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Keanekaragaman Jenis Serangga Di Berbagai Tipe Lahan Sawah Anna Sari Siregar; Darma Bakti; Fatimah Zahara
Jurnal Agroekoteknologi Vol 2, No 4 (2014)
Publisher : Universitas Sumatera Utara

The objective of this research was to study the diversity of insects on corn, snake and rice and toknow the kind of insect diversity in various type of farms rice field. This research was conductid atKampung Susuk dan Pest Laboratory Faculty of Agriculture, University of North Sumatra, Medan,started in January 2014 until Februari 2014. This research used 3 kinds of traps insect (Sweep Net,Pitfall Trap, Light Trap).The result of research showed that each insect caught consisted of 6 Ordoand16 families in corn with the highest relative density values was 7,69% and the lowest was4,61%, the highest relative density values in rice is 20,8 % and the lowest was 12,5%, the highestrelative density values in snake was 12.1% and the lowest was 9,75%. Shanon-Weiner (H’) indexdiversity value of insect in corn was 2,368 (medium), in rice was 1,822(medium) and in snake was2,258 (medium).Keywords :Diversity, Insect, Farm Type Rice Field

Pengaruh Nisbah Kelamin Parasitoid Cotesia flavipes Cam. (Hymenoptera : Braconidae) dan Ukuran Panjang Inang Chilo sacchariphagus Boj. (Lepidoptera : Crambidae) terhadap Fekunditas yang Dihasilkan di Laboratorium Andrico Tampubolon; Marhenit Marheni; Darma Bakti
Jurnal Agroekoteknologi Vol 3, No 1 (2015)
Publisher : Universitas Sumatera Utara

The objective of the research was to study the effect of sex ratio Cotesia flavipes and the length hostof C. sacchariphagus on the resulting fecundity. The research was conducted at the Laboratory ofSugarcane Research and Development Sei Semayang, Binjai, Medan, North Sumatera from Marchuntil May 2014. This method used Randomized Complete Design Factorial with two factors.The first factor was sex ratio of C. flavipes (0 male : 1 female ; 1 male : 1 female ;1 male : 2 females ; 1 male : 3 females ; 1 male : 4 females) and the second factor was size ofC. Sacchariphagus (<1.5 cm ; >1.5 cm - < 2.0 cm ; > 2.0 cm ) with three replications.The resultsshowed that the percentage of parasititation depend on host size of C. sacchariphagus. The highestpercentage of parasititation (40%) was on the big size of C. sacchariphagus (> 2.0 cm) and thelowest (0%) was on the small size of C. sacchariphagus (<1.5 cm). Sex ratio significantly effectedon the number of female C. flavipes. The highest number of female C. flavipes (13.11 head) on1 male : 4 females and the lowest (0 head) on 1 female : 0 male. Sex ratio of male and femalewas 2.48 : 1.Keywords : Cotesia flavipes, host size, sex ratio, Chilo sacchariphagus

Yonathan Alfonso Situmorang, Darma Bakti*, Hasanuddin Yonathan Alfonso Situmorang; Darma Bakti; Hasanudin Hasanuddin
Jurnal Agroekoteknologi Vol 3, No 1 (2015)
Publisher : Universitas Sumatera Utara

Metarhizium able to control variable growth phase of insect, such as egg, larvae, pupae, and adult.Effect of fungicide on Metarhizium is rarely reported. This research aims to determine impact offungicide to fungal colony growth of Metarhizium anisopliae (Metch) Sorokin. Conducted at PlantPathology Laboratory, Agriculture Faculty, University of North Sumatera, from August untilNovember 2013. Arranged non-factorial completely randomized design with twenty one treatmentsand three replications. Petridish contained 1 ml fungicide + 9 ml PDA, used one point technic,incubated at room temperature. The result showed that fungicide effect toward fungal colonygrowth of Metarhizium anisopliae (Metch) Sorokin. Highest fungal colony diameter was on 1.000ppm Mankozeb 80 WP which reached 7.67 cm, meanwhile lowest fungal colony diameter was on20.000 ppm Tebukonazol 25 WP which reached 0.88 cm. Highest fungal colony extensive was on1.000 ppm Mankozeb 80 WP which reached 45.23 cm2, meanwhile the lowest fungal colonyextensive was on 20.000 ppm Tebukonazol 25 WP which reached 0.53 cm2.Keywords : Metarhizium anisopliae, fungicide, biological agent.

