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Jurnal Perlindungan Tanaman Indonesia

jpti
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Published by Universitas Gadjah Mada

ISSN : 14101637 EISSN : 25484788 DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Arjuna Subject : -

Articles 509 Documents

1 2 3 4 5

Peranan Faktor Cuaca terhadap Infeksi dan Perkembangan Penyakit Bercak Ungu pada Bawang Merah Bambang Hadisutrisno; Sudarmadi Sudarmadi; Siti Subandiyah; Achmadi Priyatmojo
Jurnal Perlindungan Tanaman Indonesia Vol 1, No 1 (1995)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9351

Purple blotch disease caused by Alternaria porri (Ell.) Cif. is one of the most important diseases on shallots. The farmers have been using fungicides as a reliable control method, however, the chemical control method has to be considered for the negative effect on the environment and the danger to the other species and causes the resistance to a certain pesticide. Therefore, it is important to develop other method that is safe, effective, and efficient, like the use of climatic data to decide the control strategy. The result of the study on ecology of purple blotch disease carried out at the experimental station in Kramat-Tegal, Kledung-Temanggung, and KP4 Kalitirto in dry and rainy season (1991/1992) suggested that climatic factors played on important role on the daily conidium dissemination of Alternaria porri and on the intensity of purple blotch disease. Daily conidium dissemination which was one of the important component in the epidemy of purple blotch disease was influenced by the temperature, relative humidity, and the wind velocity. Conidium dissemination was occurred both during the day and night and at 10.00 am-14.00 pm when the air temperature and wind velocity were high with low relative humidity, conidium dissemination was maximum. On the other hand, at 22.00 pm – 02.00 am there was minimum conidium dissemination. The result on the effects of leaf wetness period on disease intensity suggested that high humidity was not the only factor caused disease infection but it has to be supported by the presence of thin film water on the leaf surface at least for 4 hours since the attachment of the conidia on the leaves.

Ketahanan Relatif Enam Belas Nomor Klon Teh PGL terhadap Serangan Empoasca sp. F.X. Wagiman; Bellarminus Triman
Jurnal Perlindungan Tanaman Indonesia Vol 17, No 2 (2011)
Publisher : Universitas Gadjah Mada

The relative resistance of sixteen selected PGL tea clones against Empoasca sp. had been studied at tea estate of Pagilaran. Six selected and superior tea clones were PGL 4, 6, 9, 10, 11, 15, and ten other selected clones were PGL1, PGL2, PGL3, PGL5, PGL7, PGL8, PGL12, PGL13, PGL14, dan PGL16. Growth stage of the test tea-plants was productive stage, hence it was already infested by Empoasca sp.within several years. The study was conducted in the dry season of September 2011−November 2011, in which the climatic conditions support the increase of pest populations. Moderate level of pest populations was appropriate for conducting the research. Therefore, afdeling Pagilaran was chosen as a research site because of its moderate level of Empoasca sp. population (3.74 individuals/20 sweepnets), while in the afdeling Andongsili the population was low (1.70 individuals/20 sweepnets) and in afdeling Kayulandak was too high (9.81 individuals/20 sweepnets). Resistance criterion was developed based on statistical-analysis result of the pest population. Results showed that all PGL clones were attacked by Empoasca sp. However, PGL 4 was consistently the most sensitive and PGL 15 was the most resistant, while others showed moderate resistance against the pest attack. Ketahanan relatif enam belas nomor terpilih klon teh PGL terhadap serangan Empoasca sp. telah dikaji di kebun teh Pagilaran. Enam nomor klon terpilih dan unggul adalah PGL4, PGL6, PGL9, PGL10, PGL11, PGL15, dan 10 nomor terpilih lainnya adalah PGL1, PGL2, PGL3, PGL5, PGL7, PGL8, PGL12, PGL13, PGL14, dan PGL16. Stadia pertumbuhan tanaman teh uji adalah stadia produksi sehingga telah beberapa tahun mengalami serangan Empoasca sp. Kajian dilaksanakan dalam musim kemarau selama bulan September 2011–November 2011, ketika kondisi iklim mendukung peningkatan populasi hama ini. Tingkat populasi hama yang moderat sesuai untuk melakukan kajian. Afdeling Pagilaran dipilih sebagai arena kajian karena tingkat populasi Empoasca sp. moderat (3,74 ekor/20 ayunan jaring serangga). Sementara itu di afdeling Andongsili populasi hama ini rendah (1,70 ekor/20 ayunan jaring serangga) dan di afdeling Kayulandak sangat tinggi (9,81 ekor/20 ayunan jaring serangga). Kriteria ketahanan ditentukan berdasarkan hasil analisis statistik populasi Empoasca sp. Hasil kajian menunjukkan bahwa semua klon PGL terserang oleh Empoasca sp., tetapi PGL 4 konsisten paling peka dan PGL 15 paling tahan, sementara 14 klon lain menunjukkan ketahanan moderat terhadap serangan hama ini.

