小菜蛾Plutella xylostella(L.)是十字花科作物重要害虫。其种群消长受地理条件、气候变化和耕作方式等多种因素的影响。小菜蛾也是抗药性最强的害虫,几乎对所有杀虫剂产生了抗药性。针对小菜蛾的生活习性和抗药性,统一规范了田间种群系统调查和抗药性监测方法,为其种群动态及抗药性监测提供技术支撑。 Plutella xylostella (L.) is an important pest of cruciferous crops. Its population growth and decline are affected by many factors, such as geographical conditions, climate change and farming methods. Plutella xylostella is also the most resistant pest and is resistant to almost all pesticides. According to the life habit and resistance of diamondback moth, the systematic investigation and resistance monitoring methods of field population were unified and standardized, which provided technical support for the population dynamics and drug resistance monitoring.