Effects of Planting and Processing Modes on the Degradation of Dithianon and Pyraclostrobin in Chinese Yam (Dioscorea spp.)

Effects of Planting and Processing Modes on the Degradation of Dithianon and Pyraclostrobin in Chinese Yam (Dioscorea spp.)

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...

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Veröffentlicht in:Journal of agricultural and food chemistry 2017-12, Vol.65 (48), p.10439-10444
Hauptverfasser: Shi, Kaiwei, Wu, Xujin, Ma, Jingwei, Zhang, Junfeng, Zhou, Ling, Wang, Hong, Li, Li
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container_end_page 10444
container_issue 48
container_start_page 10439
container_title Journal of agricultural and food chemistry
container_volume 65
creator Shi, Kaiwei
Wu, Xujin
Ma, Jingwei
Zhang, Junfeng
Zhou, Ling
Wang, Hong
Li, Li
description 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
doi_str_mv 10.1021/acs.jafc.7b03916
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The processing factors of various processing treatments (hot air-drying, vacuum freeze-drying, microwave vacuum-drying, infrared-drying, steaming, and boiling) were all &lt;1, indicating that those processes can reduce residues of two pesticides at different levels. 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title Effects of Planting and Processing Modes on the Degradation of Dithianon and Pyraclostrobin in Chinese Yam (Dioscorea spp.)
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