Rina Sriwati
Program Studi Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala

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PRATYLENCHUS BRACHYURUS (GODH) FILIPJEV. & STEKHOVEN IS ONE OF THE IMPORTANTPLANTPARASITIC NEMATODES THAT ATTACKED ROOT OF PATCHOULI AND THE CAUSAL OF MOT NECROSIS, GROWTH RETARDATION, REDDISH OR YELLOWISH LEAF: A GREENHOUSE STUDY WAS CONDUCTED TO EVALUATE THE LEVEL OF RESISTANT OF SIX PATCHOULI CULTIVARS, THOSE WERE WIDE PLANTED IN SUMATERA AGAINST P. BRACHYURUS, AND TO DETERMINE THE EFFECT OF POPULATION LEVEL OF THE NEMATODES ON THREE DZRERENT RESISTANCE PATCHOULI. SIX PATCHOULI CULTIVARS Sriwati, Rina; Sinaga, Meity S.; Mustika, Abdul Muin Adnan' Ika
Buletin Hama dan Penyakit Tumbuhan Vol. 11 No. 2 (1999): Buletin Hama dan Penyakit Tanaman
Publisher : Buletin Hama dan Penyakit Tumbuhan

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Abstract

Pratylenchus brachyurus (Godh) Filipjev. & Stekhoven is one of the importantplantparasitic nematodes that attacked root of patchouli and the causal of mot necrosis, growth retardation, reddish or yellowish leaf: A greenhouse study was conducted to evaluate the level of resistant of six patchouli cultivars, those were wide planted in Sumatera against P. brachyurus, and to determine the effect of population level of the nematodes on three dzrerent resistance patchouli. Six patchouli cultivars were inoculated with 200 nematodes& soil. Based on reproduction index the cultivar of Seulimum Putih, Pidie and Sidikalang known as susceptible ones Tapaktuan and Seulimum Merah was moderate resistant and Girilaya was resistant. Furthermore, the effect of population levels of P. brachyurus (0, 100, 200 and 800 nematodes& soil) on three patchouli cultivars showed that 200 nematodeskg soil population caused significant effect on reduced shoot and weight root and plant height on susceptible cultivars, howevec on the moderat resistant and resistant cultivar the signifcance effect occurred at 800 nematodeslkg soil. The reproduction factors on three patchouli cultivars were decreased with the increased of population nematodes level. me oil and chlorophyll content have been decreased on the infectedpatchouli cultivars atfive month afCer inoculation.
FIELD APPLICATION OF TRICHODERMA SUSPENSION TO CONTROL CACAO POD ROT (PHYTOPHTHORA PALMIVORA) Sriwati, Rina; Chamzurn, Tjut; Soesanto, Loekas; Munazhirah, Munazhirah
AGRIVITA, Journal of Agricultural Science Vol 41, No 1 (2019)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i1.2146

Abstract

Cacao pod rot caused by Phytophthora palmivora, is an important disease and contributes significant disease losses to global cocoa production. This research objective was to determine the effect of Trichoderma harzianum and T. virens suspensions to cacao pod rot disease on the field. This research was carried out in Pulo Hagu village, Pidie Regency, Aceh, Indonesia from March to July 2017. The single pattern randomized block design was adopted to evaluate three treatments, i.e. without suspension (control), suspensions of T. Harzianum, and T. virens for eight replications. Each replication consisted of three of experimental units. The result showed that both of Trichoderma species contained only Alkaloid metabolite based on Phytochemical test. On the field, the application of T. harzianum suspension reduced the percentage of fruit infection and disease intensity for 48.57 %, 46.04 % at 12 weeks after application (WAA) respectively. Based on the percentage reduction in the area of the spot between the metabolites T. harzianum suspension and control and T. virens and control are 47.24 % and 27.46 % at 87 WAA respectively. In addition, T. virens suppressed the percentage of infected fruit and the intensity of infected fruit for 40.61 % and 38.02 % at 12 WAA.
FIG POLLINATING WASP TRANSFERS NEMATODES INTO FIGS OF FICUS RACEMOSA IN SUMATRA, INDONESIA Jauharlina, Jauharlina; Sriwati, Rina; Yusmaini, .; Kanzaki, Natsumi; Compton, Stephen
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 2 (2015): Life Sciences
Publisher : Syiah Kuala University

