摘要
为评价联苯肼酯在草莓上的环境安全性,采用田间试验方法,研究了设施栽培条件下联苯肼酯在草莓上的消解动态和残留情况,并据此对实际生产中的用药模式进行调整,探索最适安全间隔期。结果表明,联苯肼酯2 000倍液施药1次,其在设施栽培草莓上的半衰期为3.15 d;设施栽培草莓上联苯肼酯的残留量受施药浓度、施药次数影响,残留风险与田间用药剂量、用药次数呈正相关。参考国外农药残留限量标准,建议在设施栽培条件下,按常规方法及作用剂量施药;在施药2～3次的情况下,草莓的安全采收间隔期为3 d;随着施药浓度或施药次数增加,安全间隔期应适当延长。
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.
出处
《浙江农业学报》
CSCD
北大核心
2014年第5期1268-1272,共5页
Acta Agriculturae Zhejiangensis
基金
杭州市科技计划项目(20120232B81)
