浙江农业学报

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丁氟螨酯在草莓中的残留消解动态及安全性评价

  

  1. (1建德市农业技术推广中心,浙江 建德 311600;2杭州市植保土肥总站,浙江 杭州 310020)
  • 出版日期:2014-11-25 发布日期:2014-12-02

Residue dynamics and safely applying technology of cyflumetofen in strawberry

  1. (1 Jiande Agricultural Bureau, Jiande, Zhejiang 311600;2 Hangzhou Plant Protection and Soil\|fertilizer Station,Hangzhou, Zhejiang 310020)
  • Online:2014-11-25 Published:2014-12-02

摘要: 为明确在采果期使用丁氟螨酯防治草莓红蜘蛛可能产生的食用安全风险,对丁氟螨酯在草莓上使用后的残留动态进行评价。在保护地条件下20%丁氟螨酯SC以最高推荐使用量和15倍最高推荐使用量各施药1次和2次。结果表明,其在草莓上的最终残留量受施药浓度和施药次数的影响,残留风险与田间用药剂量、用药次数正相关。以最终残留量试验的高剂量用药1次,探索其残留消解动态,测定结果表明,果实上原始沉积量为05882 mg·kg-1,半衰期为9364 d。参考国外农药残留限量标准和ADI值规定,采用风险商的方法进行评估,不同施药浓度、施药次数下丁氟螨酯用药后1~21 d的草莓对2~4岁、18~30岁和60~70岁人群的风险均较低(风险商为0001~0020)。因此,建议草莓中丁氟螨酯的最高残留限量值设定为2 mg·kg-1,按推荐剂量施药1~2次,安全间隔期为7 d,在我国草莓连续采收的生产方式下,安全间隔期应延长1~2 d。随着施药浓度或施药次数的增加,安全间隔期也适当延长。

关键词: 草莓, 红蜘蛛, 丁氟螨酯, 消解动态, 风险评估, 风险商

Abstract: To determine the environmental safety of cyflumetofen applied at picking times of strawberry, the residue test and risk assessment were conducted. Based on the field experiment, a positive correlation was found in pesticide residues between harvested fruits and treatment of pesticide in field, when they were applied one time at the recommended dosage and 15 times of dosage under greenhouse conditions. The highest residue among the different treatments herein is 05882 mg·kg-1, with a half\|life of 9364 d. Risk quotient showed that the risk of cyflumetofen for the people aged of 2-4, 18-30 and 60-70 were very low with in 21 d PHI (the risk quotient rane was 0001-0020). Maximum residue limited at 2 mg·kg-1 and PHI at 7 d were recommended for cyflumetofen applied in strawberry. PHI should be prolonged 1-2 days in the continual harvesting mode, and it should be also appropriately prolonged with the raising pesticide concentration.

Key words: strawberry, red spider, cyflumetofen, degradation dynamic, risk assessment, risk quotient