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.

Keanekaragaman Jenis Serangga pada Pertanaman Coffea arabica L. Setelah Erupsi Abu Vulkanik Gunung Sinabung di Kabupaten Karo Harun Bonael Nainggolan; Darma Bakti; Marheni Sembiring
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

Penelitian ini bertujuan untuk mengetahui jenis, kerapatan dan frekuensi kehadiran serta indeks keanekaragaman serangga di lahan pertanaman Coffea arabica L. yang terkena erupsi. Penelitian dilaksanakan di 3 desa (Desa Lingga, Desa Ndokumsiroga, Desa Perteguhan), Kecamatan Simpang Empat, Kabupaten Karo dan 1 desa (Desa Lae Parira), Kecamatan Lae Parira, Kabupaten Dairi dan Laboratorium Hama Tumbuhan, Fakultas Pertanian, Universitas Sumatera Utara, Medan pada bulan Agustus sampai Oktober 2015. Penelitian ini menggunakan 4 teknik perangkap serangga (sweep net, pitfall trap, yellow sticky trap dan handpicking), dan diulang sebanyak 4 kali. Hasil penelitian menunjukkan serangga yang tertangkap pada lahan terkena erupsi terdiri dari 11 ordo dan 34 famili. Famili dengan nilai kerapatan mutlak tertinggi sebesar 1762, terendah sebesar 2, nilai kerapatan relatif tertinggi sebesar 43.93%, terendah sebesar 0,05%, niai frekuensi mutlak tertinggi sebesar 4, terendah sebesar 2, nilai frekuensi relatif tertinggi sebesar 3,54% yang terendah sebesar 1,77% dan indeks keanekaragaman Shanon-Weiner (H’) 1,98 (sedang). Sedangkan pada lahan tidak terkena erupsi terdapat 11 ordo dan 40 famili. Famili pada lahan tidak terkena erupsi mempunyai nilai kerapatan mutlak tertinggi sebesar 1056, yang terendah sebesar 5. Nilai kerapatan relatif tertinggi sebesar 34,30%, terendah sebesar 0,16%, nilai frekuensi mutlak tertinggi sebesar 4, terendah sebesar 2, nilai frekuensi relatif tertinggi sebesar 2,82%, terendah sebesar 1,41%, dan nilai indeks keanekaragaman serangga sebesar 2,33 (sedang).

Insect Molecular characterization ElaeidobiuskamerunicusFaust. (Coleoptera; Curculionidae) Origin North Sumatra Method Using Amplified Fragment Length Polymorphism (AFLP) muhammad riza fahlevi; Darma Bakti; Suzanna Fitriany Sitepu
Jurnal Agroekoteknologi Vol 5, No 4 (2017)
Publisher : Universitas Sumatera Utara

Elaeidobius kamerunicus introduced to Indonesia in Palm Research Center, Marihat. It is one pollinator to pollinate palm. Genetic changes in these insects cause a decline in palm oil production. The purpose of this study to determine the genetic diversity of it based molecular analysis techniques AFLP using three primers. Primers used are HEX (EcoR1 ACA - Mse1 CTT), FAM (EcoR1 AGG - Mse1 CAG) and FAM (EcoR1 AGG - Mse1 CTT). Analysis of genetic diversity using the MEGA program version 6. Phylogenetic tree using 'Neighbor-Joining Tree'. AFLP amplification product to 42 samples of genomic it and 3 Sitophilus oryzae genomic sample as a control showed a high diversity. The analysis showed that itgenetically grouped separately with S. oryzae. It contained in districts in North Sumatra has two large groups : group A1 and A2. Group A1 consisting of Ajamu, Bah Birong Ulu, Binanga, Bukit Sentang, Marihat, Padang Madarsah and PT. TPS Sibolga while the Group A2 consists of two regions, namely Marihat and Bah Birong Ulu while S. oryzae contained in Medan form their own group.

