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All Journal JURNAL ILMU PERTANIAN JURNAL AGRILAND Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JURNAL AGROHITA Jurnal Agrium Jurnal Agroplasma Best Journal (Biology Education, Sains and Technology) Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Agro Estate ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) International Journal of Educational Research Excellence (IJERE) GMPI Conference Series Tabela Jurnal Pertanian Berkelanjutan Jurnal Agro Estate Jurnal Agro Fabrica

Guntoro

Institut Teknologi Sawit Indonesia

Author-ID : 6863868

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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Uji Potensi Alelopati Ekstrak Daun Mangga (Mangifera indica. L.) Sebagai Bioherbisida Terhadap Gulma Babandotan (Ageratum conyzoides L.) Guntoro, Guntoro; Yusuf Dibisono, Mhd; Sinaga, Anisyah
Agrium Vol 17, No 1 (2020)
Publisher : Faculty of Agriculture, Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/agrium.v17i1.2355

Penelitian ini bertujuan untuk mengetahui efektivitas dan konsentrasi optimum ekstrak daun mangga (Mangifera indica L.) yang memiliki senyawa fenol yang berfungsi sebagai bioherbisida yang dapat menghambat pertumbuhan gulma Babandotan (Ageratum conyzoides). Penelitian ini dilakukan di rumah kaca STIPAP dari bulan April hingga Mei 2019. Metode yang digunakan adalah Desain Acak Lengkap Non-Faktorial. Variabel yang diamati adalah tinggi gulma, panjang akar gulma, bobot basah gulma, dan bobot kering gulma. Hasil penelitian ini menunjukkan bahwa senyawa alelokimia ekstrak daun mangga 60% merupakan konsentrasi yang efektif dan merupakan bioherbisida alternatif dalam mengendalikan pertumbuhan gulma. Kata kunci : Bioherbisida, Mortalitas, Gulma Babandotan, Alelopati

Penggunaan Mineral Kalium dan Silikon untuk Menekan Serangan Penyakit Gugur Daun Pada Tanaman Karet (Hevea brasiliensis L.). Ingrid Ovie Yosephine; Guntoro Guntoro; Radite Tistama; Priyo Adinugroho; Cici Dalimunthe
AGRIUM: Jurnal Ilmu Pertanian Vol 22, No 3 (2020)
Publisher : UNIVERSITAS MUHAMMADIYAH SUMATERA UTARA

Penyakit daun gugur selalu menyerang pada saat awal pembentukan daun tanaman karet. Infeksi penyakit ini menyebabkan bentuk dan ukuran daun yang kurang sempurna. Daun yang tidak sempurna bentuknya dan transparan mempengaruhi kemampuan fotosintesisnya dan akibatnya produksi karet tidak optimal. Tujuan penelitian adalah untuk mempelajari pengaruh aplikasi kalium dan silikon terhadap toleransi tanaman karet beberapa penyakit gugur daun (Coletotrichum sp dan Fusicoccum sp). Penelitian ini menggunakan bibit polibeg klon PB 260 umur 4 bulan yang telah dipupuk dengan N, P dan Mg (12:12:2) dengan dosis 12 gr polibeg. Penelitian ini menggunakan Rancangan Acak Kelompok dengan dua faktor yaitu dosis KCl (0, 5,8 g, dan 11,6 g per polibeg) dan dosis silikon (0, 20, 40 ml/L). Adapun parameter yang diamati pada penelitian ini yaitu intensitas serangan penyakit dan klorofil total. Hasil penelitian ini diketahui bahwa silikat cenderung meningkatkan toleransi tanaman karet terhadap Pestalotipsis sp., dan tidak berpengaruh terhadap C. autatum.

PEMANFAATAN SERAT PELEPAH KELAPA SAWIT SEBAGAI BAHAN PEMBUATAN KAMPAS REM SEPEDA MOTOR Guntoro Guntoro; Ingrid Ovie Yosephine; Simon Simanjuntak
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 10, No 2 (2021): Juni
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v10i2.155-160

