刘艳萍, 王思威, 孙海滨. 田间条件下氟唑菌酰胺和吡唑醚菌酯在芒果上的残留及消解动态[J]. 农药学学报, 2016, 18(4): 509-515. DOI: 10.16801/j.issn.1008-7303.2016.0071
    引用本文: 刘艳萍, 王思威, 孙海滨. 田间条件下氟唑菌酰胺和吡唑醚菌酯在芒果上的残留及消解动态[J]. 农药学学报, 2016, 18(4): 509-515. DOI: 10.16801/j.issn.1008-7303.2016.0071
    LIU Yanping, WANG Siwei, SUN Haibin. Residue and decline dynamics of fluxaproxad and pyraclostrobin in mango under supervised field conditions[J]. Chinese Journal of Pesticide Science, 2016, 18(4): 509-515. DOI: 10.16801/j.issn.1008-7303.2016.0071
    Citation: LIU Yanping, WANG Siwei, SUN Haibin. Residue and decline dynamics of fluxaproxad and pyraclostrobin in mango under supervised field conditions[J]. Chinese Journal of Pesticide Science, 2016, 18(4): 509-515. DOI: 10.16801/j.issn.1008-7303.2016.0071

    田间条件下氟唑菌酰胺和吡唑醚菌酯在芒果上的残留及消解动态

    Residue and decline dynamics of fluxaproxad and pyraclostrobin in mango under supervised field conditions

    • 摘要: 为明确氟唑菌酰胺和吡唑醚菌酯在芒果上的残留行为,于2012和2013年在中国广东省和广西自治区进行了氟唑菌酰胺和吡唑醚菌酯在芒果上的田间残留及消解动态试验,建立了芒果中氟唑菌酰胺及吡唑醚菌酯残留量的高效液相色谱检测方法。样品用丙酮提取,乙酸乙酯液-液分配萃取,弗罗里硅土柱层析净化,高效液相色谱-二级管阵列紫外检测器检测,外标法定量。结果表明:氟唑菌酰胺和吡唑醚菌酯在芒果上的消解半衰期分别为7.2~9.1和8.0~11.0 d;采用42.4%吡唑醚菌酯·氟唑菌酯胺悬浮剂(SC),分别按有效成分200和300 mg/L的剂量于幼果期开始施药,施药3~4次,施药间隔期为10~15 d,距最后一次施药后7和14 d采样测定,芒果中氟唑菌酰胺和吡唑醚菌酯的残留量分别为0.004~0.053和0.004~0.072 mg/kg。其中,吡唑醚菌酯残留量符合中国制定的最大残留限量(MRL)标准(0.05 mg/kg),根据试验结果,建议中国可将氟唑菌酰胺在芒果上的MRL值暂定为0.2 mg/kg。

       

      Abstract: The residue behaviors of fluxaproxad and pyraclostrobin in mango were investigated. The residue and decline dynamics for field trials of fluxaproxad and pyraclostrobin were designed and conducted in Guangdong and Guangxi during the years of 2012 and 2013. An effective method was developed for the determination of the above two pesticides. The mango samples were extracted by acetone, followed by liquid-liquid-extraction with ethyl acetate and detected with HPLC-PDA (high performance liquid chromatography with photo-diode array). The dissipation and terminal residues of fluxaproxad and pyraclostrobin in mango samples were studied with the above analytical method. The results indicated that the half-lives of fluxaproxad and pyraclostrobin in mango were 7.2-9.1 and 8.0 -11.0 d, respectively. The mango trees were sprayed for 3 to 4 times with 10-15 days application interval using 42.4% SC at the dosage 200 and 300 mg/L at the young fruit period. The samples were collected at 7 to 14 days after the last spray. The terminal residues of those two pesticides were 0.004-0.053 mg/kg and 0.004-0.072 mg/kg determined by the above conditions. The residue of pyraclostrobin met the maximum residue limit (MRL, 0.05 mg/kg), according to the trial results. It is suggested that the MRL of fluxaproxad in mango in China should be set as 0.2 mg/kg.

       

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