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UJI BEBERAPA KONSENTRASI EKSTRAK TEPUNG DAUN SIRIH HUTAN (Piper aduncum L.) UNTUK MENGENDALIKAN PENYAKIT BUSUK BUAH KAKAO YANG DISEBABKAN OLEH Phytophthora palmivora Butl. Wulandari, Ayu; Ali, Muhammad; Venita, Yunel
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The research aims to observe and to find the best concentration of wild betel leaf powder extract to control cocoa pod disease caused by Phytophthora palmivora Butl. The research had been conducted from October to December 2015 at the Laboratory of Plant Pathology, Faculty of Agriculture, University of Riau. The research was conducted experimentally using a completely randomized design consisting of 6 treatments and 4 replications. The treatments were: 0, 50, 100, 150, 200, and 250 g wild betel leaf powder/L water. The parameters observed were : colony diameter of P. palmivora, inhibition percentage on P. palmivora colony diameter, incubation period of the disease, intensity of the disease and effectiveness and ability level of powder extract of wild betel leaf on the disease as botanical fugicide. Data were analyzed statistically using by ANOVA, except for the parameters of effectiveness and ability level of fungicide was analyzed descriptively. To compare the mean of treatments with Duncan's New Multiple Range Test (DNMRT) at 5% level was used. The results showed that the concentrations of wild betel leaf powder extract could inhibit the growth ofP. palmivora and control cocoa fruit disease. Concentration of wild betel leaf powder at 200 and 250 g / L water gave a better ability to control P. palmivora andcocoa pod disease because they caused a smaller intensity of disease which were 45,71 % and 46.25%. Key words : Cocoa Fruit, P. palmivora , concentration of Piper aduncum L. leaf powder.

PEMBERIAN PUPUK LIMBAH CAIR BIOGAS DAN PUPUK N TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN SAWI (Brassica juncea L.) Adiwijaya, Yuni Anggar; Armaini, Armaini; Venita, Yunel
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The purpose of this research is to know the influence of biogas liquid waste, the effect of N fertilizer and the interaction of the combination of biogas liquid waste fertilizer with N fertilizer, and to determine the dosage of biogas liquid waste, N fertilizer and combination of biogas liquid waste fertilizer with N fertilizer that can increase the production of plants mustard. This research was conducted experimentally using Randomized Block Design (RAK) which was arranged in factorial that consist of 2 factors.The first factor is the provision of biogas wastewater, L1 = Liquid waste fertilizer biogas 1 liter / m2, L2 = Liquid waste fertilizer biogas 3 liters / m2, L3 = Liquid waste fertilizer biogas 6 liters / m2, The second factor is the application of N fertilizer, U0 = No N fertilizer, U1 = N fertilizer 11.5 kg / ha equivalent to urea 25 kg / ha, U2 = Fertilizer N 23 kg / ha is equivalent to urea 50 kg / ha, From the above treatment, 9 combinations were obtained. Each experimental unit was repeated 3 times to obtain 27 experimental units and each unit of experiment was 20 plants, and 4 plants were taken as samples. Keywords: Biogas liquid waste, N and mustard greens

Pemberian Pupuk Limbah Biogas Terhadap Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Di Pre-Nursery Khoirudin, Al Hikmatu; Sampoerno, Sampoerno; Venita, Yunel
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The oil palm (Elaeis guineensis Jacq.) is a plant that has a fairly high economic value because it produces the world's largest vegetable oils. In Indonesia oil palm has a significance for the national economy, in addition to being able to create jobs as well as a source of obtaining country (foreign country). This research aims to know the influence of biogas liquid waste against the growth of seedlings of Palm and get a dose of the best nursery Pre-Nursery. Research using randomized complete design (RAL) non factorial consists of 5 treatments and four replicates. As for the treatment of: P0: 0 ml liquid waste biogas/plant, P1: 20 ml liquid waste/biogas plants, P2: 40 ml liquid waste/biogas plants, P3: 60 ml liquid waste biogas/plant, P4: 80 ml liquid waste/biogas plants. Based on the results of the analysis of the variety that the average grant of liquid waste biogas influential real against the high seeds, number of seeds, leaves diameter of seedlings, seeds, and dry weight ratio of oil palm seedlings root header in Pre-Nursery age ≤ 3 months. The best doses against the growth of seedlings of Palm Pre Nursery-aged ≤ 3 months i.e. 80 ml/plant. Key words: oil palm, waste biogas