Karakterisasi Molekuler Elaeidobius kamerunicus Faust. (coleoptera;curculionidae) Asal Sumatera Utara Menggunakan Metode Amplified Fragment Length Polymorphism (AFLP) Muhammad Riza Fahlevi; Darma Bakti; Suzanna Fitryani Sitepu; Agus Eko Prasetyo
Jurnal Agroekoteknologi Vol 6, No 2, April (2018)
Publisher : Universitas Sumatera Utara

Elaeidobius kamerunicus introduced to Indonesia in Palm Research Center, Marihat. It is one pollinator to pollinate palm. Genetic changes in these insects cause a decline in palm oil production. The purpose of this study to determine the genetic diversity of it based molecular analysis techniques AFLP using three primers. Primers used are HEX (EcoR1 ACA - Mse1 CTT), FAM (EcoR1 AGG - Mse1 CAG) and FAM (EcoR1 AGG - Mse1 CTT). Analysis of genetic diversity using the MEGA program version 6. Phylogenetic tree using 'Neighbor-Joining Tree'. AFLP amplification product to 42 samples of genomic it and 3 Sitophilus oryzae genomic sample as a control showed a high diversity. The analysis showed that itgenetically grouped separately with S. oryzae. It contained in districts in North Sumatra has two large groups : group A1 and A2. Group A1 consisting of Ajamu, Bah Birong Ulu, Binanga, Bukit Sentang, Marihat, Padang Madarsah and PT. TPS Sibolga while the Group A2 consists of two regions, namely Marihat and Bah Birong Ulu while S. oryzae contained in Medan form their own group.

The Number Population of Elaeidobius kamerunicus Faust. (Coleoptera: Curculionidae) to Pollinate the Oil Palm Flowers Linda Friscilla Jessica Hulu; Maryani Cyccu Tobing; Darma Bakti; Agus Eko Prasetyo
Jurnal Agroekoteknologi Vol 7, No 1,Jan (2019)
Publisher : Universitas Sumatera Utara

Developed-fruit was formed by pollination. One of pollination method could be composed using pollinator beetle such as Elaeidobiuskamerunicus. The objective of this research wasto study the effective of population E. kamerunicus to pollinate the palm oil flowers. It was arrange by Randomized Block Design with four treatments of bug (0, 100, 200 dan 300 adult) and six replication. The results showed that introduction of 200 adults is the most effective population in terms of fruit-bunch average weight (9.858 kg) and fruitlet average weight (7.146 kg). On the other hand, 100 adults is the most effective population amount in terms of fruit-set(56.90 %).

Keanekaragaman Serangga Hama Pada Perkebunan Kopi Arabikam (Coffea arabica L.) dan Robusta (Coffea canephora pierre.) di Desa Juma Lubang dan Desa Tumangger Kecamatan Sumbul Kabupaten Dairi Aidatul Oktavianda; Darma Bakti; Lisnawita Lisnawita
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Keanekaragaman serangga hama pada perkebunan kopi arabika (Coffea arabica L.) dan robusta (Coffea canephora Pierre.) di Desa Juma Lubang dan Desa Tumangger Kecamatan Sumbul Kabupaten Dairi. Penelitian ini bertujuan untuk mengetahui keanekaragaman serangga hama dan musuh alami pada lahan pertanaman kopi arabika dan kopi robusta di Desa Juma Lubang dan Desa Tumangger Kecamatan Sumbul Kabupaten Dairi. Identifikasi dilakukan di Laboratorium Hama, Fakultas Pertanian, Universitas Sumatera Utara, Medan. Penelitian ini di lakukan pada bulan Januari sampai Maret 2018. Penelitian ini menggunakan 5 jenis perangkap serangga yaitu : sweep net, pitfall trap, yellow trap, light trap dan handpicking, dan diulang sebanyak enam kali. Hasil penelitian menunjukkan serangga yang tertangkap pada lahan pertanaman kopi arabika terdiri dari 8 ordo dan 27 famili. Nilai kerapatan relatif tertinggi pada lahan kopi arabika sebesar 38,326%, yang terendah sebesar 0,0629% dan indeks keanekaragaman Shanon-Weiner (H’) 2,17236 (sedang), sementara pada lahan pertanama kopi robusta terdiri dari 8 ordo 23 famili dengan nilai kerapatan relative tertinggi sebesar 68,2836%, yang terendah sebesar 0,07463% dan nilai indeks keanekaragaman serangga sebesar 1,32258 (sedang).

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