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The fruits (figs) of fig trees (Ficus spp, known as ?bak ara? in Aceh), are the source of food for many species of faunas in the forest, including birds, monkeys, orangutans, etc.  Pollination within the figs totally depends on female fig wasps that belong to family Agaonidae. Fig trees and their pollinating wasps rely on each other to survive.  Female fig wasps are known to transport nematodes into receptive figs when the wasps enter the figs to lay  eggs.  An investigation on the nematodes carried by female pollinating wasps Ceratosolen fusciceps Mayr into figs of Ficus racemosa was conducted in Sumatra, Indonesia. The figs on the trees were regularly sampled to determine the presence of nematodes and infer their ecology. The Baermann funnel method was employed to extract the nematodes from the figs.  Eight species of nematodes were recorded from the figs, two of which are still unidentified.  The species found were (1) Teratodiplogaster fignewmani, (2) Teratodiplogaster sp., (3) Parasitodiplogaster sp., (4) Schistonchus sp1., (5) Schistonchus sp2., (6) Mononchoides sp., (7) and (8) two undescribed Diplogastridae species (?umbrella-like? species 1 and species 2).  This is the most diverse fig nematode community recorded. The highest nematode populations were routinely found in D-phase figs, when the new generations of wasps were about to emerge.   Details of the ecology of each nematode species are likely to differ, but as a group they did not seem to significantly affect seed and wasp development in F. racemosa figs
COLONIZATION ABILITY OF BIOLOGICAL CONTROL AGENT TRICODERMA SPP ON COCOA POD AND SEEDLING Sriwati, Rina; Khamzurni, Tjut; Iskandar, Elvira; Lestari, Mitra T. A.
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 2 (2015): Life Sciences
Publisher : Syiah Kuala University

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Some  of Trichoderma species  as  antagonistic  fungi  are  usually  considered  soil  microorganism, They  colonize  plant  roots,  some- times  forming  a  symbiotic  relationship.  Three  species  of Trichoderma (T. virens, T. harzianum and T. asperellum) have been inoculated on cacao seedling and  cocoa  pod. Trichoderma species  can  be  re-isolated  from  surface  sterilized  cacao  seedling, including the stem and leaf, root, and pod then observed their colonization ability. Fungal hyphae were observed under the microscope emerging from the leaf, steam, root of seedling and pod as soon as 1 day after their isolation from surface sterilized cacao seedling and pod. All Trichoderma species  were  able  to  enter  and  make  colonization.    The  highest  percentage  of  colonization occurred  in  the T.  harzianum by  73.3%  (leaves),  46.7%  (trunk)  and  86.7%  (roots).  While colonization  on the  skin  cocoa  pod  (epidermis)  also  has  a  different  percentage,  the  highest percentage indicated in the treatment of T. harzianum by 63.3%. We conclude that T. harzianum better  biological  control  agent  base  on  their  ability  to  colonize  all  part  of  seedling and  pod. Trichoderma species into the cacao stem, leaf, root and pod allowing systemic colonization of this tissue.
NEMATODE SPECIES INHABITING PINE TREES KILLED BY THE PINEWOOD NEMATODE, BURSAPHELENCHUS XYLOPHILUS Sriwati, Rina
Jurnal Agrista 2008: Edisi Khusus Nomor 1 November 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Spesies Nematoda Habitat Pada Pohon Pinus Mati Akibat Terserang Penyakit Layu Nematoda (Bursaphelenchus xylophilus).ABSTRAK. Spesies-spesies nematode habitat pada pohon pinus mati akibat terserang nematode (Bursaphelenchus xylophilus) telah diisolasi dan diidentifikasi. Lima belas spesies nematode telah terdeteksi, diantaranya (i) lima spesies nematode mycophagus: B. xylophilus, Bursaphilenchus n. sp., dan B. sinensis, Tylencida sp. 1, Tylencida sp. 2; (ii) Sembilan spesies nematode saprophagus: Diplogasterida sp. 1, Diplogasterida sp. 2, Diplogasterida sp. 3, Diplogasterida sp. 4, Monhisterida sp. 1, Monhisterida sp.2, Rhabditida sp. 1, Rhabditida sp. 2, Plectidae sp.; dan (iii) satu spesies nematode predator yaitu Mononchida sp. Dari setiap waktu pengamatan nematode B. xylophilus ditemukan merupakan spesies nematode yang paling dominan, dan diikuti oleh spesies Diplogasterida sp. 1.
DETEKSI DAN IDENTIFIKASI CENDAWAN ENDOFIT TRICHODERMA YANG BERASOSIASI PADA TANAMAN KAKAO Sriwati, Rina; Chamzurni, Tjut; Sukarman, Sukarman
Jurnal Agrista Vol 15, No 1 (2011): Volume 15 Nomor 1 April 2011
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Detection and Identification of Endophyte Trichoderma Fungi Associated Cocoa PlantABSTRACT. The endophytic fungi are non pathogenic fungi and almost all of them associated with plant cells without any symptoms. Endophites fungi that associated with cacao plant from East Aceh has been isolated. Based on morphological and molecular identification was found two species of fungi Trichoderma spp which is fungal antagonist. Molecular identification have provided the species of Trichoderma virens and Trichoderma longibrachiatum. Trichoderma virens had goog poteny as biological control agains patogen.
FORMULATION OF TRICHODERMA VIRENS ORIGIN OF ACEH COCOA CONTROLLING BLACK POD DISEASE CAUSED BY PHYTOPHTORA PALMIVORA CHAMZURNI, TJUT; SRIWATI, RINA; MUARIF, RIZKY; AMIN, BUNI; ULIM, ABDUH
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 4, No 2 (2014): Life Sciences
Publisher : Syiah Kuala University

