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AGROEKOTEKNOLOGI

agroekoteknologi
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Published by Universitas Sumatera Utara

ISSN : 23376597 EISSN : - DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Jurnal AGROEKOTEKNOLOGI merupakan jurnal ilmiah yang diterbitkan secara online berisikan hasil-hasil penelitian tentang hama dan penyakit tumbuhan, agronomi, pemuliaan tanaman dan ilmu tanah

Arjuna Subject : -

Articles 46 Documents

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Search results for , issue "Vol 3, No 2 (2015)" : 46 Documents clear

Pemberian Ekstrak Ganggang Cokelat (Sargassum polycystum) dan Bradyrhizobium japonicum untuk Meningkatkan Unsur Hara Nitrogen dan Produksi Tanaman Kedelai Ryrien Indriyati; Alida Lubis; Jamilah Jamilah
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

Tujuan penelitian ini adalah untuk mengetahui pengaruh pemberian ekstrak ganggang cokelat dan Bradyrhizobium japonicum serta interaksinya dalam meningkatkan hara nitrogen dan produksi tanaman kedelai. Penelitian dilaksanakan di Rumah Kasa dan Laboratorium Biologi Tanah Fakultas Pertanian USU pada Juni-Oktober 2014, menggunakan Rancangan Acak Kelompok (RAK) faktorial, dengan 2 faktor dan 3 blok. Faktor pertama adalah konsentrasi ekstrak ganggang cokelat yang terdiri dari 4 perlakuan (0, 10, 20 dan 30 % / polybag) dan faktor kedua adalah Bradyrhizobium japonicum yang terdiri dari 2 perlakuan (tanpa dan dengan Bradyrhizobium japonicum). Hasil penelitian menunjukkan bahwa pemberian ekstrak ganggang cokelat berpengaruh nyata meningkatkan jumlah dan bobot bintil akar, berat kering tajuk, bobot biji, dan serapan N tanaman, namun tidak berpengaruh nyata meningkatkan N total tanah. Pemberian Bradyrhizobium japonicum berpengaruh nyata meningkatkan jumlah dan bobot bintil akar dan berat kering tajuk, namun tidak berpengaruh nyata meningkatkan N total tanah, serapan N tanaman dan berat biji. Hasil terbaik diperoleh pada kombinasi konsentrasi ekstrak ganggang cokelat 20%.Kata kunci : ekstrak ganggang cokelat, Bradyrhizobium japonicum, nitrogen, kedelai

Respon Pertumbuhan dan Produksi Beberapa Mutan (M2) Kacang Hijau terhadap Pemberian Air 40% Kapasitas Lapang Agustina Suryani; Lollie Agustina P. Putri; Mbue Kata Bangun
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The aims of this research was to evaluate the response of the growth and yield of some mutants (M2) mungbean to water supply of 40% of field capacity. The research was carried out in greenhouse of Agricultural Faculty, University of North Sumatera, Medan, start from December 2013 till March 2014 with eight genotypes, A: is genotype of (F2R0C0), B: is genotype of (M2R1C0),C: is genotype of (M2R1C3), D: is genotype of (M2R2C0), E: is genotype of (M2R2C2), F: is genotype of (M2R3C0), G: is genotype of (M2R3C1), H: is genotype of (M2R3C2), at 40% of Field Capacity by using randomized block design. The treatment was repeated twice. Data were analyzed with ANOVA and continued with LSD. The result of research showed that the mutant genotype B (M2R1C0), E (M2R2C2), and F (M2R3C0) were significantly difference on seed weight per plant, genotype B (M2R1C0) and E (M2R2C2) were significantly difference on 100-seed weight, and genotype E (M2R2C2) was significantly difference on number of pods containingKeywords: Mung bean, mutant (M2), 40% of field capacity.

