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    Dissipation behavior of malathion and dimethoate residues from the soil and their uptake by garden pea (Pisum sativum)

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    Date
    2000
    Author
    Getenga,ZM.
    Jondiko JIO.
    Wandiga Shem O.
    Beck E.
    Type
    Article
    Language
    en
    Metadata
    Show full item record

    Abstract
    The dissipation of malathion and dimethoate from soil and their uptake by garden peas was studied in a greenhouse at 10-26°C. Twenty-one-day-old seedlings were treated with 50% EC malathion or 40% EC dimethoate, labelled with 14-C, at a rate of 15.53 µg/g. Dimethoate was more persistent than malathion in soil, with half-life values of 72 and 17 days, respectively. Faster dissipation of malathion was accelerated by degradation of bound residues, which would normally increase persistence in the soil. Malathion was not efficiently absorbed from the soil by pea plants due to its low solubility in water and high log Ko/w. Dimethoate was readily available to the pea plant by water mass flow through the xylem.
    URI
    http://www.cabdirect.org/abstracts/20001109277.html;jsessionid=BDF78812384AB6BF29CDD7CE06242FCC;jsessionid=838E438B41236BE360C14286233878B8
    http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/33957
    http://www.ncbi.nlm.nih.gov/pubmed/10757659
    Citation
    Bulletin of Environmental Contamination and Toxicology 2000 Vol. 64 No. 3 pp. 359-367
    Publisher
    University of Nairobi
     
    College of Biological and Physical Sciences
     
    Collections
    • Faculty of Science & Technology (FST) [4284]

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