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Lahmuddin Lubis
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry

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The Effectiveness concentration of some fungicide with mix by peat water on palm oil leaf spot disease (Curvularia sp.) in vitro Deni Yolanda Sinaga; Lahmuddin Lubis; Fatimah Zahara; Agus Eko Prasetyo
Jurnal Agroekoteknologi Vol 5, No 4 (2017)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.178 KB) | DOI: 10.32734/jaet.v5i4.16513

Abstract

This research was to study response of  the effectiveness fungicides with different concentrations on the leaf spot disease(Curvularia sp.)in vitro. This research was conducted at Center of Oil Palm Research, Marihat, Pematang Siantar. The method used factorial completely randomized design with three factors and three replications. The first factor was kind of fungisida active ingredients (mancozeb, metalaxcyl, benomyl, buirimat, and tebuconazole), the second factor was water solvent (normal water, shallow peat water (50 cm – 100 cm), medium peat water (101 cm – 200 cm) and depth peat water (201 cm -300 cm)) and third factor was concentrationsof  fungicide(1 ml/l (g/l), 2ml/l (g/l) and 3ml/l (g/l) . The results showed Tebukonazol fungicide active ingredient was able to inhibit the groth of leaf spot leaf disease (Curvularia sp.) and the most effective concentration is 2 ml/l using the medium peat water solvent
Eksplorasi cendawan endofit pada akar tanaman karet (Hevea brasiliensis Muell. Arg.) sebagai agens hayati jamur akar putih (Rigidoporus microporus (Swartz; Fr)) di kabupaten Asahan Inni Izzati; Lahmuddin Lubis; Hasanuddin Hasanuddin
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (682.836 KB) | DOI: 10.32734/jaet.v7i2,April.21842

Abstract

ABSTRACT Endophytic fungi are known be able to produce secondary metabolites that often impact on the growth of its host, such as enhance its growth and increasing the resistance of plant to biotic and abiotic stress condition. This research was aimed to isolate and test endophytic fungi which have potency as biocontrol agents against Rigidoporus microporus on rubber tree. The research was conducted at Plant Disease Laboratory, Program Study of Agrotechnology, Faculty of Agriculture, Universitas of Sumatera Utara, Medan from September 2017 to February 2018. It was done by using Completely Randomized Design (CRD) Non Factorial.  The results indicated there were 8 genus of fungi  (Rhizoctonia sp., Penicillium sp., Gliocladium sp., Trichoderma sp., Aspergillus sp., Rhizopus sp., Mucor sp. dan Fusarium sp.) from roots of rubber tree in Asahan that have potency as biological agent to control R. microporus in rubber tree. The best results were obtained on genus Aspergillus sp. with inhibition zone was 81,11%. 
Keragaman Jamur Antagonis Pada Rhizosfer Karet (Hevea Brassiliensis Muell.Arg.) Sehat dan Terserang Jamur Akar Putih (Rigidoporus Microporus (Swartz: Fr) irma aryani; Lisnawita Lisnawita; Lahmuddin Lubis
Jurnal Agroekoteknologi Vol 7, No 2,April (2019)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.6 KB) | DOI: 10.32734/jaet.v7i2,April.21906

Abstract

The beneficial microorganisms in the rhizosphere are very abundant. This potential, especially antagonistic fungi can be used to control soil-borne pathogens, including in controlling white root rot disease which is a soil-borne pathogen. This study aims to determine the antagonistic fungal diversity of healthy rubber rhizosphare and infected with white root rot disease. This research was conducted in Plant Disease Laboratory, Faculty of Agriculture, Universitas Sumatera Utara from October 2017 until March 2018. The research was conducted by collecting of soil samples from healthy rubber plant and infected white root rot disease in rubber plantation of Silomlom Village, Simpang Empat Sub-district, of Asahan Regency then soil samples were isolated in the Laboratory until obtained a pure fungi isolates and antagonistic test and identified to the genus level. The results showed that fungi obtained in healthy plant rhizosphere were Mortierella, Humicola, Fusarium, Aspergillus, Gliocladium, Penicillium, Trichoderma and on the plant rhizosphare attacted white root disease obtained fungi Trichoderma, Humicola, and Phialophora. The results of antagonistic test showed that the highest inhibition was Mortierella that was 90%, then Trichoderma was 71.85%, Aspergillus 66.46% and the lowest was Humicola 27.78%.
Co-Authors Aditia Exaudi tampubolon Agus Eko Prasetyo Arie Ramadhina Arie Ramadhina Benny Benny Cici Indriani Dalimunthe Cici Indriani Dalimunthe Cici Indriani Dalimunthe Darma Bakti Debi Sabrina Ompusunggu Deni Yolanda Sinaga Desy Siburian Edi Kembaren Fatimah Zahara Febepriskila Br Tarigan Hasanuddin Hasanuddin Ida Rumia Manurung Immanuel Sembiring Indra Hardian Matondang Inni Izzati Intan Purnamasari Irda Safni Irena Santy Waruwu irma aryani Leo Alvian Ginting Lisnawita Lisnawita Luskino Silitonga Lydia Manurung Marah Halim Pulungan Marheni Marheni Maryani Cyccu Tobing Maya Sari Rahayu Mirasiska Tarigan Mukhtar Iskandar Mukhtar Iskandar Pinem Mutiah Sari Neny Yanti Siregar Nova Berta Sianturi Nugraha Pratama Dhana Ridha Hasanah Sihombing Rini Junita Ronaldo Hasudungan Pangaribuan Rotua Maryance Gultom Sarah Valentina N. Sari M. D. Panggabean Sondang Sitanggang Sri Ahdani Yuta Suzanna F. Sitepu Syahrial Oemry Tatik Fadilah Hakim Harahap1 veronika vero sidabutar Yuswani Pangestiningasih Yuswani Pangestiningsih Yuswani Pangestiningsih Yuswani Yuswani Pangestiningsih Zaida Fairuzah Zaidah Fairuzah