1. A new typal insecticide, its generation, physical and chemical properties, insecticidal mechanism, insecticidal characteristic and synthesis of diflubenzuron are introduced.
   介绍了新型杀虫剂──除虫脲的发现、理化性质、杀虫机理、杀虫特点及合成方法。
2. According to the author's experience in the control of cotton aphids.the systemic insecticidal action of Systox was different when it was applied at different times of the day.
   正>在与贫下中农一起用1059(内吸磷)防治棉蚜的多次生产实践中作者曾经注意到,一天之内不同时间喷药,药效有差异,傍晚喷药药效较好。

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