Effects of Planting and Processing Modes on the Degradation of Dithianon and Pyraclostrobin in Chinese Yam (Dioscorea spp.)
文献类型： 外文期刊
作者： Shi, Kaiwei 2 ; Wu, Xujin 1 ; Ma, Jingwei 1 ; Zhang, Junfeng 1 ; Zhou, Ling 1 ; Wang, Hong 1 ; Li, Li;
作者机构： 1.Minist Agr, Inst Qual Stand & Testing Technol Agroprod, Lab Qual Safety Risk Assessment Agroprod Zhengzho, Henan Acad Agr Sci,Key Lab Grain Qual & Safety &, Zhengzhou 450002, Henan, Peoples R China
2.Chinese Acad Sci, Inst Zool,
关键词： degradation;dithianon;pyraclostrobin;planting mode;processing factor;yam
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）
ISSN： 0021-8561
年卷期： 2017 年 65 卷 48 期
页码：
收录情况： SCI
摘要： The yam (Dioscorea spp.) is widely cultivated in China. The degradation of dithianon and pyraclostrobin in yams with different planting and processing treatments was investigated in this article. An analytical method for two pesticides in yam and yam plant was developed, and recoveries were between 77% and 93%, with relative standard deviations from 0.8% to 7.4%, respectively. On the basis of this method, half-lives for plants grown on stakes versus plants grown without stakes were compared. The results indicated that the half-life for pesticide residues for plants grown on stakes versus plants grown without stakes differed as 6.7 versus 3.1 days for dithianon and 5.4 versus 5.2 days for pyraclostrobin. Dithianon was significantly influenced by planting mode because of its low stability under sunlight. The processing factors of various processing treatments (hot air-drying, vacuum freeze-drying, microwave vacuum-drying, infrared-drying, steaming, and boiling) were all <1, indicating that those processes can reduce residues of two pesticides at different levels. Significant amounts of residues were removed during the boiling treatment, whereas the others showed less effect.
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