment.  Each treatment is based on the differences in varieties. These varieties are varieties Bonanza, Paramita and Kumala. The variables measured were the intensity of the attacks and the rate of infection diseases. The first observation made at the time the plant was 14 days after planting, subsequent observations made at intervals of once a week as much as 7 times. The results of this study showed that the difference in response of resistance varieties Bonanza, Paramita and Kumala against downy mildew caused by the fungus Peronosclerospora maydis. The highest attack intensity was found in varieties Bonanza followed by Kumala varieties, while the lowest was found in varieties Paramita. The highest disease infection rate was varietas Bonanza, then followed by Kumala varietas, and then Paramita varieties that have the lowest disease infection rate.
Co-Authors Aminullah, Moh. Fajri S. Asrul Asrul Asrul Asrul Burhanuddin Nasir Burhanuddin Natsir Fahrun, Muh. Flora Pasaru Hasriyanty Hasriyanty IRWAN LAKANI Kamariah Ria M. Hasyam Ashari Margaret Angelia Moh. Hibban Toana Mohammad Yunus Musdalifa Musdalifa Nur Edy Nur Khasanah Pajrin J Pasaru, Remalia Bulo Rosmini I Rosmini Rosmini Rusdam Muksin S, Ismail Suaib. Sitti Rahmawati Trisnawati, Eka Vinsensia Pato Wahyuniarsih, Desi Zainab Zainab