A Comparative Study on Post-Harvest Losses Associated with Upcountry Vegetable before and During COVID -19 Pandemic Situation: A Case of The Welimada Divisional Secretariat Area

Vegetables are essential food items that provide daily nutritional requirements to maintain healthy life for human beings. Therefore, it is necessary to maintain continuous production and supply. The unexpected Covid-19 plague disrupted the production, sale and distribution of vegetables so that producers, traders as well as consumers happened to face unexpected problems. Accordingly, a study was conducted with the main objective to investigate the post harvesting losses associated with upcountry vegetable before and under COVID-19 pandemic situation comparatively. To achieve the main objectives a field survey was carried out by collecting primary data from 16 traders from the Economic Center and 50 farmers from 05 Grama Niladhari Divisions of Welimada divisional secretariat area using stratified sampling technique. Additional information was collected by using interviews with farmers and traders and secondary data. Data was analyzed using quantitative, qualitative methods and paired T tests were performed to confirm the difference between the variables associated with before and during the COVID-19 pandemic statistically. Results reviled that, there was a significant difference (p <0.05) in post-harvest losses coursed at farm, transport and wholesale lelves in marketing of vegetables before and during the COVID-19 pandemic. Several factors affected to increase post-harvest losses and there are the harvesting was delayed, number of barriers were faced during transportation, the economic center has been closed for several days, vegetable prices have fallen and wholesales have declined. It can be concluded that the post-harvest damage to upcountry vegetable has been affected by the covid-19 pandemic.

A Review on Agriculture Crop Prediction Techniques Using Machine Learning

Machine learning is a useful decision-making tool for predicting crop yields, as well as for deciding what crops to plant and what to do during the crop's growth season. To aid agricultural yield prediction studies, a number of machine learning techniques have been used. We employed a Systematic Literature Review (SLR) to extract and synthesize the algorithms and features used in crop production prediction research in this investigation This paper provides a comprehensive overview of the most recent machine learning applications in agriculture, with a focus on pre-harvesting, harvesting, and post-harvesting issues The papers have been studied in depth, analysed the methodology and features employed, and made recommendations for future study. Temperature, rainfall, and soil type are the most commonly utilised features, according to our data, while Artificial Neural Networks are the most commonly employed method in these models.

ANTIFUNGAL ACTIVITY OF CHITOSAN AGAINST Rhizopus stolonifer

These days instead of chemical pesticides, various natural alternatives have been used for the management of post-harvest diseases. This research was carried out to evaluate the antifungal potential of different chitosan concentrations viz., 5, 10, and 15 mg/µl against Rhizopus stolonifer by the agar dilution and well diffusion methods. The evaluation was carried out after seven days of incubation by measuring the inhibition of R. stolonifer mycelial growth. Results of the study revealed that the chitosan had a significant inhibitory effect on mycelial growth and maximum mycelial growth inhibition was reported at the 10 and 15 mg/µl concentrations and these two treatments are not significantly different. Based on these results, the best concentration (15 mg/µl) was further evaluated by the well diffusion technique. The average inhibition zones formed by the higher concentration was 25mm. Results of the study suggested that chitosan can be used for the management of post-harvesting diseases of tomatoes.

Temporal variation of tropospheric NO2 columns in Vietnam during 2015–2020

Nitrogen dioxide (NO2) in the atmosphere can be measured using the tropospheric NO2 columns, indicating the number of molecules of NO2 in an atmospheric column from the ground surface to the top of the atmosphere above a square centimeter of the surface. In this study, the temporal variations of tropospheric NO2 columns in Vietnam during 2015–2020 were investigated. To do this, data on the columnar NO2 obtained from the Ozone monitoring instrument (OMI) onboard the NASA’s Earth orbiting satellite Aura were used. Consequently, northeastern Vietnam showed the highest values of the tropospheric NO2 columns over the whole study period (2015–2020), suggesting that this area would be a hot spot of NO2 pollution in Vietnam. In addition, the lowest and highest mean levels of columnar NO2 were found in 2020 and 2016, respectively. However, there is no statistical significance among the columnar NO2 in 2015–2020. Regarding the monthly variation, March and April exhibited the highest levels of tropospheric NO2 columns, which would be affected by frequent combustion activities (e.g., post-harvesting combustion) and meteorological conditions, such as lower air temperature. Results of this study can contribute to an understanding of NO2 pollution in Vietnam over long period.

Profiles of Volatile and Phenolic Compounds as Markers of Ripening Stage in Candonga Strawberries

Volatile compounds, quality traits (total phenols and antioxidant capacity) and High-performance liquid chromatography (HPLC)-isolated polyphenols of strawberries, variety Sabrosa, commercially referred to as “Candonga”, harvested at three different times (H1, H2 and H3) and at two different ripening stages, namely half-red (Half-red-H1, Half-red-H2 and Half-red-H3) and red (Red-H1, Red-H2 and Red-H3) were evaluated. Dominant anthocyanins, namely cyanidin-3-O-glucoside, pelargonidin-3-O-glucoside and pelargonidin-3-O-rutinoside, as well as p-coumaryl hexoside increased during harvesting, differently from flavonoids, such as quercetin-3-O-glucoside, kaempferol-3-O-glucoronide and quercetin 3-O-glucoronide, that declined. Samples clustered in different quadrants of the principal component analysis (PCA) performed on volatiles, quality traits and phenolic compounds, highlighting that only the red samples were directly correlated to volatile components, as volatiles clearly increased both in number and amount during ripening. In particular, volatiles with a positive impact on the consumers’ acceptance, including butyl butyrate, ethyl hexanoate, hexyl acetate, nonanal, terpenes and lactones, were positively associated with the Red-H1 and Red-H2 strawberries, while volatiles with negative coefficients related to consumer liking, including isopropyl butyrate, isoamyl butyrate and mesifurane directly correlated with the Red-H3 samples. Accordingly, strawberries harvested at Red-H1 and Red-H2 ripening stages could be preferred by the consumers compared to the Red-H3 fruit. Altogether, these results could help to individuate quality traits as putative markers of the ripening stage, and optimize the process of post-harvesting ripening to preserve or improve the desirable aromatic characteristics of strawberries.

