Garuda - Garba Rujukan Digital

Article Per Year (5 Year)

p-Index From 2019 - 2024

0.92

P-Index

This Author published in this journals

All Journal JURNAL ILMU PERTANIAN JURNAL AGROHITA Jurnal Agrium Jurnal Agro Estate

Guntoro Guntoro

Sekolah Tinggi Ilmu Pertanian Agrobisnis Perkebunan

Author-ID : 2613073

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Industrial & Manufacturing Engineering Other

Published : 6 Documents Claim Missing Document

Claim Missing Document

Articles

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.

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).

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 APLIKASI HERBISIDA SISTEMIK BERBAHAN AKTIF GLIFOSAT TERHADAP TINGKAT KEMATIAN GULMA DAN TOTAL MIKROORGANISME TANAH Guntoro Guntoro; Sakiah Sakiah; Raju Setiawan Damanik
Jurnal AGROHITA: Jurnal Agroteknologi Fakultas Pertanian Universitas Muhammadiyah Tapanuli Selatan Vol 5, No 1 (2020): Jurnal Agrohita
Publisher : Fakultas Pertanian Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jap.v5i1.1736

Pengendalian gulma pada lahan yang cukup luas biasanya dilakukan menggunakan herbisida kimiawi yaitu seperti herbisida sistemik sehingga gulma lebih cepat diatasi. Herbisida kimia memiliki bahan aktif yang dapat mempermudah dan mempercepat proses kematian gulma.. Bahan aktif yang terkandung di dalam herbisida dapat teresidu di tanah, sehingga tidak hanya bersifat toksin pada gulma tetapi juga dapat mempengaruhi aktivitas biota tanah. Penelitian ini di lakukan di lahan praktek mahasiswa Sekolah Tinggi Ilmu Pertanian Agrobisnis Perkebunan (STIPAP). Pene;itian ini bertujuan untuk mendapatkan dosis yang tepat dalam penggunaan herbisida glifosat untuk mengendalikan gulma dan mengetahui dampajnya terhadap mikroorganisme tanah.Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) Non faktorial dengan lima taraf dan tiga ulangan sehingga diperoleh 15 satuan penelitian. Menggunakan 5 perlakuan yaitu : tanpa perlakuan (P0),glifosat 5 ml/ L dengan frekuensi 2 minggu(P1), glifosat 5 ml/ L dengan frekuensi 1 minggu(P2), glifosat 10 ml/ L dengan frekuensi 2 minggu (P3),glifosat 10 ml/ L dengan frekuensi 1 minggu (P4). Gulma terbanyak pada plot penelitian adalah sambung rambat (Micania micrata) sebanyak 269 gulma, dan gulma paling sedikit adalah patikan kebo (Eurphorbiata) dan putri malu (Mimosa pudica) yang masing-masing berjumlah 4 gulma. Mortalitas tertinggi pada 1 minggu setelah aplikasi (MSA) terjadi perlakuan P1 dengan persentase 96 % dan mortalitas terendah terdapat di perlakuan P4 dengan persentase 91,3 %.Aplikasi herbisida sistemik berbahan aktif glifosat berpengaruh tidak nyata terhadap total mikroba tanah antar perlakuan.

Pengaruh Aplikasi Stimulan Terhadap Hasil Produksi Tanaman Karet (Hevea brasiliensis Muell.Arg) Di PT. Socfin Kebun Tanah Besih Ingrid Ovie Yosephine; Guntoro Guntoro
Agrium Vol 16, No 2 (2019)
Publisher : Faculty of Agriculture, Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/agrium.v16i2.1936

Stimulants are a substance used to stimulate the rubber plant to remove more latex than usual. Giving stimulant is usually done on plants aged over 6 years and on slow stater clones such as PB217 stimulant application done in the morning and a sunny day (not rain). Applied to the tapping grooves with lace application technique that is by lubricating the stimulant solution on the tapping groove without pulling scrapnya, in this study water-soluble stimulant or 1 liter of stimulant mixed by 3 liters of water to form a concentration of 2.5% stimulant used Ethrel PA 10. The research was conducted in Afdelling I Kebun Tanah Besih PT. Socfin. The time of this study was conducted in July until August 2017. The results showed that in giving stimulant can increase the production of latex, and lump, it's just DRC decreased dikolakan stimulant solution used has stimulated rubber tree to absorb water more than usual so that greater amount of water than its latex content. Keywords: Lubrication Time, Dose, and Tapping System

Co-Authors Cici Dalimunthe Gema Tarigan Ingrid Ovie Yosephine Ingrid Ovie Yosephine Mardiana Wahyuni Muhammad Yusuf Dibisono, Muhammad Yusuf Priyo Adinugroho Radite Tistama Raju Setiawan Damanik Sakiah Sakiah Sulthon Parinduri Wandi Marwadi Afandi Widia Lista Nasution

Title

Found 6 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 6 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 6 Documents
Search