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Studi Biologi Pleisispa reichi Chap. (Coleoptera: Crhysomelidae) di Laboratorium Darma Bakti; Rosmayati Rosmayati; Sufryiadi Sufryiadi
Jurnal Agrista Vol 13, No 1 (2009): Volume 13 Nomor 1 April 2009
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Biological Study of Pleisispa reichi Chap. (Coleoptera: Crhysomelidae) in LaboratoryABSTRACT. Pleisispa reichi is a mein pest of coconut in Indonesia. This beetle attacked the young leaves. The objective of this research id to know the biological aspect of this beetle on coconut leaves. This studies were conducted in Laboratory of plant pest and disease, Faculty of Agriculture, North Sumatera level. The result showed that female produced 43.40±9.86 eggs with hatching 80.77±6.95%. Larvae had 3 instars with duration 22.80±0.79 days. The age of pupae 5.30±0.71 days. While the age of female and male, 70.90±4.55 and 73.90±4.55 days, respectively. Copulation occurred when imagoes age 13-14 days. The length and wide size of eggs were 5.90±0.56 and 1.95±0.20 mm. The length larvae of instar 1, 2, and 3 were 4.05±0.37, 6.00±0.53, and 9.05±0.55 mm. While the width were 0.95±0.16, 1.35±0.24, and 1.85±0.24 mm. The measure of length and width of pupa were 8.75±0.49 and 1.80±0.26 mm. While the length and width size of male was 8.35±0.58 mm and 1.90±0.21 mm and the female was 9.75±0.54 mm and 2.20±0.26 mm. In life table showed that the net of reproduction rate (Ro) = 11.02. While the intrincic rate of reproduction (r) was 0.070 and Tc was 34.30. It means that the beetle had survival rate was 34.30%.

KAJIAN EPIZOOTIK Metarhizhium anisopliae PADA LARVA TRITIP (Plutella xylostella L.) (Lepidoptera: Plutellidae) DI RUMAH KACA Lamsihar O Simamora; Darma Bakti; Syahrial Oemry; Fatiani Manik
Jurnal Agroekoteknologi Vol 1, No 2 (2013)
Publisher : Universitas Sumatera Utara

Epizootic study of Metarhizium anisopliae against Larvae Tritip in greenhouse. The objective of this experiment to know the effectiveness of the mechanism of transmission of the fungi M. anisopliae by larvae tritip in greenhouse. The research was conducted in Greenhouse Crops Research Institute for Tropical Fruit Tongkoh-Berastagi. The research used non-factorial completely randomized design with 5 treatments and 4 replications, which were: control(without infected by M. anisopliae), 5 larvae are infected by (5g, 10g,15g, 20g)/100ml M. anisopliae are transmitted to 5 healthy larvae. The results showed that the concentration addition of each suspension fungi M. anisopliae increased the mortality of larvae infected directly by immersion, mortality is transmitted. The concentration addition of the suspension fungi M. anisopliae increased transmission between larvae infected directly immersion method to healthy larvae and can also reduce the intensity of the attacks tritip larvae. The highest percentage of larvae mortality infected directly immersion method was 52,5%. The highest percentage of transmitted larvae mortality was 32,5% . The highest percentage of entirely larvae mortality was 95% . The highest percentage of larvae was growed by fungi was 92,5%. The highest percentage of damage was 59.25%. Key words : Epizootic, biological control, Plutella xylostella L, Metarhizium anisopliae.

