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INDONESIA
Jurnal Perlindungan Tanaman Indonesia
Published by Universitas Gadjah Mada
ISSN : 14101637     EISSN : 25484788     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Arjuna Subject : -
Articles 509 Documents
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Periodisitas Harian Kehadiran Walang Sangit (Leptocorisa oratorius F.) pada Kepiting yang Membusuk Solikhin Solikhin; Edhi Martono
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 2 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12957

Abstract

To know daily periodicity attendance of rice bug (Leptocorisa oratorius F.) in response to sixth-day-decaying crab, an experiment was conducted in four consecutive days in May 1997 in Gamping, Special Territory of Yogyakarta. The experiment consisted of 17 treatments and 3 replications arranged in randomized completely block design. Seventeen hourly observations (treatments) were made on rice bugs attendance on the decaying crab by direct counting as well as the relative humidity and temperature from 5 am to 9 pm. The result of the experiment showed that the peaks of rice bug attendance were from 10 am to 6 pm, while the highest one was at 5 pm (20 rice bugs).
Colonization of Tomato Root by Antagonistic Bacterial Strains to Fusarium Wilt of Tomato Arif Wibowo
Jurnal Perlindungan Tanaman Indonesia Vol 11, No 2 (2005)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12084

Abstract

Fusarium wilt of tomato caused by Fusarium oxysporum f.sp. lycopersici (Fol) is an important disease in tomato which cause a significant loss of yield in major growing regions of the world. This study examined the ability of bacterial strains antagonistic to F. oxysporum f.sp. lycopersici (H5, H22, H63, H71, Burkholderia cepacia strain 65 and 526) to colonize tomato seedlings and the effect of plant growth. The effect of bacterial population size and air temperature on the bacterial colonization and their spread along the root systems was also assessed.The results of this study showed that the bacterial population at 28°/23° C day/night temperature 14 days after planting was significantly greater than 23°/18° C for 4 of 6 strains tested. Although there was no significant effect of temperature on bacterial population observed in this study, the ability of the baacterial strains to colonize the rhizosphere was significantly different. Three strains (H5, B. cepacia strain 65 and 526) survived well in the rhizosphere and at 4 weeks after planting rhizosphere populations per gram fresh root were not significantly different from those recovered 2 weeks after planting. The largest population of the bacterial inoculants developed in the basal region of the roots and this differed between strains by log10 2.7 cfu/cm root. The bacterial populations in other parts of the root were also strain dependent. Strain H71, for example, was able to colonize the root segments at a high population level. However strain H63 was recovered only in small number in all root segments.
Survei Odontoglossum ringspot virus (ORSV) yang Menginfeksi Anggrek Alam Tropis di Indonesia Mahfut Mahfut; Budi Setiadi Daryono; Tri Joko; Susamto Somowiyarjo
Jurnal Perlindungan Tanaman Indonesia Vol 20, No 1 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.16617

Abstract

Natural orchids are one of the important ornamental plants that were cultivated in tropical countries, including Indonesia. Virus infections has been important limiting factor in orchids cultivation because it decreases the orchids quality. Odontoglossum ringspot virus (ORSV) is one of the most reported virus infecting orchids which spread widely in the world. During 2010–2014 surveys of viral infections were conducted in Indonesia. The orchids were found infected by virus, showed symptoms of mosaic, mottle, chlorotic, necrotic, streak, wilting leaf, and ringspot on leaf surface. Detection with serological test DAS-ELISA showed only 11 from 125 samples were infected by ORSV with total incidence of 8,8%. Nine leaf samples of Phalaenopsis sp. were infected, respectively. Thus, it was concluded that Phalaenopsis is orchids genus which is the most abundantly and susceptibly infected by ORSV. The results proved that ORSV have entered and spread widely by infected orchids in orchids landscape (nursery), semi-natural forests (botanical gardens), and natural forest (national park) throughout Indonesia. This is the first report of ORSV infecting natural tropical orchids in Indonesia. INTISARI Anggrek alam merupakan salah satu kekayaan flora asli negara tropis, termasuk Indonesia. Keberadaan di habitat aslinya sudah sangat berkurang yang disebabkan kerusakan hutan dan adanya penyakit. Infeksi virus masih menjadi faktor pembatas terpenting dalam budidaya dan pengembangan potensi anggrek alam. Odontoglossum ringspot virus (ORSV) adalah salah satu jenis virus yang dilaporkan paling banyak menginfeksi anggrek serta memiliki penyebaran yang luas di dunia. Selama 2010-2014 telah dilakukan survei lapangan terhadap infeksi virus di Indonesia. Beberapa anggrek yang ditemukan terinfeksi oleh virus menunjukkan gejala berupa mosaik, belang, klorosis, nekrosis, streak, daun layu, dan bercak cincin pada permukaan daun. Deteksi dengan uji serologis DAS-ELISA menunjukkan bahwa 11 dari 125 sampel terinfeksi oleh ORSV dengan total kejadian 8,8%. Masing-masing sembilan dari total sampel daun terinfeksi merupakan Phalaenopsis sp. Hal ini menjelaskan bahwa Phalaenopsis adalah genus anggrek yang paling cocok dan rentan terhadap infeksi ORSV. Hasil penelitian survei kejadian infeksi Odontoglossum ringspot virus (ORSV) membuktikan bahwa virus ini telah masuk dan menyebar secara luas oleh anggrek-anggrek alam tropis yang terinfeksi di pertamanan anggrek (nurseri), hutan semi-alami (kebun raya), dan hutan alam (taman nasional) di seluruh wilayah Indonesia. Ini merupakan laporan pertama mengenai infeksi ORSV terhadap anggrek-anggrek alam tropis di Indonesia.
Hubungan Pemencaran Kutu Daun dengan Diseminasi Potato Virus Y (PVY) pada Tanaman Kentang (Solanum tuberosum L.) Reymas M. R. Ruimassa; Sri Hendrastuti Hidayat; Rusmilah Suseno; Soemartono Sosromarsono
Jurnal Perlindungan Tanaman Indonesia Vol 9, No 1 (2003)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12271

