联苯菊酯在甘蓝及土壤中的消解动态
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广东省科技计划项目(2012B061800091, 2013A061402006)


Degradation dynamics of bifenthrin in cabbage and soil
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    【目的】建立残留联苯菊酯的检测方法,研究质量分数1%联苯菊酯·噻虫咹颗粒剂中联苯菊酯在甘蓝Brassica oleracea和土壤中的残留及消解动态。【方法】在广东广州市、广西南宁市和湖北潜江市进行田间试验,联苯菊酯在0.01~1.00 mg·kg-1水平范围内取0.01、0.10、0.50 mg·kg-1添加,样品中的联苯菊酯经乙腈超声波辅助提取,弗罗里硅土固相萃取柱净化,气相色谱(GC-ECD)检测,外标法定量,得到联苯菊酯在甘蓝和土壤中的残留及消解动态。【结果】联苯菊酯在甘蓝中的平均回收率为83.64%~96.44%,相对标准偏差为3.26%~7.24%; 在土壤中平均回收率为86.76%~90.09%,相对标准偏差为2.17%~4.94%。联苯菊酯在土壤中的残留半衰期为6.77~13.51 d,在甘蓝中未检出。【结论】联苯菊酯属易降解农药;该施药方法安全,值得借鉴。

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    【Objective】 To establish a detection method of bifenthrin,and to study the residue and degradation dynamics of bifenthrin in the form of 1% bifenthrin·clothianidin granules in cabbage and soil. 【Method】Field experiments were conducted in Guangzhou of Guangdong,Nanning of Guangxi and Qianjiang of Hubei.Bifenthrin was added at three levels of 0.01,0.10,0.50 mg·kg-1in the range from 0.01 to 1.00 mg·kg-1. Bifenthrin was extracted from cabbage and soil using ultrasonic-assisted acetonitrile extraction,cleaned up using a florisil solid phase extraction column,then detected by GC with ECD detector, and quantified by external standard method.【Result】The average recovery rates of bifenthrin in cabbage were 83.64 %-96.44% with 3.26%-7.24%RSD,and the average recovery rates in soil were 86.76%-90.09%with 2.17%-4.94%RSD. The half-life of bifenthrin in soil was 6.77-13.51 d.No bifenthrin residue was detected in cabbage at harvest.【Conclusion】Bifenthrin is an easily degradable pesticide. Using 1% bifenthrin·clothianidin granules as pesticide is safe and recommended.

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王世英,黄日林,李梓豪,黄聪灵,毛润乾,张志祥.联苯菊酯在甘蓝及土壤中的消解动态[J].华南农业大学学报,2016,37(3):82-85

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  • 收稿日期:2015-07-30
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  • 在线发布日期: 2016-05-05