Study on the Degradation Dynamics of Spraying Imidacloprid and Buprofezin before and After Mango Bagging  

芒果套袋前后喷施吡虫啉·噻嗪酮农药的消解动态研究（英文）

作　　者：谢德芳[1] 李胤均 钱程[1,2] 

机构地区：[1]中国热带农业科学院分析测试中心,海南海口571101 [2]华中农业大学,湖北武汉430070

出　　处：《Agricultural Science & Technology》2016年第9期2106-2110,共5页农业科学与技术（英文版）

基　　金：Supported by the Special Fund for Agro-scientific Research in Public Interest(201203092-4-2)~~

摘　　要：The four treatments of spraying water the control, spraying before bagging, spraying after bagging, spraying without bagging were conducted by spraying 38% of the mixed suspension agent of imidacloprid and buprofezin, and high performance liquid chromatography （HPLC） method was used to test the imidacloprid and buprofezin residues on mango. The results showed that in 0.05-0.5 mg/kg adding level, the average recovery rate of imidacloprid and buprofezin was 82.6-93.8%, and 101.4-104.2%, respectively, and the relative deviation （RSD） was 1.9-4.5%, 9.3-15.6%, respectively. The minimum detectable amounts of both imidacloprid and buprofezin on mango were 0.01 mg/kg. The half-life periods of imidacloprid under the treatments of spraying before bagging, spraying after bagging and spraying without bagging were 16.74, 6.38, and 8.10 d, respectively, and the half-life periods of buprofezin under the treatments of spraying before bagging and spraying without bagging were 9.72 and 9.23 d, respectively. The residual of buprofezin was low in the treatment of spraying after bagging, and the amount detected in the 3rd day had already below the detectable limit. Bagging treatment reduced the digestion rate of 2 kinds of pesticides in mango, and imidacloprid had strong systemic in mango.建立喷施清水的对照、套袋前喷药、套袋后喷药、不套袋喷药4种处理方法，喷施38％吡虫啉和噻嗪酮混合悬浮剂，建立芒果中吡虫啉、噻嗪酮残留的高效液相色谱（HPLC）检测方法。结果表明，在0．05～0．5mg／kg添加水平下，吡虫啉和噻嗪酮的平均回收率分别为82．6～93．8％、101．4～104．2％．相对偏差（RSD）分别为1．9～4．5％、9．3-15．6％。芒果中吡虫啉、噻嗪酮的最小检出量均为0．01mg/kg。吡虫啉套袋前施药、套袋后施药、不套袋施药3种处理方式下的半衰期分别是16．74、6.38、8．10d。噻嗪酮在套袋前施药、不套袋施药2种处理方式下的半衰期分别是9．72、9．23d。套袋后施药的噻嗪酮的残留量低，第3天已经低于检出限。套袋处理降低了2种农药在芒果上的消解速率。吡虫啉在芒果上有较强的内吸性。

关 键 词：IMIDACLOPRID BUPROFEZIN MANGO Dynamic SYSTEMIC 

分 类 号：S481.8[农业科学—农药学]