西安地区夏玉米草地贪夜蛾发生及防控对策

草地贪夜蛾是一种跨境迁飞性重大害虫，具有寄主范围广、繁殖能力强、迁飞扩散快、为害程度重、防治难度大等特点。自2019年草地贪夜蛾入侵我国云南后，当年已扩散至包括陕西省在内的26个省份发生为害，发生面积5 013.36 hm，严重威胁粮食安全。2019年，西安各区县的玉米种植区草地贪夜蛾普遍发生，全市发生面积2 172.81 hm，占据全省的43.34%。文章对草地贪夜蛾在西安地区2019年的发生情况进行总结，旨在为今后草地贪夜蛾防控及可持续治理提供理论依据和技术支持。

Occurrence of Spodoptera frugiperda in Xi'an Area and Its Control Measures

Spodoptera frugiperda is an important invasive pest which has the characteristics of wide host range, strong reproductive capacity, strong capacity of dispersal and migration, and it is severely destructive and difficult to be controlled. Since S. frugiperda invaded Yunnan province in early 2019, it has spread to 26 provinces including Shaanxi province within a year, the occurrence area was 5 013.36 hm.S. frugiperda has become a serious threat to food security. In 2019, S. frugiperda was prevalent in maize growing areas in Xi''an, with occurrence area of 2 172.81 hm, accounting for 43.34% of the total growing area in Shaanxi province. In this paper, we summarized the occurrence of S. frugiperda in Xi''an in 2019, it is expected to provide theoretical basis and technical support for sustainable prevention and control of S. frugiperda in the future.