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    The rapid degradation of Lambda-Cyhalothrin makes treated vegetables relatively safe for consumption

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    U18ArtDjouakaRapidInthomDev.pdf (5.933Mb)
    Date
    2018-07-20
    Author
    Djouaka, R.
    Soglo, M.
    Kusimo, M.O.
    Adéoti, R.
    Talom, A.
    Zeukeng, F.
    Paraïso, A.
    Afari-Sefa, Victor
    Saethre, M.G.
    Manyong, Victor M.
    Tamò, M.
    Waage, Jeff
    Lines, J.
    Mahuku, George S.
    Type
    Journal Article
    Target Audience
    Scientists
    Metadata
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    Abstract/Description
    Lambda-cyhalothrin (λ-cyhalothrin) is the most commonly used pyrethroid insecticide for vegetable farming in Benin. This insecticide is misused and overused by farmers, and hence may pose health hazards to consumers. We monitored λ-cyhalothrin residues in lettuce and cabbage from farms at the market gates in Cotonou and Parakou using high performance liquid chromatography (HPLC) analysis techniques. These residues were also monitored on samples directly from farms (on-farm sampling) for 14 days post-treatment. Potential factors such as photolysis and hydrolysis involved in λ-cyhalothrin degradation were also screened. Results revealed that the level of λ-cyhalothrin residue concentrations in lettuce from Houeyiho decreased from 4.2 mg/kg on Day 1 to about 0.2 mg/kg on Day 7. On Day 9, analyzed lettuces were all λ-cyhalothrin free. In contrast, even 14 days after treatment of cabbage from Bawera (Parakou), we still recorded the presence of λ-cyhalothrin residues in analyzed samples. For samples from market gates, λ-cyhalothrin residues were found in lettuce from two markets out of the nine surveyed in Cotonou. Interestingly, none of these contaminated samples had residues above the maximum residue limit for lettuce (MRL = 0.5 mg/kg). Similarly, in Parakou, samples from all five surveyed vegetable markets were contaminated with λ-cyhalothrin residues at concentrations below the MRL for cabbage (MRL = 0.2 mg/kg). We conclude that λ-cyhalothrin residues in lettuce and cabbage from farms and markets in Parakou and Cotonou are within the MRL, and hence are relatively safe for consumption.
    https://dx.doi.org/10.3390/ijerph15071536
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/3428
    Non-IITA Authors ORCID
    Rousseau Djouakahttps://orcid.org/0000-0003-4772-0753
    May-Guri Sæthrehttps://orcid.org/0000-0001-8819-9154
    Victor Manyonghttps://orcid.org/0000-0003-2477-7132
    Manuele Tamòhttps://orcid.org/0000-0002-5863-7421
    George Mahukuhttps://orcid.org/0000-0001-8444-8651
    Digital Object Identifier (DOI)
    https://dx.doi.org/10.3390/ijerph15071536
    Agrovoc Terms
    Hplc; Vegetables; Insecticides
    Regions
    Africa; West Africa
    Countries
    Benin
    Journals
    International Journal of Environmental Research and Public Health
    Collections
    • Journal and Journal Articles4835
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