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INDONESIA
Journal of Agricultural Science and Biotechnology
Published by Universitas Udayana
ISSN : 23020113     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Mempublikasikan hasil-hasil penelitian yang berbasis bioteknologi dalam pemanfaatannya dibidang pertanian, termasuk biological control, pascapanen, serta semua penelitian tentang pemanfaatan komponen biologi yang dikemas dalam teknologi dalam lingkup pertanian secara luas.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 4 No 1 (2015)" : 5 Documents clear
POTENSI RIZOBAKTERI YANG DIISOLASI DARI RIZOSFER TANAMAN PADI SEBAGAI AGEN HAYATI UNTUK MENGHAMBAT PERTUMBUHAN JAMUR Pyricularia oryzae, PENYEBAB PENYAKIT BLAS PADA TANAMAN PADI Valente Quintao; Dewa Ngurah Suprapta; I Gede Rai Maya Temaja; Khamdan Khalimi
Journal of Agricultural Science and Biotechnology Vol 4 No 1 (2015)
Publisher : Journal of Agricultural Science and Biotechnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.758 KB)

Abstract

Rice (Oryza sativa L.) is one of the staple foods for more than 60 percent of world population. Indonesian people generally are still depending on the availability of rice to fulfill Indonesian food demand. The average of rice productivity in Indonesia is 4.56 ton/ha which is relatively lower when compared with other rice growing countries, such as Australia 8.22 ton/ha;  Japan 5.85 ton/ha and China 6.06 ton/ha. One of the causes for the low productivity of rice in Indonesia is the occurrences of rice blast disease caused by Pyricularia oryzae.  To control this disease, the farmers are still rely on the use of synthetic fungicides however this measure can not effectively control the disease,  and potentially cause the health and environmental problems. It is necessary to find an alternative measure  that save to human health as well as friendly to the environment. This study was  done to evaluate the potential use of rhizobacteria isolated from rhizospheres of rice as antagonist against Pyricularia oryzae the  cause of rice blast disease.  The result showed that five isolates of rhizobacteria namely  Xanthomonas lumininescens isolate Ch3Da, Serratia liquefaciens isolate Gh13DaB, Enterobacter agglomerans isolate Gg14DtB, Enterobacter agglomerans isolate Ch2Da, and Enterobacter agglomerans isolate Ch4BaB significantly (P<0.05) inhibited the growth of Pyricularia oryzae on potato dextrose agar (PDA) medium with inhibitory activity varied from 39.46% to 46.66%. All of these isolates produced extra cellular substances which probably responsible for the inhibitory activity. This result suggested that five isolates of rhizobacteria tested in this study can be further developed as bio-control agent to reduce the development of rice blast disease.
PENGARUH PENGGUNAAN BARIER NET BERWARNA (MERAH DAN PUTIH) TERHADAP POPULASI Bemisia tabaci PADA TANAMAN CABAI RAWIT (Capsicum frutescens L.) DI DESA KERTA Made Mika Mega Astuthi; I Putu Sudiarta; I Dewa Nyoman Nyana; Gede Suastika
Journal of Agricultural Science and Biotechnology Vol 4 No 1 (2015)
Publisher : Journal of Agricultural Science and Biotechnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.317 KB)

Abstract

The research about impact of using barrier of net color (red and white) for whitefly population on cayenne pepper plant in Kerta Village was conducted in order to know firstly about species of whitefly that existing on the cayenne pepper, secondly to know about impact of net color for populations of whitefly on the cayenne papper. The research was done using the randomized block design (RBD) with 3 treatments and 9 replications. The observation covered of the population of whitefly and symptom of virus infection. The results of this research showed whitefly were identified as Bemisia tabaci. The result indicated the lowest average populations of Bemisia tabaci occurred in the white net barrier treatment.
APLIKASI CAMPURAN BIOURIN DENGAN AGEN PENGENDALI HAYATI UNTUK MENINGKATKAN PRODUKTIVITAS TANAMAN SAWI HIJAU (Brassica rapa Var. Parachinensis L.) I Gusti Agung Oka Hendrawati; I Made Sudana; G N Alit Susanta Wirya
Journal of Agricultural Science and Biotechnology Vol 4 No 1 (2015)
Publisher : Journal of Agricultural Science and Biotechnology