Brake pads are generally made of asbestos, which is less environmentally friendly and widely available in nature, therefore motorcycle brake pads are made that utilize palm frond fibers filled with alumina powder and bonded to a polyurethane matrix. This research was conducted at the Laboratory of Material Testing of Industrial Chemical Technology Polytechnic (PTKI) Medan. Research was carried out from February-July 2020, using two test, namely the Rockwell Hardness level test and the Pin On Disk Friction Coefficient test. The result showed that oil palm frond fibers can be made into motorcycle brake pads with the addition of alumina powder according to the predetermined composition. After going through the test, the Rockwell hardness level was obtained in A2 treatment (6% Alumina) with the highest and best hardness level, namely 52.75 Kg. And after testing the friction coefficient of the Pin On Disk type, brake pads from palm frounds with the addition of alumina powder composition which have the lowest coefficient value of the best are obtained in treatment A2 (6% Alumina) with a value of 0.000765 N/mm2. Keywords : biocomposite, brake shoes, palm fround fibers, alumina powder

EFEKTIVITAS BIOFUNGISIDA Trichoderma koningii TERHADAP PENCEGAHAN PENYAKIT JAMUR AKAR PUTIH DI PEMBIBITAN BATANG BAWAH TANAMAN KARET (Hevea brasiliensis) Gema Tarigan; Mardiana Wahyuni; Guntoro .
Jurnal Agro Estate Vol 3 No 1 (2019): Juni 2019
Publisher : Institut Teknologi Sawit Indonesia

One of the main obstacles in rubber cultivation is the white root fungus (JAP) attack which caused by Rigidophorus ligonosus. This pathogen infects rubber plants from the nursery until the mature plants. Efforts to control the disease have been carried out by chemical, technical culture and use of biological agencies. This research was conducted at the STIP-AP Medan in January 2017 to June 2017, this study used a non-factorial Randomized Block Design (RBD) with four replications and four treatments. Using Trichoderma koningii with somes doses were 20 grams, 30 grams, and 40 grams/seedling. The results of this study indicate that the biofungicide application of Trichoderma koningii 30 g/seedling produces the greatest inhibition of the rubber plants seedling nursery against the growth of pathogens Rigidoporus lignosus.

KEMAMPUAN PREDATOR (Sycanus annulicornis Dhorn) DALAM MENGENDALIKAN HAMA ULAT API (Setothosea asigna) DI PERKEBUNAN KELAPA SAWIT Wandi Marwadi Afandi; Sulthon Parinduri; Guntoro .
Jurnal Agro Estate Vol 3 No 1 (2019): Juni 2019
Publisher : Institut Teknologi Sawit Indonesia

Sycanus annulicornis is an important predator for palm leaf-eating caterpillars (UPDKS) from the Limacodidae family. Therefore, these predators need to be propagated and disseminated in the area of oil palm plantations so that they can become a mortality factor in biological control (UPDKS). Predator S. annulicornis is a predator that is very useful for controlling caterpillar pests in oil palm plantations. His ability to prey on fire caterpillars in the field, as well as his short life cycle and high reproductive ability make this predator very potential to be applied in fire caterpillar pest control. This research was carried out at Sycanus House Afdeling V Tanah Raja PT. Perkebunan Nusantara III Serdang Bedagai North Sumatra. The time of the study was carried out in August - September 2018. The results showed that fire caterpillar (Setothosea asigna) was able to be controlled by predators (Sycanus annulicornis) in F1 treatment (1 Sycanus annulicornis), F2 (2 Sycanus annulicornis) and F3 on the first day after application, the highest mortality seen in the treatment F3 (3 Sycanus annulicornis).

Evaluation Of The Pest Rat Census Sample Method (Rattus Sp.) at Sei Merah Estate PT. PP London Sumatera Indonesia Tbk Adi Prima Saragih; Ahmad Saleh; Guntoro Guntoro
Jurnal Agro Estate Vol 2 No 2 (2018): Desember 2018
Publisher : Institut Teknologi Sawit Indonesia

The most damaging mammalian pests of oil palm plants are rats consisting of house mice (Rattus diardii), rice mice (Rattus argentiventer), and tree rats (Rattus tiomanicus). In controlling rat pest, a census is needed as a guideline for implementing good control. The common census method applied on plantations is 5% of the sample area, but there are obstacles in the implementation for high plants, and rat sporadic attacks. This research was conducted in May - July 2018 at Sei Merah Field with descriptive and correlation techniques. This study aims to evaluate census sample methods, at different attack rates. Another goal is to determine one indication of rat's attacked to represent other indications as a reference for the census method. Observation was made with a census of 100% (whole) trees in the 3 speciﬁed areas. Attacked tree category is if there was a damage on the fruit on the tree, the loose fruit (brondolan), and the male ﬂowers on the tree. Then 100% census observation compared to the 50%, 30%, 20%, 10%, and 5% rate samples. The results of the observation showed that the census sample method carried out using a 5% sample was declared eﬀective, because the regression ratio of the results of 5% rate sample (0.90) was not diﬀerent from the regression of 100% rate sample (1.00) and indications of the tree that attacked by rats on oil palm.