MYCOFLORA AND AFLATOXIN LEVELS IN WALNUT SAMPLES STORED IN DIFFERENT PACKAGING MATERIALS IN OGUN STATE

Aflatoxin levels in nuts and fruits pose a great threat to food storage and availability. This study aimed at determining the mycoflora and aflatoxin level in stored walnut under various conditions. Freshly harvested walnuts were stored for 90 days in three different media: jute bags, Plastic containers and sterile polythene bags under room (37ᵒC) and refrigeration (4ᵒC) temperature. After 90 days of storage, the stored walnuts were examined for fungal growth at one month interval after which colonial and morphological characterization were carried out to identify the fungi present. Proximate analysis and aflatoxin content of the walnut samples were determined by standard methods. Fungi isolated from the walnuts include; Aspergillus niger, Saccharomyces cerevisae, Penicillum notatum, Aspergillus sydowi, Fusarium oxysporium, and Rhizopus stolonifer. Walnuts stored in plastic container at room temperature had the lowest aflatoxin level of 0.002 ng/kg while that stored in polythene bags had the highest (0.054 ng/kg). Proximate analysis also revealed that walnuts stored in polythene bag reduced significantly (p<0.05) in protein, ash content, fat, fibre, moisture and carbohydrates while samples stored in jute bag and plastic container remained unchanged. This study shows that storage methods contributed to the overall quality, shelf life and aflatoxin content of walnut and hence care should be taken during post harvesting process.

Globalization of Agriculture and Atomization of Farming: Small Farms Crisis in Asia

Agriculture in Asia is being pushed into a new policy regime that uncritically promotes free trade and laissez faire policies. The World Trade Organization agreement on agriculture, regional preferential trading arrangements (PTAs) and neoliberal policies pursued by the individual nations are the central features of the new regime. The new regime is built disregarding the existing knowledge on agricultural commodities that they are prone to market failures, which are unlikely to be corrected if left unregulated. In this article, we portray the new regime in terms of two defining processes that are at work, viz. globalization of agriculture and atomization of farming. Globalization happens on account of integration of the agricultural markets at provincial, national and global levels. Atomization of farming occurs due to fragmentation of holdings on the one hand and weakening of ‘collective action’ on the other. In the farming end of the value chains, millions of small farms, who lack any market power whatsoever, compete among themselves. The post-harvesting nodes have fewer and larger firms. As we have argued at length, the large firms inhabiting the postharvest nodes of the commodity chains are capable of extracting profit out of volatilities in the market. The non-farm nodes are characterized by economies of scale and possible accumulation of market power. Such profiteering will be at the expense of the atomized farms as well as the final consumers of the commodities. The policy has become suddenly very active in abetting competition upstream and limiting it downstream. The regime legitimizes entry barriers downstream and intervenes directly to promote entry, augment supply/competition upstream. The policymakers do not want to intervene in the market to save producers from commodity problems; instead favour players profiteering out of such possible instances of market failure.

2-Dimensional inline system for peppermint oil extraction

Peppermint leaves have wide range of applications in medicines, toothpastes, soaps, mouth fresheners, chewing gums etc. However, in India, the traditional way of processing peppermint leaves for extraction of peppermint oil is slow, tedious, labour intensive, hazardous, and causes skin problem as well. This paper proposes a method of mechanizing the post harvesting process, with least modification in the current apparatus being used by the farmers in the Indian villages. It proposes a non-electric 2-dimensional Mechanized system for movement and compaction of the compact/hay. The mechanism will help to reduce the number of labourers per unit hay volume and the risk associated with the contact of in-process hay with their skin. Also, a lot of time is wasted in putting the leaves/hay in the boiler vessel, preparing the hay in a compact form and in removing the processed leaves. This paper is an attempt to get rid of most of the problems aforementioned and make the process safe, efficient, less labour intensive and more economical for farmers and workers. The mechanism proposed is sustainable and farmer friendly as it does not require any special training for its operation. It will increase the profit of small scale industries with small capital investment for the setup.

A Review on Post-Harvesting Losses and Opportunities in Cold Chain

The food supply chain is one of the most complex systems. The system begins with production and then continues with food handling techniques for preservation. In practice, the surplus food distributed seems to have been passing through various stages before it actually reaches out to consumers. However, the question arises if all the food produced is totally consumed. In this paper, we shall be studying the distinct stages involved in the food supply chain; how and where the food loss takes place; and the tremendous impacts it caused socially and economically. This paper will further help in quantifying the food waste and shall be obliged in identifying the required actions to overcome food loss and waste globally. This paper outlines different strategies and approaches adopted for post-harvest food loss assessments in order to achieve sustainable food services; move towards zero waste economy to implement poverty extermination and food security around the world.