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Y. Andi Trisyono
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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 10 Documents
 1 
Search results for , issue "Vol 3, No 1 (1997)" : 10 Documents clear
Pengaruh Penggenangan dan Pengeringan terhadap Populasi dan Siklus Hidup Nematoda Puru Akar Padi (Meloidogyne graminicola) Mulyadi Mulyadi; B. Triman
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 1 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8058.464 KB) | DOI: 10.22146/jpti.12908

Abstract

The objectIves of the research were to study the effect of flooding and draining on the population and life cycle of root-knot nematode of rice (Meloidogyne graminicola). To study the effect of flooding and draining on the population of M. graminicola two experiments were done within two period of planting of rice IR 64. These experiments were arranged in completely randomize design with four replications. For studying the effect of flooding and draining on the life cycle of M. graminicola, the experiment was done within 30 days. The research results showed: 1) continuously flooding inhibit the penetration and population development of M. graminicola on rice IR 64, but the life cycle of M. graminicola was not affected; and 2) seventy two hours period of draining enhanced the development of M. graminicola compared to period of draining shorter than 72 hours.
Pengaruh Ekstrak Daun Mimba terhadap Perkembangan Antraknos pada Apel Manalagi Pascapanen Ika Roostika Tambunan; Christanti Sumardiyono
Jurnal Perlindungan Tanaman Indonesia Vol 3, No 1 (1997)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4975.36 KB) | DOI: 10.22146/jpti.12904

Abstract

Neem leaf extract inhibitss spore germination of Colletotrichum gloeosporioides. Leaf extract obtained by Soxhlet method is better than leaf extract obtained by boiling water method. The extract inhibits development of anthracnose disease on manalagi apple up to nine days after spraying.
Arah Pengembangan Biosistematika di Indonesia Soenartono Adisoemarto; Yayuk R. Suhardjono
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.12909

Abstract

To be able to see general picture of organism diversity, including their interrelationships, biosystematics is applied. Usefulness of these interrelationships is related to the positions of each of the units, which can be determined only by biosystematics. However, not too many biosystematicist are aware of the usefulness of these interrelationships. To reveal the interrelationships and hierarchy restructurization of the grouping in needed. There are two approaches proposed to do the restructurization : through concept of biosystematics and through biosystematics units. The biosystematic units approach has been selected. In the short term program, identification of biosystematic categories with high priority is suggested to be selected as the units to be handled. ln this respect, it is relevant to the management of agricultural pests and weeds, especially on rice. Special efforts must be given to biotype development, seasonal forms, complex species, and indication of evolutionary tendency of important species. The lack of data and information on these aspects will hinder the roles and function of biosystematics. For long term program, the activities will be focused on the identification of groups and research aspects which support their biosystematic endeavour. The suggested high prioritized group is Pyralidae as rice pests, followed by soil insect of agricultural importance, fruit flies of the family Tephtritidae, and horticultural, plantation and wood pests. For health aspect, focusing on sibling and complex species is needed, especially on the vectors of malaria and dengue haemorrhagic fever. Short term program projection is the availability and adequacy of data for treatment in short period. For long term program the formulation for anticipating the impacts of the development on the selected groups. Both of these program projections are also needed by the educational institutions for planning and determining human resources needed for conducting the program.
Penularan Penyakit Mosaik Kacang Panjang oleh Aphis craccivora Y. B. Sumardiyono; Supratoyo Supratoyo; Samsuri Samsuri
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.12905

Abstract

Transmission of cowpea mosaic disease (Vigna unguiculata (L.) Walp.) caused by Cowpea Aphid-borne Mosaic Virus (CAMV) through insect vector Aphis craccivora Koch was studied tn the laboratory and the field. Serial inoculation test in varied inoculation access period (1, 5, 10, and 15 minutes) was done to determine the retention time of virus. Field studies were undertaken to evaluate the effect of the number of initial inoculum and plant age on the disease progress. The results showed that viruliferous insect retained their inoculativity untill third series inoculation with 5, 10, and 15 minutes inoculation access period. lt indicated that the longest retention time was 45 minutes, and virus - insect relationship is non-persistent. The disease-spread changed with the number of initial inoculum and the age of the plant. The highest disease intensity of 97.92 per cent was observed in the plot with 2 diseased plants as inittal inoculum and the insects vectors were infested at 10 days plant of age. While the lowest was observed in the plot with one diseased plant as initial inoculum and infestation of insects vector at 30 days after planting.
Pengendalian Hayati Penyakit Layu Bakteri Tembakau: 1. Isolasi Bakteri Antagonis Triwidodo Arwiyanto
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.12910