VIRULENSI NUCLEAR POLYHEDROSIS VIRUS (NPV) TERHADAP ULAT GRAYAK (Spodoptera litura F.) (Lepidoptera : Noctuidae) PADA TANAMAN TEMBAKAU DELI DI RUMAH KACA Ade Sartika Rimadhani; Darma Bakti; Maryani Cyccu Tobing
Jurnal Agroekoteknologi Vol 1, No 3 (2013)
Publisher : Universitas Sumatera Utara

Spodoptera litura (Lepidoptera : Noctuidae) is one important of pests on Deli tobacco. This researchwas study the virulence of Nuclear Polyhedrosis Virus of larvae S. litura on Deli tobacco inGlasshouse. This research was carried out at Central Research Deli Tobacco Sampali PTPN IIMedan from May to September 2012. The method of this research was Randomized CompleteDesign Factorial which consists stages of larvae (2nd and 4th instar) and the number of virussuspenses (10, 20, and 30 larvae infected virus/1 l water) with three replications. The results showedthat highest percentage mortality (91.67%) was found in treatment 2nd instar with suspense 30 larvaeinfected virus/1 l water and the lowest percentage (0%) on control. The highest percentage ofdamage intensity (33.06%) was control and the lowest percentage (15.58%) on suspense 30 larvaeinfected virus/1 l water. The fastest incubation period in the treatment 4th instar are I.67 days andsuspense of 30 larvae infected virus/1 l water are 1.83 days and the lowest in the treatment 2nd instarare 2.58 days and control didn’t showed symptoms infection.Keywords : Spodoptera litura, NPV, virulence

KEANEKARAGAMAN ARTHROPODA PADA TANAMAN JAGUNG TRANSGENIK Daniel T Tambunan; Darma Bakti; Fatimah Zahara
Jurnal Agroekoteknologi Vol 1, No 3 (2013)
Publisher : Universitas Sumatera Utara

Biodiversity of arhtropoda on the transgenic corn. The objective of this research was to studyinfluence of variety introduction of varieties arthropoda in transgenic corn. This research was takenat Balai Benih Tanaman Palawija, Kelurahan Tanjung Selamet, Medan start on March 2012 untilMay 2012. This research used 3 design traps of insect (pitfall trap, sweep net, sticky trap),andrepeated three times. The result of research showed that the highest insect value was caught insweet corn area was consist of 9 ordo, 23 family and 31 species and the lowest insect value intransgenic corn area was consist of 9 ordo, 22 family and 31 species. The highest relative frequencyvalue in sweet corn area was 11.4482 % and the lowest was 0.1718 %. The highest relativefrequency value in transgenic corn area was 18.6597 % and the lowest was 0.0343 %. The highestaccuraty relative value in sweet corn area was 4.2858 % and the lowest was 1.4286 %. The highestaccuraty relative value in transgenic corn area was 3.9473 % and the lowest was 1.3157 %.Shanon-Weiner (H’) Index varieties value of insect highest in sweet corn area is 2.8995 (medium),and in the transgenic corn area was 2.6455 (medium).Keywords : biodiversity. Arthropoda. transgenic Corn

PENGGUNAAN PERANGKAP KUNING BERDASARKAN BENTUK DAN BEBERAPA KETINGGIAN PERANGKAP TERHADAP HAMA Liriomyza spp. (Diptera: Agromyzidae) PADA TANAMANBAWANG MERAH (Allium ascalonicum L.) Rio A A Sinubulan; Darma Bakti; Mena Uly Tarigan
Jurnal Agroekoteknologi Vol 1, No 4 (2013)
Publisher : Universitas Sumatera Utara

Yellow traps is one of mechanical control leaf miner (Liriomyza spp) on shallolt(Allium ascalonicum (L.). This study was conducted in Desa Batukarng located at the altitude of about1,100 meters above sea level.The purpose of this study was to fine out the influence of the use severalforms and altitude of yellow. Trap on Liriomiza spp ( leaf-slitting fly) as the pest on shallot(Allium ascalonicum (L.). This study employed the Non-Factorilal Group Random Design Methodwith 7 treatments and 3 repetitions by using yellow square and cylindrical trap set at the latitude of10,30,50 cm above the ground. The result of this study showed that the average number of pets trappedhad a significant influence on the population of Liriomyza spp ( leaf-slitting fly) at shallot plantingground of square treatment with height of 10 cm. The form and height of trap had a very significantinfluence on percentage of Liriomyza spp attack to the square treatment with the height of 10 cm.Based on the result of the study, it is found out the square trap with the height of 10 cm is moreeffective to control the population of Liriomyza spp.Key words: shallot , leaf- slitting, yellow trap.