EFEKTIVITAS BIOINSEKTISIDA JAMUR ENTOMOPATOGEN Aspergillus sp TERHADAP MORTALITAS LARVA KUMBANG TANDUK (Oryctes rhinoceros) (Coleoptera : Scrabaidae ) Guntoro Guntoro; Nuraida Nuraida; Zizi Graci Violita
Jurnal Agro Estate Vol 2 No 1 (2018): Juni 2018
Publisher : Institut Teknologi Sawit Indonesia

Oil palm (Elaeis guineensis Jacq) is one of important plantations in the Indonesia role economy. Oil palm can be attacked by various pests or diseases from the nursery. One of the important pests is Oryctes rhinoceros. Some control methods are manually, mechanically, chemically and biologically which are environmentally friendly. One of the biological controls of the Oryctes larvae is with Aspergillus sp. This research was conducted at STIPAP Medan in June - July 2017. Treatment of Aspergillus A0, A1, A2, A3, and A4 bioinsecticides, concentrations of 0, 10, 20, 30, and 40 g / l. This study aims to determine the speed of mortality of larvae and concentration of Aspergillus eﬀective. From the results of this study it can be concluded that mortality of O. rhinoceros larvae seen on day 18 after application of Aspergillus sp at the treatment A4 with dose 40 gram Aspergillus sp and Aspergillus sp. eﬀective for controlling the O. rhinoceros larvae with mortality average above 90%.

AGRESIVITAS DAN DINAMIKA POPULASI KUNJUNGAN SERANGGA PENYERBUK Elaeidobius kamerunicus Faust. (Coleoptera : Curculionidae) PADA BUNGA TANAMAN KELAPA SAWIT (Elaeis guineensis Jacq.) DI KEBUN GREA PT. KARYA HEVEA INDONESIA BANGUN PURBA SUMATERA UTARA Muhammad Yusuf Dibisono; Guntoro Guntoro; Widia Lista Nasution
Jurnal Agro Estate Vol 1 No 2 (2017): Desember 2017
Publisher : Institut Teknologi Sawit Indonesia

Elaeidobius kamerunicus is one of the weevil pollinator of oil palm. Weevil pollinator, E. kamerunicus in plantation is useful to increase fruit set. Continuity of the oil palm pollination require minimal amount of the weevil. This research to know aggressiveness and population dynamic of the weevil E. kamerunicus in ﬂower of oil palm at Grea Estate PT. Karya Hevea Indonesia. This research uses descriptive analysis method consists of observing and collecting data about the aggressiveness and population dynamics of weevil pollinators visit in anthesis male ﬂowers and receptive female ﬂowers of oil palm of seven years after planting. Observations were made on an hourly basis, starting at 08:00 am until 15:00 pm. Observations were made daily on trees with receptive ﬂowers and anthesis ﬂowers, carried out for 20 days with a different tree every day. The results showed that the aggressiveness of the weevil Elaeidobius kamerunicus as the main oil palm pollinating insect had a signiﬁcant difference in interest. Where E. kamerunicus tend to be more aggressive to visit the male ﬂower anthesis as many as 1399 tails of the visiting receptive female ﬂower that only 25 tails. Effect of temperature on the population dynamics of E. kamerunicus visit also differ between male ﬂowers and female ﬂowers. For male ﬂowers, E. kamerunicus is more active at 27 ° C. While in the female ﬂowers, E. kamerunicus is active at 30 ° C. E. kamerunicus actively visited male anthesis ﬂowers and receptive female ﬂowers at 63% and 62% moisture respectively.

