PESTICIDE RESIDUES IN FOOD - 1982
Sponsored jointly by FAO and WHO
EVALUATIONS 1982
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
Rome, 23 November - 2 December 1982
Food and Agriculture Organization of the United Nations
Rome 1983
CYANOFENPHOS
Explanation
Cyanofenphos was evaluated by the 1975 Joint Meeting (FAO/WHO
1976) and by the 1980 Joint Meeting (FAO 1981).1/ Further information
was requested on residues in various food commodities. In addition the
Codex Committee on Pesticide Residues considered the residue data
in/on cabbage insufficient for establishing a Codex MRL. To meet the
latter requirement the 1982 Meeting was provided with the results of
supervised trials on cabbage.
RESIDUES IN FOOD AND THEIR EVALUATION
RESIDUES RESULTING FROM SUPERVISED TRIALS
The trials were carried out in Japan and in Taiwan. Province of
China by applying cyanofenphos at the recommended or slightly higher
rates. The residues in cabbage and Chinese cabbage were in the range
of those published in the 1975 Evaluation. The details of experiments
are summarized in Table 1 (Sumitomo 1982a, b).
APPRAISAL
Cyanofenphos was evaluated in 1975 and 1980. Further information
was requested on residues in various food commodities. In addition,
the CCPR requested further residue data in/on cabbage.
In supervised trials, the residue levels detected in cabbage and
Chinese cabbage treated with cyanofenphos at the recommended rates
were in the range of 0.6-1 mg/kg 21 days after treatment, which is the
proposed preharvest interval. These results are in agreement with the
earlier ones considered by the 1975 JMPR.
1/ See Annex 2 for FAO and WHO documentation.
Table 1. Residues resulting from supervised trials on cabbage
Application Residues (mg/kg) at intervals (days) after application
Rate
Crop Country Year No. (kg a.i./ha) Formulation 0 1 3 7 14 21 28-30 35-37
Cabbage1/ Japan 1981-82 2 1 25 EC 0.6 0.17 0.16
Japan 1981-82 2 0.75 25 EC 0.48 0.21
Chinese2/ Taiwan 1982 1 0.5 25 EC 14 11 9.1 4.6 1.7 0.9 0.7 0.27
cabbage (Prov. of 1 0.75 25 EC 17 13 10 6.2 2.4 1 1.2 0.48
China)
1/ Mean value of two replicates.
2/ Mean value of four replicates.
RECOMMENDATIONS
The Meeting concluded that the 2 mg/kg limit is still suitable to
cover the wide residue distribution measured in samples taken after
the recommended preharvest interval.
REFERENCES
Sumitomo Chem. Co. Residue Study with Surecide (cyanofenphos) in
cabbage. Doc. Code GR-11. (Unpublished)
Sumitomo Chem. Co. Surecide residue monitoring studies on Chinese
cabbage. Doc. Code GR 21. (Unpublished)