吡虫啉在茶树菇及其菌棒上的残留消解动态
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摘要
[目的]检测70%吡虫啉水分散粒剂在茶树菇及菌棒上、中、下3个部分的残留量及消解动态。[方法]采用超高效液相色谱-串联质谱法对茶树菇及其菌棒最终残留及消解动态进行研究。[结果]茶树菇和菌棒中分别添加0.005、0.05、0.5 mg/kg 3个水平的吡虫啉,其平均回收率为92.0%～110.4%,相对标准偏差为2.9%～8.2%。吡虫啉在茶树菇上的降解符合一级反应动力学模式,在茶树菇和菌棒上段,吡虫啉半衰期分别为7.9、12.1 d。[结论]在茶树菇上手动喷雾施药70%吡虫啉水分散粒剂,按0.23、0.34 g a.i./m2的剂量施药3、4次,施药间隔7 d,最后1次施药距采收间隔10 d时,吡虫啉在茶树菇上的残留量近似于欧盟规定的吡虫啉在蘑菇农药残留限量0.05 mg/kg。
[Aims] In order to measure the dissipation and residues of imidacloprid 70% WG in Agrocybe aegerita and its substrates. [Methods] The pesticide distribution in Agrocybe aegerita and the degradation dynamics in its substrates were detected by LC-MS/MS. [Results] When the spiked levels were 0.005, 0.05 and 0.5 mg/kg in the mushroom and its substrates, the average recoveries ranged from 92.0 to 110.4%, with RSD(n=5) of 2.9-8.2%, which meets the inspection requirement of pesticide residue analysis methods. The half-lives of imidacloprid in the mushroom and its upper stick were 7.9, 12.1 d, respectively. [Conclusions] As imidacrin 70% water dispersing granules were sprayed at the doses of 0.23, 0.34 g a.i./m2 for 3 and 4 times, the residues of imidacloprid in mushroom were close to the MRL in EU(0.05 mg/kg) after 10 days.
[Aims] In order to measure the dissipation and residues of imidacloprid 70% WG in Agrocybe aegerita and its substrates. [Methods] The pesticide distribution in Agrocybe aegerita and the degradation dynamics in its substrates were detected by LC-MS/MS. [Results] When the spiked levels were 0.005, 0.05 and 0.5 mg/kg in the mushroom and its substrates, the average recoveries ranged from 92.0 to 110.4%, with RSD(n=5) of 2.9-8.2%, which meets the inspection requirement of pesticide residue analysis methods. The half-lives of imidacloprid in the mushroom and its upper stick were 7.9, 12.1 d, respectively. [Conclusions] As imidacrin 70% water dispersing granules were sprayed at the doses of 0.23, 0.34 g a.i./m2 for 3 and 4 times, the residues of imidacloprid in mushroom were close to the MRL in EU(0.05 mg/kg) after 10 days.
引文
[1]王恒生,陈克龙,李怡,等.茶树菇的经济价值及开发应用[J].中国园艺文摘, 2015(2):42-44.
[2]罗传生,罗家燕.食用菌学[M].北京:中国农业大学出版社, 2004.
[3]徐宁,陆欢,喻初权,等. 4种农药对茶树菇菌丝生长影响及在子实体内残留研究[J].中国食用菌, 2017, 36(2):60-63, 68.
[4]丁湖广.杨树菇(茶薪菇)安全生产应注意的问题[J].中国蔬菜,2007(10):61.
[5]农药登记数据.中国农药信息网[DB/OL].[2018-08-30]. Http://www.chinapesticide.gov.cn/hysj/index.jhtml.
[6]曲绍轩,宋金俤,马林,等.灭蝇胺、除虫脲拌料处理防治古田山多菌蚊[J].食用菌学报, 2010, 17(3):60-63.
[7]赵晓娜,罗佳,吴梅香,等.吡虫啉对菇蚊蝇仿效及对食用菌菌丝生长影响[J].中国食用菌, 2011, 30(5):54-56.
[8]食品中农药最大残留限量:GB 2763—2016[S].北京:中国农业出版社, 2017.
[9]常津毓,常义,侯志广,等.平菇和榆黄蘑及其培养料中吡虫啉的残留分析方法[J].中国食用菌, 2016, 35(1):62-64.
[10]宋卫国,杨慧,王伟民,等.吡虫啉在食用菌中的残留检测及安全性研究[J].食用菌学报, 2012, 19(3):86-90.
[11] NY/T 788—2004.农药残留试验准则[S].北京:中国农业出版社,2004.
[2]罗传生,罗家燕.食用菌学[M].北京:中国农业大学出版社, 2004.
[3]徐宁,陆欢,喻初权,等. 4种农药对茶树菇菌丝生长影响及在子实体内残留研究[J].中国食用菌, 2017, 36(2):60-63, 68.
[4]丁湖广.杨树菇(茶薪菇)安全生产应注意的问题[J].中国蔬菜,2007(10):61.
[5]农药登记数据.中国农药信息网[DB/OL].[2018-08-30]. Http://www.chinapesticide.gov.cn/hysj/index.jhtml.
[6]曲绍轩,宋金俤,马林,等.灭蝇胺、除虫脲拌料处理防治古田山多菌蚊[J].食用菌学报, 2010, 17(3):60-63.
[7]赵晓娜,罗佳,吴梅香,等.吡虫啉对菇蚊蝇仿效及对食用菌菌丝生长影响[J].中国食用菌, 2011, 30(5):54-56.
[8]食品中农药最大残留限量:GB 2763—2016[S].北京:中国农业出版社, 2017.
[9]常津毓,常义,侯志广,等.平菇和榆黄蘑及其培养料中吡虫啉的残留分析方法[J].中国食用菌, 2016, 35(1):62-64.
[10]宋卫国,杨慧,王伟民,等.吡虫啉在食用菌中的残留检测及安全性研究[J].食用菌学报, 2012, 19(3):86-90.
[11] NY/T 788—2004.农药残留试验准则[S].北京:中国农业出版社,2004.