Pesticide residues in vegetables produced in rural south-western Uganda

Ngabirano, Hannington; Birungi, Grace

doi:10.1016/j.foodchem.2021.130972

Cited by 33 publications

(25 citation statements)

References 63 publications

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“…The contamination of these plants is likely to be as a result of root uptake of DDT residues and its metabolites present in the soil, as opposed to aerial precipitation of DDT during IRS (Van Dyk et al, 2010). The high mean levels of DDE and DDD detected in vegetable samples from the study areas were not significantly different (p > 0.05) from the mean levels of DDE and DDD in vegetable samples from the control site, probably because similar plant tissues are capable of absorbing insecticides (Gitari et al, 2018;Ngabirano and Birungi, 2021) at the same rate. ∑DDT levels from the current study were however lower than those reported by Van Dyk et al (2010) of 43 μgkg -1 in vegetables from Vembe district S. Africa, two months after IRS of DDT.…”

Section: Levels Of Ddt Residues In Leafy Vegetablesmentioning

confidence: 83%

Dichlorodiphenyltrichloroethane (DDT) and its metabolites in house dust, soil and selected food crops from indoor residual sprayed areas of Apac and Oyam Districts, Uganda

Paul¹,

Wasswa²,

Proscovia³

et al. 2022

Afr. J. Pure Appl. Chem.

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Dichlorodiphenyltrichloroethane (DDT) levels and its metabolites are reported in 75 soil and 75 vegetable samples from the vicinity of homesteads sprayed with DDT during indoor residual spraying (IRS) pilot exercise, carried out in 2008 in Apac and Oyam districts, Uganda as a measure to control malaria. The samples were randomly and conveniently collected in 2020 from selected villages of the districts, extracted using solid dispersion and multi-residue methods for soil and vegetable samples, respectively and analyzed using GC-ECD and GC-MS. DDT residues were detected in all samples collected. The ΣDDT (µg kg-1) in all indoor house dust, outdoor soil samples from villages of Apac and Oyam districts and control areas were 69.9±20.9 and 8.9±4.7, 113.4±22.6 and 15.4±4.3, and 1.13±0.27 and 1.8±0.9, respectively. ΣDDT were significantly higher (p < 0.05) in the study areas than the control areas. In vegetables, ∑DDT (µg kg -1 ) ranged between 1.7±0.3 and 8.3±4.0 and 2.3±0.4 and 11.4±7.5 in the study and control areas, respectively. Abelmoschus esculentus and Gynandropsis gynandra had the highest levels. The results suggest that IRS had an effect on DDT levels in the environment. However, ∑DDT in vegetables were significantly below (P < 0.05) the EU EMRL, thus, the results raise no concern regarding the potential health effects of DDT to the residents. Nevertheless, due to bioaccumulation effects of DDT, to control malaria, measures like Ecohealth rather than IRS of DDT should be embraced.

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Section: Levels Of Ddt Residues In Leafy Vegetablesmentioning

confidence: 83%

Dichlorodiphenyltrichloroethane (DDT) and its metabolites in house dust, soil and selected food crops from indoor residual sprayed areas of Apac and Oyam Districts, Uganda

Paul¹,

Wasswa²,

Proscovia³

et al. 2022

Afr. J. Pure Appl. Chem.

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“…This conclusion is supported by some recent studies that point toward the relevance of pathways that have been partially overlooked in the past. Ngabirano and Birungi ( 2022 ), for example, reported in a recent study on vegetables produced in Uganda that even unsprayed products contain residues. Their main hypothesis was that environmental conditions (high temperature, relative humidity) could cause pesticide volatilization and drift on unsprayed vegetable gardens depending on the pesticide properties.…”

Section: Resultsmentioning

confidence: 99%

Pesticides monitoring in surface water of a subsistence agricultural catchment in Uganda using passive samplers

Oltramare

Weiss

Staudacher

et al. 2022

Environ Sci Pollut Res

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Pesticides are intensely used in the agricultural sector worldwide including smallholder farming. Poor pesticide use practices in this agronomic setting are well documented and may impair the quality of water resources. However, empirical data on pesticide occurrence in water bodies of tropical smallholder agriculture is scarce. Many available data are focusing on apolar organochlorine compounds which are globally banned. We address this gap by studying the occurrence of a broad range of more modern pesticides in an agricultural watershed in Uganda. During 2.5 months of the rainy season in 2017, three passive sampler systems were deployed at five locations in River Mayanja to collect 14 days of composite samples. Grab samples were taken from drinking water resources. In these samples, 27 compounds out of 265 organic pesticides including 60 transformation products were detected. In the drinking water resources, we detected eight pesticides and two insecticide transformation products in low concentrations between 1 and 50 ng/L. Also, in the small streams and open fetch ponds, detected concentrations were generally low with a few exceptions for the herbicide 2,4-D and the fungicide carbendazim exceeding 1 ug/L. The widespread occurrence of chlorpyrifos posed the largest risk for macroinvertebrates. The extensive detection of this compound and its transformation product 3,4,5-trichloro-2-pyridinol was unexpected and called for a better understanding of the use and fate of this pesticide. Graphical abstract

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“…The pretreatment of fresh fruit samples (apple, orange, and grape) was performed as reported previously (Ngabirano & Birungi, 2022), with some modifications. In brief, 10 g of fresh samples was homogenized and mixed with 10 ml acetonitrile.…”

Section: Methodsmentioning

confidence: 99%

A colloidal gold immunochromatography for the detection of flumioxazin residues in fruits

Wang

Liu

et al. 2022

Journal of Food Science

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In this study, an excellent monoclonal antibody (mAb) was produced that could sensitively and specifically recognize Flu in fruit samples. The mAb belonged to the IgG2 subclass and had a half-inhibitory concentration (IC 50 ) of 0.59 ng/ml and a limit of detection (LOD) of 0.13 ng/ml. A cross-reactivity test revealed that the mAb had good specificity for Flu. A gold nanoparticle-based lateralflow immunochromatographic (ICA) strip was used for the rapid screening of Flu in fruit samples. The method had a visual cut-off value of 10 µg/kg for Flu in three different fruit samples when evaluated with the naked eye. The LODs were 5.25, 3.13, and 4.64 µg/kg for Flu in apples, grapes, and oranges, respectively, as obtained with the aid of a strip scan reader. Therefore, this ICA strip assay represented a potential tool for the detection of Flu in fruit samples.

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Pesticide residues in vegetables produced in rural south-western Uganda

Cited by 33 publications

References 63 publications

Dichlorodiphenyltrichloroethane (DDT) and its metabolites in house dust, soil and selected food crops from indoor residual sprayed areas of Apac and Oyam Districts, Uganda

Dichlorodiphenyltrichloroethane (DDT) and its metabolites in house dust, soil and selected food crops from indoor residual sprayed areas of Apac and Oyam Districts, Uganda

Pesticides monitoring in surface water of a subsistence agricultural catchment in Uganda using passive samplers

A colloidal gold immunochromatography for the detection of flumioxazin residues in fruits

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