The Residues Dynamics of Boscalid in Grape and Soil

The research aimed to assess residues dynamics of boscalid in grape and establish guideline for safety application.Field trails for boscalid residue in grape were conducted in Tianjin and Nanjing.[Results] the half-life of degradation for boscalid was 9.9-12.0 d in grape,32.7-41.5 d in soil.The final residues quantity in grape samples were 0.142-2.445 mg/kg when the last spraying boscalid after 3,7,14 days.[Conclusions] The guideline for safety application was sprayed 3 times with 1000 times diluted of boscalid,the preharvest interval was 7 days.The maximum residue limit was recommended 10 mg/kg.