PESTICIDE RESIDUES IN FOOD - 1983


    Sponsored jointly by FAO and WHO






    EVALUATIONS 1983





    Data and recommendations of the joint meeting
    of the FAO Panel of Experts on Pesticide Residues
    in Food and the Environment and the
    WHO Expert Group on Pesticide Residues
    Geneva, 5 - 14 December 1983

    Food and Agriculture Organization of the United Nations
    Rome 1985


    CHINOMETHIONAT

    RESIDUES

    RESIDUES RESULTING FROM SUPERVISED TRIALS

         In Japan, tomatoes grown in a greenhouse were treated 1 to 3
    times at 5-day intervals with chinomethionat at a rate of 0.5 kg/ha
    (Nikon Tokushu Noyaku Seizo KK, 1978). Samples taken at 1, 3, and 7
    days after the last application were analysed. The residues detected
    are summarized in Table 1.

                                                                        

                             Residue (mg/kg) after application (days)
    No. of treatments                                                   

                             1                3               7
                                                                        

    1                       0.05
                            0.24
    2                       0.07
                            0.26
    3                       0.12              0.1             0.12
                            0.38              0.26            0.18
                                                                        

    1971      Guernsey. 4 sites, including 3 varieties
              20% smoke generator
              14 grams quinomethionate (1 smoke canister) per 100 m3.
              Applications ranging from 1-3 with 14 days between
              applications.
              Residues at day 0 were below the limit of determination
              of 0.05 mg/kg.

    1970      Guernsey
              25% w/w wettable powder
              2 oz a.i. per 100 gallons high volume to run-off
              Application to fruit almost ready to harvest

              1 day               2 days         3 days

              0.1                 0.02           0.02

    APPRAISAL

         Chinomethionat was last evaluated by the 1981 JMPR when
    information on use patterns on tomatoes and additional residues data
    from supervised trials were considered desirable. Limited new data
    together with those available to the 1981 meeting were reviewed, but
    the meeting was again unable to estimate a maximum residue level for
    tomatoes owing to deficiencies in the data. The meeting reaffirmed
    that further data were desirable.

    See Also:
       Toxicological Abbreviations
       Chinomethionat (WHO Pesticide Residues Series 4)
       Chinomethionat (Pesticide residues in food: 1977 evaluations)
       Chinomethionat (Pesticide residues in food: 1981 evaluations)
       Chinomethionat (Pesticide residues in food: 1984 evaluations)
       Chinomethionat (Pesticide residues in food: 1987 evaluations Part II Toxicology)