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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 943 Documents

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Parasitisasi dan Kapasitas Reproduksi Cotesia flavipes Cam. (Hymenoptera: Braconidae) pada Beberapa Jumlah dan Ukuran Larva Chilo sacchariphagus Boj. (Penggerek Tebu Bergaris) (Lepidoptera: Crambidae) di Laboratorium Poppy Margaretha Siregar; Suzanna F Sitepu; Hasanudin Hasanuddin
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The objectives of this research was to study the parasitization and reproduction capacity ofCotesia flavipes Cam. (Hymenoptera: Braconidae) on different number and size of larvaeChilo sacchariphagus Boj. larvae (Lepidoptera: Crambidae). The research was conducted at theLaboratory of Sugarcane Research and Development Sei Semayang, Binjai, North Sumatera fromMay until June 2014. This method used Randomized Complete Design with two factors. The firstfactor was numbers of larvae Chilo sacchariphagus (1, 2 and 3) and the second factor was sizeof C. sacchariphagus (small, medium and large) with three replications.The results showed thatsize from larvae C. sacchariphagus significantly effected the percentage of parasititation.The highest percentage of parasititation (77.78%) on big larvae (2-2.5cm) and the lowest (37.33%)on the medium larvae (1.5-2cm). The day of cocoons formed were between 16-18 days. Sex ratio ofmale (41.13%) and female (58.86%) with ratio was 1 : 1.43.Keywords : parasitization, Cotesia flavipes, Chilo sacchariphagus, host size.

Pertumbuhan dan Produksi Jagung Genotip PRG C7, Varietas C7 dan DK 979 dengan Metode Pengendalian Gulma yang Berbeda Josef Edison Lumbantoruan; Meiriani Meiriani; Lollie Agustina P Putri
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The aim of this research was to know the response in growth and yield of maize PRG C7 genotype,C7, and DK 979 variety under different methods of weed control. The research had been conductedat Balai Benih Induk Tanaman Palawija, Sunggal District, North Sumatera on November 2013-Maret 2014 by using a randomized block design non factorial with four treatments (maize PRG C7genotype sprayed with glyphosate, PGR C7 genotype with manual weeding, C7 variety withmanual weeding, and DK 979 variety with manual weeding) and four replications. The resultsshowed that different weed control methods provide no significant effect on the growth of cornPRG C7 genotype, C7 and DK 979 varieties, that production of maize DK 979 variety withmanually weeded significantly larger than C7 maize variety with manually weeded such parametershusks cob weight, unhusks cob weight and number of seeds percob, glyphosate aplication andmanual weeding to maize PRG C7 genotype hadn’t showed the difference to the growth andproduction.Keywords : genotype, variety, glyphosate tolerant, weed control, maize

Respons Dosis Biotip Rumput Belulang (Eleusine Indica L. Gaertn) Resisten-Glifosat Terhadap Glifosat, Parakuat Dan Indaziflam Satria Parlindungan Dalimunthe; Edison Purba; Meiriani Meiriani
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

Goosegrass (Eleusine indica) is one of weeds commonly found in oil palm plantation of which isgetting more difficult to control with glyphosate during the last few years in Adolina Estate, PTPNIV. This research aims to determine the dose response and level of resistance of the glyfosatresistenpopulation to paraquat, glyphosate, and indaziflam. The rates of glyphosate applied were 0,60, 120, 240, 480, 960, 1920 g a.i. ha-1; paraquat at 0, 50, 100, 200, 400, 800, 1600 g a.i. ha-1 andindaziflam at 0, 12,5, 25, 50, 100, 200, 400 g a.i. ha-1. The treatments were arranged in randomisedblock design (RBD) and each treatment was made in three replicates. The results showed that theputative glyphosate-resistant population collected from Adolina Estate was resistant to glyphosateand paraquat is the survival of resistant-glyphosate was 100 % at 480 g a.i glyphosate/ha and 86,7% at 400 g a.i paraquat/ha. The level of resistance to glyphosate and paraquat were 7,5 and 5,5 foldof the susceptible population respectively. Meanwhile, indaziflam controlled satisfactorily thispopulationKeywords: Glyphosate, Paraquat, Indaziflam, Eleusine indica, Resistance