Abstract

Two aphid species, Myzus persicae (Sulzer), and Aphis gossypii (Glover) and the five potato varieties (Alpha, Bintje, Berthaultii, Granola and Premiere) were used in the experiments to study the relationship between insect vector dispersal and dissemination of disease caused by potato virus Y (PVY). The results showed that M. persicae could cause time for the appearance of first symptom two to four time faster than A. gossypii . Although statistical analysis (anova) in general showed that disease incidence is not significantly different for each treatment. M. persicae caused higher disease incidence than A. gossypii on Bintje (56 and 74 days after planting). M. persicae seems to have better capability to disperse when the plant reach vegetative growth stadia which may result in higher efficiency of transmitting the virus. The relationship between aphid dispersal and dissemination of PVY can be grouped into four categories (1) plant with aphid and showing symptom; (2) plant without aphid but showing symptom; (3) plant with aphid but without symptom; (4) plant without aphid and without symptom.
Aktivitas Harian dan Preferensi Burung Predator Lanius sp. terhadap Hama Sexava spp. Fredy Lala; F. X. Wagiman; Nugroho Susetya Putra
Jurnal Perlindungan Tanaman Indonesia Vol 16, No 1 (2010)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11740

Abstract

The objective research is to know the daily activities and preference of predatory birds Lanius sp. to several stages of Sexava spp. Ten predatory birds 12 to 14 months of age were bought at merchant bird in Yogyakarta. The study was conducted naturally under controlled condition in cages. Before the study was conducted the predatory birds were acclimatized for three days by feeding them cricket and gradually changed to Sexava spp. The young nymphs, old nymphs, adult male, and adult female of Sexava spp. were found at coconut plantation in Dumagin village became the new dietary of the predator. The result showed that Lanius sp. is a diurnal bird; the activities were dominated by hunting and preying (16.52%), followed by flying (6.53%), jumping (5.70%), and walking (4.58%). The Lanius sp. preferred to prey on significantly more nymphs of Sexava spp. than the adult. The birds prey proportionally on the young nymphs, old nymphs, male, and adult females for 50%, 41%, 5%, and 4%, respectively.
Pemanfaatan Enzyme-Linked Immunosorbent Assay untuk Mengukur Titer Virus dalam Bawang Putih Susamto Somowiyarjo; Endang Mugiastuti; Y. M. Sugi Maryudani
Jurnal Perlindungan Tanaman Indonesia Vol 6, No 1 (2000)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12407

Abstract

Non-precoated Indirect ELISA had been developed by employing monoclonal antibodies against virus isolated from Sangga variety of garlic. The ELISA was used to measure the titer of virus in the plant. In comparation with biological assay using Chenopodium amaranticolor, ELISA was able to measure the virus titer faster and was more simpler. The highest titer of virus was obtained using the first leaf of garlic at age of 29-36 days after planting. Application of nitrogen at high dose and high temperature of garlic cultivation trends to increase the virus titer. The results of this experiment may be used to improve the method of sampling to detect virus in garlic tissues.
Penekanan Penyakit Lincat Tembakau Temanggung dengan Streptomyces spp. Triwidodo Arwiyanto; Kharis Haryono; Achmadi Priyatmojo; Toekidjo Martoredjo; Gembong Dalmadiyo
Jurnal Perlindungan Tanaman Indonesia Vol 13, No 1 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11777

