二化螟是水稻的主要害虫，近几年来，由于秋冬气温偏高，四代二化螟虫不仅能严重为害晚稻，而且越冬死亡率降低，再加上机割面积扩大，稻秆遗弃田头增多，使螟虫转化率提高。另方面，杀虫双、三唑磷等药的多年使用，使螟虫抗性增强，药效下降，致使二化螟为害加重，已成为... Chilo suppressalis is the main pest of rice. In recent years, due to the high temperature in autumn and winter, the fourth generation of stem borer not only can seriously damage the late rice, but also reduce the overwintering mortality rate. In addition, with the increase of cutting area, , So that the stem borer conversion rate. On the other hand, insecticidal double, triazophos and other drugs for many years to use, so that borers resistance increased, decreased efficacy, resulting in increased damage stem borer, has become ...