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.