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Trichoderma virens have been isolated from rooting cocoa in Aceh and in the laboratory have been reported capable of inhibiting the growth of P. palmivora in vitro. However, the formulations of T. virens from Aceh can be used as an alternative product for farmers in controlling black pod disease of cocoa. This research was conducted t the Laboratory of Plant Pathology College of Agriculture Syiah Kuala University and cocoa fruit samples obtained from cocoa plantations owned by farmers in Pidie Jaya District of Aceh. The purpose of the study was to obtain an application formulations strains of T. virensfrom Aceh, as one of the biological control study consisted of seven treatments, namely W (water), Pest (Mancozeb Fungicide), Det (Detergent), Det+Tv( detergent+strainsof T.virens), P+Tv (Adhesive +strainsof T.virens), Co+Tv( Corn Oil+strainsof T.virens), Po+Tv (Palm oil+strainsof T.virens) and each treatment was repeated 10 times to obtain70 experimental units. The parameters observed incubation period, disease incidence (%), and the diameter of the spots (cm). Application results show that the strains of T. virens Origin Aceh effective in controlling P. palmivora on cocoa pods and the best  formulation in controlling P. palmivora on cocoa pods are corn oil+T. virens formulation (Co +Tv) compared with other formulations are characterized by the length of the incubation period, the low incidence of P. palmivora disease, and the small diameter of the spots on the cocoa pods.
CHARACTERISTIC SYMPTOMS OF PHYTOPHTHORA PALMIVORA ON COCOA LEAVES Sriwati, Rina; Muarif, Rizky
Jurnal Natural Volume 12, Number 2, September 2012
Publisher : Universitas Syiah Kuala

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The research was aimed to determine the characteristics symptoms of Phytophthora palmivora on cocoa leaves, and was conducted in Plant Diseases Laboratory, the Faculty of Agriculture Syiah Kuala University. Mature cacao leaves with almost the same size in the quotation were used at Lab. Plant disease. Suspensions of P. palmivora were inoculated on leaves by spraying techniques with several concentrations of treatment, 1x102, 1x104, 1x106. The results showed that cocoa leaves? symptoms were getting yellow colour around the veins and the whole leaves eventually showed lesion on the third day after spraying. The higher spores? population of P. palmivora could impact higher invasive infections. Characteristic symptoms will be very helpful in the process of observation of early disease in the nursery.
TRICHODERMA VIRENS ISOLATED FROM COCOA PLANTATION IN ACEH AS BIODECOMPOSER COCOA POD HUSK Sriwati, Rina; Chamzurni, Tjut; Bukhari, Bukhari; Sanjani, Anwar
Jurnal Natural Volume 13, Number 1, March 2013
Publisher : Universitas Syiah Kuala

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Sustainable development on cocoa farming have been places great emphasis on the management of natural resources for Cocoa pod husk. Until now, there has been much public attention for a farming waste, environment polluting and a place to develop various diseases, especially fungal Phytopthora. To overcome these problems, it needs to utilize alternative cocoa pods. The aims of this study were: (1) to determine the potential use of Trichoderma virens isolated from cocoa plantation in Aceh as bio-decomposer in the composting process cocoa pods. The composition of potential use experiment; Manure+Trichoderma (PT); Cocoa pod husk+Trichoderma (KT); Cocoa pod husk + Manure (KP); Cocoa pod husk +Manure+Trichoderma (KPT) has been tested. The analysis result showed that the combined use of Trichoderma virens compost although no effect on the color, texture and smell of compost but could be effect on characterized of compost maturity by characteristics of C/N compost. The content of C/N compost on all treatments in accordance with the standard compost maturity thus considered quite feasible to be applied to the crop.
PENGARUH TRICHODERMA TERHADAP PERKECAMBAHAN DAN PERTUMBUHAN BIBIT KAKAO, TOMAT, DAN KEDELAI Nurahmi, Erida; Susanna, Susanna; Sriwati, Rina
Jurnal Floratek Vol 7, No 1 (2012)
Publisher : Program Studi Agroteknologi, Fakultas Pertanian, Universitas Syiah Kuala

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Trichoderma is a free-living fungus, commonly can be found in soil and root ecosystem.  Extensively, it is capable of producing antibiotics, parasite to other fungus, and microorganism that cause diseases on plants.  The objectives of the experiment were to study effects of Trichoderma on germination and growth of cacao, tomato, and soybean. The result showed that provision of Trichoderma (T. harzianum and T. virens) conidia suspension using seed submersion technique did not affect seed germination of cacao, tomato, and soybean, but significantly affected cacao root extension. Provision of Trichoderma through seed submersion on sand box germination gave a positive response to tomato plant, tolerance to cacao plant, and a negative response to soybean plant.  The causing factors of difference responses varied including concentration, application techniques, and kinds of seed.