Previous Articles     Next Articles

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

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