ISOLASI DAN KARAKTERISASI Ralstonia solanacearum PENYEBAB PENYAKIT LAYU BAKTERI PADA BIBITEucalyptus pellita KLON 077 AA DAN PENGHAMBATANNYA OLEH Pseudomonad fluorescens Ahmad Fajarusshidiq; Irfandri Irfandri; Yunel Venita
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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1Mahasiswa Fakultas Pertanian Universitas Riau2Dosen Fakultas Pertanian Universitas Riau The research aims to isolate and characterize Ralstonia solanacearum cause bacterial wilt on seedlings of Eucalyptus pellitaclon 077 AA and its inhibition by Pseudomonad fluorescens. The research was conducted at Laboratory of Plant Protection Department PT. Arara Abadi Group Sinarmas, Subregency of Tualang, Regency of Siak, Province of Riau from July to September 2019. The research was conducted using exploration and observation method and then analyzed descriptively. The observation parameters were morphological characteristic, physiological characteristic, virulency, inhibition ability by Pseudomonad fluorescens and bacterial race. Isolation of phatogenic bacteria from seedlings of Eucalyptus pellita clon 077 AA obtains two isolate which has similar morphological characteristic one each other. Physiological characteristic shows that R. solanacearum isolate Rs-2 has similar characters toR. solanacearum on colony colour in medium NAPSA+TZC, negative reaction on gram test, negative reaction on gram staining test, positive reaction on oxidase test and positive reaction on OF test. Virulency test of R. solanacearum isolate Rs-2 towards E. pellita seedlings shows positive reaction so R. solanacearum isolate Rs-2 is pathogenic. The inhibition zone that produced by Pseudomonad fluorescens towards R. solanacearum isolate Rs-2 is 17,3 mm in medium King’s B and 12,4 mm in medium NAPSA and classifies as strong and the mechanism of its inhibition is bacteriostatic. The pathology race test shows that R. solanacearum isolate Rs-2 is Ralstonia solanacearumon race 1.Keywords: Characterization, Eucalyptus pellita, isolation, Pseudomonad fluorescens, Ralstonia solanacearum

Pemberian PupukOrganikHayatiGreen BotanedanRock Phosphatepada Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Fase Pembibitan Utama di Medium Ultisol Ferdinand M. P Simatupang; Yunel Venita; Sri Yoseva
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The research was conducted at the experimental farm of the Faculty of Agriculture, University of Riau, Pekanbaru 12.5 Km Binawidya Campus from April to July 2016. Trial usingcompletely randomized design (CRD) factorial. The first factor utilization of organic fertilizer biological Green Botane consisted of 4 levels (0, 25, 50, and 75) g/ polybag plants and the second factor of fertilizers Rock Phosphate consisting of 3 levels (15, 30, and 45) g/polybag plants. The treatment was repeated 3 times. Data results were analyzed statistically operates with ANOVA andcontinued test of HSD (Honestly Significant Difference) at 5% level. The observed parameters isplant high, leaf number, diameter stump, root volume, the ratio of the canopy and root dry weight and analysis of plant phosphor uptake. Results indicate the interaction of biological organic fertilizer Green Botane and Rock Phosphate significant effect on the root volume, dry weight and the ratio of the canopy and roots, no real effect on the increase of high growth, leaf number, diameter core and analysis of phosphorus uptake. The combination of biological organic fertilizer Green Botane 75 g/polybag and Rock Phosphate 45 g/polybag is the best combination of the parameters and increase plant growth tends to increase. Keywords:Elaeisguineensis Jacq., biological organic fertilizers, Rock phosphate, Ultisol

UJI KOMPATIBILITAS KONSENTRASI SUSPENSI TEPUNG DAUN SIRIH HUTAN (Piper aduncum) DENGAN Trichoderma harzianum Rifai UNTUK MENGENDALIKAN PENYAKIT BUSUK BUAH KAKAO Alpinsyah AD Ritonga; Muhammad Ali; Yunel Venita
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Fruit rot diseaseasof cocoa is caused by the infection of Phytopthora palmivora. The diseas can cause a 50% reduction of cocoa yield. Control method that can be used is to combine a the botanical fungicide with antagonistic microbes which can be applied in disease control. The purpose of this study is to determine the compatibility of some concentrations of Betel leaves flour suspension with Tricoderma harzianum and to obtain the best combination to control diseases in cocoa fruits.Theexperimenthas been conducted experimentally using a Completely Randomized Design consisting of 5 treatments and 4 replications. The treatments were the concentration of suspension of betel leaves flour suspension with T. harzianum (0 g/l water + T. harzianum, 25 g/l water + T. harzianum, 50 g/l water +T. harzianum, 75 and 100 g/l water + T. harzianum).The data analyzed statistically with the analysis of variance and continuoudHonesty Significant Different (HSD) test at 5% level. The results indicated that the treatment of some suspension concentrations of betel leaves flour with T. harzianum is incompatible in controlling the P. palmivora fungus. Concentrations of suspension betel leaves flour of 100 g/lwater withT. harzianum showed the best ability to inhibit the growth of P. palmivora fungus on PDA medium, decrease the initial symptoms appereance of Cocoa fruit rot disease, and decrease the intensity of cocoa fruit rot disease by 33,87%. Keywords: Compatibility, betel leaves flour, Trichoderma harzianum, Phytophthora palmivora

