RESIDUAL BEHAVIOUR OF FLUSILAZOLE AND TRIFLUMIZOLE FUNGICIDES ON AND IN APPLE FRUITS UNDER FIELD CONDITIONS

Document Type : Original Article

Author

Central Agricultural Pesticides Laboratory, Agricultural Research Center, Dokki, Cairo, Egypt

Abstract

Flusilazole and triflumizole residues in apple fruits were chemically determined
at different periods after spraying of these fungicides under field conditions. The
obtained results indicated that, seven days after flusilazole application, unwashed
apple fruits were found contained higher residues (0.322 ppm) than the allowed
tolerance level (0.2 ppm), while washed and peeled fruits were contained lower
residues (0.149 and 0.087 ppm, respectively) after the same period from experiment.
These residues were rapidly decreased by elapse of time, so unwashed, washed and
peeled apple fruits were contained levels below the allowed MRL i.e. 0.092, 0.008
and <0 ppm, respectively after fourteen days of flusilazole application Accordingly,
unwashed apple fruits could be marketed safely 14 days after flusilazole application,
while washed and peeled fruits could be used safely after seven days. In the case of
triflumizole, unwashed apple fruits were contained 2.030 ppm after five days of
application. Such residue is higher than the tolerance value (2.0 ppm), while washed
and peeled fruits were contained residues below the tolerance permissive values i.e.
1.010 and 1.970 ppm after three and one days of application, respectively. These
values were rapidly decreased by time prolongation, so, unwashed, washed, and
peeled apple fruits were contained residues below the allowed tolerance of 1.280,
0.490 and 0.160 ppm at seven days after triflumizole application, respectively.
Accordingly, unwashed apple fruits could be marketed safely seven days after
triflumizole application, while washed and peeled fruits could used safely three and
one days after application, respectively.

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