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The Rapid Degradation of Lambda-Cyhalothrin Makes Treated Vegetables Relatively Safe for Consumption

Author

Listed:
  • Rousseau Djouaka

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin)

  • Murielle Farrelle Soglo

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin
    Department of Nutrition and Food Sciences, Faculty of Agronomic Sciences, University of Abomey-Calavi, P.O. Box 526, Cotonou 08 BP 0932, Benin)

  • Michael Olugbenga Kusimo

    (Center for Research in Infectious Diseases (CRID), Yaounde, Cameroon)

  • Razack Adéoti

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin)

  • Armand Talom

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin
    Department of Animal Biology, Faculty of Sciences, University of Dschang, P.O. Box 96, Dschang, Cameroon)

  • Francis Zeukeng

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin
    Department of Biochemistry, Faculty of Sciences, University of Yaounde I, P.O. Box 812, Yaounde, Cameroon)

  • Armand Paraïso

    (Department of Vegetal Production, Faculty of Agronomy, University of Parakou, P.O. Box 123, Parakou, Benin)

  • Victor Afari-Sefa

    (World Vegetable Center, C/O IITA-Benin Campus, Cotonou 08 BP 0932, Benin)

  • May-Guri Saethre

    (International Institute of Tropical Agriculture (IITA), PMB 5320, Ibadan 200284, Nigeria)

  • Victor Manyong

    (International Institute of Tropical Agriculture (IITA), P.O. Box 34441, Dar-es-Salaam, Tanzania)

  • Manuele Tamò

    (International Institute of Tropical Agriculture (IITA), Cotonou 08 BP 0932, Benin)

  • Jeff Waage

    (Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine (LSHTM), London WC1E 7HT, UK)

  • Jo Lines

    (Department of Disease Control, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine (LSHTM), London WC1E 7HT, UK)

  • George Mahuku

    (International Institute of Tropical Agriculture (IITA), P.O. Box 34441, Dar-es-Salaam, Tanzania)

Abstract

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.

Suggested Citation

  • Rousseau Djouaka & Murielle Farrelle Soglo & Michael Olugbenga Kusimo & Razack Adéoti & Armand Talom & Francis Zeukeng & Armand Paraïso & Victor Afari-Sefa & May-Guri Saethre & Victor Manyong & Manuel, 2018. "The Rapid Degradation of Lambda-Cyhalothrin Makes Treated Vegetables Relatively Safe for Consumption," IJERPH, MDPI, vol. 15(7), pages 1-17, July.
  • Handle: RePEc:gam:jijerp:v:15:y:2018:i:7:p:1536-:d:158971
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    References listed on IDEAS

    as
    1. Abou Togola & Silvestro Meseka & Abebe Menkir & Baffour Badu-Apraku & Ousmane Boukar & Manuele Tamò & Rousseau Djouaka, 2018. "Measurement of Pesticide Residues from Chemical Control of the Invasive Spodoptera frugiperda (Lepidoptera: Noctuidae) in a Maize Experimental Field in Mokwa, Nigeria," IJERPH, MDPI, vol. 15(5), pages 1-11, April.
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    Cited by:

    1. Barbara Nieradko-Iwanicka & Michał Konopelko, 2020. "Effect of Lambdacyhalothrin on Locomotor Activity, Memory, Selected Biochemical Parameters, Tumor Necrosis Factor α, and Interleukin 1ß in a Mouse Model," IJERPH, MDPI, vol. 17(24), pages 1-11, December.

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