Browsing by Author "Ngabirano, Hannington"

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    Pesticide residues in vegetables produced in rural south-western uganda
    (Food Chemistry, 2021) Ngabirano, Hannington; Birungi, Grace
    This study investigated seven pesticides in vegetables produced in rural South-western Uganda to determine their suitability for human consumption. Pesticide residue concentrations (ppm) were determined using QuEChERS method, LC–MS/MS, GC-MS/MS and UV-Vis. Cypermethrin, dimethoate, metalaxyl, profenofos, malathion, dichlorvos and mancozeb concentrations detected in sprayed samples ranged between 0.00403 to 0.05350, 0.17478 to 62.60874, 0.12890 to 3.55681, 0.00107 to 0.59722, 0.03144 to 0.63328, 0.00240 to 0.34102 and 0.00001 to 0.00244, respectively. The residues exceeded MRLs in sprayed samples (59.52 %), unsprayed samples (18 %) and market samples (8 %). The quality index of the market vegetables was found to be optimal (14.29 %), good (75 %), adequate (3.57 %) and inadequate (14.29 %). Pesticide residues may lower food quality and pose risk to human health. Therefore, regulation and monitoring pesticide residues in vegetables produced in south-western Uganda in order to avoid harmful effects on human health would be paramount.
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    Pesticide Use In Vegetable Production In Rural Uganda - A Case Study of Kabale District, South Western Uganda
    (Research Square, 2020) Ngabirano, Hannington; Birungi, Grace
    A study to investigate commonly grown vegetables, commonly used pesticides, and pesticide use practices was conducted in Kabale District, in south-western Uganda. This is because indiscriminate pesticide use and poor application practices can leave pesticide residues in food rendering it unsafe for consumption. The study revealed extensive pesticide application in Brassica oleracea; var. capitata (cabbage), Brassica oleracea; var. botrytis (cauliflower), Solanum lycopersicum, (tomato) and Beta vulgaris (beet root). Information obtained using interviews revealed that 16.5% traders sell pesticides and 70% farmers spray pesticides on vegetables. Only 18% of farmers could interpret instructions correctly on a given pesticide container label. All farmers (100%) had never attended any pesticide use training. Cypermethrin, dimethoate, dichlorvos, metalaxyl, profenofos, malathion and mancozeb were common pesticides used in spraying vegetables however 42% of the farmers mixed different pesticides for use. Limited knowledge about pesticide application, inability to interpret instructions, non-observation of waiting period before harvesting, mixing pesticides and lack of training on pesticide use for farmers are potential risks to food safety. There is need to address knowledge gaps on safer pesticide application in order to attain safe agricultural productivity for sustainable food security, human health and community development in Kabale District, Uganda.
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    A Systematic Review and Meta-analysis of Climate Change and Water Resources in Sub-Sahara Africa
    (2022) Turyasingura, Benson; Chavula, Petros; Hirwa, Hubert; Mohammed, Fatima S.; Ayiga, Natal; Bojago, Elias; Benzougagh, Brahim; Ngabirano, Hannington
    Variations in precipitation that affect water resources have drawn a lot of attention to climate change-related water quality issues in recent years. Point and non-point source contaminants have an impact on water quality due to seasonal rainfall variability, and rainfall events are crucial in spreading these pollutants. Sub-Saharan Africa has the least stable access to freshwater supplies. Numerous academics have undertaken extensive research on the connection between climate change and water resources, yielding significant research findings. However, there is a dearth of quantitative analysis and thorough evaluation of research accomplishments. The purpose of the study was to undertake an organized literature review on the topic of examining the relationship between Sub-Saharan Africa's water resources and climate change. In the first segment, Vos-Viewer was used to map, study the literature, and identify any gaps in order to evaluate the impact of rainfall variability on water quality. The adaptation and mitigation strategies for water availability were described in the second section. This report utilizes the VOS-Viewer bibliometric software to create a combative network and keyword co-occurrence map based on the pertinent literature on the topics of climate change and water resources in the core collection of the Web of Science database and dimension. According to the study's findings,