scholarly journals Effects of Variety and Postharvest Handling Practices on Microbial Population at Different Stages of the Value Chain of Fresh Tomato(Solanum lycopersicum)in Western Terai of Nepal

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Ram B. Khadka ◽  
Madan Marasini ◽  
Ranjana Rawal ◽  
Durga M. Gautam ◽  
Antonio L. Acedo

Background. Fresh vegetables such as tomato should have low microbial population for safe consumption and long storage life. The aerobic bacterial count (ABC) and coliform bacterial count (CBC), yeast, and mold population are the most widely used microbial indicators in fresh vegetables which should be lower than 4 log CFU g−1for safe consumption. The stages of the supply chain, postharvest handling methods, and crop varieties had significant effects on microbial population. ABC, CBC, yeast, and mold population were significantly highest (P<0.05) at retail market (5.59, 4.38, 2.60, and 3.14 log CFU g−1, resp.), followed by wholesale market (4.72, 4.71, 2.43, and 2.44 log CFU g−1, resp.), and were least at farm gate (3.89, 3.63, 2.38, and 2.03 log CFU g−1, resp.). Improved postharvest practices (washing in clean water and grading and packaging in clean plastic crate) helped to reduce ABC, CBC, and mold population by 2.51, 32.70, and 29.86 percentage as compared to the conventional method (no washing and no grading and packaging in mud plastered bamboo baskets). Among varieties, Pusa ruby had the lowest microbial load of 2.58, 4.53, 0.96, and 1.77 log CFU g−1for ABC, CBC, yeast, and mold count, respectively. Significantly negative correlation (P<0.05) was observed between fruit pH & ABC and pH & mold count. Although the microbial quality of fresh tomato is safe in the local market of western Terai of Nepal both in conventional and in improved practices however still it is essential to follow improved postharvest handling practices in production and marketing of newly introduced tomato cultivars (high-pH cultivars) for ensuring the safe availability of fresh tomato in the market.

2021 ◽  
Vol 15 (6) ◽  
pp. 272-280
Author(s):  
Kunyanga Catherine ◽  
Edgar Kimani David ◽  
Werikhe Grace

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Aregawi Lemlem ◽  
Melkamu Alemayehu ◽  
Mossa Endris

The study was conducted during 2015/2016 in two districts of Afar Regional State which were purposively selected based on their experiences on date palm production and locations relative to Awash River. Objectives of the study were evaluating the existing production practices and constraints of date palm production to generate baseline information for further researches and extension. A total of 117 household heads were interviewed using structured and semistructured questionnaires. Key informant interviews, focus group discussions, and direct observations of date palm plantations have been also conducted. The study was designed to address date palm production along the value chain. The majority of household heads were male, married, and illiterate. About 94.19% of household heads allocated less than one hectare of land for date palm production and had 21–40 years (77.8%) of experience. Seeds (90.6%) were dominantly used for propagation, which are not appropriate for date palm production. Local varieties with low yielding potential were cultivated using flooding irrigation (76.9%). Date palm production was practiced traditionally and constrained with high incidence of insect pests. Capacity building training sessions and researches on proper agronomic, management, and postharvest handling practices are recommended to improve the production of date palm in the region.


2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Isaac Kojo Arah ◽  
Gerald K. Ahorbo ◽  
Etornam Kosi Anku ◽  
Ernest Kodzo Kumah ◽  
Harrison Amaglo

Tomato production has increased in recent years due to the economic and nutritional importance of the crop. This increase is made possible by the numerous research advances made along the entire value chain. However, scientific research has been focussed mainly on production whilst neglecting postharvest issues. Tomato producers have therefore enjoyed good harvests in recent times, though the good harvests of those from developing countries do not translate into profit as most are lost after harvest. From this study, it was revealed that the postharvest quality and shelf life of the fruit in part will depend on some postharvest handling practices and treatments carried out after harvest. Handling practices like harvesting, precooling, cleaning and disinfecting, sorting and grading, packaging, storing, and transportation played an important role in maintaining quality and extending shelf life. Using appropriate postharvest treatments like refrigeration, heat treatment, modified atmosphere packaging (MAP), and 1-methylcyclopropene (1-MCP) and calcium chloride (CaCl2) application was also vital. It was concluded by this study that the quality of the harvested fruit can be maintained and shelf life extended by using appropriate postharvest handling practices and treatment methods. Failure to adhere to these practices will result in a high amount of loss.


Author(s):  
Barbara Antonioli

- The reorganization of the energy market, together with an increase in the mobility of resources and the evolution of supply, have reduced borders between national and local market, and both regulatory policies and players' strategies have to consider these renewed environment. The goal of this paper is to make some considerations about the dimension and the interactions between national and locals, up-stream and downstream energy markets, both in terms of value chain phases regulation and of the impact on firms' organization and on the industry as a whole. We want to highlight evident problems of coordination of different rules, the necessity to define a clear national industrial policy (not fragmented at local level), as well as the relevance of the end user prices regulation for liberalized market. In particular, this kind of regulation seems to represent a key point of the current discussion between operators and the energy Authority. The end users price regulation present some critical aspects related to its (contested) limited contribution to a real price competition but, on the other side, had to be considered as a strong protection for domestic customers, as well as a way to reduce information asymmetry.Key words: Energy, competition, regulation.JEL classifications: H1, K2.Parole chiave: Energia, concorrenza, regolazione.


