Residue Analysis of Picoxystrobin in Cucumber under Field Condition and Individual Variations of Residue Levels
SUN Yang
QIN Xu
ZHAO Lijie
XU Yingming?
Abstract：The residue of picoxystrobin in cucumber under field condition was investigated in the main vegetable producing areas of Tianjin,and the relationship between the individual variations of cucumber and the amount of pesticide residues was analyzed and evaluated as well, to provide scientific basis for controlling the pollution and the rational use of the novel fungicide picoxystrobin on cucumber. A method for determination of the residual amount of picoxystrobin in cucumber by using QuEChERS method and liquid chromatography was established. The average recoveries at fortified levels of 0. 02 mg/kg,0. 2 mg/kg and 1 mg/kg ranged from 76. 5% to 93. 4% with RSD less than 10%,indicating that the accuracy and precision were suitable for the requirements of pesticide residues testing standards in China. Picoxystrobin in cucumber dissipated quickly in one day after application, then gradually slow, and the residue concentration of picoxystrobin in cucumber at three days after treatment was lower than the MRL of EU (0. 05 mg/kg). The median residue(0. 508 mg/kg) of picoxystrobin in cucumber was lower than their mean value(0. 639 mg/kg). No obvious correlation between the weight of individual cucumber and the residue level of picoxystrobin was observed.
Keywords：cucumberpicoxystrobinresidue concentrationweightvariation
Publication Date：2016-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 98-101 )