Uji Preferensi Hama Kepik Hijau Nezara viridula L. (Hemiptera:Pentatomidae) pada Tanaman Kacang Kedelai dan Kacang Panjang di Laboratorium Silvia Samosir; Marheni Sembiring; Syahrial Oemry
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The objectives of the research was to know the preferences of stink bug (N. viridula) on soybean plant and long bean in screenhouse. This research was conducted in the screenhouse Faculty of Agriculture University of Sumatera Utara from April until July 2014. This method used Block Randomized Design (BRD) nonfactorial with two treatments soybean and long bean, respectively with nine replications. The results showed that N. viridula prefer soybean than long bean. The highest number of adults N. viridula (10.17 head) on K1. The highest index attack percentage (83.95%), most attack symptoms, and the highest number of eggs N. viridula (31.56 grain) on soybean while the highest number of nymphs (9.67 head) on long bean.Key words: preferences, Nezara viridula, soybean, long bean.

Uji Efektivitas JamurMetarhizium anisopliae (Metch.) dan Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV) terhadap Larva Penggerek Tongkol Jagung Helicoperva armigera Hubner (Lepidoptera: Noctuidae) di Lapangan Debi Sabrina Ompusunggu; Syahrial Oemry; Lahmuddin Lubis
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The aim of this research was to know effective concentrationof M. anisopliae and HaNPV to Helicoperva armigera in the field. This research was carried out in Desa Tanjung Makmur Subdistrict Tandem Hulu 1 District Deli Serdang. This research used sampling random technique non factorial with seven treatments and four replications. They were the result showed that the highest larvae population was control (1.35) and the lowest was HaNPV 6g/liter of water (0.10). The highest of attacked intensity was control (38.75% ) and the lowest was HaNPV 6g/liter of water (2.50%). The highest production was HaNPV 6g/liter of water (261.09 g) and the lowest was M. anisopliae 4g/liter of water(234.45 g).Keywords : Helicoverpa armigera, Metarhizium anisopliae, Helicoverpa armigera Nuclear Polyhedrosis Virus (HaNPV).

Uji Patogenitas Jamur Cordyceps militaris L. terhadap Ulat Api (Setothosea asigna E.) (Lepidoptera : Limacodidae) di Rumah Kasa Leo Alvian Ginting; Syahrial Oemry; Lahmuddin Lubis
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

This study aims to study phatogenicity of C. militaris against S. asigna larvae in screen house. This study research using completely randomized design (CRD) nonfactorial with seven treatments and four replications, namely control, 10, 15, 20, 25, 30 and 35 grams C. militaris with corn media. The results showed that the application C. militaris in corn media was highly significant affected the mortality percentage of larvae S. asigna on obsevation four days after application and six days after the application. The highest mortality percentage on four days after application on C. militaris 35 gr (25%) and the lowest on C. militaris 10 grams (7.50%). The highest mortality percentage on six days after the application on C. militaris 35 grams, C. militaris 30 grams and C. militaris 25 grams (100%) and the lowest on C. militaris 10 grams (85%). Larvae S. asigna was infected by C. militaris suffered mimification and after afew days grow colonies colored white fungus (micelium) around the larva body.Keywords : Setothosea asigna, Cordyceps militaris, mortality percentage, corn media

Hubungan Persentase Serangan dengan Estimasi Kehilangan Hasil Akibat Serangan Hama Penggerek Buah Kopi Hypothenemus Hampei Ferr.(Coleoptera: Scolytidae) di Kabupaten Simalungun Rahutdin P Purba; Darma Bakti; Suzanna F Sitepu
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The objectives of the research was todetermine the relationship ofthe percentage of attackandestimateyield losses due toattack by coffee berryborer, HypothenemushampeiFerr. (Coleoptera: Scolytidae) inSimalungun district.This research used asurvey methodwith linear regression analysis between percentage of attack withpercentageloss of yield, regressionbetween the percentage of attack withpopulation densityand regressionbetweenpopulationdensity with percentageyield loss.The results showedthat thepopulationdensity ofpests onred fruithad asignificant relationship to thepercentageof yield lossin the red fruit,butthe percentage of attacksdid not havea significant relationship topopulation densityandthe percentage ofyield loss. The highestattack intensity(46.78%) wasin the DolokHuluanand the lowest(5.42%) wasin Bangun Saribu. The highest percentage of yield loss(17.25%) wasin SimpangHinalangand the lowest(8.45%) wasin BosiSinombah. The highestpopulationdensity(17.80) found inredfruitsand the lowest(6.32) was alsofound inred fruits.Keywords : coffee, percentage ofattack, Hypothenemus hampei Ferr.

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