Distribution and degradation of chlorantraniliprole and chlorpyrifos in rice

• Main Authors: YANG Huan, MA You-ning, QIN Mei-ling, CHAI Shuang-shuang, HE Qiao, ZHANG Han-tong, CHEN Ming-xue
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2018-06-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: rice, pesticide, residue, distribution, LC-MS
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2018/4/20180408.htm

In order to provide scientific basis for scientific and rational use of the two pesticides and the rice risk assessment in the later period, the dynamic digestion and distribution of chlorantraniliprole and chlorpyrifos and metabolite(3,5,6-TCP) in different organs of the rice by LC-MS were systematically studied. The residues of pesticides and metabolite in rice organs were determined periodically after application treatments at heading date. The results showed that the residues of two pesticides and metabolite in Yongyou were higher than that of Zhongzheyou, the distribution of two pesticides and metabolite in rice organs were leaf > grain > stem > root, and the residual amount in roots increased firstly and then decreased, while gradually reduced in the stem, leaf and grain prolonged with the time. The degradation rate of chlorpyrifos in rice organs was faster than that of chlorantraniliprole, with the rate more than 99% after 14 d application. The rice hull and bran were carrying about 90% two pesticides and metabolite residues, high doses of pesticides made the two pesticides and metabolite significantly increased in parts of the grain, but had no effect on the distribution characteristics of the two pesticides in the grain. Therefore, planting Zhongzheyou rice varieties with reducing application dose could achieve control effect and reduce rice consumption risk as well.