Geographic expansion of banana Blood disease in Southeast Asia

Plant Disease ◽  
2021 ◽  
Author(s):  
Jane Denise Ray ◽  
Siti Subandiyah ◽  
Vivian A Rincon-Florez ◽  
Ady B Prakoso ◽  
Wayan I Mudita ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Rapid Expansion ◽  
Single Infection ◽  
Banana Fruit ◽  
Long Distance ◽  
Banana Production ◽  
Blood Disease ◽  
Infection Source ◽  
Banana Variety ◽  
Green Banana

Blood disease in bananas caused by Ralstonia syzygii subsp. celebesensis is a bacterial wilt causing significant crop losses in Indonesia and Malaysia. Disease symptoms include wilting of the plant and red brown vascular staining, internal rot, and discoloration of green banana fruit. There is no known varietal resistance to this disease in the Musa genus, although variation in susceptibility has been observed, with the popular Indonesian cooking banana variety Kepok being highly susceptible. This study established the current geographic distribution of Blood disease in Indonesia and confirmed the pathogenicity of isolates by Koch's Postulates. The long-distance distribution of the disease followed an arbitrary pattern indicative of human-assisted movement of infected banana materials. In contrast, local or short distance spread radiated from a single infection source, indicative of dispersal by insects and possibly contaminated tools, water or soil. The rapid expansion of its geographical range makes Blood disease an emerging threat to banana production in Southeast Asia and beyond.

scholarly journals Increase Banana Production with Various Applications of Organic Fertilizers

2017 ◽  
Vol 1 (1) ◽  
pp. 12
Author(s):  
I Nyoman Sunarta ◽  
Ni Made Trigunasih
Keyword(s):  
Organic Fertilizer ◽  
Optimal Growth ◽  
The Body ◽  
Organic Fertilizers ◽  
Banana Fruit ◽  
Banana Plant ◽  
Random Group ◽  
Sustainable Food ◽  
Banana Production ◽  
Chicken Waste

Banana is a fruit that must be present in every activity of the Balinese people. Almost in every cultural and religious activity it is compulsory to present the banana fruit, even more Bali as a tourism area really need fruits including bananas. Therefore the need of bananas is highly demanded in traditional markets or supermarkets in Bali. Until now, the banana production in Bali is far below demand, therefore we still import form places outside of Bali. Banana has a high nutrient value due to nutrients found in it such as potassium and folic acid that is needed by the body. It is also a good so urce of calcium, phosphor, nitrogen, and vitamins such as vitamin A, vitamin C, and B complexes which helps to repair and regenerate tissues of the body. Banana plants can grow in many places, from low grounds until highlands and in various types of soil. Nevertheless for the optimal growth; fertile soil, crumbly thick, lots of humus, aeration, and a good drainage as well as enough water is all needed. By optimizing land use, banana plants are often planted as a sideline plant for plantatio n of coconut, cocoa, and coffee, as well as sideline plants for many other in-between plantations. The way of planting the banana is a conventional method that is commonly used by local farmers including those in the Angkah village. For growth of banana plants we must consider and ensure before planting a crumbly soil when it is solid, to make drainage, and to make levels in slopes. During plantation organic/compost fertilizers is needed as much as 15-20 kg for each hole for plantation. Organic fertilizers that are added influences the good production for both quantity and quality which makes the fruit tastier and has a higher nutritional value. There are some types of organic fertilizers that are used in this research that are: cow waste organic fertilizer, chicken waste organic fertilizer, pig waste organic fertilizer, goat waste organic fertilizer, and compost fertilizer with a dosage of 15 kg per plant. The placement of fertilizers for each places of treatment is conducted b y using a Random Group Design (RGD). The total treatments are 6 and are repeated 3 times. Planting is conduct ed on the 7th of July 2016 with a ground hole size of 60cmx60cm and a depth of 50 cm. The seedlings that are used are decedents that are 50-65cm in height. The specific aim that is wished to be achieved is the increase production of banana as sustainable food in Indonesia. The result up to the progress of this research was found that treatment with chicken waste fertilizer has given the best influence for growth of the banana plant, increased number of leaves, as well as increased height of the plants, all compared to the controlled. The increment of banana plant with chicken waste fertilizer was 63.33 cm for 3 months.Keywords: Banana, Nutritional Values, Production, Organic Fertilizer

scholarly journals Long-Distance Obsidian Trade in Indonesia

1996 ◽  
Vol 462 ◽  
Author(s):  
Robert H. Tykot ◽  
Stephen Chia
Keyword(s):  
Southeast Asia ◽  
Multiple Sources ◽  
Long Distance ◽  
Trade Networks ◽  
Southwest Pacific ◽  
The World ◽  
Trade Route

ABSTRACTLong-distance trade in obsidian from sources in the southwest Pacific has been well-documented for the Lapita culture complex, beginning about 1600 BC. Analyses of obsidian artifacts from recent excavations at Bukit Tengkorak in southeastern Sabah (Borneo, Malaysia) indicate the use of obsidian from multiple sources in Melanesia as early as the 5th millennium BC. The archaeological presence of obsidian, up to more than 3500 km from its source, is the surviving evidence of what was almost certainly the longest Neolithic trade route in the world. In addition, these results indicate that long-distance trade networks existed in Indonesia at least 2500 years prior to the Lapita culture, and strengthen hypotheses of its origins in southeast Asia.

XII. Chinese Financiers and Chetti Bankers in Southern Waters: Asian Mobile Credit during the Anglo-Dutch Competition for the Trade of the Eastern Archipelago in the Nineteenth Century

Itinerario ◽  
1987 ◽  
Vol 11 (1) ◽  
pp. 209-234 ◽  
Author(s):  
Rajat Kanta Ray
Keyword(s):  
Nineteenth Century ◽  
Southern Ocean ◽  
Southeast Asia ◽  
Early Modern ◽  
Large Volume ◽  
Business Groups ◽  
Business Organization ◽  
Long Distance ◽  
Modern Capitalism ◽  
Before And After

Certain European notions of the nature of the Asian economies — especially the peddling character of Asian trade and its contrast with the rational capitalist business organization which was supposed to be a purely European enclave superimposed by conquest on the peddling, precapitalist basis of Asian production and exchange — were formulated most clearly of all by Dutch sociologists and economists from their experience of Netherlands India of the nineteenth century and of the Eastern Archipelago in the age of Portuguese and Dutch voyages. They were not unaware of the existence of Chinese and Indian business groups in Southeast Asia with some of the features of early modern capitalism, but these were regarded as the bastard offspring of developed European capitalism. Such immigrant Asian groups were supposed to have sprung from the need of the Europeans for intermediaries to deal with the economically innocent natives and were thought to be completely dependent on servicing the European enclave with no autonomous business concerns of their own. This essay focusses on the Chinese financiers and Chetti bankers operating long distance credit networks in the Southern Ocean (Nanyang) before and after the opening of the Suez Canal (1869). The aim is to show that these immigrant business groups derived from a sophisticated financial and mercantile background in their home countries and that they conducted autonomous operations in the Eastern Archipelago with their own capital and business techniques: a large volume of such operations were conducted within a purely inter-Asian framework quite apart from the colonial trade with Europe, and in their dealings with the Dutch and the English banks and corporations, these towkays and nagarathars showed a strength and resilience which made ‘dependence’ and ‘collaboration’ a mutual process.

scholarly journals Ethylene Production by Slices of Green Banana Fruit and Potato Tuber Tissue During The Development of Induced Respiration

1969 ◽  
Vol 22 (2) ◽  
pp. 489 ◽  
Author(s):  
WB Mcglasson
Keyword(s):  
Ethylene Production ◽  
Plant Tissues ◽  
Underground Storage ◽  
Banana Fruit ◽  
Physiological Changes ◽  
Tissue Slices ◽  
Tuber Tissue ◽  
Plant Parts ◽  
Storage Organs ◽  
Green Banana

It is well known that injury and infection by disease organisms may stimulate ethylene production by plant tissues (Williamson 1950; Burg 1962; McGlasson and Pratt 1964). The increased ethylene production which results from injury in fruit tissues may hasten the onset of a respiratory climacteric. This response, which has been observed in slices cut from three-quarter-grown cantaloupe fruit, may herald the commencement of physiological changes leading to natural ripening (McGlasson and Pratt 1964). However, in underground storage tissues, stimulated ethylene production may be concerned with the mechanisms of wound healing (Stahmann, Clare, and Woodbury 1966; Imaseki, Uchiyama, and Uritani 1968). The phenomenon of induced respiration in tissue slices of bulky underground storage organs has been known for many years (Laties 1967) and more recently it has been found to occur in sections or slices of other plant parts (ap Rees 1966). Palmer and McGlasson (1969) observed a similar rise in slices of green banana fruit which they considered to be a form of "induced" respiration.

scholarly journals Isoprene emissions over Asia 1979–2012: impact of climate and land use changes

2013 ◽  
Vol 13 (11) ◽  
pp. 29551-29592 ◽  
Author(s):  
T. Stavrakou ◽  
J.-F. Müller ◽  
M. Bauwens ◽  
I. De Smedt ◽  
M. Van Roozendael ◽  
...  
Keyword(s):  
Land Use ◽  
Solar Radiation ◽  
Southeast Asia ◽  
Tropical Forests ◽  
Rapid Expansion ◽  
Top Down ◽  
Bottom Up ◽  
Isoprene Emission ◽  
Oil Palms ◽  
The Impact

Abstract. Due to the scarcity of observational constraints and the rapidly changing environment in East and Southeast Asia, isoprene emissions predicted by models are expected to bear substantial uncertainties. The aim of this study is to improve upon the existing bottom-up estimates, and investigate the temporal evolution of the fluxes in Asia over 1979–2012. To this purpose, we calculate the hourly emissions at 0.5° × 0.5° resolution using the MEGAN-MOHYCAN model driven by ECMWF ERA-Interim climatology. This study incorporates (i) changes in land use, including the rapid expansion of oil palms, (ii) meteorological variability according to ERA-Interim, (iii) long-term changes in solar radiation (dimming/brightening) constrained by surface network radiation measurements, and (iv) recent experimental evidence that South Asian tropical forests are much weaker isoprene emitters than previously assumed, and on the other hand, that oil palms hold a strong isoprene emission capacity. These effects lead to a significant lowering (factor of two) in the total isoprene fluxes over the studied domain, and to emission reductions reaching a~factor of 3.5 in Southeast Asia. The bottom-up annual isoprene emissions for 2005 are estimated at 7.0, 4.8, 8.3, 2.9 Tg in China, India, Indonesia and Malaysia, respectively. Changes in temperature and solar radiation are the major drivers of the interannual variability and trend in the emissions. An annual positive flux trend of 0.2% and 0.52% is found in Asia and China, respectively, through the entire period, related to positive trend in temperature and solar radiation. The impact of oil palm expansion in Indonesia and Malaysia is to enhance the trends over that region, e.g. from 1.17% to 1.5% in 1979–2005 in Malaysia. A negative emission trend is derived in India (−0.4%), owing to the negative trend in solar radiation data associated to the strong dimming effect likely due to increasing aerosol loadings. The bottom-up emissions are evaluated using top-down isoprene emission estimates derived from inverse modelling constrained by GOME-2/MetOp-A formaldehyde columns through 2007–2012. The satellite-based estimates appear to support our assumptions, and confirm the lower emission rate in tropical forests of Indonesia and Malaysia. Additional flux measurements are clearly needed to better characterize the spatial variability of emission factors. Finally, a decreasing trend in the top-down Chinese emissions inferred after 2007, is in line with the cooling episode recorded in China after that year, thus suggesting that the satellite HCHO columns are able to capture climate-induced changes in emissions.

Commercial Networks Connecting Southeast Asia with the Indian Ocean

2021 ◽  
Author(s):  
Tom Hoogervorst
Keyword(s):  
Indian Ocean ◽  
Material Culture ◽  
Southeast Asia ◽  
Global Economy ◽  
Production Systems ◽  
Southeast Asian ◽  
Small Scale ◽  
Long Distance ◽  
Commercial Networks ◽  
The Indian Ocean

Southeast Asian history has seen remarkable levels of mobility and durable connections with the rest of the Indian Ocean. The archaeological record points to prehistoric circulations of material culture within the region. Through the power of monsoon sailing, these small-scale circuits coalesced into larger networks by the 5th century bce. Commercial relations with Chinese, Indian, and West Asian traders brought great prosperity to a number of Southeast Asian ports, which were described as places of immense wealth. Professional shipping, facilitated by local watercraft and crews, reveals the indigenous agency behind such long-distance maritime contacts. By the second half of the first millennium ce, ships from the Indo-Malayan world could be found as far west as coastal East Africa. Arabic and Persian merchants started to play a larger role in the Indian Ocean trade by the 8th century, importing spices and aromatic tree resins from sea-oriented polities such as Srivijaya and later Majapahit. From the 15th century, many coastal settlements in Southeast Asia embraced Islam, partly motivated by commercial interests. The arrival of Portuguese, Dutch, and British ships increased the scale of Indian Ocean commerce, including in the domains of capitalist production systems, conquest, slavery, indentured labor, and eventually free trade. During the colonial period, the Indian Ocean was incorporated into a truly global economy. While cultural and intellectual links between Southeast Asia and the wider Indian Ocean have persisted in the 21st century, commercial networks have declined in importance.

scholarly journals Comparison of Physicochemical Properties of Starches from Flesh and Peel of Green Banana Fruit

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2312 ◽  
Author(s):  
Zheng Li ◽  
Ke Guo ◽  
Lingshang Lin ◽  
Wei He ◽  
Long Zhang ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Water Solubility ◽  
Amylose Content ◽  
Starch Content ◽  
Banana Fruit ◽  
Gelatinization Temperature ◽  
Relative Crystallinity ◽  
Apparent Amylose Content ◽  
Gelatinized Starch ◽  
Green Banana

Green banana fruit is an important starch resource that consists of flesh and peel. The physicochemical properties of flesh starch have been widely studied; however, those of peel starch have hardly been studied, leading to the waste of peel. In this study, the physicochemical properties of the starches from the flesh and peel of green banana fruit were investigated and compared. The dry flesh and peel had 69.5% and 22.6% starch content, respectively. The starch had oval and irregular granules with eccentric hila. Their starches had similar bimodal size distribution; the volume-weighted mean diameter was approximate 17 μm, and the peel starch had a slightly smaller granule size than the flesh starch. The maximum absorption wavelength was higher in peel starch than in flesh starch. The apparent amylose content of flesh and peel starch was 21.3% and 25.7%, respectively. The flesh and peel starches both exhibited B-type crystalline structures and had similar relative crystallinity, short-range ordered degrees, and lamellar structures. The swelling power was similar between flesh and peel starches, but the water solubility was higher in peel starch than in flesh starch at 95 °C. The peel starch had a higher gelatinization temperature than flesh starch, but their gelatinization temperature range and enthalpy were similar. Both flesh and peel starches showed a diphasic hydrolysis dynamic, but peel starch had higher resistance to porcine pancreatic α-amylase hydrolysis than flesh starch. The contents of rapidly digestible starch, slowly digestible starch, and the resistant starch of flesh and peel were 1.7%, 4.3%, 94.1% and 1.4%, 3.4%, 95.2%, respectively, for native starch, and 73.0%, 5.1%, 21.9%, and 72.3%, 4.5%, 23.2%, respectively, for gelatinized starch.

scholarly journals TEST OF BLOOD DISEASE BACTERIUM (BDB) TRANSMISSION BY POTENTIAL INSECT VECTORS

2020 ◽  
Vol 20 (1) ◽  
pp. 71-77
Author(s):  
Betty Sahetapy ◽  
Nina Maryana ◽  
Syafrida Manuwoto ◽  
Kikin H. Mutaqin ◽  
Fransina Latumahina
Keyword(s):  
Plant Protection ◽  
Major Obstacle ◽  
Insect Vectors ◽  
Inoculum Sources ◽  
Banana Production ◽  
Blood Disease ◽  
Pcr Method ◽  
Positive Results ◽  
Transmission Test

Blood disease bacterium (BDB) is one of the important diseases in banana and a major obstacle in developing and increasing banana production in Indonesia. The purpose of this study was to prove the ability of the Drosophilidae insect as a vector in transmitting BDB. The research was conducted at the Insect Biosystematics Laboratory and Plant Bacteriology Laboratory, Department of Plant Protection, Faculty of Agriculture, IPB University. Drosophilidae insects were taken from the field and then reared in laboratory by being fed with ripe bananas to obtain offspring that are free from diseases or pathogens. Imago of the Drosophilidae from rearing was fed by inoculum sources which was infected banana, then inoculated into healthy plants. The plants used were healthy and flowering, heliconia. The results showed that the Drosophilidae insects were able to transmit BDB to heliconia plants that showed symptoms, brownish flower colors and falling flower crowns. Detection of BDB isolated from flower parts and the inside parts of the insects used in transmission test using the PCR method showed positive results.

scholarly journals Evolution of Green Space under Rapid Urban Expansion in Southeast Asian Cities

2021 ◽  
Vol 13 (21) ◽  
pp. 12024
Author(s):  
Amal Najihah Muhamad Nor ◽  
Hasifah Abdul Aziz ◽  
Siti Aisyah Nawawi ◽  
Rohazaini Muhammad Jamil ◽  
Muhamad Azahar Abas ◽  
...  
Keyword(s):  
Spatial Structure ◽  
Southeast Asia ◽  
Urban Areas ◽  
Green Space ◽  
Urban Expansion ◽  
Space Structure ◽  
Rapid Expansion ◽  
Kuala Lumpur ◽  
Metro Manila ◽  
The Impact

Globally, rapid urban expansion has caused green spaces in urban areas to decline considerably. In this study, the rapid expansion of three Southeast Asia cities were considered, namely, Kuala Lumpur City, Malaysia; Jakarta, Indonesia; and Metro Manila, Philippines. This study evaluates the changes in spatial and temporal patterns of urban areas and green space structure in the three cities over the last two decades. Land use land cover (LULC) maps of the cities (1988/1989, 1999 and 2014) were developed based on 30-m resolution satellite images. The changes in the landscape and spatial structure were analysed using change detection, landscape metrics and statistical analysis. The percentage of green space in the three cities reduced in size from 45% to 20% with the rapid expansion of urban areas over the 25-year period. In Metro Manila and Jakarta, the proportion of green space converted to urban areas was higher in the initial 1989 to 1999 period than over the latter 1999 to 2014 period. Significant changes in green space structure were observed in Jakarta and Metro Manila. Green space gradually fragmented and became less connected and more unevenly distributed. These changes were not seen in Kuala Lumpur City. Overall, the impact of spatial structure of urban areas and population density on green space is higher in Jakarta and Metro Manila when this is compared to Kuala Lumpur. Thus, the results have the potential to clarify the relative contribution of green space structure especially for cities in Southeast Asia where only a few studies in urban areas have taken place.

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