Geun-Hwan Gil

Residue Patterns of Procymidone, Chlorpyrifos and Cypermethrin in Peaches During Cultivation and Storage Period

The residue patterns of procymidone, chlorpyrifos and cypermethrin in peaches were examined. The pesticides were sprayed at 15 days before harvest and then were determined the residue at 0, 1, 2, 3, 5, 7, 10 and 15 days after pesticide application and calculated their . Also, the degradation patterns at and during storage period were compared. Biological half-lives of procymidone, chlorpyrifos and cypermethrin in peaches during the cultivation period were 3.1, 7.2 and 10.4 days, respectively. The biological half -life of procymidone was shorter than the others. During the storage period, half-lives of procymidone, chlorpyrifos and cypermethrin were 16.0, 14.3 and 13.1 days at and 4.6, 10.2 and 12.9 days at , respectively. The degradation rates of these three pesticides in storage period were slower than them in cultivation period. Removal rates were by tap water, and by detergent solution.