DAYA PREDASI Rhynocoris fuscipes F. (Hemiptera:Reduviidae) TERHADAP ULAT API Setothosea asigna E. (Lepidoptera:Limacodidae) DI LABORATORIUM Edi Kembaren; Darma Bakti; Lahmuddin Lubis
Jurnal Agroekoteknologi Vol 3, No 1 (2015)
Publisher : Universitas Sumatera Utara

ABSTRACTThe Ability of Rhynocoris fuscipes F. (Hemiptera: Reduviidae) to nettle caterpillar Setothoseaasigna E. (lepidoptera: limacocidae) as a predator in the laboratory, it was under supervised byProf. Dr. Ir. Darma Bakti, MS. and Ir. Lahmuddin Lubis, MP. The research was to know the abilityof R. fuscipes to Setothosea asigna. The research was held at the Insect Laboratory, Faculty ofAgriculture, University of Sumatera Utara, Medan from April to Juni 2013. It was arranged byCompletely Randomized Design with 6 treatments and four replications, respectively. The total ofpredator againts nettle caterpillar Sethotosea asigna are: R0 (0:8),R1 (2♂:8 ), R2 ( 2♀:8 ) R3,(♂♀:8 ) ,R4 ( 2♂♀:8), R5 (3♂♀:8). The parameters which observed were the mortality persentageof S. asigna caused by predator R. fuscipes and how to consumed. The result showed that the mosteffective treatment is R5, R4, R3, R2, R1 and R0 at a stretch. The matter is shown from the fastest ofability kill of 8 S. asigna that tested is R5 (10 days) and followed by R4, R3, R2, R1, R0.Keywords : Rhynocoris fuscipes F. and Nettle caterpillar setothosea asigna E

DAYA PREDASI Rhynocoris fuscipes F. (Hemiptera:Reduviidae) TERHADAP ULAT API Setothosea asigna E. (Lepidoptera:Limacodidae) DI LABORATORIUM Edi Kembaren; Darma Bakti; Lahmuddin Lubis2
Jurnal Agroekoteknologi Vol 2, No 2 (2014)
Publisher : Universitas Sumatera Utara

ABSTRACTThe Ability of Rhynocoris fuscipes F. (Hemiptera: Reduviidae) to nettle caterpillar Setothoseaasigna E. (lepidoptera: limacocidae) as a predator in the laboratory, it was under supervised byProf. Dr. Ir. Darma Bakti, MS. and Ir. Lahmuddin Lubis, MP. The research was to know the abilityof R. fuscipes to Setothosea asigna. The research was held at the Insect Laboratory, Faculty ofAgriculture, University of Sumatera Utara, Medan from April to Juni 2013. It was arranged byCompletely Randomized Design with 6 treatments and four replications, respectively. The total ofpredator againts nettle caterpillar Sethotosea asigna are: R0 (0:8),R1 (2♂:8 ), R2 ( 2♀:8 ) R3,(♂♀:8 ) ,R4 ( 2♂♀:8), R5 (3♂♀:8). The parameters which observed were the mortality persentageof S. asigna caused by predator R. fuscipes and how to consumed. The result showed that the mosteffective treatment is R5, R4, R3, R2, R1 and R0 at a stretch. The matter is shown from the fastest ofability kill of 8 S. asigna that tested is R5 (10 days) and followed by R4, R3, R2, R1, R0.Keywords : Rhynocoris fuscipes F. and Nettle caterpillar setothosea asigna E