Pertimbangan Fluktuasi Populasi dalam Perhitungan Efikasi Pestisida Edhi Martono
Jurnal Perlindungan Tanaman Indonesia Vol 5, No 1 (1999)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.9968

Efficacy trials are carried out to secure registration and distribution permit for pesticides in a given country. In Indonesia, the protocol exclusively relies on the statistical difference between treatments and check plots, with little regard to before-treatment population. The efficacy criterion and its defined formulas with more attention to population changes are available, and should be applied to increase the efficacy’s accuracy.

Kloning Gen Coat Protein SMV dengan Pendekatan PCR Sismindari Sismindari; Sudjadi Sudjadi
Jurnal Perlindungan Tanaman Indonesia Vol 2, No 1 (1996)
Publisher : Universitas Gadjah Mada

SMV is RNA virus had to be converted to the first strand DNA using oligo (dT) and murine reverse transcriptase. Amplification of coat protein gene region was carried out by Polimerase Chain Reaction (PCR) with two primers, 5’-TACATCTTGGAACCAATGGCAGGCAAGGAGAGAAG-3’ and 5’-AGGACAACAAACATTGCCG-3’. The PCR product was blund ended by S1 nuclease, and ligated into SmaI digested pUC18 and phosphatase treatment by calf intestine phosphatase. Ligation mixture was used to transform E. coli DH5α. Recombinant plasmid was digested with EcoRI and HindIII showed 0,8 kb fragment. Southern blot analysis at high strigency using PCR using PCR product as a probe shows that the 0,8 kb fragment produced intense signal.

Analisis Variabilitas Genetik Rigidoporus microporus (Jamur Akar Putih) pada Karet dengan Teknik PCR-RFLP Fragment ITS Ria Novianti; Haryono Semangun; Ferry F. Karwur; Martanto Martosupono
Jurnal Perlindungan Tanaman Indonesia Vol 17, No 1 (2011)
Publisher : Universitas Gadjah Mada

The eleven isolates studied fell into two groups, which showed that the fungus did not have high genetic variability. Isolates from diseased rubber trees in shorter vicinities, which were due to pathogen’s vegetative spread through root contact, have close genetic relationship. Meanwhile isolates from far apart trees, either in one estate or from different islands, does not necessarily have distant genetic relationship. It might be due to the fact that long distance dispersal of the disease could also due to rhizomorph contaminating rubber stumps. PCR-RFLP Fragment ITS Techniques can be applied to study genetic relationship of Rigidoporus microporus isolates. It is expected that the technique will be applied with more isolates from different provinces by using additional different restriction enzymes.

Determination of the Factors in Diapause Initiation of White Rice Stem Borer Teddy Suparno
Jurnal Perlindungan Tanaman Indonesia Vol 5, No 1 (1999)
Publisher : Universitas Gadjah Mada

The objective of this research was to determine the important factors in white rice stem borer larvae, Scirpophaga innotata Walker, entering diapause. The results indicates that white rice stem borer (WRSB) larvae feed on rice plants IR64 grown on soils with continual watering which exposed at short day length (11.76 hours at June 21, 1994) will not be in diapause. However, terminated watering 75 days after transplanting or 15 days after flowering on the host growth media caused diapause. These terminated watering caused declining of soil moisture progressively which had direct effect on rice stem water content, and so affected significantly the increase of abscisic acid (ABA). A changes of primary metabolites (protein, lipid, and methionine) did not cause diapause. The secondary metabolite ABA had juvenile hormone activity in the insects larvae, progressively increased in its content in the rice stem caused the percentage of larval diapause of WRSB to increase. The role of ABA in diapause initiation of WRSB needs more study.

Heritabilitas Sifat Ketahanan terhadap Cekaman Alelopati Gulma Teki pada Padi Gogo Supriyanta Supriyanta
Jurnal Perlindungan Tanaman Indonesia Vol 8, No 1 (2002)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.10106

Purple nut sedge (Cyperus rotundus L.) is the most difficult weed to control that produces suppressive allelochemicals to germination and early growth of upland rice. This research is aimed to identify responsive variables of upland rice varieties in competing allelopathy of purple nut sedge and estimate their heritability through mean-parents-offspring regression. The research conducted in two stages of experiment. First stage experiment is aimed to identify a critical level of purple nut sedge suppression and estimate of genetic variability among upland rice lines in responding purple nut sedge allelopathy, conducted in Completely Randomized Design with 25 lines and three replications. Experiment consisted of germination testing by tuber purple nut sedge crude extract with six concentration levels of suppression: 0, 5, 10, 15, 20 and 25%, and of competition treatment between upland rice and purple nut sedge with four levels of suppression based on sampled purple nut sedge tuber number: 0, 6, 12 and 24 tubers. Based on first stage experiment, critical level of suppression is identified at 5% of ethanol tuber extract and 6 tubers of purple nut sedge in competition treatment. Second stage experiment is screening of F1 plants and their respective parents at critical level of suppression. Plumulae length could be an effective selection criterion because of its high narrow-sense heritability (h2 = 0.73).