2012 ◽  
Vol 2 (4) ◽  
pp. 215-227 ◽  
Author(s):  
Sally J. Gustafson ◽  
Gad G. Yousef ◽  
Michael A. Grusak ◽  
Mary Ann Lila

Author(s):  
I. Mumbula ◽  
R. Nyunja ◽  
D. Chungu

Edible insects including termites form a suitable alternative for sustainable provision of animal protein to fight protein-energy malnutrition. It is as cardinal to study the food safety of edible termites as it is for any other food stuff. Twenty seven (27) samples were collected and analysed for total viable counts and Enterobacteriaceae. The microbial load was assessed using culture, microscopic and biochemical methods. The isolates identified in this study include Staphylococcus aureus, Escherichia coli, yeasts other than Candida albicans and Zygomycetes. Investigation of the total viable counts and Enterobacteriaceae of open air traded edible termites revealed loads higher than those recommended for minced meat 5.7 to 6.7 log10 cfu/g. The mean ranges were between 6.87 and 9.29 log10 cfu/g for total viable counts and 6.64 and 8.537 log10 cfu/g for Enterobacteriaceae. The presence of E. coli suggests faecal contamination of the sample along the value chain whereas S. aureus, yeasts other than C. albicans, and Zygomycetes indicate unhygienic handling of the food samples. Heat treatments can reduce the loads but may not be effective for enterotoxins and recontamination of the sample is possible. Poor hygiene and sanitation by handlers may contribute to contamination and recontamination of Edible termites. Food safety and hygiene education on processing and handling practices that reduce microbial loads at collection sites, transportation and display points are important especially since termites are sold as ready to eat foods in African open air Markets. Legislation on open defecation, use of toilets and promotion of hand washing hygiene can effectively reduce the risk of contamination with gastrointestinal microflora from faecal matter.


2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Consolata Nolega Musita ◽  
Michael Wandayi Okoth ◽  
George Ooko Abong’

Postharvest handling of the potato is an important factor not only in preventing postharvest losses but also in maintaining its safety and nutritional quality. Exposure of the potato to unfavorable conditions such as light, extreme temperatures, and bruising can result in accumulation of glycoalkaloids, which are toxic substances. This study was a cross-sectional survey which aimed to investigate the postharvest handling practices of potatoes and perception of potato safety among open air market traders in Nairobi County, Kenya. Information was collected from 100 potato traders using a semistructured questionnaire that assessed postharvest handling practices such as potato transportation, exposure to sunlight, and storage. Results indicated that most of the potatoes (88%) took one day to be transported to the market, with the storage period at the market ranging from 2 to 3 days for most traders (42%). Forty-seven percent (47%) of the vehicles and hand-pulled carts used to transport potatoes had open backs, while 53% had closed backs. Over half (69%) of the potatoes in the markets were directly exposed to sunlight, with 75% of the traders leaving their potatoes in the open covered with a polythene bag after the day’s activities. Greening, sprouting, or bruised potatoes were mostly sold as seed, sold to restaurants and French fries vendors, or sold to consumers at a lower price. More than half of the traders did not think that consumption of greened potatoes is harmful to health. The results clearly show that there is poor handling of the potatoes by the traders which increases the risk of consumer exposure to glycoalkaloids. There is, therefore, a need to create awareness among traders on appropriate postharvest handling of potatoes to protect consumer health and reduce economic losses as well.


2016 ◽  
Vol 12 (2) ◽  
pp. 359-368 ◽  
Author(s):  
MS Islam ◽  
MM Haque ◽  
MG Rabbani ◽  
S Sharmin

Shrimp is an important fisheries resource in the national economy of Bangladesh. It is considered as an exportable item and in each year it shared about 2.75% of the total export earning of Bangladesh. The present study was conducted to examine the marketing system and value chain, and marketing efficiency of shrimp marketed both in domestic and export market. For this study a total of 182 stakeholders (market intermediaries) were selected where shrimp farmers, export oriented farms, depot owners and other market participants and selling agents were included. Data were collected for the period of 2012-13. The study revealed that 80% shrimp is exported and rest 20% is consumed in the local market. Usually shrimp is exported through exporting agencies and firms. Considering all kinds of market, the average gross marketing margin and profit of shrimp in the local market were Tk 171.00/kg and Tk 134.04/kg respectively but for export market, the corresponding amounts were Tk 142.76/kg and Tk 89.51/kg respectively. Shrimp is sold both in domestic and overseas market and accordingly major supply chain and value chain were identified. Shrimp farmers and exporting agencies supply shrimp to ultimate consumers through supply chain. Actually value chain actors added value at each level of market. After processing and adding value, domestic and overseas consumers purchase 1 kg of shrimp at Tk 55.00 and Tk 142.76 respectively. Marketing efficiency was studied only for domestic market. It revealed that shorter supply channel resulted efficient marketing of shrimp where the shrimp producer received the higher percentages of sales price provided by the retailer in consumer market.J. Bangladesh Agril. Univ. 12(2): 359-368, December 2014


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