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Abstract

The research was conducted in Pancasari Village, District Sukasada, Buleleng regency from July to November 2013. Purpose of this study was to determine the effectiveness of combination of bio urine with biological control agent in improving productivity and control pests and diseases in greens mustard plants. This study used a randomized block design (RBD) with one bio urine treatment factors, namely bio urine added crushed with Balinese spices (base genep), crushed mimba leaves, crushed leaves of the sour sop, chopped tobacco leaves, Bacillus thuringiensis, Trichoderma viride, Beauveria sp., bio urine without a mixture of biological control agents, chemical pesticides and is equipped with controls (just doused with water). The results of this study showed that bio urine with combination of the biological control agent variables significantly application of affect to plant height, leaf area index, chlorophyll quantity, above-ground fresh weight, fresh roots weight, above-ground dry weight, root dry weight, the percentage of club root, number of leaves damaged, the intensity of leaf damage and abundance imago of Liriomyza sp. Based on these results of this research it can be concluded that the treatment bio urine can control pest grasshoppers, control club root disease and improve productivity of greens mustard.  
POTENSI RIZOBAKTERI YANG DIISOLASI DARI RIZOSFIR TANAMAN GRAMINAE NON-PADI UNTUK MEMACU PERTUMBUHAN BIBIT PADI Ni Made Intan Maulina; Khamdan Khalimi; Gusti Ngurah Alit Susanta Wirya; Dewa Ngurah Suprapta
Journal of Agricultural Science and Biotechnology Vol 4 No 1 (2015)
Publisher : Journal of Agricultural Science and Biotechnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.096 KB)

Abstract

Rice (Oriza sativa L.) is the main food for Indonesian people, however the rice production is not enough to fulfill all national demand. Rice productivity in Indonesia was about 4,5 ton/ha, relatively low when compared to other rice growing countries such Australia, Japan, and China. It is necessary to find a measure to increase the rice productivity in Indonesia. One of the Measure is the use of rhizobacteria isolated from the rhizozpheres of the plants belongs to the family Graminae. This study was done in order to find potential rhizobacteria from rhizospheres of five plant species belong to the family Graminae, namely Cymbopogon ciatrus, Imperata cylindrica, Saccharum officinarum, Pennisetum purpureum and Schizostachum mosum. Result of this study showed that 10 isolates of rhizobacteria obviously increased the number of lateral roots of rice seedling cultivar Ciherang. The rice seedling treated with isolate Al7Kla produced the highest number of lateral roots when compared to other isolates. This isolate may be used to promote the rice growth in order to increase the yield.
PENGENDALIAN PENYAKIT VIRUS PADA TANAMAN CABAI RAWIT (CAPSICUM FRUTESCENS L.) DENG¬AN MULSA PLASTIK HITAM DAN PERAK Dewa Nyoman Darmayasa; I Gede Rai Maya Temaja; I Dewa Nyoman Nyana; Gede Suastika
Journal of Agricultural Science and Biotechnology Vol 4 No 1 (2015)
Publisher : Journal of Agricultural Science and Biotechnology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.546 KB)

Abstract

The research of virus diseases management in chili pepper plant (Capsicum frutescens L.) by utilizing black and silver plastic mulch, was conducted in order to find the capability of black and silver plastic mulch in controlling virus diseases in chili pepper plant and also to find the capability of black and silver mulch in increasing yield of chili pepper plant. This research used randomized block design with 3 treatments and 9 replications. The result of the research shows that utilization of silver plastic mulch had ability to control virus diseases indirectly. The yield of chili pepper has incrising up to 143% with silver plastic mulch treatments.

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