Pesticide residues in fruits and vegetables from the southern part of Botswana

Gondo, Thamani T.; Kamakama, Malaki; Oatametse, Boingotlo; Samu, Tawangwa; Bogopa, Juda; Keikotlhaile, Boitshepo Miriam

doi:10.1080/19393210.2021.1950845

Cited by 24 publications

(6 citation statements)

References 43 publications

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“…Our findings present higher number of pesticide residues detected than reports from other studies in Africa. 45 - 49 For example, studies in Tanzania, Kenya and Algeria found 7 or less active ingredients in produce samples. 45 , 46 , 48 Occurrence of multiple pesticides residues could be as a result of plant uptake of persistent pesticides 50 and spray drift.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Similar studies carried out in Ghana, Malawi, Tanzania, Botswana, Algeria and Uganda indicate that organophosphates, carbamates, dithiocarbamates, pyrethroids and neonicotinoids, all insecticides, are the most common pesticide residues detected in fruits and vegetables in Africa. 30,[45][46][47][48][49]55,56 Two or more -up to 19 pesticide active ingredients were detected in 95.6% of the fruit and vegetable samples, indicating their mixed use on the farm. Although in relatively lower percentages, studies from Botswana, Algeria and Kuwait revealed 33.4%, 47% and 40% fruit and vegetable samples with multiple pesticides residues, 48,57,58 findings that collaborate with those from our study.…”

Section: Discussionmentioning

confidence: 99%

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Pesticide Residues in Fresh Fruit and Vegetables from Farm to Fork in the Kampala Metropolitan Area, Uganda

Ssemugabo

Bradman

Ssempebwa

et al. 2022

Environ�Health�Insights

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This study assessed concentrations of pesticide residues in fruits and vegetables from farm-to-fork in Kampala Metropolitan Area, Uganda. A total of 160 samples of fruit and vegetables collected from farms, markets, streets, restaurants and homes were analysed using liquid chromatography–tandem mass spectrometry; and Gas Chromatograph–Mass Spectrometer for dithiocarbamates. Multiple pesticide residues were detected in majority of the samples (95.6%). The proportions of the most frequently detected pesticides residue classes were organophosphates (91.3%), carbamates (67.5%), pyrethroids (60.0%) dithiocarbamates (48.1%) and neonicotinoids (42.5%). Among organophosphates, propotamophos, acephate, fonofos, monocrotophos and dichlorvos were the most detected active ingredients; aminocarb, methomyl and pirimicarb were the commonly detected carbamates; while imidacloprid, a neonicotinoid and lambda-cyhalothrin, pyrethroid were also highly detected. Twenty-seven pesticide were tested at all stages, of which the concentrations either decreased or increased along the chain. Multiple pesticide residues occurred in commonly consumed fruit and vegetables with decreasing or increasing concentrations from farm-to-fork.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Pesticide Residues in Fresh Fruit and Vegetables from Farm to Fork in the Kampala Metropolitan Area, Uganda

Ssemugabo

Bradman

Ssempebwa

et al. 2022

Environ�Health�Insights

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“…Weed infestation during the rapeseed seedling stage is a major factor reducing yield ( Krato and Petersen, 2012 ). Although chemical herbicides can effectively and easily control weeds, pesticide residues are extremely harmful to the growth of crops, particularly rapeseed ( Gondo et al., 2021 ). Sclerotiorum is one of the main pathogens that causes serious stem rot disease in Brassica napus L. ( Bolton et al., 2006 ).…”

Section: Introductionmentioning

confidence: 99%

Functional study of CYP90A1 and ALDH3F1 gene obtained by transcriptome sequencing analysis of Brassica napus seedlings treated with brassinolide

Gan

Luan

et al. 2022

Front. Plant Sci.

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Sclerotinia disease and weeds of Brassica napus greatly reduce crop yields. However, brassinolides can improve the resistance of plants to sclerotinia diseases and herbicides. In this study, we investigated the effects of brassinolide on the occurrence, physiological indices, yield, and gene expression of Fanming No. 1 seeds under sclerotinia and glufosinate stress. The results showed that soaking of the seeds in 0.015% brassinolide for 6 h reduced the incidence of sclerotinia by 10%. Additionally, in response to glufosinate stress at the seedling stage, the enzyme activities of catalase and superoxide dismutase increased by 9.6 and 19.0 U/gFW/min, respectively, and the soluble sugar content increased by 9.4 mg/g, increasing the stress resistance of plants and yield by 2.4%. LHCB1, fabF, psbW, CYP90A1, ALDH3F1, ACOX1, petF, and ACSL were screened by transcriptome analysis. ALDH3F1 and CYP90A1 were identified as key genes. Following glufosinate treatment, transgenic plants overexpressing ALDH3F1 and CYP90A1 were found to be resistant to glufosinate, and the expression levels of the ALDH3F1 and CYP90A1 were 1.03–2.37-fold as high as those in the control. The expression level of ATG3, which is an antibacterial gene related to sclerotinia disease, in transgenic plants was 2.40–2.37-fold as high as that in the control. Our results indicate that these two key genes promote plant resistance to sclerotinia and glufosinate. Our study provides a foundation for further studies on the molecular mechanisms of rapeseed resistance breeding and selection of new resistant varieties.

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“…In a surveillance of multi-pesticide residues of fruits and vegetables in markets of Botswana a total of 83 fruit and vegetable samples were examined and the levels of pesticides ranged between 0.0032 ± 0.0009 mg/kg and 70.4 ± 19.4 mg/kg. Only 13% of the samples violated the EU/Codex MRLs (Gondo et al, 2021). A total of six vegetable samples, 3 fruit samples, 7 soil samples and 6 water samples was examined for pesticides residue in Pakistan and the pesticides having the highest health risk in vegetables were determined to be Bifenthrin and Difenoconazole and in fruits it was Amamectin, bifenthrin and difenoconazole and the same pesticides were detected in soil and water too (Khan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Investigation on the residue levels of nine frequently used pesticides in greenhouse grown tomato samples by QuEChERS extraction using GC-MS and HPLC analysis in Hamedan province, I. R. Iran

Morowati

Nikan

2022

Preprint

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Suitable conditions bring about high population of pests or diseases in green-houses and therefore, frequent applications of pesticides occur in this production system which causes public anxiety about pesticide residue in green-house grown crops such as tomato. The present report is the result of an investigation performed on pesticide residue level measurements in green-house grown tomato in Hamadan province. In this study, 43 tomato samples were taken from the green-houses across the province and the residue levels of nine pesticides in each sample were measured. The results indicated that 95.4% of the samples were completely free of all measured insecticides. In 4.6% of the samples the residue of Chlorpyrifos was detected of which the residue level of only one sample (2.3%) was higher than the Maximum residue limit (MRL) for this pesticide in tomato (MRL = 0.1 ppm).

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Pesticide residues in fruits and vegetables from the southern part of Botswana

Cited by 24 publications

References 43 publications

Pesticide Residues in Fresh Fruit and Vegetables from Farm to Fork in the Kampala Metropolitan Area, Uganda

Pesticide Residues in Fresh Fruit and Vegetables from Farm to Fork in the Kampala Metropolitan Area, Uganda

Functional study of CYP90A1 and ALDH3F1 gene obtained by transcriptome sequencing analysis of Brassica napus seedlings treated with brassinolide

Investigation on the residue levels of nine frequently used pesticides in greenhouse grown tomato samples by QuEChERS extraction using GC-MS and HPLC analysis in Hamedan province, I. R. Iran

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