PENGARUH PERLAKUAN MEDIA TANAM, DOSIS ZEOLIT DAN KCl TERHADAP LAJU INFEKSI PATHOGEN Ganoderma boninense DI PEMBIBITAN UTAMA KELAPA SAWIT (Elaeis guineensis Jacq) VARIETAS D X P PPKS Guntoro Guntoro; Marshal Arifin Sinaga; Windra Surono
Jurnal Agro Estate Vol 1 No 2 (2017): Desember 2017
Publisher : Institut Teknologi Sawit Indonesia

Rotten disease of the base of the stem is currently already attacked crops of oil palm in the nursery. This last Task done research in the area of Sekolah Tinggi Ilmu Pertanian Agrobisnis Perkebunan. The research using random Design Group (RAK) Factorial with the sum of 12 and Deuteronomy 3 x as much treatment, oil palm seedlings grown in Sterile soil with polibeg media and ex Ganoderma with the awarding of the Zeolite and KCl application. Testing parameters are arranged on the test Range with Fingerprints Analysis F.Observations on the treatment of planting Media against the number of leaves showed no effect. For the application of Zeolite in General does not give a real Influence on the entire parameters. Whereas for the application of KCl test result statistics gives a real for influence is evident against the number of leaves, stem diameter, and height of the plant. The highest number of leaf chlorophyll contained in T0Z0K2 treatment with 66.49 CCI. The level of Infection Pathogens disease Ganoderma boninense, the level of the lowest root damage is present on the T0Z1K2 treatment with 31.62%.

PENGARUH HERBISIDA BERBAHAN AKTIF PARAQUAT TERHADAP PERSENTASE KEMATIAN GULMA DAN JUMLAH MIKROORGANISME TANAH Sakiah Sakiah; Guntoro Guntoro; Adri Moses Manullang
Jurnal Agro Estate Vol 4 No 2 (2020): Desember 2020
Publisher : Institut Teknologi Sawit Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47199/jae.v4i2.182

Paraquat is an active herbicide used to control weeds chemically. This research aim is to determine the effect of herbicide applications with active paraquat matters on the percentage of weed mortality and the number of soil microorganisms. This research used a non-factorial randomized block design with five levels of treatment, that is P0: control; P1: 5 ml of paraquat in 1 litre of water, frequency of application is once a week; P2: 10 ml of paraquat in 1 litre of water, frequency of application is once a week; P3: 10 ml of paraquat in 1 litre of water, frequency of application is once in two weeks; and P4: 5 ml of paraquat in 1 litre of water, frequency of application is once in two weeks. The results of the observations were compiled in a Variety Checklist and continued with the Duncan Multiple Range Test. The results showed that the dominant weeds in the research plot were Ageratum conyzoides, Mimosa pudica, and Paspalum commersonii.The application of 5 ml/l paraquat herbicide, the frequency of application once a week was effective in reducing weed mortality. However, the use of paraquat did not significantly affect the number of soil microorganisms

Co-Authors Adi Prima Saragih Adinda Thalia Adri Moses Manullang Ahmad Dhairobi Ahmad Fahmi Alhafiz Lubis Ahmad Saleh Aulia, Mhd. Iqbal Cici Dalimunthe Dina Arfianti Saragih Eka Bobby Febrianto, Eka Bobby Ferdy Ikhwan Gema Tarigan Habib Handoko Hari Gunawan Hasrudy Tanjung, Hasrudy Hastina Febriaty Ika Ucha Pradifta Rangkuti Ingrid Ovie Ingrid Ovie Yosephine Iqbal Bukhori Irda Safni Irma Christiana Isna Ardila Kurnainy Tohir Lisnawita Lisnawita Lubis, Abdul Rahman Lubis, Ahmad Fahmi Alhafiz Maisarah Makhrani Sari Ginting Mardiana Wahyuni Marshal Arifin Sinaga Marzuti Isra Maulina, Viny Muhammad Firza Alpi, Muhammad Firza Muhammad iqbal Muhammad Yusuf Dibisono Nuraida Nuraida Nurliana Poppy Fitria Pradana, Fery Priyo Adinugroho Radite Tistama Raju Setiawan Damanik Resty Fadhillah Rina Maharany Rini Astuti Rio Ardiansyah Fenni Rio Ardiansyah Fenni Ritna Wahyuni Roosmawati, Febriana Sakiah Sakiah Simon Simanjuntak Sinaga, Anisyah Sri Murti Tarigan Sulthon Parinduri Tantawi, A. Rafiqi Tiffany Zia Aznur Wagino Wandi Marwadi Afandi Widia Lista Nasution Windra Surono Yazid, Abu Yusuf Dibisono, Mhd Zizi Graci Violita Zulham Efendi Zulham Effendi

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