B. Sengli J. Damanik
Universitas Sumatera Utara

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PENGGUNAAN EKSTRAK BIJI PINANG UNTUK MENGENDALIKAN HAMA KEONG MAS (POMACEA CANALICULATA LAMARCK) PADA TANAMAN PADI Yunidawati, Wiwik; Bakti, Darma; Damanik, B. Sengli J.
Jurnal Ilmu Pertanian KULTIVAR Vol 5, No 2 (2011)
Publisher : Jurnal Ilmu Pertanian KULTIVAR

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Abstract

Aplikasi ekstrak pinang dapat digunakan untuk mengendalikan hama keong mas pada tanaman padi. Tujuan penelitian ini adalah mendapatkan konsentrasi ekstrak pinang yang efektif pada populasi keong mas tertentu. Penelitiaan dilaksanakan pada bulan Desember 2010 sampai dengan April 2011 di Rumah Kasa Laboratorium Pengamatan Hama Penyakit Tanaman dan Agens Hayati Tanjung Morawa di UPT Balai Benih Induk Padi Murni Tanjung Morawa Kabupaten Deli Serdang Sumatera Utara. Metoda penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial yang terdiri dari 2 (dua) faktor dengan 3 (tiga) ulangan. Faktor pertama adalah Ekstrak pinang  yang terdiri dari 4 (empat) taraf yaitu tanpa ekstrak pinang, 30 cc dan 40 cc/l air ekstrak pinang. Faktor kedua adalah populasi keong emas terdiri dari 4 (empat)  taraf (tanpa keong mas, 8, 16 dan 24 ekor keong mas/16 m2.  Pengendalian hama keong mas terbaik dijumpai pada pemberian ekstrak pinang sebanyak 40 cc/l air. Adapun jumlah populasi keong mas yang diinvestasikan pada tanaman padi memberi pengaruh terhadap persentase tanaman terserang, sehingga menyebabkan jumlah anakan per rumpun menurun. Perlakuan ekstrak pinang dan jumlah keong mas yang diinvestasikan pada tanaman padi,  tidak menunjukkan hubungan yang nyata terhadap  jumlah anakan per rumpun. Kata kunci: ekstrak pinang, keong mas, tanaman padi, kontrol.
POPULATION DYNAMICS OF MYZUSPERSICAE (SULZER) ON INTERCROPPING POTATOES WITH OTHER PLANTS ON KARO HIGHLAND Sidauruk, Lamria; Bakti, Darma; Damanik, B. Sengli J.; Kuswardani, Retna Astuti
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 1 (2013): Life Sciences
Publisher : Syiah Kuala University

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Abstract

Green peach aphid (MyzuspersicaeSulze) represents one of the major pest affecting decreased production which found in different potato fields in Karo highland. Decreasing incurredin two ways: the direct damages that are caused by the insectfeeding on the plants and the indirect damages caused to potato planting materials as a virus vector. There are different methods for controlling green peach aphids, all of them relying inthe use of chemicals and this method makes food production contaminated by pesticide residu. So, using non-chemical methods of cultivation contribute to ?ecological? food production.Intercropping is one way of reducing pest insect populations in such vegetable crops.This study was conducted to determine the population dynamics of Myzuspersicae (Sulzer) on Intercropping system of potato plant with other vegetables plant on Karo Highland. The host plant was cultivar Granola of potato and the intercropping plant respectively were cabbage, mustard, celery, onions, carrot and bean. The results showed that M. persicae was consistently at different densities in different intercropping plant on potato. The aphid was first recorded at three week until planting. The kind of inter cropping culture plants significantly reduced the number of aphid. The lowest number of aphid found respectively inintercroppingpotatoesandmustard, potatoesandonions, andpotatoesandcelery. There was 0.80 aphids /leaf, 1,12aphids/leaf, 1,48 aphids/leaf. At the 2nd observation found the number of aphid was lowest atpolyculture potatoes and mustards were 1,68 aphid/leaf, at popatoes and onions were 3,28 aphid/leaf, at popatoes and celery 3,00 aphid/leaf. The number of aphids steadily increased with significant at differencesintercroppingplant till the 3rd observation (9 weeks until planting) respectively where 2,80aphid/leaf, 3,42 aphid / leaf and 4,20 aphid/leafwere recorded. Observation for natural enemies of M. persicaeshowed that fewnatural enemiesfound in theagro-ecosystem. There are Episyrphusbalteatus, Chrysoperlacarnea, phidiusmatricarieae and Coccinellaseptempunctata. The population density of all of the natural enemies was highest at polyculture than monoculture of potato. After that, as the population of M. persicae started decline, the same trend was followed by all of its natural enemies.
PERTUMBUHAN DAN HASIL TIGA VARIETAS PADI GOGO PADA PERLAKUAN PEMUPUKAN Nazirah, Laila; Damanik, B. Sengli J.
Jurnal Floratek Vol 10, No 1 (2015): April 2015
Publisher : Program Studi Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala

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An effort to anticipate a food crisis is to increase food production by planting upland rice in dry lands. In addition, provision of appropriate fertilizer has great potential for strengthening food self-sufficiency and for future agricultural development. The study was aimed at determining growth and yield of three varieties of upland rice under a compound fertilizer. The experiment was arranged in split plot design, consisting of three upland rice varieties and three levels of compound fertilizer. The main plot was upland rice varieties, i.e. Inpago 4, Inpago 5, and Inpago 8, while the subplot was compound fertilizer, i.e. a dose of 0 kg/ha, 150 kg/ha, and 250 kg/ha. Results showed that varieties significantly affected plant height, panicle numbers, and panicle length, but did not significant affect weight of 1000 grains and dried grain. Inpago 4 was the best variety. The best of NPK fertilizer was found at dose of 250 kg/ha.