Abstract

Three hundred strains of fluorescent pseudomonad and 120 strains of Bacillus spp. were isolated from the rhizosphere of Mimosa invisa L. Fluorescent pseudomonad was isolated on King s B while Bacillus spp. were isolated on Tryptic Soy Agar medium. Each media were supplemented with 100 ppm cycloheximide to suppress fungal growth. All isolated strains were tested for their capability to suppress the growth of Pseudomonas solanacearum on appropiate media. Most of fluorescent pseudomonad inhibited the growth of the pathogen with an inhibition zone from 1 mm to 16 mm. The mechanism of growth-inhibition was bacteriostatic and some of them were bactericidal. Sixty six out of 120 strains of Bacillus spp. produced defined inhibition zones on the media. The zone of growth-inhibition varied from 2 to 14 mm and the mechanism of inhibition was bactericidal. Several strains of those two bacterial marga exhibited non-antagonistic activity toward each other.
Pengaruh Populasi Nematoda Puru Akar (Meloidogyne graminicola) terhadap Pertumbuhan dan Hasil Padi Mulyadi Mulyadi
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.12906

Abstract

The objective of the research wwas to evaluate the effect of initial population levels of Meloidogyne graminicola on growth and yield of rice especially cultivated IR64. Initial population levels of Meloidogyne graminicola used were: 0; 0.25; 0.5; 1.0; 2.0; 4.0; 8.0; and 16.0 larvae/ml of soil. The research results were: 1) M. graminicola did not influence rice seedling emergence; 2) seedling death was found at 20 days after sowing, 70% of seedling died 30 days after sowing at the population level of 16.0 larvae/ml of soil; 3) the yield of rice decreased up to 38.45% in pot inoculated with M. graminicola at 16.0 larvae/ml of soil; 4) the relationship between yield and initial population of M. graminicola is described by the equation Y=m+(1-m)z^P.T where m = 0.66, z= 0.96, and T= 1.0.
Pemanfaatan Membran Nitroselulosa untuk Pengiriman Antigen Uji dalam Deteksi TMV dengan DIBA Susamto Somowiyarjo; Y. B. Sumardiyono; Suharno Suharno
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.12969

Abstract

Simplification of dot immunobinding assay (DIBA) by using TMV-infected samples which were stored and mailed in nitrocellulose membrane (NCM) was described. The antigenicity of TMV in DIBA could be maintained in leaf extract-dotted NCM which had been stored at 29ºC al least for 42 days. The method was developed for sending samples using infected leaf extract-dotted NCM to replace fresh samples. By this method, the antigenicity of the virus could he detected after they have been sent to 18 places which took time from 7 to 26 days. It ts anticipated that the simplicity of DIBA using mailed samples will lead to DIBA's rapid adoption for development of central diagnosis facilities to support the viral diseases management. It may also have wider use in DIBA-based screening and survey programs for plant viruses and could overcome plant quarantine restriction.
Isolasi, Pemurnian dan Karakterisasi Parsial Soybean Stunt Virus Sri Sulandari; Y. B. Sumardiyono; Roechan Roechan
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.12902

Abstract

The objective of this study was isolation and characterization of Soybean Stunt Virus, the causal agent of soybean stunt disease. The virus was isolated with single lesion method through Chenopodium amaranticolor and Vigna unguiculata, and then propagated on Nicotiana tabacum var. Xanthi. Differential centrifugation method was used for purification. Virus isolate obtained from Bogor was used for futher studies. The result showed that SSV could be isolated on C. amaranticolor, but not on V. unguiculata and then propagated on Niconana tabacum var. Xanthi without any symptom. Purified virus showed A260/A280 = 1.55, lower than that of CMV. The virion were small isometric particles, about 30 nm in diameter. Coat protein consists of a single type of subunit protein, with molecular weight about 29 kD.
Status Penyebaran Penyakit Tungro pada Padi di Jawa Barat I Nyoman Widiarta; Yulianto Yulianto; M. Muhsin
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.12907

Abstract

An investigation on the status of tungro virus was conducted in the coastal lowland paddy fields less than 100 m above sea level, in Bekasi, Karawang, Subang, lndramayu, Cirebon and highland paddy fields more than 100 m to 1500 m above sea level in Subang, Bandung, Purwakarta, Cianjur, Sukabumi, Bogor of West Java in wet season crop 1996/1997 to discover recent status of tungro virus disease infestation. Disease incidence was observed randomly from 100 hills in each locality. Leaves of rice plant were also sampled from each observation field for ELISA test in the laboratory. Population density and species composition of green leafhopper were observed from 25 single stroke sweeping net. Tungro symptom as well as virus were not discovered in the coastal lowland paddy fields. Therefore, the coastal lowland paddy fields were declared still uninfected by tungro virus until recently. However, the disease symptom and virus were observed in highland. The green leafhopper species Nephotettix virescens was dominant in both lowland and highland. The species N. nigropictus was only identified from highland paddy fields. Population density of green leafhopper was higher in highland than in lowland. Factors contributing to the different in population density and change in the species composition were discussed.
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.

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