Virulensi beberapa Isolat Colletotrichum musae terhadap Buah Pisang dan Ketahanan Beberapa Buah Kultivar Pisang terhadap Colletotrichum musae Toekidjo Martoredjo
Jurnal Perlindungan Tanaman Indonesia Vol 1, No 1 (1995)
Publisher : Universitas Gadjah Mada

Colletotrichum musae was isolated from banana cultivar of Ambon Hijau, Ambon Kuning, Emas, Gabu, Kepok, Kidang, Raja Gintung, Raja Sepet, Raja Temen, Raja Uter, Susu, and Tanduk. Virulency test showed that Raja Sepet, Raja Temen, and Susu C. musae isolates much more virulent than Tanduk isolate, while Ambon Kuning isolates its virulent is between two those groups. So Raja Sepet isolate is the highest virulent isolate and Tanduk isolate is the lowest virulent one. Resistancy test showed that Raja Temen, Ambon Hijau, and Raja Uter banana cultivars are much more resistant than Raja Gintung and Tanduk banana cultivars, while Raja Lumut, Kepok, Susu, Ambon Kuning, and Raja Uter banana cultivars their resistancy are between two those groups. So Ambon Hijau banana cultivar is the highest resistant banana cultivar and Tanduk banana cultivar is the lowest resistant one.

Sumbangan Pengenalan Waktu Tradisional “Pranata Mangsa” pada Pengelolaan Hama Terpadu Sukardi Wisnubroto
Jurnal Perlindungan Tanaman Indonesia Vol 4, No 1 (1998)
Publisher : Universitas Gadjah Mada

Cropping pattern and time of planting are two of several factors supporting Integrated Pest Management (IPM). Pranata Mangsa (PM) is a Javanese traditional time reckoning which has existed since some thousand years ago but formally as a calendar was socialized by the King of Surakarta in June 22, 1855. PM has twelve mangsas (similar to a month for other calendar system). Some farmers in Central Java, especially around Surakarta, still use this time reckoning system as a guidance for their activities including the agricultural ones. This system for example enables people to predict the beginning of wet and dry season and also to determine the best time for rice planting to escape from pests and diseases. Based on the information collected in Boyolali district, Central Java, it is known that there is a relationship between mangsa indicators with the attack intensity of rice stemborers.

Efektivitas Trichoderma spp. sebagai Pengendali Hayati terhadap Tiga Patogen Tular Tanah pada Beberapa Jenis Tanaman Kehutanan S. M. Widyastuti; Sumardi Sumardi; P. Sumantoro
Jurnal Perlindungan Tanaman Indonesia Vol 7, No 2 (2001)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.10072

The experiment was aimed to compare Trichoderma spp. with fungicides in the control of soil-borne pathogens and to evaluate the inhibitory effect of the fungicides on the activity of Trichoderma spp. The first objective was achieved by applying antagonistic test of three isolates of Trichoderma spp. and inhibitory growth test of fungicides both against soil-borne pathogens. The second objective was attained by growing Trichoderma spp. on growth medium containing four level of fungicides. The results showed that three isolates of Trichoderma were comparable to fungicides in their ability to inhibit root rot pathogens. T. koningii at a concentration of 103 spores/ml performed the same level of growth inhibition with that of 0.2 ppm captafol against Rigidoporus lignosus. T. reesei at a concentration of 104 spores/ml gave same inhibition effect with that of 25 ppm benomyl against Ganoderma sp., and T. harzianum at a concentration of 105 spores/ml had the same inhibition effect against Sclerotium rolfsii with captafol at a concentration of 20 ppm. The results also showed that fungicides could affect the activities of Trichoderma on the medium. Benomyl promoted the growth of T. reesei and T. harzianum at a concentration of 0.2 ppm while at a concentration of 20 ppm both of them could not grow.

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Home Page

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Contact Name Y. Andi Trisyono

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Editorial Address Jalan Flora No. 1, Bulaksumur, Sleman, Yogyakarta, 55281

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

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Contact Name
Y. Andi Trisyono

Contact Email
anditrisyono@ugm.ac.id

Phone
+62274-523926

Journal Mail Official
jpti.faperta@ugm.ac.id

Editorial Address
Jalan Flora No. 1, Bulaksumur, Sleman, Yogyakarta, 55281

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA