苯醚甲环唑在黄瓜和土壤中的残留动态研究  

Dynamic Analysis of Difenoconazole Residue in Cucumbers and Soil

作　　者：伍一红[1] 龚道新[1] 周圣超[1] 胡瑞兰[1] 李小娇[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《农药科学与管理》2010年第10期29-32,共4页Pesticide Science and Administration

摘　　要：采用田间试验方法,借助气相色谱检测技术研究苯醚甲环唑在黄瓜和土壤中的残留与降解动态。结果表明,苯醚甲环唑在黄瓜中的降解比土壤中快,在黄瓜中的降解半衰期为6.46～7.21d;在土壤中的降解半衰期为8.77～9.94d.苯醚甲环唑10%水分散粒剂在黄瓜上按照推荐有效成分剂量(125.0g a.i./hm2),施药3次,采收期距最后1次3d,黄瓜和土壤中苯醚甲环唑残留量均低于UK/EC规定的最高残留限量(MRL,0.1mg/kg)。A field experiment Was conducted to reveal the dissipation rate and residue analysis of difenoconazole by gas chromatography in cucumbers and soil.Difenoconazole degraded more rapidly in cucumbers than in soil.The half-lives in cucumbers was 6.46～7.21d,and in the soil was 8.77～9.84d.When the cucumbers were treated by 10% difenoconazole,WG at recommended dose（125.0g a.i./hm2） three times,on day 7 after the last application the final residue of difenoconazole in the cucumbers and soil was lower than the maximum residue limit（MRL,0.1mg/kg） for UK/EC.These results suggested that difenoconazole was a kind of low residual,easily dissipated fungicide.

关 键 词：苯醚甲环唑 黄瓜 土壤 残留动态 

分 类 号：S482.2[农业科学—农药学] S481.8[农业科学—植物保护]