Abstract

Streptomyces is one of a soil microorganisms which is rarely used by Indonesian researcher for biological control of planth pathogent. Local isolates of Streptomyces spp. were used in this study to control "lincat disease" of Temanggung tobacco. Ninety four isolates of Streptomyces were tested directly in the field to suppress the development of lincat disease in the field. Six isolates, i.e. Stre-4, Stre-7,Stre-48, Stre-61, Stre-66 and Stre-67 suppressed the disease development with various degree. It was likely that decreasing the concentration of bacterial antagonist gave better protection against the disease. In vitro experiments indicated that there was no correlation between inhibition pathogen in vitro and ability to suppress disease in the field. The result showed that selection of antagonist in vitro based on antibiosis will eliminate the chance to get other potential antagonist.
Potensi Jamur Patogen Tumbuhan sebagai Agen Pengendali Biologi Gulma Alang-alang Bambang Nugroho; Titik Suryani; Bambang Hadisutrisno
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 1 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.12903

Abstract

Biological control is an important component of integrated pest management, including integrated pest management on weed. One of the important biological control agents is plant pathogenic fungi. The purpose of this research is to identify potential fungi to be developed as an agent of biological control on alang-alang (Imperata cylindrica L). A survey was conducted in highland and lowland areas which were seriously infested by alang-alang to know the disease intensity and its distribution. Sample of diseased leaves were taken for identification and pathogenecity testing. Four fungal diseases - leaf blight, rust and two kinds of leaf spot that are caused by Phoma sp, Puccinia rufipes Diet and two unidentified pathogens - were found. By inoculation trials it was proven that Phoma sp. is pathogenic to alang-alang. Considering that there are potential pathogenic fungi causing several diseases on alang-alang, it is possible to develop a method of controlling the grass by using pathogenic fungi.
Eksplorasi, Pengujian, dan Identifikasi Khamir Antagonis terhadap Patogen Antraknos (Colletotrichum lagenarium) pada Semangka Kardi Raharjo; Christanti Sumardiyono; Nursamsi Pusposendjojo; Sismindari Sismindari
Jurnal Perlindungan Tanaman Indonesia Vol 12, No 1 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.11964

Abstract

Phyllosphere is one of habitat of yeast and the other microorganism included an antagonistic microorganism. The antagonistic yeasts have been isolated from watermelon phyllosphere on YM Agar medium. There are 30 isolates of yeast have been found. The pure culture of virulent isolate 115 of C. lagenarium used for testing the antagonistic ability of yeast isolates. Two yeast isolates namely K10 and K15 have highest ability to inhibit growth and development of C. lagenarium colony. From microscopic observation, the isolates K10 and K15 caused deflated on C. lagenarium hyphe. The result of identification of K10 is Candida sp. and K15 is Sirobasidium sp.
Uji Pengendalian Penyakit Layu Fusarium Pisang (Fusarium oxysporum f. sp. cubense) dengan Asam Fosfit dan Aluminium-Fosetil Yuli Kristiawati; Christanti Sumardiyono; Arif Wibowo
Jurnal Perlindungan Tanaman Indonesia Vol 18, No 2 (2014)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.15610

Abstract

The aims of the research is to know the effect of phosphite acid and fosetyl-aluminium fungicides on Fusarium oxysporum f.sp. cubense (Foc) in vitro and the effect of these fungicides to fusarium wilt of banana. The experiments consist of in vitro and in planta tests. Fungicides concentrations used were 0; 500; 1,000; 2,000; and 4,000 ppm. Isolate tested was A13 isolate Foc on 4 months old Cavendish cultivar banana seedlings. The result showed that phosphite acid was better than fosetyl aluminium in reducing mycelium growth in vitro. Its also inhibited disease development in banana seedling. The phosphite acid and fosetyl-aluminium increased the resistance of banana Cavendish cultivar to fusarium wilt. Its because the two fungicides are working systemic fungicides.Penelitian ini bertujuan untuk mengetahui pengaruh fungisida asam fosfit dan aluminium-fosetil terhadap pertumbuhan jamur Fusarium oxysporum f.sp. cubense (Foc) in vitro dan pengaruh fungisida tersebut terhadap penyakit layu fusarium pada tanaman pisang. Penelitian ini terdiri dari 5 perlakuan kepekatan fungisida, yaitu 0 ppm (kontrol), 500 ppm, 1000 ppm, 2000 ppm, dan 4000 ppm. Isolat jamur yang digunakan yaitu Foc A13. Bahan tanaman adalah bibit pisang kultivar Cavendish asal kultur jaringan 4 bulan setelah aklimatisasi. Hasil penelitian menunjukkan bahwa fungisida asam fosfit (Agrifos) lebih efektif untuk menghambat pertumbuhan jamur Foc daripada fungisida aluminium-fosetil (Aliette) secara in vitro. Fungisida asam fosfit dan aluminium-fosetil menghambat perkembangan penyakit layu pada bibit pisang. Kedua fungisida tersebut juga meningkatkan ketahanan tanaman pisang terhadap penyakit layu fusarium. Hal ini disebabkan kedua jenis fungisida tersebut bekerja secara sistemik. 

Page 31 of 51 | Total Record : 509

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