This study investigated the potential contamination of
28 pesticides in two tropical fruits, watermelons and
durians. Five pesticides were detected in watermelons,
namely carbofuran, chlorpyrifos, diazinon, dimethoate, and
metalaxyl, while only three were found in durian samples,
namely dichlorvos, dimethoate, and metalaxyl. Pesticide
residues were detected in approximately 90 % of both the
watermelon and durian samples tested. The results found in
the present study indicate that pesticides are commonly
used in the cultivation of watermelons and durians in
Thailand. Dimethoate and metalaxyl appeared to be the
most often used pesticides for these fruits’ cultivation.
Although five pesticides were detected in watermelons, the
pesticide residue concentrations found were much less than
their corresponding MRL values. For example, the mean
level of dimethoate found in watermelons was 0.7 ppb,
which was only 3.5 % of its recommended MRL (20 ppb).
The mean level of metalaxyl detected in watermelon
samples was 7.1 ppb, which was approximately only 3.5 %
of the recommended MRL of metalaxyl (200 ppb). This
finding implies extremely low levels of pesticide contamination
in the watermelons sold in Thailand.
This study investigated the potential contamination of28 pesticides in two tropical fruits, watermelons anddurians. Five pesticides were detected in watermelons,namely carbofuran, chlorpyrifos, diazinon, dimethoate, andmetalaxyl, while only three were found in durian samples,namely dichlorvos, dimethoate, and metalaxyl. Pesticideresidues were detected in approximately 90 % of both thewatermelon and durian samples tested. The results found inthe present study indicate that pesticides are commonlyused in the cultivation of watermelons and durians inThailand. Dimethoate and metalaxyl appeared to be themost often used pesticides for these fruits’ cultivation.Although five pesticides were detected in watermelons, thepesticide residue concentrations found were much less thantheir corresponding MRL values. For example, the meanlevel of dimethoate found in watermelons was 0.7 ppb,which was only 3.5 % of its recommended MRL (20 ppb).The mean level of metalaxyl detected in watermelonsamples was 7.1 ppb, which was approximately only 3.5 %of the recommended MRL of metalaxyl (200 ppb). Thisfinding implies extremely low levels of pesticide contaminationin the watermelons sold in Thailand.
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