Abstract: In order to determine the environmental safety of bifenazate， the dynamic changes of bifenazate residue on strawberry was studied under greenhouse condition. Meanwhile， the safe application mode of bifenazate and proper harvest interval of strawberry was explored. It was shown that the half\|life of bifenazate in strawberry was 315 d when it was applied once in 2 000 times diluents. The final bifenazate residue was influenced by both the application concentration and application times， and the environment risk was positively correlated with the application dosages and times. When bifenazate was applied 2 or 3 times at the recommended concentration on strawberry， the proper post\|harvest interval was 3 d， and the harvest interval should be appropriately extended with the increased application dosages and times.

Key words: bifenazate, pesticide residue, food safety