Efektifitas Beberapa Teknik Pengendalian Setothosea asigna pada Fase Vegetatif Kelapa Sawit di Rumah Kaca Marjan Sinaga; Syahrial Oemry; Lisnawita Lisnawita
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The aim of research was to get an effective control technique to control Setothosea asigna onvegetative phase of palm oil in greenhouse. The research was held at Greenhouse of AgricultureFaculty University of Sumatera Utara, Medan since April – May 2014. The method of this researchwas Completely Randomized Design Non Factorial with seven treatments, M0 (control), M1 (2gram MNPV/ litre of water), M2 (Bacillus thuringeensis with concentration 7.5%), M3 (neem leafextracts with concentration 4%), M4 (Forficulla auricularia three pairs), M5 (insecticidedeltametrin with concentration 3%) and M6 (insecticide dimetoat with concentration 1%)respectively with four replications. The parameters are the percentage of mortality, symptoms deathof pests and time death of pest. The result showed that insecticide deltametrin most effective thanthe others with percentage of mortality 100% at 4 days after application. The fastest time death ofimago was 1.63 day after application with symptoms body of S. asigna was white like milk.Keywords: control technique, Setothosea asigna, mortality, time death

Evaluasi Sifat Kimia Tanah pada Lahan Kopi di Kabupaten Mandailing Natal Wilson Wilson; Supriadi Supriadi; Hardy Guchi
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

This research purposed to evaluate soil chemistry characteristic on coffee land in Mandailing NatalRegency and to know the relationship of soil chemistry characteristic to production which held oncoffee land in Mandailing Natal Regency, Research and Technology Laboratory Agriculture FacultyNorth Sumatra University and Soil Biology Laboratory Agriculture Faculty North Sumatra University.Data is obtained by survey system and data sample is gotten expressly (Purposive Random Sampling)with six parametres i.e. pH, Organic Carbon, Total Nitrogen, Available Phosphate, Cation ExchangeCapacity, and Base Saturation. Data is tested by using assumption classic test i.e. outlier test,normality, linearity, correlation analyze and quadratic regression. The research result show that soilchemistry characteristic is not obviously relationship to production.Keyword : soil chemistry characteristic, coffee production, regression

Pengaruh Pupuk Urea dan Interval Panen Terhadap Pertumbuhan dan Produksi Kangkung Air (Ipomoea aquatica Forsk.) Yoseph Marthin Sibarani; JA Napitupulu; Ratna Rosanty Lahay
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The demand for water spinach is increasing but this commodity is not cultivated intensively. Theexperiment aims was to know the optimal interaction of harvest interval and application urea toincrease and maintain production of water spinach. Research was conducted to determine theoptimal effect of application urea and harvest interval to the regrowth and production of waterspinach at Tanjung Raya street, Medan Helvetia on January-June 2014 using split plot design withtwo factors, the factors were dose of urea (0;25;50;75g/plot/season) and harvest interval (every 8,10, 12 days after the first harvest). The parameters observed were shoots numbers, shoots length,primary and secondary branches number, fresh weight, consumable fresh weight per sample andproduction per plot. The results showed that the application urea with 75g/plot/season is better than0, 25 and 50 g/plot/season at the same time harvest interval treatment with 8 days is better than 10and 12 days after the first harvest.Key words : water spinach, urea, harvest interval.

Respons Pertumbuhan dan Produksi Bawang Sabrang (Eleutherine americana Merr.) Terhadap Waktu dan Dosis Aplikasi Arang Sekam Marianus Sitepu; Haryati Haryati; Ferry Ezra Sitepu
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

Using traditional medicine growing rapidly lately. One of medicinal plant that have been developedis sabrang shallot (Eleutherine americana Merr.) This research aims for getting the best time anddose application of sabrang shallot. The researched was carried out at Field Trials of AgricultureFaculty North Sumatera University ( ± 25 m dpl) on May-October 2014, using a FactorialRandomized Block design with two factors are time aplication (2 weeks before planting, 1 weekbefore planting and when planting) and dose application of husk (1,5; 3; 4,5; 6 kg/plot or 10, 20, 30,40 ton/ha) by three replication. Data were analized with ANNOVA and continued with DuncanMultiple Range Test (DMRT). The parameters observed were age sprouts, plant height, number ofleaves, age flowering , number of tillers, number of bulbs per sample, wet bulbs weight per sample.The results of research shows that time and dose application of husk were significantly differ forplant height, number of leaves and number of sprouts.Key words : Time application, dose of husk , sabrang shallot.

