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Buletin Iptek Tanaman Pangan
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Articles 10 Documents
Search results for , issue "Vol 11, No 2 (2016): Desember 2016" : 10 Documents clear
Biopestisida untuk Pengendalian Hama dan Penyakit Tanaman Aneka Kacang dan Umbi Sumartini Sumartini
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Abstract

Several types of pests and diseases in food crops must be controlled. Biopesticides use is one component of pest and disease control in an Integrated Pest Management (IPM). Biopesticides in Indonesia are still less popular, many people misinterpret biopesticides as organic farming, although many options of biopesticides are already available. Many botanical pesticides made from extract material herbs or spices are widely available and very popular, such as, galangal, neem and ginger. Since the effectiveness of biopesticides can not reach a hundred percent, it is advised to use them only for preventive purposes. Preparing biopesticides requires certain skills, therefore, farmers need to be supervised to be able to produce biopesticides by themselves. If many farmers already apply biopesticides in farming, the environment will less be polluted by toxic substances for humans. The paper reviews the effectiveness, application, constrains, benefits, and opportunities, as well as its development in Indonesia.
Peran Senyawa Metabolit Sekunder Tanaman Padi terhadap Ketahanan Wereng Cokelat (Nilaparvata lugens) Eko Hari Iswanto; R. Heru Praptana; Agus Guswara
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
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Resistance character to brown planthopper (BPH) is one of the main component of farmers’ interest in rice cultivation, because its utilization is convenient, inexpensive and environmental friendly, and, therefore, the technology is rapidly used by farmers in brown planthopper management. Rice resistance to BPH is related with plant secondary metabolite compounds. Oxalic acid, tricin, schaftoside, isoschaftoside and apigenin-Cglycosides have effect to BPH as deterrence, antifeeding and toxicosis. Concentration of those secondary metaboilite is higher in resistant variety than susceptible variety. Every variety has different component and composition of secondary metabolite. With specific plant secondary metabolite as marker, selection proses could be easier and faster in resistance genotype detection in a breeding program.
Peningkatan Kandungan Metabolit Sekunder Tanaman Aneka Kacang sebagai Respon Cekaman Biotik Sulistiyo Dwi Setyorini; Eriyanto Yusnawan
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Secondary metabolites are not considered as essential compounds for plant growth. The increase of secondary metabolites produced by plants is only expressed in certain situations. These compounds are unique and different for each species. Various types of plants, including legume crops are able to produce secondary metabolites in certain situations. Plants produce secondary metabolites as a defense mechanism to stresses, both biotic and abiotic stresses. Biotic stresses that occur on plants can be caused by pests, diseases or weeds. For human, secondary metabolites can be toxic or beneficial compounds depending on the type of compound formed. Secondary metabolites have been used as a medicine, pesticide and become materials for cosmetic production. Legumes can produce secondary metabolite compounds that act as antioxidant for human, so it is necessary to improve these expression. One of the efforts is the use of elicitors. The combination of the elicitors and time of application can be used to improve the production of plant secondary metabolites.
Fusarium pada Tanaman Jagung dan Pengendaliannya dengan Memanfaatkan Mikroba Endofit Suriani Suriani; Amran Muis
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Endophytic microbes reside in the tissue of living plant. They can be isolated from the root, stems and leave of plant. Utilization of endophytic microbes for biological control of plant pathogens has been applied for some times. The ability to compete for space and nutrients and antibiotic production are the two main considerations for the use of endhopytic microbes as biological control to plant pathogens. Several species of endophytic microbes isolated from maize either from the class of fungi, bacteria or actinomycetes include Trichoderma spp., PenIicillium sp., Bacillus spp., dan Altenaria alternata. The microbes have been reported by some researchers to be effectively suppressing the development of pathogens Fusarium spp. which causes stem rot, cobs and grain maize. Endophytic microbes have a good prospect to be developed as maize disease control because they are affordable and environmentally friendly.
Ketahanan Terimbas Tanaman Kacang-kacangan terhadap Penyakit Alfi Inayati
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Legumes have an important role especially as a source of nutrition, important in maintaining soil quality, and as animal feed. Although the production and the needs for legumes continues to rise, the productivity especially at the farm level is still low. This is mainly due to pests and diseases infections and also the soil infertility effects. Yield losses due to pests and diseases is quite high up to 80%. Induced resistance is one effort to control the disease and improve the growth quality of legumes. Various elicitors (biotic and abiotic) and induced mechanisms have been tested and reported to give promising results. Induced resistance was reported to increase the resistance of leguminous plants against pathogen infection such as fungi, bacteria, and viruses that are transmitted through soil, seed-borne, and from the surface of the leaves, such as: Sclerotium rolfsii, Rhizoctonia solani, Fusarium sp, Aspergillus flavus, Cercosporidium personatum, Xanthomonas axonopodis, peanut mottle virus, and soybeant stunt virus. Recently, the use of induced resistance in Indonesia is very limited. The use of Trichoderma sp, non-pathogenic Fusarium, and Pseudomonas fluoroscent as biocontrol agents has been started although in a limited numbers. In the future, induced resistance will become one component that is important in controlling the disease in an integrated pest management.
Pemuliaan Padi Gogo Adaptif pada Lahan Kering Aris Hairmansis; Yullianida Yullianida; Supartopo Supartopo; Suwarno Suwarno
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Upland area in Indonesia has a great potential for rice production. However, only a small portion of the potential upland area has been utilized for rice cultivation with very low productivity. The availability of new technologies in rice management is very important to increase rice production in this marginal area. Improved rice variety is among the most important technologies which has to be introduced to the farmers in upland areas. Upland rice breeding program aims to develop improved rice varieties which are tolerant to diverse abiotic stresses including soil acidity, nutrient deficiency, aluminium toxicity, drought, low light intensity and low temperature. Another important trait in upland rice breeding program is the resistance to blast disease which is the most devastating disease in humid upland area. The increase in genetic diversity of improved rice varieties to blast disease is the key to control the disease. A significant number of improved upland rice varieties have been developed through the breeding program in Indonesian Agency for Agricultural Research and Development. The future challenge in the development of upland rice is the delivery of the high-quality seeds of improved rice varieties to the farmers due to the lack of support from formal seed system in upland areas. Until now upland rice areas are still dominated by traditional varieties and modern varieties which are not developed for upland area but their seeds available in market. Community Based Seed System has been initiated to be implemented in upland area to overcome the problem. Through a strong support from breeding program and proper seed system it is expected the potency of upland rice in Indonesia could be maximized to support the sustainability of rice production in the country.
Interaksi Bakteri Antagonis dengan Tanaman: Ketahanan Terinduksi pada Tanaman Jagung Nurasiah Djaenuddin
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Abstract

