苯醚甲环唑在套袋与不套袋苹果中的残留及消解动态  

Residue and dissipation dynamics of difenoconazole in bagged and non-bagged apples

作　　者：仇微[1] 王亚南[1] 魏铁松[1] 刘颖超[1] 张瑜[1] 曹克强[1] 

机构地区：[1]河北农业大学植物保护学院,河北保定071000

出　　处：《农药学学报》2013年第4期451-456,共6页Chinese Journal of Pesticide Science

基　　金：国家苹果产业技术体系项目(CARS-28)

摘　　要：通过两年田间试验并结合气相色谱-电子捕获检测(GC-ECD)技术,研究比较了苹果套袋和不套袋2种不同栽培方式下苯醚甲环唑在苹果中的残留及消解动态。结果表明:2011和2012年,苯醚甲环唑在未套袋苹果中的原始沉积量分别为0.44和0.17 mg/kg,消解半衰期分别为12.8和15.5 d;2012年其在套袋苹果中的原始沉积量为0.056 mg/kg,半衰期为31.9 d。两年的试验表明,于苹果收获前35～42 d,按照10%苯醚甲环唑水分散粒剂的推荐剂量和1.5倍推荐剂量(有效成分分别为66.7和100 mg/L)施药2次和3次,距末次施药后7 d采收,套袋和不套袋果实中苯醚甲环唑的残留量均低于我国最大残留限量(MRL)值0.5 mg/kg,其中套袋处理均低于0.03 mg/kg,表明苯醚甲环唑按照推荐剂量及次数施用是安全的;在套袋方式下,苯醚甲环唑残留量明显降低。In order to compare the residue of difenoconazole in bagged and non-baggged apples, gas chromatography-electron capture detector （GC-ECD） was used to analyze the dissipation dynamic of difenoconazole in apples under field condition. The results showed that in 2011 and 2012, the half-life of difenoconazole was 12.8 d and 15.5 d with the original deposition of 0.44 and 0.17 mg/kg in non- bagged fruits,respectively, while the half-life was 31.9 d in bagged fruits in 2012 with the original deposition of 0. 056 mg/kg in fruits. The two years＇ experments showed that spraying 2 -3 times of difenoconazole in recommended concentration of 66.7 mg/L and 1.5 times concentration 100 mg/L respectively from 35 to 42 days before harvesting, the residues of difenoconazole at 7 d after the last spray in bagged and non-bagged apples were all lower than China＇s maximum residue limit 0.5 mg/kg. The residual in bagged apples was lower than 0.03 mg/kg. It indicated that the recommendation dosage of difenoconazole was safe and bagged apple is a better manner for safe apple production.

关 键 词：苯醚甲环唑 苹果 残留 消解动态 

分 类 号：TQ450.263[化学工程—农药化工]