Hubungan Ketinggian Tempat Dan Kemiringan Lereng Tehadap Produksi Kopi Arabika Sigarar Utang Di Kecamatan Lintong Nihuta Leonard Sihite; Posma Marbun; Supriadi Supriadi
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The purpose of the study was to know the location with the highest production of arabicca coffee(Coffea Arabica) in Lintong Nihuta regency of Humbang Hasundutan. The study was done withcorelating map of place height, map of slope, map of ground tipe. After overlaying map of groundtipe, elvation, and slope it was found 31 SPT (set of land) with the scale 1 : 25.000. The populationof the research is coffee tree in the study field. Sum of point of sampling for coffee trees are 390sample points. The result of data analysis showed the higest sum of ripe seed coffe production atSiponjot village as SPL (set of land) 12 and the lowest sum of ripe seed coffee production atPargaulan village as SPL 3. The highest weight production of ripe seed coffee production atSiponjot village as SPl (set of land) 12 and the lowest weight production of ripe seed coffeeproduction at Lobutua Village as SPL 2. The highest weight production of dry seed coffee atSibuntuon Parpea as SPL 8 and the lowest weight production of dry seed coffee at PargaulanVillage as SPL 3.Keywords : Height Place, Slope, Coffee Production

Uji Suspensi Kitosan untuk Mengendalikan Rayap (Coptotermes curvignathus Holmgren) pada Tanaman Karet di Lapangan Mangaraja Lumban Gaol; Syahrial Oemry; Yuswani Pangestiningsih
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The aim of the research was to get effective concentration of chitosan suspension to controltermites (Coptotermes curvignathus) on the rubber plants in the field. This research was conductedin experiment field at Sungei Putih Research Centre since March until June 2014. This researchused Randomized Block Design Non Factorial with 6 treatments, 0, 6, 12, 18, 24 and 30 g whichapplicated with bait and three replications. The result showed that the highest percentage (100%)of termites mortality was 18 g treatment and the lowest (18.67%) at control treatment five day afterapplication. The symptoms infection of chitosan was characterized by discoloration of the abdomenwhich beginning white to blackish brown.Keywords : termites, chitosan, bait

Identifikasi Gulma Resisten Herbisida Paraquat Pada Lahan Jagung di Kecamatan Tigabinanga Kabupaten Karo Kristian Adinata Ginting; Edison Purba; Jonis Ginting
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

Paraquat is a herbicide commonly used for weed control in corn fields at Tigabinanga Subdistrict(TS), Karo District North Sumatera.The aim of this research was to identify paraquat resistant weedspecies (Echinochloa colonum and Eleusine indica) in corn fields at TS. This research consist of 3steps: seed collection, screening of paraquat resistant weed biotypes, and dose response test. Seed ofputative paraquat resistant biotypes were randomly collected from 28 corn fields in TS. Atscreening test, paraquat at the rate of 150 g a.i./ha was evaluated against weed populations to findresistant and susceptible biotypes. The experiment was performed in a randomized block designwith three replications. Dose response test was arranged in a randomized block design and fourreplications with eight levels of paraquat dose (0, 25, 50, 100, 200, 400, 800, 1600 g a.i./ha). Theresults showed that none of E. colonum TS population was resistant to paraquat whereas E. indicaTS populations were 2 population resistant, 4 population moderate resistant, and 21 populationsusceptible to paraquat. Resistant index of Benjire Village (ETB-14) and Perlamben Village (ETB-19) biotype were >5 and >9 times of susceptible population.Key words: paraquat-resistant, E. colonum, E. indica

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