PENGENDALIAN PENYAKIT HAWAR DAUN PHYTOPHTHORA PADA BIBIT KAKAO (Theobroma cacao L.) DENGAN BEBERAPA TINGKAT PENGENCERAN Bacillus subtilis F. Cohn Nurul Umamah; Gunawan Tabrani; Yunel Venita
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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This research aims to suppress the pathogenic attack of Phytophthora palmivora Butler fungi on cocoa seedlings by using dilution levels of B. subtilis F. Cohn so that cocoa seedling growth become better. The research carried out in the Plant Disease laboratory and experimental gardens Faculty of Agriculture, University of Riau. Preparation of the inoculum until to the last observation done in December 2017 to June 2018. The study was conducted in a completely randomized experimental design consisting of five treatments and 4 replications. The treatments tested were B. subtilis bacterial dilution levels, is that without dilution, 10-10 dilution, 10-9 dilution, 10-8 dilution and 10-7 dilution. The data obtained in analyzed of variance and continued by the Duncan’s new multiple range test (DNMRT) at 5% level. The results showed that B. subtilis bacterial dilution affected to the initial symptoms appeared disease, the intensity of the disease attack, seedling height, stem diameter and number of leaves of cocoa seedlings. Bacterial dilution of B. subtilis 10-7 dilution is the better in controlling of Phytophthora leaf blight disease of cocoa seedlings so that better growth of cocoa seedlings. Keywords: Cocoa seedlings, B. subtilis dilution, P. palmivora leaf blight.

Produksi Biomassa, Kadar N dan Bintil Akar Berbagai Leguminous cover crop (LCC) Pada Tanah Dystrudepts Gian Sapta Adrialin; Wawan '; Yunel Venita
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 1, No 2 (2014): Wisuda Oktober 2014
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This research was aimed to know biomass production, nitrogen fixation and root nodules by LCC on Dystrudepts. The research was conducted at the greenhouse of Faculty of Agriculture University of Riau from December 2013 to Maret 2014.This research was an experimental with 5 treatments (Mucuna pruriens, Pueraria javanica, Calopogonium mucunoides, Centrosema pubescens and Mucuna bracteata) with 4 replications and each replications consist of 4 plants. Data obtained from this study were analyzed by ANOVA and continued with Duncan’s New Multiple Range Test at 5%. The results showed that LCC panted on Dystrudepts produce different biomass, nitrogen fixation and also root nodules on Dystrudepts and Mucuna pruriens is better than Calopogonium mucunoides, Pueraria javanica, Centrosema pubescens and Mucuna bracteata. Key words: LCC, Dystrudepts, Mucuna pruriens.

PEMBERIAN PUPUK LIMBAH CAIR BIOGAS DAN PUPUK N TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN SAWI (Brassica juncea L.) Yuni Anggar Adiwijaya; Armaini Armaini; Yunel Venita
Jurnal Online Mahasiswa (JOM) Bidang Pertanian Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Pertanian

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The purpose of this research is to know the influence of biogas liquid waste, the effect of N fertilizer and the interaction of the combination of biogas liquid waste fertilizer with N fertilizer, and to determine the dosage of biogas liquid waste, N fertilizer and combination of biogas liquid waste fertilizer with N fertilizer that can increase the production of plants mustard. This research was conducted experimentally using Randomized Block Design (RAK) which was arranged in factorial that consist of 2 factors.The first factor is the provision of biogas wastewater, L1 = Liquid waste fertilizer biogas 1 liter / m2, L2 = Liquid waste fertilizer biogas 3 liters / m2, L3 = Liquid waste fertilizer biogas 6 liters / m2, The second factor is the application of N fertilizer, U0 = No N fertilizer, U1 = N fertilizer 11.5 kg / ha equivalent to urea 25 kg / ha, U2 = Fertilizer N 23 kg / ha is equivalent to urea 50 kg / ha, From the above treatment, 9 combinations were obtained. Each experimental unit was repeated 3 times to obtain 27 experimental units and each unit of experiment was 20 plants, and 4 plants were taken as samples. Keywords: Biogas liquid waste, N and mustard greens

Pemberian Beberapa Konsentrasi dan Interval Penyemprotan Ekstrak Daun Sirsak terhadap Hama Myzus persicae Sulzer pada Tanaman Cabai Yunel Venita; Hafiz Fauzana; Mukti '
Jurnal Sagu Vol 8, No 01 (2009)
Publisher : Universitas Riau

The usage of synthetic insecticide commonly used to control pest has negative impact on human helath and environment. The soursop (Annona muricata L.) leaves had been frequently tested for controlling pest at various concentration and spraying interval. This research was conducted at farmer field at Simpang baru panam, Pekanbaru city. This research was carried out by factorial experiment of group randomized design with two factors, four and two levels, and three repklications. The first factor was different concentration of soursop leaves extract, and the second factor was the spraying interval was effective to prevent Myzus persicae pest.

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