吡虫啉在金银花及土壤中的残留动态研究  

Dynamics of imidacloprid residues in honeysuckles and soils

作　　者：刘清浩[1,2] 刘新涛[1] 倪云霞[1] 刘红彦[1] 张玉军[3] 

机构地区：[1]河南省农业科学院植物保护研究所,郑州450002 [2]中北大学,太原030051 [3]河南工业大学,郑州450052

出　　处：《植物保护》2011年第1期90-92,共3页Plant Protection

基　　金：国家科技攻关计划(2001BA701A58-01);河南省重点科技攻关计划(0623033700)

摘　　要：采用IqPLC-DAD方法对吡虫啉在金银花及土壤中的残留动态进行研究。该方法最小检出量为0．0212ng，样品添加回收率为80．9％～84．6％，变异系数为7．74％～18．15％。研究结果表明：吡虫啉在金银花和土壤中的半衰期分别为1．52～4．65、11．07～19．09d。建议金银花中吡虫啉的最大残留限量（MRL）为3．0mg／kg；10%吡虫啉可湿性粉剂防治金银花蚜虫，用药量为30g／hm2（有效成分），采用喷雾的施药方法，在每茬花中最多施药2次，安全施药间隔期为7d。HPLC-DAD was developed to study the residual dynamics and the final residues of imidacloprid in honeysuckles and soils. The lowest detection limit of this method was 0.021 2 ng. The recovery of imidacloprid added to honeysuckle and soil samples ranged from 80.9% to 84.6% with a coefficient of variation of 7.74% to 18.15%. The results showed that the degradation half life of imidacloprid was 1.52--4.65 d in honeysuckles and 11.07--19.09 d in soils. It was suggested that the MRL of imidacloprid in honeysuckles was 3.0 mg/kg. When 10% imidacloprid WP was applied to control the aphids on honeysuckles at 30 g/hm2 （effective ingredients）, one or two times of applications were allowed during each flowering period, with the safe interval of seven days from harvest.

关 键 词：吡虫啉 高效液相色谱 金银花 土壤 残留动态 

分 类 号：S481.8[农业科学—农药学]