Biological control against soil-borne pathogens is an option to reduce disease activity by pathogens through one or more resistance mechanisms. In the last two decades, interest in biological control usage against soil borne plant pathogens has increased because this approach can control disease not only solely, but can also be combined with other strategic control. Colonization of plant roots is an important step for soil borne pathogens and beneficial bacteria (bacterial antagonists and rhizobacteria). Colonization patterns indicate that rhizobacteria act as a biocontrol agent or as a growth promoter bacteria formation of microcolonies. Microcolonies are used as the media for bacteria to interact one with another in order to effectively coincide with the root exudates. Elicitation or the process of adding elicitor (chemical compounds) in the plant cell is aimed to induce and enhance the establishment of secondary metabolites, initially shown by Pseudomonas spp. and other gram-negative bacteria. Some strains of the species Bacillus subtilis, B. cereus and B. pumilus elicit significantly the incidence or severity of various diseases in a variety of host plants. Elicitation of systemic induced resistance by these strains is shown in experiments in the greenhouse or in the field on maize, rice, tomatoes, watermelon, and cucumber. Elicitation by Bacillus spp. wasreported to establish induced systemic resistance mechanisms in plants affected by leaf spot fungus and bacteria, viruses, nematodes, damping off and blight disease. With the advancement of this knowledge, one can explore strains of bacterial species efficiently use as advantageous agents in biological control strategy.
Pembentukan Varietas Padi Sawah Dataran Tinggi Toleran Cekaman Suhu Rendah Gunarsih, Cucu; Nafisah, Nafisah; Sitaresmi, Trias
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
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Abstract

Low temperature becomes major constrain for rice production in high elevation. This condition causes losses because of grain filling problem. Sub-species of japonica have a low temperature tolerance, which is better than indica. Indica subspecies are most grown widely in Indonesia. Low temperature tolerance is an important character, because it is one of issue that needs more attention on plant breeding program. Indonesia local varieties with low temperature tolerance are Sarinah, Pulu ‘Mandoti, Pinjan and Lambau. Indonesian Center for Rice Research released a number of varieties tolerant to low temperature (for > 700 m asl) and early maturity, namely Batang Piaman, Inpari 26, Inpari 27 and Inpari 28 Kerinci. Developing irrigated rice varieties for low temperature tolerant by utilizing local varieties, introduction, crossbreeding and biotechnology provides opportunities to obtain low temperature tolerant varieties. In developing improved varieties for high elevation, it is recommended to use genetic materials with good seed vigor, moderate plant height, well exerted panicle, uniformity in flowering, and high fertility. Developing of new varieties tolerant to low temperature through conventional breeding approach requires longer time. However, conventional breeding has an important role in producing tolerant varieties, although physiological mechanism of the tolerance is not much known. Therefore, molecular genetics and biotechnology as more advanced approach are needed for supporting rice breeding program for abiotic stresses.
Peranan Bahan Organik dalam Peningkatan Produksi Kedelai dan Ubi Kayu pada Lahan Kering Masam Muzaiyanah, Siti; Subandi, Subandi
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
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Increased production of soybean and cassava can be reached by alternatively extending cultivation to suboptimal land, such as upland acid soil, where amelioration of organic material is an attempt to improve soil fertility. The sources of organic material can be obtained from the agricultural and non-agricultural waste, such as: compost and manure. Organic materials are not only beneficial for improving the chemical, physical, physico-chemical and biological soil characters, but also capable of supporting plant growth to produce higher yields in soybean and cassava.
Varietas Unggul Padi Tahan Hawar Daun Bakteri: Perakitan dan Penyebaran di Sentra Produksi Rina Hapsari; Untung Susanto; Satoto Satoto
Iptek Tanaman Pangan Vol 11, No 2 (2016): Desember 2016
Publisher : Puslitbang Tanaman Pangan

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Abstract

Bacterial leaf blight or BLB (Xanthomnas oryzae pv. oryzae or Xoo) is one of the main diseases in riceproducing countries, including Indonesia. Development of resistant varieties is an effective approach to be done in endemic areas of BLB. Breeding program for bacterial leaf blight resistant varieties could be effective by utilizing bioassay technique screening, selection in endemic areas, and MAS technique. The resistant varieties to be grown in some regions should have considered the composition of Xoo. Several resistant varieties have been released and those varieties can be recommended for endemic areas of BLB with a specific composition.

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