第 44 卷第 4 期Vol. 44 No. 4
2014 年 8 月Aug 2014

所属栏目:农药及中间体

10%硫氟肟醚·甲基嘧啶磷微囊悬浮剂的制备及其药效实验
李 敏1,2,李 涛1,2,高恒旭1,2,陈九星1,2,虞孝云3 (1. 湖南化工研究院 国家农药创制工程技术研究中心,湖南 长沙 410014; 2. 农用化学品湖南省重点实验室,湖南 长沙 410014; 3. 湖南海利常德农药化工有限公司, 湖南 常德 415001)
摘 要:采用界面聚合法,以甲苯-2,4-二异氰酸酯为囊材,制备了硫氟肟醚·甲基嘧啶磷微囊悬浮剂。利用激光粒度分析仪、透射电镜和液相色谱对制备的微囊悬浮剂粒子进行了表征,室内药效实验考察了其对玉米象的活性。结果表明:10%硫氟肟醚·甲基嘧啶磷微囊粒径约0.10~0.35 μm,且分布较为均匀;具有较高的包裹率和载药量,硫氟肟醚的包裹率为90.34%,甲基嘧啶磷包裹率为90.92%;热贮和低温稳定性实验结果表明微囊悬浮剂具有良好的热贮和低温稳定性。室内药效实验表明硫氟肟醚·甲基嘧啶磷微囊悬浮剂对储粮害虫的有很好的活性。界面聚合法制备的硫氟肟醚·甲基嘧啶磷微囊悬浮剂环境友好,持效期明显延长,适于储粮害虫的防治。
关键词:硫氟肟醚;甲基嘧啶磷;微囊悬浮剂;药效
中图分类号:S482.3  文献标识码:A  文章编号:1009-9212(2014)04-0026-04
The Preparation and Field Efficacy Trials of 10% Thiofluoximate·Pirimiphos-methyl Aqueous Suspension Concentrate
LI Min1,2, LI Tao1,2, GAO Heng-xu1,2, CHEN Jiu-xing1,2, YU Xiao-yun3 (1. National Engineering Research Center for Agrochemicals, Hunan Research Institute of Chemical Industry, Changsha 410014, China; 2. Hunan Province Key Laboratory for Agrochemicals, Changsha 410014, China; 3. Hunan Haili Changde Pesticides & Chemicals Co., Ltd, Changde 415001, China)
Abstract:The microcapsule of 10% thiofluoximate·pirimiphos-methyl CS with a mean diameter of 0.10~0.35 μm was prepared by interfacial polymerization and characterized by dynamic light scattering (DLS), transmission electron microscope(TEM)and high-performance liquid chromatography (HPLC). The activity against sitophilus zeamais was investigated and showed that the control effect on stored-product pests was well and the ef?cacy duration was significantly prolonged. The encapsulation rates of thiofluoximate and pirimiphos-methyl were 90.34% and 90.92%, respectively.
Key words:thiofluoximate; pirimiphos-methyl; aqueous suspension concentrate; control efficacy
基金项目: 国家科技支撑计划-高纯甲基嘧啶磷清洁生产关键技术(2011BAE06A07-09)。
作者简介: 李 敏(1987-),女,山东滨州人,助理研究员,硕士,主要从事农药制剂加工技术研究(E-mail:limin_1011@163.com)。
收稿日期:2014-06-30