POTENSI JAMUR ENDOFIT ASAL CABAI SEBAGAI AGENS HAYATI UNTUK MENGENDALIKAN LAYU FUSARIUM (Fusarium oxysporum) PADA CABAI DAN INTERAKSINYA Sri Endah Nurzannah; Lisnawita Lisnawita; Darma Bakti
Jurnal Agroekoteknologi Vol 2, No 3 (2014)
Publisher : Universitas Sumatera Utara

This research aims to find endophytic fungi which potency as biocontrol agents to against Fusariumoxysporum on chili and their interaction. The research was conducted at Plant Disease Laboratory,Agroecotechnology Program Study, Faculty of Agriculture, University of Sumatera Utara andgreenhouse of plant quarantine, Medan from May to August 2013. It was done by using CompletelyRandomized Design (CRD) Non Factorial with fourteen treatments and three replications. Theresults showed all the endophytic fungi used (Rhizopus sp., Penicillium sp., Rhizoctonia sp.,Aspergillus sp., Hormiscium sp., Geotrichum sp.) potential as biological agents to control fusariumwilt on chilli. The best results obtained on Penicillium sp. with disease severity was 2.78% in thegreenhouse test . Penicillium sp. also able to improve plant growth with plant height 29.40 cm.Key words : chilli, Fusarium oxysporum, endophytic fungi, interaction

Keanekaragaman Jenis Serangga Pada Beberapa Varietas Jagung Hibrida dan Jagung Transgenik Selamat Ariyanto Gulö; Darma Bakti; Fatimah Zahara
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

The objective of this research was to studythe abundance and diversity of insects on corn hybrid andtransgenic variety. It was conducted at Balai Benih Induk Tanaman Palawija Tanjung Selamat landarea dan Pest Laboratory, Facultyof Agriculture, University of North Sumatra, Medan started onMarch 2013 until Juli 2013. This research used 3 kinds of insect traps (Sweep Net, PitfallTrap,Yellow Sticky Trap), and six study replications. The first treatment varieties planted PRG NKC7-603 are sprayed with Glyphosate, the second treatment varieties PRG NK C7-603 are weededmanually, the third treatments varieties C7 were weeded manually, and the fourth treatmentvarieties DK979 were weeded manually.The result showed that insect caughthas consisting of 9Ordo and 49families. The highest relative density values on PRG C7 NK-603 (application ofglyphosate) was 16,5 % and the lowest was 0,136 %. The highest relative density values on PRGC7 NK-603 was 16,16 % and the lowest was 0,116 %. The highest relative density values on C7was 17,114 % and the lowest was 0,0781 %. The highest relative density values on DK979 was18,4 % and the lowest was 0,138 %.Shanon-Weiner (H’) index diversity of insect on PRG C7 NK-603 (applicationof glyphosate) was 3,2636, on PRG C7 NK-603 was 3,2407, on C7 was 3,1834,and on DK979was 3,144.All varieties has a high diversity and ecosystem stability.Key words : Diversity, Insect, Corn

Metil Bromida (CH3Br) Sebagai Fumigan Hama Gudang Areca Nut Weevil (Araecerus fascicullatus De Geer) (Coleoptera : Anthribidae) Pada Biji Pinang Nirza Okta Yudistira; Darma Bakti; Fatimah Zahara
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

This research aimed to know the apropriate concentration for controlling A. fasciculatus on severaldose and time exposure. This research was conducted in shading house of agriculture quarantinemain centre, Belawan Gedung Johor, ± 25 m above sea level, started on February to April 2014.This research used randomized complete design, with two factors and three the replicate, firts factorwas replication dose of Methyl Bromide (0 g/m3, 24 g/m3, 32g/m3and 40 g/m3) and second wastimeexposure ( 2 hours, 4 hours and 12 hours). The result showed that dose and time exposure of MethylBromide so significantly affected to mortality percentage, as well as interaction between twofactors. The best result showed on D3 (dose 40 g/m3) with mortality rate 85,16% and T3 (exposuretime 6 hours) with mortality rate 51,09%.Keywords :Fumigation, A. fascicullatus, Methyl Bromide, Areca nut

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