<FONT face="Verdana">Difenoconazole Residues in Rice and Paddy System</FONT>

ZHANG Zhi-yong,WANG Dong-lan,ZHANG Cun-zheng,WU Chang-fu,LIU Xian-jin*

doi:10.3969/j.issn.1001-7216.2011.03.018

Chinese Journal OF Rice Science >

2011 , Vol. 25 >Issue 3: 339 - 342

DOI: https://doi.org/10.3969/j.issn.1001-7216.2011.03.018

研究简报

Difenoconazole Residues in Rice and Paddy System

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Key Laboratory of Food Safety and Quality of Jiangsu Province/Key Laboratory of Food Safety Monitoring and Management, Ministry of Agriculture, Nanjing 210014, China; *Corresponding author, E-mail: jaasliu@jaas.ac.cn

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2011-05-10

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Abstract

To determine the safety of difenoconazole in rice and paddy system, residual dynamics in rice plant, paddy water and soil, final residual levels in brown rice, rice husk, rice stem, and paddy soil were investigated in three typical rice planting areas Changsha, Changchun and Hangzhou in China. The halflives of difenoconazole at higher dosage (1125 g/hm2, spraying for one time) in rice plant, paddy water, and paddy soil were 6.1-8.9 d, 5.3-6.2 d and 3.8-4.1 d, respectively in different rice planting area. Residual levels of difenoconazole in brown rice were below the limit of detection 28 d after treatment (<0.01 mg/kg) in all treatments. However, the residual levels of difenoconazole in rice culm were higher than those in brown rice and rice husk, and the final residual levels of difenoconazole in paddy soil were below the limit of detection (<0.01 mg/kg) in all treatments. Based on the actual production, difenoconazole residues in brown rice, rice culm and rice husk were safe according to the recommended dosage, times and interval. In spite of that, the use of difenoconazole should be avoided in ricefish culture model, so as to prevent side effects on aquatic organisms such as fish.

Key words： difenoconazole; residues; rice; paddy system

Cite this article

ZHANG Zhi-yong,WANG Dong-lan,ZHANG Cun-zheng,WU Chang-fu,LIU Xian-jin* . Difenoconazole Residues in Rice and Paddy System[J]. Chinese Journal OF Rice Science, 2011 , 25(3) : 339 -342 . DOI: 10.3969/j.issn.1001-7216.2011.03.018

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