当前位置: 首页 > 文章 > 哒螨灵在棉花和土壤中的残留及消解动态研究 现代农药 2014 (1) 43-46
Position: Home > Articles > Study on Residue Analysis and Degradation of Pyridaben in cotton and Soil Modern Agrochemicals 2014 (1) 43-46

哒螨灵在棉花和土壤中的残留及消解动态研究

作  者:
吴绪金;马欢;马婧玮;李通;汪红;张军锋
单  位:
河南省农业科学院农业质量标准与检测技术研究中心;河南省粮食质量安全与检测重点实验室
关键词:
哒螨灵;棉花;土壤;消解动态;最终残留
摘  要:
研究了哒螨灵在棉花和土壤中的残留及消解动态,采用气相色谱-电子捕获检测器进行定量分析。哒螨灵在棉籽、棉花叶及土壤中添加平均回收率为82.36%~113.94%,相对标准偏差为1.76%~8.07%。其最小检出量为1×10-11 g,在棉籽、棉花叶及土壤中的最低检测浓度均为0.01mg/kg。2011和2012年在河南省和湖南省的田间残留试验结果表明:哒螨灵在棉花叶中的消解半衰期为0.84~2.5 d,土壤中的消解半衰期为5.7~7.3 d;哒螨灵在棉籽中的最终残留量均≤0.01mg/kg,说明该药为低残留、易消解农药。建议采用10%哒螨灵微乳剂防治红蜘蛛,最高有效成分用量为112.5 g/hm2,最多施药3次,安全间隔期为14 d。
译  名:
Study on Residue Analysis and Degradation of Pyridaben in cotton and Soil
作  者:
WU Xu-jin;MA Huan;MA Jing-wei;LI Tong;WANG Hong;ZHANG Jun-feng;Henan Key Laboratory of Grain Quality,Safety and Testing, Research Center of Agricultural Quality Standards and Testing Techniques, Henan Academy of Agricultural Sciences;
关键词:
pyridaben;;cotton;;soil;;dissipation dynamics;;residue
摘  要:
Dissipation dynamics and residues of pyridaben in cotton and soil were reported, and pyridaben was determined by GC-ECD. The fortified recoveries in cottonseed, cotton leaf and soil at 0.01-0.2 mg/kg were 82.36%-113.94% with the relative standard deviations of 1.76%-8.07%. The limit of detection of the analytical method was 1×10-11 g at a signal-to-noise ratio of 3, and the limits of quantification were 0.01 mg/kg in cottonseed, cotton leaf and soil. The dissipation dynamics of pyridaben in Henan and Hunan Province were investigated in 2011 and 2012. The results showed that the half-lives of pyridaben were 0.84-2.5 d in cotton leaf, 5.7-7.3 d in soil. The final residues of pyridaben in cottonseed were all less than 0.01 mg/kg. Pyridaben is an easily dissipated and low residues pesticide, so it could be safely used in cotton with the maximum active ingredient dosage of 112.5 g/hm2, the spray times of 3, preharvest interval(PHI) of 14 d.

相似文章

计量
文章访问数: 9
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