It is important to understand the residual patterns of pesticides for ensuring the safety of agriculture products. In this study, residual characteristics of fungicide trifloxystrobin were investigated in leafy vegetables such as Korean cabbage and shallot which have different surface area and growth characteristics. Trifloxystrobin (50% WG) was diluted 4,000 times with water and sprayed 3 times at an interval of 7 days before harvesting. The pressure of spray was 18 psi, the quantity of spray was 1,300 ml/min and foliar spraying. Trifloxystrobin in Korean cabbage and shallot was analyzed using analytical method established by Ministry of Food and Drug Safety in Korea. The residual amounts of trifloxystrobin and its metabolites were analyzed by LC-MS/MS. The recovery rates for residual analysis of trifloxystrobin spiked with 0.02 and 0.1 mg/kg in Korean cabbage and shallot were ranged from 82.2-101.3% and 90.4-101.9%, respectively, and less than 20% of the coefficient variation. The residual amounts of trifloxystrobin in Korean cabbage and shallot ranged from 3.347 to 19.306 mg/kg and 1.547 to 7.901 mg/kg respectively. Shallot grew up vertically and had a smooth surface, while Korean cabbage grew up with making a head and had a rough surface. Furthermore, for measuring the surface area, the harvested leaf of Korean cabbage and shallot was drawn in section paper and then calculated by the computer. The leaf area of Korean cabbage was 4 times higher than that of shallot with 95.665 pixels. Therefore, the morphological characteristics such as surface area seemed to play a key role in determining the trifloxystrobin residual characteristics in crops.

Comparison of pesticide residues in Korea cabbage and shallot by morphological characteristics of plant

256th National Meeting (2018)

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